Tricycle frame with closed container structure

Abstract

The utility model discloses a tricycle frame with a closed container structure, which comprises a frame body erected on the ground, a container mechanism used for forming the closed container structure, a storage mechanism used for forming an adjustable storage structure, and a moving mechanism used for improving the advancing stability of the frame, the container mechanism is arranged at the upper end of the frame body, the storage mechanism is arranged in the container mechanism, and the moving mechanism is assembled on the lower portion of the frame body. The closed container structure has the advantages that the container mechanism is arranged, the closed container structure is adopted, and the requirement for moisture-proof and damp-proof closed transportation of goods can be met; the position of the storage baffle can be adjusted to divide the internal space of the container, so that goods of different specifications are limited to meet the transportation requirements of different goods, the moving mechanism is arranged, stable advancing support can be provided for the frame body, and the influence of vibration on the frame can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tricycle frames, in particular to a tricycle frame with a closed cargo box structure. Background Art

[0002] In the prior art, an electric tricycle is a three-wheel transport vehicle powered by a battery and driven by a motor for carrying goods or people. It uses a tubular large-capacity, left and right liners, deep-discharge, traction-type battery, which can meet the requirements of continuous discharge for long-time work. The battery can be used normally for two years without reducing its internal capacity. Its motor adopts a DC series-wound traction-type brushed or brushless motor, and a speed regulation and force-increasing device is provided inside the motor, which is not easily damaged during normal use, ensuring strong output power. Electric tricycles are divided into various types such as household type, freight type, and factory type according to their uses. As an environmentally friendly and clean short-distance commuting tool, electric tricycles have been widely used in people's daily production and life. However, the cargo box of traditional electric tricycles is often open-top, without basic anti-theft function, and has a fixed structure, unable to organize and fix items in an orderly manner, often resulting in item shaking during transportation, and even the phenomenon of items falling off. For the cargo box type electric tricycle for carrying goods, its cargo box basically adopts an integral fixed encapsulation structure, that is, the cargo box is welded and installed during factory production and is not detachable. When unloading, since there is still a certain distance between the cargo box and the ground, the goods in the cargo box need to be manually lifted out, which is time-consuming and laborious and greatly affects the unloading efficiency.

[0003] The Chinese utility model patent with the application number: 202021047786.X discloses an electric tricycle with a storage function, including a vehicle body. A frame is arranged on the vehicle body. A seat cabinet is arranged on the front side of the frame. A cargo box is arranged on the rear side of the frame. A plurality of storage racks are arranged in the cargo box. A pressing plate is rotatably connected to the frame, and the length of the pressing plate is equal to the length of the cargo box. A bolt is fixedly installed on the upper right side of the cargo box, and an opening is provided on the bolt, and a lock is arranged on the opening. However, for this kind of electric tricycle with a storage function, items need to be placed in the storage box in sequence and also need to be taken out in sequence. The taking and placing methods are relatively cumbersome, the unloading efficiency is low, and it cannot meet the use requirements of users for quick unloading, with great use limitations. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a tricycle frame with a closed cargo box structure.

[0005] To achieve the above purpose, the technical solution proposed by the utility model is:

[0006] A tricycle frame with a closed cargo box structure, including a frame body, the frame body is erected on the ground, and further includes a cargo box mechanism for forming a closed cargo box structure, a storage mechanism for forming an adjustable storage structure, and a moving mechanism for enhancing the traveling stability of the frame. The cargo box mechanism is arranged at the upper end of the frame body, the storage mechanism is configured inside the cargo box mechanism, and the moving mechanism is assembled at the lower part of the frame body.

[0007] The cargo box mechanism includes a cargo box body, a cargo box tailboard, and a cargo box cover. The cargo box body is arranged at the upper end of the frame body and is fixedly connected to the frame body by bolts. The cargo box tailboard is arranged at one end of the cargo box body, and its lower part is hinged to the cargo box body. Installation buckles are symmetrically arranged on both sides of the upper part of the cargo box tailboard. The upper part of the cargo box tailboard is clamped to the cargo box body through two groups of installation buckles. The cargo box cover is arranged at the upper end of the cargo box body, and one side of it is hinged to the cargo box body. An opening handle is arranged on the side of the cargo box cover far from the side hinged to the cargo box body.

[0008] It also includes two unsealing hydraulic rods. The two unsealing hydraulic rods are symmetrically arranged on both sides inside the cargo box body, and their two ends are respectively rotationally connected to the cargo box body and the cargo box cover. The unsealing hydraulic rods are obliquely arranged between the cargo box cover and the cargo box body.

[0009] The storage mechanism includes a storage bottom plate, a baffle assembly, and a support assembly. The storage bottom plate is arranged at the inner lower part of the cargo box body and is fixedly connected to the cargo box body. The baffle assembly is arranged above the storage bottom plate, and the support assembly is configured inside the baffle assembly.

[0010] The baffle assembly includes two adjusting slide rails, two adjusting sliders, and two limit baffles. The two adjusting slide rails are symmetrically arranged on both sides of the upper end of the storage bottom plate and are fixedly connected to the storage bottom plate. The two adjusting sliders are each composed of two sliders arranged side by side at intervals. The two adjusting sliders are respectively arranged on the upper parts of the two adjusting slide rails and are slidably connected to the corresponding adjusting slide rails. The two limit baffles are respectively arranged at the upper ends of the two adjusting sliders and are fixedly connected to the corresponding adjusting sliders.

[0011] It also includes two locking screws. Each group of locking screws is composed of two screws arranged side by side at intervals. The two groups of locking screws are respectively arranged on the two adjusting sliders and penetrate through the corresponding adjusting sliders and are threadedly connected to the adjusting sliders. The locking screws are in contact with the corresponding adjusting slide rails.

[0012] The support assembly includes a support base plate, a support platform, and a support cylinder. There are two sets of the support base plates, and the two sets of support base plates are arranged side by side at intervals on the upper end of the storage base plate and fixedly connected to the storage base plate. The support platform is arranged on the upper ends of the two sets of support base plates and is clamped to the support base plates through mounting blocks. The support cylinder is arranged in the middle of the upper end of the storage base plate and fixedly connected to the storage base plate. The support cylinder is located between the two sets of support base plates, and its output end is fixedly connected to the support platform through bolts.

[0013] The moving mechanism includes a moving bridge, a moving main shaft, and moving rollers. There are two sets of the moving bridges, and the two sets of moving bridges are symmetrically arranged on both sides of the lower part of the vehicle frame body and fixedly connected to the vehicle frame body through mounting frames. The moving main shaft is arranged between the two sets of moving bridges, and its two ends are respectively fixedly connected to the two sets of moving bridges through mounting frames. There are two sets of the moving rollers, and the two sets of moving rollers are symmetrically arranged at the two ends of the moving main shaft and are rotationally connected to the moving main shaft through bearings.

[0014] It further includes shock-absorbing top springs and shock-absorbing support frames. There are two sets of the shock-absorbing top springs, and the two sets of shock-absorbing top springs are symmetrically arranged on the upper parts of the two ends of the moving main shaft and fixedly connected to the moving main shaft through mounting seats. The shock-absorbing top springs are arranged vertically. There are two sets of the shock-absorbing support frames, and the two sets of shock-absorbing support frames are symmetrically arranged on both sides of the lower part of the vehicle frame body corresponding to the two sets of shock-absorbing top springs and are fixedly connected to the vehicle frame body. There is a gap between the shock-absorbing support frame and the corresponding shock-absorbing top spring.

[0015] It further includes a support tube, a support rocker, a support core rod, and a support universal wheel. The support tube is arranged at one end of the vehicle frame body away from the cargo box tail plate and is fixedly connected to the vehicle frame body. The support tube is arranged vertically and penetrates through the vehicle frame body. The support rocker is arranged on the upper part of the support tube and is rotationally connected to the support tube. The support core rod is arranged corresponding to the support rocker on the lower part of the support tube and is inserted into the support tube. The upper end of the support core rod is threadedly connected to the lower part of the support rocker through a threaded sleeve. The support universal wheel is arranged at the lower end of the support core rod and is rotationally connected to the support core rod through a mounting seat.

[0016] The beneficial effects of the present utility model are:

[0017] There is a cargo box mechanism, which adopts a closed cargo box structure, can meet the closed transportation requirements of moisture-proof and mildew-proof goods, has a large capacity and strong cargo transportation ability. There is a storage mechanism that can adjust the position of the storage baffle to divide the internal space of the cargo box, so as to limit different specifications of goods to meet the transportation requirements of different goods. It is flexible to use. The cargo box structure can maintain an open state to meet the user's rapid unloading needs. The taking and placing method is simple and the unloading efficiency is high. There is a moving mechanism that can provide stable traveling support for the vehicle frame body and is equipped with a shock absorption structure, which can reduce the impact of vibration on the vehicle frame and thus reduce the impact of vibration on the goods. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the cooperation between the cargo box mechanism and the vehicle frame body of the present utility model;

[0020] Figure 3 is a schematic diagram of the cooperation between the unsealing hydraulic rod and the cargo box cover of the present utility model;

[0021] Figure 4 is a schematic diagram of the cooperation between the storage bottom plate and the baffle assembly of the present utility model;

[0022] Figure 5 is a schematic diagram of the cooperation between the moving mechanism and the vehicle frame body of the present utility model.

[0023] In the figure: 1. Vehicle frame body; 2. Cargo box body; 3. Cargo box tail plate; 4. Cargo box cover; 5. Unsealing hydraulic rod; 6. Storage bottom plate; 7. Adjusting slide rail; 8. Adjusting slider; 9. Limit baffle; 10. Locking screw; 11. Support base plate; 12. Support platform; 13. Support cylinder; 14. Moving bridge; 15. Moving main shaft; 16. Moving roller; 17. Shock absorption top spring; 18. Shock absorption support frame; 19. Support pipe; 20. Support rocker; 21. Support core rod; 22. Support universal wheel. Detailed Description of the Preferred Embodiment

[0024] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] A tricycle frame with a closed cargo box structure includes a vehicle frame body 1 which is erected on the ground. It also includes a cargo box mechanism for forming a closed cargo box structure, a storage mechanism for forming an adjustable storage structure, and a moving mechanism for enhancing the traveling stability of the frame. The cargo box mechanism is arranged at the upper end of the vehicle frame body 1, the storage mechanism is configured inside the cargo box mechanism, and the moving mechanism is assembled at the lower part of the vehicle frame body 1. The schematic diagram of the overall structure of the present utility model is as shown in Figure 1 shown.

[0026] The cargo box mechanism includes a cargo box body 2, a cargo box tailgate 3, and a cargo box cover 4. The cargo box body 2 is arranged at the upper end of the vehicle frame body 1 and is fixedly connected to the vehicle frame body 1 by bolts. The cargo box tailgate 3 is arranged at one end of the cargo box body 2, and its lower part is hinged to the cargo box body 2. Installation buckles are symmetrically arranged on both sides of the upper part of the cargo box tailgate 3. The upper part of the cargo box tailgate 3 is clamped to the cargo box body 2 through two groups of installation buckles. The cargo box cover 4 is arranged at the upper end of the cargo box body 2, and one side of it is hinged to the cargo box body 2. An opening handle is provided on the side of the cargo box cover 4 away from its hinge with the cargo box body 2. The cargo box mechanism is combined with the cargo box body 2, the cargo box tailgate 3, and the cargo box cover 4 to form a closed cargo box structure. Among them, the cargo box body 2 is used as the main structure of the closed cargo box, and the cargo box tailgate 3 is used as the tail baffle structure of the cargo box. The installation and separation between the upper part of the cargo box tailgate 3 and the cargo box body 2 can be realized through the installation buckles. The installation buckle can adopt the buckle structure in the prior art. The cargo box cover 4 is used as the cover structure at the upper end of the cargo box body 2 to jointly form a closed cargo box structure with the cargo box body 2, so as to realize the opening and closing of the upper end of the cargo box body 2 and meet the closed transportation requirements for moisture-proof and moisture-resistant goods. The schematic diagram of the cooperation between the cargo box mechanism of the present utility model and the vehicle frame body 1 is as Figure 2 shown.

[0027] It further includes unsealing hydraulic rods 5. There are two groups of unsealing hydraulic rods 5, which are symmetrically arranged on both sides inside the cargo box body 2, and their two ends are respectively rotatably connected to the cargo box body 2 and the cargo box cover 4. The unsealing hydraulic rods 5 are obliquely arranged between the cargo box cover 4 and the cargo box body 2. Among them, the unsealing hydraulic rods 5 are used as the support structure between the cargo box cover 4 and the cargo box body 2, so as to provide stable support for the cargo box cover 4 to meet the unloading requirements. The schematic diagram of the cooperation between the unsealing hydraulic rods 5 of the present utility model and the cargo box cover 4 is as Figure 3 shown.

[0028] The storage mechanism includes a storage bottom plate 6, a baffle assembly, and a support assembly. The storage bottom plate 6 is arranged at the lower inner side of the cargo box body 2 and is fixedly connected to the cargo box body 2. The baffle assembly is arranged above the storage bottom plate 6, and the support assembly is configured inside the baffle assembly. The storage mechanism is combined with the storage bottom plate 6, the baffle assembly, and the support assembly to form an adjustable storage structure inside the cargo box body 2, so as to limit goods with different shapes and specifications during transportation. Among them, the storage bottom plate 6 is used to provide installation support for the baffle assembly and the support assembly. The baffle assembly is used as an adjustable storage structure inside the cargo box body 2 to limit goods with different shapes and specifications. The support assembly is used as the support structure inside the cargo box body 2 to meet the support placement requirements of the goods. The schematic diagram of the cooperation between the storage bottom plate 6 and the baffle assembly of the present utility model is as Figure 4 shown.

[0029] The baffle assembly includes an adjustment slide rail 7, an adjustment slider 8, and a limit baffle 9. There are two sets of adjustment slide rails 7, which are symmetrically arranged on both sides of the upper end of the storage bottom plate 6 and fixedly connected to the storage bottom plate 6. There are two sets of adjustment sliders 8, and each set of adjustment sliders 8 consists of two sliders arranged side by side at intervals. The two sets of adjustment sliders 8 are respectively arranged on the upper parts of the two sets of adjustment slide rails 7 and are slidably connected to the corresponding adjustment slide rails 7. There are two sets of limit baffles 9, and the two sets of limit baffles 9 are respectively arranged on the upper ends of the two sets of adjustment sliders 8 and are fixedly connected to the corresponding adjustment sliders 8. The baffle assembly cooperates with the adjustment slide rail 7, the adjustment slider 8, and the limit baffle 9 to limit goods of different shapes and specifications. Among them, the adjustment slide rail 7 is used to provide sliding support for the adjustment slider 8, the adjustment slider 8 is used to provide installation support for the limit baffle 9 and drive the limit baffle 9 to slide along the adjustment slide rail 7 to adjust the position of the limit baffle 9, and the limit baffle 9 is used to move under the action of the adjustment slider 8 to adjust the distance between the two sets of limit baffles 9, so as to divide the space inside the cargo box body 2 to limit goods of different shapes and specifications.

[0030] It further includes locking screws 10. There are two sets of locking screws 10, and each set of locking screws 10 consists of two screws arranged side by side at intervals. The two sets of locking screws 10 are respectively arranged on the two sets of adjustment sliders 8 and penetrate through the corresponding adjustment sliders 8 and are threadedly connected to the adjustment sliders 8. The locking screws 10 are in contact with the corresponding adjustment slide rails 7. Among them, the locking screws 10 are used as the locking structure on the adjustment sliders 8, and the adjustment sliders 8 can be positioned by tightening the locking screws 10 so that they are in contact with the adjustment slide rails 7.

[0031] The support assembly includes a support base plate 11, a support platform 12, and a support cylinder 13. There are two sets of support base plates 11, which are arranged side by side at intervals on the upper end of the storage bottom plate 6 and are fixedly connected to the storage bottom plate 6. The support platform 12 is arranged on the upper ends of the two sets of support base plates 11 and is clamped to the support base plates 11 through mounting blocks. The support cylinder 13 is arranged in the middle of the upper end of the storage bottom plate 6 and is fixedly connected to the storage bottom plate 6. The support cylinder 13 is located between the two sets of support base plates 11, and its output end is fixedly connected to the support platform 12 through bolts. The support assembly cooperates with the support base plate 11, the support platform 12, and the support cylinder 13 to form a support structure inside the cargo box body 2 to meet the support placement requirements of goods. Among them, the support base plate 11 is used to provide installation support for the support platform 12, the support platform 12 is used to jointly form a support structure inside the cargo box body 2 with the support base plate 11 to meet the support placement requirements of goods, and the support cylinder 13 is used to adjust the height of the support platform 12 through the telescopic movement of its output end, so as to meet the placement requirements of different goods.

[0032] The moving mechanism includes a moving bridge 14, a moving main shaft 15, and moving rollers 16. There are two sets of moving bridges 14, which are symmetrically arranged on both sides of the lower part of the vehicle frame body 1 and are fixedly connected to the vehicle frame body 1 through mounting brackets. The moving main shaft 15 is arranged between the two sets of moving bridges 14, and its two ends are respectively fixedly connected to the two sets of moving bridges 14 through mounting brackets. There are two sets of moving rollers 16, which are symmetrically arranged at both ends of the moving main shaft 15 and are rotatably connected to the moving main shaft 15 through bearings. The moving mechanism is configured by the cooperation of the moving bridge 14, the moving main shaft 15, and the moving rollers 16 to form a moving structure at the lower part of the vehicle frame, thereby providing stable moving support for the vehicle frame. Among them, the moving bridge 14 is used to provide mounting support for the moving main shaft 15 to assemble the moving main shaft 15 at the bottom of the vehicle frame. The moving main shaft 15 is used to provide rotational support for the moving rollers 16. The moving rollers 16 are used to provide stable moving support for the vehicle frame under the action of the moving main shaft 15 and the moving bridge 14. The schematic diagram of the cooperation between the moving mechanism of the present utility model and the vehicle frame body 1 is as Figure 5 shown.

[0033] It further includes shock-absorbing top springs 17 and shock-absorbing support frames 18. There are two sets of shock-absorbing top springs 17, which are symmetrically arranged above both ends of the moving main shaft 15 and are fixedly connected to the moving main shaft 15 through mounting seats. The shock-absorbing top springs 17 are arranged vertically. There are two sets of shock-absorbing support frames 18, which are symmetrically arranged corresponding to the two sets of shock-absorbing top springs 17 on both sides of the lower part of the vehicle frame body 1 and are fixedly connected to the vehicle frame body 1. There is a gap between the shock-absorbing support frame 18 and the corresponding shock-absorbing top spring 17. Among them, the shock-absorbing top springs 17 are used as shock-absorbing structures on the moving main shaft 15, and the shock-absorbing support frames 18 are used to cooperate with the shock-absorbing top springs 17 to provide shock-absorbing support for the moving main shaft 15 and the vehicle frame body 1.

[0034] It further includes a support tube 19, a support rocker 20, a support core rod 21 and support universal wheels 22. The support tube 19 is arranged at one end of the vehicle frame body 1 away from the cargo box tail plate 3 and is fixedly connected to the vehicle frame body 1. The support tube 19 is vertically arranged and penetrates through the vehicle frame body 1. The support rocker 20 is arranged on the upper part of the support tube 19 and is rotatably connected to the support tube 19. The support core rod 21 is correspondingly arranged at the lower part of the support tube 19 relative to the support rocker 20 and is inserted into the support tube 19. The upper end of the support core rod 21 is threadedly connected to the lower part of the support rocker 20 through a threaded sleeve. The support universal wheels 22 are arranged at the lower end of the support core rod 21 and are rotatably connected to the support core rod 21 through a mounting seat. Among them, the support tube 19 is used to provide installation support for the support rocker 20 and the support core rod 21. The support rocker 20 is used to provide installation support for the support core rod 21 and control the extension length of the support core rod 21 relative to the support tube 19 through its rotational movement in cooperation with the threaded sleeve. The support core rod 21 is used to extend or retract relative to the support tube 19 under the action of the support rocker 20, so as to adjust the height between the support tube 19 and the ground, and further adjust the horizontal state of the cargo box body 2. The support universal wheels 22 are used as the wheel body structure at the lower end of the support core rod 21, so as to cooperate with the moving rollers 16 to provide moving support for the vehicle frame structure.

[0035] Working principle:

[0036] During use, the position of the limit baffle 9 can be adjusted by adjusting the slider 8 to divide the space inside the cargo box body 2, so as to meet the storage requirements of goods with different shapes and specifications. And the support requirements of the goods can be met through the support assembly. When loading or unloading goods, the cargo box tail plate 3 or the cargo box cover 4 can be opened according to the actual situation to meet the loading and unloading requirements. When the cargo box cover 4 is in the open state, the unsealing hydraulic rod 5 provides support for the cargo box cover 4 to ensure that the cargo box cover 4 is opened, so as to meet the unloading requirements.

[0037] The beneficial effects of the present utility model are that it is provided with a cargo box mechanism, adopting a closed cargo box structure, which can meet the closed transportation requirements of moisture-proof and moisture-proof of goods, has a large capacity and strong cargo transportation capacity. It is provided with a storage mechanism, and the position of the storage baffle can be adjusted to divide the internal space of the cargo box, so as to limit goods of different specifications to meet the transportation requirements of different goods. It is flexible to use. The cargo box structure can be kept in the open state to meet the rapid unloading requirements of users. The taking and placing method is simple and the unloading efficiency is high. It is provided with a moving mechanism, which can provide stable traveling support for the vehicle frame body and is configured with a shock-absorbing structure, which can reduce the influence of vibration on the vehicle frame, and thus reduce the influence of vibration on the goods.

[0038] The above has described in detail an embodiment of the present utility model, but the content is only a preferred embodiment of the present utility model and cannot be considered as limiting the scope of implementation of the present utility model. All equivalent changes and improvements made in accordance with the scope of application of the present utility model shall still fall within the scope covered by the patent of the present utility model.

Claims

1. A tricycle frame with a closed cargo box structure, comprising a frame body (1), wherein the frame body (1) is erected on the ground, and is characterized in that: It also includes a cargo box mechanism for forming a closed cargo box structure, a storage mechanism for forming an adjustable storage structure, and a moving mechanism for improving the traveling stability of the frame, the cargo box mechanism being arranged at the upper end of the frame body (1), the storage mechanism being arranged inside the cargo box mechanism, and the moving mechanism being assembled at the lower part of the frame body (1); The cargo box mechanism comprises a cargo box body (2), a cargo box tail plate (3) and a cargo box cover (4); the cargo box body (2) is arranged at the upper end of the frame body (1) and is fixedly connected to the frame body (1) by bolts; the cargo box tail plate (3) is arranged at one end of the cargo box body (2) and its lower part is hinged to the cargo box body (2); mounting buckles are symmetrically arranged on both sides of the upper part of the cargo box tail plate (3); the upper part of the cargo box tail plate (3) is clamped to the cargo box body (2) by two groups of mounting buckles; the cargo box cover (4) is arranged at the upper end of the cargo box body (2) and one side of it is hinged to the cargo box body (2); and an opening handle is arranged on the side of the cargo box cover (4) away from the hinged side of the cargo box cover (4) and the cargo box body (2).

2. A tricycle frame with a closed cargo box structure as claimed in claim 1, characterized in that: It also includes an unsealing hydraulic rod (5), wherein the unsealing hydraulic rod (5) is provided with two groups, the two groups of the unsealing hydraulic rod (5) are symmetrically arranged on both sides of the interior of the cargo box body (2), and the two ends thereof are rotatably connected to the cargo box body (2) and the cargo box cover (4), respectively, and the unsealing hydraulic rod (5) is arranged obliquely between the cargo box cover (4) and the cargo box body (2).

3. A tricycle frame with a closed cargo box structure as claimed in claim 2, characterized in that: The storage mechanism comprises a storage bottom plate (6), a baffle assembly and a support assembly, wherein the storage bottom plate (6) is arranged at the lower inner part of the cargo box body (2) and is fixedly connected to the cargo box body (2), the baffle assembly is arranged at the upper part of the storage bottom plate (6), and the support assembly is arranged on the inner side of the baffle assembly.

4. A tricycle frame with a closed cargo box structure as claimed in claim 3, characterized in that: The baffle assembly comprises an adjusting slide rail (7), an adjusting slider (8) and a limiting baffle (9), wherein the adjusting slide rail (7) is provided with two groups, and the two groups of the adjusting slide rails (7) are symmetrically arranged on both sides of the upper end of the storage bottom plate (6) and are fixedly connected to the storage bottom plate (6), and the adjusting slider (8) is provided with two groups, and each group of the adjusting slider (8) is composed of two sliders arranged side by side and spaced apart, and the two groups of the adjusting sliders (8) are respectively arranged on the upper parts of the two groups of the adjusting slide rails (7) and are slidably connected to the corresponding adjusting slide rails (7), and the limiting baffle (9) is provided with two groups, and the two groups of the limiting baffle (9) are respectively arranged on the upper ends of the two groups of the adjusting sliders (8) and are fixedly connected to the corresponding adjusting sliders (8).

5. A tricycle frame with a closed cargo box structure as claimed in claim 4, characterized in that: It also includes locking screws (10), wherein the locking screws (10) are provided in two groups, each group of the locking screws (10) is composed of two screws arranged side by side and spaced apart, the two groups of the locking screws (10) are respectively arranged on the two groups of the adjusting sliders (8) and penetrate the corresponding adjusting sliders (8) and are threadedly connected to the adjusting sliders (8), and the locking screws (10) are in contact with the corresponding adjusting slide rails (7).

6. A tricycle frame with a closed cargo box structure as claimed in claim 5, characterized in that: The support assembly comprises a support base plate (11), a support platform (12) and a support cylinder (13); the support base plate (11) is provided with two groups; the two groups of the support base plates (11) are arranged side by side and spaced apart at the upper end of the storage bottom plate (6) and are fixedly connected to the storage bottom plate (6); the support platform (12) is arranged at the upper ends of the two groups of the support base plates (11) and is clamped to the support base plates (11) through a mounting clamp; the support cylinder (13) is arranged at the middle part of the upper end of the storage bottom plate (6) and is fixedly connected to the storage bottom plate (6); the support cylinder (13) is located between the two groups of the support base plates (11) and its output end is fixedly connected to the support platform (12) through a bolt.

7. A tricycle frame with a closed cargo box structure as claimed in claim 6, characterized in that: The moving mechanism comprises a moving bridge (14), a moving main shaft (15) and a moving roller (16); the moving bridge (14) is provided with two groups, the two groups of the moving bridges (14) are symmetrically arranged on both sides of the lower part of the frame body (1) and are fixedly connected to the frame body (1) through a mounting frame; the moving main shaft (15) is arranged between the two groups of the moving bridges (14) and its two ends are respectively fixedly connected to the two groups of the moving bridges (14) through a mounting frame; the moving roller (16) is provided with two groups, the two groups of the moving roller (16) are symmetrically arranged at both ends of the moving main shaft (15) and are rotatably connected to the moving main shaft (15) through a bearing.

8. A tricycle frame with a closed cargo box structure as claimed in claim 7, characterized in that: It also includes a shock-absorbing top spring (17) and a shock-absorbing support frame (18), wherein the shock-absorbing top spring (17) is provided with two groups, the two groups of the shock-absorbing top spring (17) are symmetrically arranged at the upper parts of the two ends of the movable main shaft (15) and are fixedly connected to the movable main shaft (15) through a mounting seat, the shock-absorbing top spring (17) is arranged vertically, and the shock-absorbing support frame (18) is provided with two groups, the two groups of the shock-absorbing support frames (18) are symmetrically arranged on both sides of the lower part of the frame body (1) corresponding to the two groups of the shock-absorbing top springs (17) and are fixedly connected to the frame body (1), and a spacing is left between the shock-absorbing support frame (18) and the corresponding shock-absorbing top spring (17).

9. A tricycle frame with a closed cargo box structure as claimed in claim 8, characterized in that: It also includes a support tube (19), a support rocker (20), a support core rod (21) and a support universal wheel (22), wherein the support tube (19) is arranged at one end of the frame body (1) away from the cargo box tail plate (3) and is fixedly connected to the frame body (1), the support tube (19) is vertically arranged and passes through the frame body (1), the support rocker (20) is arranged at the upper part of the support tube (19) and is rotatably connected to the support tube (19), the support core rod (21) is arranged at the lower part of the support tube (19) corresponding to the support rocker (20) and is plugged into the support tube (19), the upper end of the support core rod (21) is threadedly connected to the lower part of the support rocker (20) through a threaded sleeve, and the support universal wheel (22) is arranged at the lower end of the support core rod (21) and is rotatably connected to the support core rod (21) through a mounting seat.

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