Camping car main body

Abstract

The utility model belongs to the technical field of camping cars, and particularly relates to a camping car body which comprises a car body and wheels, a bottom frame is arranged at the bottom of the car body, foldable end frames are arranged at the front end and the rear end of the car body, vertical rods are arranged on the two sides of each end frame respectively, and foldable side frames are arranged on the left side and the right side of the car body respectively. The two ends of the side frame are connected with the vertical rods on the two end frames correspondingly, the bottom frame comprises two first folding units, the two first folding units are connected with the two end frames correspondingly, each first folding unit comprises a connecting base, and two first supporting connecting rods and two second supporting connecting rods are rotationally arranged on the lower side of each connecting base; the two first supporting connecting rods are rotationally connected with the vertical rods on the two sides of the end frame correspondingly, pull rods connected with the first folding units correspondingly are arranged on the side frames, the side frames can pull the second supporting connecting rods through the pull rods, and the second supporting connecting rods on the two first folding units are mutually crossed and stacked to form an X shape. The utility model aims to provide the camping car main body which is long in service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of camping vehicles, and in particular relates to a camping vehicle main body. Background Art

[0002] A camper, also known as a camping car, is a common means of transportation for people during outdoor activities. It has a simple structure and is easy to fold and store, so more and more people are using campers in outdoor activities.

[0003] Most campers on the market include a body with a pull rod and a wheel assembly. In order to fully fold the body, both the bottom and the sides of the body can be folded. For example, Chinese utility model patent CN 202411144938.0 discloses a foldable and low-profile trailer, which includes four telescopic columns arranged at intervals in a rectangular shape and at least two oppositely arranged side folding mechanisms, with both ends of the side folding mechanisms respectively hinged to two adjacent telescopic columns. During the folding process of the foldable and shorter trailer, the side folding mechanism drives the telescopic columns connected thereto to contract and shorten; during the unfolding process of the foldable and shorter trailer, the side folding mechanism drives the telescopic columns connected thereto to extend; the height of the foldable and shorter trailer in the folded state is less than the height in the unfolded state; the foldable and shorter trailer also includes a bottom support mechanism, which is hinged between the four telescopic columns, and a group of relatively arranged side folding mechanisms are respectively connected to the bottom support mechanism through a first connecting assembly and a second connecting assembly; the bottom support mechanism includes a first bottom connecting member and a second bottom connecting member, the first connecting assembly is provided with a third bottom connecting member, and the second connecting assembly is provided with a fourth bottom connecting member; the first bottom connecting member is connected to the lower ends of two adjacent telescopic columns through a first bottom connecting rod by rotation at a limited angle; the second bottom connecting member is connected to the lower ends of the other two adjacent telescopic columns through a second bottom connecting rod by rotation at a limited angle.

[0004] In the above structure, the bottom support mechanism includes two independent parts, and the two parts cannot directly contact each other, which leads to poor stability of the bottom support mechanism and is prone to deformation and shaking. When the trailer carries heavy objects, the weight of the objects cannot be well distributed between the two parts. The chassis is prone to deformation, and the bottom rod is easily damaged by excessive force, which affects the service life of the camper. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a camping vehicle body with a long service life.

[0006] The purpose of this utility model is achieved in this way:

[0007] A camping vehicle body comprises a vehicle body and wheels, a bottom frame is provided at the bottom of the vehicle body, foldable end frames are provided at the front and rear ends of the vehicle body, upright poles are respectively provided on both sides of the end frames, and foldable side frames are respectively provided on the left and right sides of the vehicle body, the ends of the side frames are respectively connected to the upright poles on the two end frames, and the side frames and the end frames can be folded together to make the upright poles gather together, the bottom frame comprises two groups of first folding units, the two groups of first folding units are respectively connected to the two end frames, the first folding unit comprises a connecting seat, two first supporting links and two second supporting links are rotatably provided on the lower side of the connecting seat, the two first supporting links are respectively rotatably connected to the upright poles on both sides of the end frames, the second supporting links on the two first folding units are cross-stacked to form an X shape, so that one first folding unit can support the other first folding unit, so that the two first folding units can jointly support articles in the vehicle body;

[0008] The side frames are provided with pull rods respectively connected to the first folding units, and the side frames can pull the second supporting links through the pull rods.

[0009] The utility model is further configured as follows: the middle portion of the second support link is bent downward and a swing groove is formed on the upper side of the second support link; the second support link on another first folding unit passes through the swing groove and is connected to the pull rod; the swing groove can support the second support link.

[0010] The utility model is further configured as follows: the side frame includes two groups of second folding units, the second folding units include two second connecting rods hinged in an X shape, the two second connecting rods on the two groups of second folding units are rotatably connected, the pull rods are respectively provided on the two groups of second folding units, and a sliding sleeve is slidingly provided on the pull rods. The pull rod is rotatably connected to a second connecting rod on the second folding unit, and the sliding sleeve is rotatably connected to another second connecting rod on the second folding unit. The two second connecting rods, the sliding sleeve and the pull rod are combined to form a four-bar slider mechanism.

[0011] The utility model is further configured as follows: the pull rod is vertically arranged, and the two second connecting rods on the second folding unit and the pull rod are distributed in an isosceles triangle, thereby preventing the pull rod from swinging to both sides during the unfolding or folding process of the two second connecting rods on the second folding unit.

[0012] The utility model is further configured as follows: a sliding hole adapted to the pull rod is provided in the sliding sleeve, a through hole and a countersunk hole are provided on the side wall of the sliding hole, the countersunk hole is provided in the extension direction of the through hole, and the fastener can pass through the through hole and be installed in the countersunk hole, so that the fastener rotatably connects the sliding sleeve with the second connecting rod.

[0013] The utility model is further configured as follows: the sliding sleeve comprises two sleeves arranged at intervals, the two sleeves are fixedly connected by a fixing rod, and the sleeves are respectively slidably connected to the pull rod.

[0014] The utility model is further configured as follows: the end frame includes a third folding unit arranged between the vertical poles, a sliding sleeve is slidably arranged on the vertical poles, the third folding unit includes two third connecting rods hinged in an X shape, one third connecting rod is rotatably connected to the vertical pole, the other third connecting rod is rotatably connected to the sliding sleeve, and a second connecting rod in the second folding unit is rotatably connected to the vertical pole, the sliding sleeve can drive the other second connecting rod in the second folding unit to move, so that the second folding unit and the third folding unit can be folded synchronously.

[0015] The utility model is further configured as follows: the end frame includes two groups of third folding units, the two third connecting rods on the two groups of third folding units are rotatably connected respectively, the two vertical poles are provided with a first hinge groove, the sliding sleeve is provided with a second hinge groove adapted to the second connecting rod, and the two third connecting rods on one group of third folding units are bent relative to each other, so that the first hinge grooves on the two vertical poles are arranged relative to each other, and the second hinge grooves on the sliding sleeves on the two vertical poles are arranged relative to each other.

[0016] The utility model is further configured as follows: two auxiliary connecting rods are rotatably provided on the sliding sleeve, and the two auxiliary connecting rods are respectively rotatably connected to the two second connecting rods in the second folding unit to form a four-bar mechanism.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] In the present invention, since the second supporting links on the two first folding units are cross-stacked to form an X shape, when heavy objects are placed on the base frame, the second supporting links on the two groups of first folding units can enable the two first folding units to support each other, which is beneficial to improving the stability of the base frame structure, reducing the deformation and shaking of the base frame during use, and avoiding the mass of the heavy object being concentrated on one first folding unit during use, which may cause damage to the first folding unit. In addition, the cross-crossing second supporting links in this structure can enable the middle part of the second supporting link to be subjected to force, avoiding the second supporting link being bent and damaged due to excessive length, which is beneficial to extending the service life of the camper. The pull rods arranged on the side frames can respectively pull and support the two groups of first folding units, which is beneficial to dispersing the force on the side frames. In addition, this structure disperses the support points of the base frame, which is beneficial to improving the stability of the base frame installation.

[0019] The structure of the downward bending to form the swing groove in the utility model is convenient for the production and processing of the second supporting link, and the setting of the swing groove is conducive to reducing the height difference between the upper ends of the two first folding units, thereby improving the flatness of the bottom of the vehicle body, facilitating the stable placement of items in the vehicle body, and being convenient for users to use; the setting of the guide sleeve facilitates the flexible connection between the base frame and the pull rod, facilitates the unfolding and folding of the camper, and is convenient for users to use, and the setting of the limit part facilitates the stable support of the pull rod to the second supporting link.

[0020] The second folding unit of the utility model is composed of two second connecting rods hinged in an X shape, which has a simple structure and is convenient for production and processing. The pull rods respectively arranged on the second folding units are convenient for the assembly and production of the camper. The setting of the sliding sleeve facilitates the stable movement of the pull rod and the second folding unit, reduces the deflection and shaking of the pull rod during use, and is beneficial to the stable installation of the first folding unit and the chassis; because the two second connecting rods and the pull rod are distributed in an isosceles triangle, the pull rod is prevented from being deflected during the expansion or folding of the camper, which affects the expansion or folding of the camper, and the expansion and folding of the camper are convenient for users.

[0021] The through holes and countersunk holes on the side walls of the sliding hole in the utility model make it easy for the manufacturer to rotatably connect the sliding sleeve and the second connecting rod through fasteners, thereby facilitating stable installation of the sliding sleeve and the second connecting rod and facilitating assembly and production of the camper; the two sleeves arranged at intervals facilitate stable connection between the sliding sleeve and the pull rod, reducing deflection or shaking during use, and facilitating stable sliding of the sliding sleeve on the pull rod.

[0022] The arrangement of the sliding sleeve in the utility model facilitates the synchronous folding of the second folding unit and the third folding unit, facilitates the unfolding and folding of the camper, and is convenient for users to use; the relatively bent third connecting rod facilitates the relative arrangement of the first hinge groove and the second hinge groove on both sides of the end frame, which is convenient for manufacturers to assemble the camper, and this structure is conducive to reducing the types of parts of the camper and the types of molds for the camper, thereby reducing the production cost of the camper; the arrangement of the two auxiliary connecting rods facilitates the flexible unfolding and folding of the second folding unit, reduces the jamming of the second folding unit during use, facilitates the unfolding and folding of the camper, and is convenient for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 This is a diagram of the folded state of the utility model;

[0025] Figure 3 It is an exploded schematic diagram of the vehicle body in the present utility model;

[0026] Figure 4 It is a structural diagram of the first folding unit in the utility model;

[0027] Figure 5 This is a structural diagram of the connecting seat in the utility model;

[0028] Figure 6 This is a schematic structural diagram of the guide sleeve in the utility model;

[0029] Figure 7 It is a structural diagram of the second folding unit in the utility model;

[0030] Figure 8 It is a structural diagram of the middle end frame of the utility model;

[0031] Figure 9 It is a structural diagram of the third folding unit in the utility model;

[0032] Figure 10 This is a schematic structural diagram of the pull rod in the utility model;

[0033] Figure 11 It is a cross-sectional view of the sliding sleeve in the utility model.

[0034] Meaning of the numbers in the figure: 1-base frame; 11-first folding unit; 111-connecting seat; 112-first supporting link;

[0035] 113 - second supporting link; 114 - swing slot; 115 - traction portion; 116 - guide sleeve; 117 - guide hole;

[0036] 118-support wall; 119-storage slot; 1111-movable slot; 1112-abutting wall; 2-side frame;

[0037] 21-second folding unit; 211-second connecting rod; 212-auxiliary connecting rod; 213-first hinge hole;

[0038] 214 - second hinge hole; 3 - end frame; 31 - third folding unit; 32 - vertical rod; 33 - sliding sleeve;

[0039] 311 - third connecting rod; 321 - upper connecting end; 322 - first hinge slot; 323 - third hinge slot;

[0040] 324 - lower connecting end; 325 - connecting slot; 331 - second hinge slot; 332 - fourth hinge slot; 4 - pull rod;

[0041] 41 - rod body; 42 - limiting sleeve; 43 - third hinge hole; 5 - sliding sleeve; 51 - sleeve; 52 - fixing rod;

[0042] 53-sliding hole; 54-through hole; 55-counterbore hole. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to specific embodiments in conjunction with the accompanying drawings:

[0044] See also Figures 1 to 11As shown, a camping vehicle body includes a vehicle body and wheels, a base frame 1 is provided at the bottom of the vehicle body, foldable end frames 3 are provided at the front and rear ends of the vehicle body, and vertical poles 32 are respectively provided on both sides of the end frames 3, and foldable side frames 2 are respectively provided on the left and right sides of the vehicle body, and the two ends of the side frames 2 are respectively connected to the vertical poles 32 on the two end frames 3. The base frame 1 includes two groups of first folding units 11, and the two groups of first folding units 11 are respectively connected to the two end frames 3. The first folding unit 11 includes a connecting seat 111, and two first supporting links 112 and two second supporting links 113 are rotatably provided on the lower side of the connecting seat 111. The two first supporting links 112 are respectively rotatably connected to the vertical poles 32 on both sides of the end frames 3, and a pull rod 4 connected to the first folding unit 11 is provided on the side frame 2. The side frame 2 can pull the second supporting link 113 through the pull rod 4, and the second supporting links 113 on the two first folding units 11 cross each other to form an X shape, so that one first folding unit 11 can support the other first folding unit 11.

[0045] In the above structure, since the second support links 113 on the two first folding units 11 are cross-stacked to form an X shape, when heavy objects are placed on the base frame 1, the second support links 113 on the two groups of first folding units 11 can enable the two first folding units 11 to support each other, which is beneficial to improving the stability of the base frame 1 structure, reducing the deformation and shaking of the base frame 1 during use, and avoiding the mass of the heavy object being concentrated on one first folding unit 11 during use, causing damage to the first folding unit 11. The cross-crossed second support links 113 in this structure can make the middle part of the second support link 113 bear force, avoiding the second support link 113 from bending and being damaged due to excessive length, which is beneficial to extending the service life of the camper; the pull rod 4 set on the side frame 2 can pull and support the two groups of first folding units 11 respectively, which is beneficial to dispersing the force on the side frame 2, and the structure disperses the support points of the base frame 1, which is beneficial to improving the stability of the installation of the base frame 1.

[0046] The side frame 2 includes two groups of second folding units 21, and the second folding units 21 include two second connecting rods 211 hinged in an X shape. The two second connecting rods 211 on the two groups of second folding units 21 are rotatably connected. A sliding sleeve 5 is slidingly provided on the pull rod 4. The pull rod 4 is rotatably connected to a second connecting rod 211 on the second folding unit 21, and the sliding sleeve 5 is rotatably connected to another second connecting rod 211 on the second folding unit 21. The two second connecting rods 211, the sliding sleeve 5 and the pull rod 4 are combined to form a four-bar slider mechanism. The second folding unit 21 composed of two second connecting rods 211 hinged in an X shape in this structure has a simple structure and is convenient for production and processing. The pull rods 4 respectively arranged on the second folding units 21 are convenient for the assembly and production of the camper, and are convenient for dispersing the force of the chassis 1. The setting of the sliding sleeve 5 facilitates the stable movement of the pull rod 4 and the second folding unit 21, reduces the deflection and shaking of the pull rod 4 during use, and is conducive to the stable installation of the first folding unit 11 and the chassis 1.

[0047] In the present invention, the middle part of the second support link 113 is bent downward and a swing groove 114 is formed on the upper side of the second support link 113. The second support link 113 on the other first folding unit 11 passes through the swing groove 114 and is connected to the pull rod 4. The swing groove 114 can support the second support link 113. The structure of bending downward to form the swing groove 114 is convenient for the production and processing of the second support link 113, and the setting of the swing groove 114 is conducive to reducing the height difference between the upper ends of the two first folding units, thereby improving the flatness of the bottom of the vehicle body, facilitating the stable placement of items in the vehicle body, and facilitating user use.

[0048] In this embodiment, a swing groove 114 is provided on the upper side of another second support link 113 located below the second support link 113. During actual assembly and production, the two second support links 113 on the same first folding unit 11 can be provided with a swing groove 114, or a second support link 113 with a swing groove 114 can be provided on each of the two first folding units 11. In the drawings of the utility model specification, the two second support links 113 on the same first folding unit 11 are provided with a swing groove 114.

[0049] Production errors and installation errors can easily lead to uneven expansion and contraction of the base frame 1 and the side frame 2. If the second supporting link 113 is directly connected to the pull rod 4 for rotation, it can easily cause the camper to get stuck during expansion and contraction during use. Preferably, a guide sleeve 116 is slidingly provided on the pull rod 4, and a limiting portion for limiting the movement range of the guide sleeve 116 is provided on the pull rod 4. A guide hole 117 adapted to the pull rod 4 is provided on the guide sleeve 116, and the guide sleeve 116 is rotatably connected to the second supporting link 113. The setting of the guide sleeve 116 facilitates the flexible connection between the base frame 1 and the pull rod 4, facilitates the expansion and folding of the camper, and is convenient for users to use. The setting of the limiting portion facilitates the stable support of the pull rod 4 to the second supporting link 113.

[0050] In this embodiment, a support wall 118 for supporting the second support link 113 is provided on the guide sleeve 116. The support wall 118 limits the relative rotation of the second support link 113 and the guide sleeve 116, which facilitates the stable deployment of the base frame 1 and is convenient for users.

[0051] The pull rod 4 in this embodiment includes a rod body 41, a guide sleeve 116 is slidably arranged on the rod body 41, and a limiting sleeve 42 is fixedly arranged at the lower end of the rod body 41. The limiting sleeve 42 can prevent the guide sleeve 116 from detaching from the rod body 41, and the limiting sleeve 42 can support the guide sleeve 116.

[0052] The sliding sleeve 5 is provided with a sliding hole 53 adapted to the pull rod 4, and the side wall of the sliding hole 53 is provided with a through hole 54 and a countersunk hole 55. The countersunk hole 55 is arranged in the extension direction of the through hole 54. The fastener can pass through the through hole 54 and be installed in the countersunk hole 55, so that the fastener can rotatably connect the sliding sleeve 5 with the second connecting rod 211. The through hole 54 and the countersunk hole 55 on the side wall of the sliding hole 53 make it convenient for the manufacturer to rotatably connect the sliding sleeve 5 with the second connecting rod 211 through the fastener, facilitate the stable installation of the sliding sleeve 5 and the second connecting rod 211, and facilitate the assembly and production of the camper.

[0053] The sliding sleeve 5 described in the present invention includes two sleeves 51 arranged at intervals, and the two sleeves 51 are fixedly connected by a fixing rod 52. The sleeves 51 are respectively slidably connected to the pull rod 4. The two sleeves 51 arranged at intervals facilitate the stable connection between the sliding sleeve 5 and the pull rod 4, reduce deflection or shaking during use, and are conducive to the stable sliding of the sliding sleeve 5 on the pull rod 4.

[0054] The pull rod 4 in this embodiment is arranged vertically, and the two second connecting rods 211 on the second folding unit 21 are distributed in an isosceles triangle with the pull rod 4, thereby preventing the pull rod 4 from swinging to both sides during the unfolding or folding of the two second connecting rods 211 on the second folding unit 21. This structure can prevent the pull rod 4 from being deflected during the unfolding or folding of the camper and affecting the unfolding or folding of the camper, thereby facilitating the unfolding and folding of the camper and making it easier for users to use.

[0055] A third hinge hole 43 is provided on the upper part of the rod body 41, a first hinge hole 213 is provided on a second connecting rod 211, and a second hinge hole 214 is provided on the other second connecting rod 211. The first hinge hole 213 and the second hinge hole 214 are vertically distributed, and the second hinge hole 214 is provided between the first hinge hole 213 and the limit sleeve 42. The fastener passes through the first hinge hole 213 and the third hinge hole 43 and rotatably connects the pull rod 4 to the second connecting rod 211. The fastener passes through the countersunk hole 55 and the second hinge hole 214 and rotatably connects the sliding sleeve 5 to the other second connecting rod 211.

[0056] The end frame 3 includes a third folding unit 31 arranged between the vertical poles 32, and a sliding sleeve 33 is slidably arranged on the vertical pole 32. The third folding unit 31 includes two third connecting rods 311 hinged in an X shape, one third connecting rod 311 is rotatably connected to the vertical pole 32, and the other third connecting rod 311 is rotatably connected to the sliding sleeve 33. In addition, a second connecting rod 211 in the second folding unit 21 is rotatably connected to the vertical pole 32. The sliding sleeve 33 can drive the other second connecting rod 211 in the second folding unit 21 to move, so that the second folding unit 21 and the third folding unit 31 can be folded synchronously. The arrangement of the sliding sleeve 33 facilitates the synchronous folding of the second folding unit 21 and the third folding unit 31, facilitates the unfolding and folding of the camper, and is convenient for users to use.

[0057] In this embodiment, the upper and lower ends of the vertical rod 32 are respectively fixed with an upper connecting end 321 and a lower connecting end 324, the upper connecting end 321 is provided with a first hinge groove 322 adapted to the third connecting rod 311 and a third hinge groove 323 adapted to the second connecting rod 211, the sliding sleeve 33 is provided with a second hinge groove 331 adapted to another third connecting rod 311 on the third folding unit 31, and the lower connecting end 324 is provided with a connecting groove 325 adapted to the first support connecting rod 112.

[0058] Preferably, the end frame 3 includes two groups of third folding units 31, the two third connecting rods 311 on the two groups of third folding units 31 are respectively rotatably connected, the two vertical rods 32 are provided with a first hinge groove 322, the sliding sleeve 33 is provided with a second hinge groove 331 adapted to the second connecting rod 211, and the two third connecting rods 311 on one group of third folding units 31 are relatively bent, so that the first hinge grooves 322 on the two vertical rods 32 are arranged relative to each other, and the second hinge grooves 331 on the sliding sleeves 33 on the two vertical rods 32 are arranged relative to each other. 31 are arranged relative to each other, and the relatively bent third link 311 facilitates the relative arrangement of the first hinge groove 322 and the second hinge groove 331 on both sides of the end frame 3, which is convenient for the manufacturer to assemble the camper. In addition, this structure is conducive to reducing the types of parts of the camper and the types of molds for the camper, thereby reducing the production cost of the camper. In the utility model, a bending portion 312 is provided on the third link 311, and the bending portion 312 on the third link 311 on the same third folding unit 31 is bent toward the other third link 311.

[0059] In this embodiment, two auxiliary connecting rods 212 are rotatably provided on the sliding sleeve 33, and a fourth hinge groove 332 adapted to the auxiliary connecting rod 212 is provided on the sliding sleeve 33. The two auxiliary connecting rods 212 are respectively rotatably connected to the two second connecting rods 211 in the second folding unit 21 to form a four-bar mechanism. The arrangement of the two auxiliary connecting rods 212 facilitates the flexible expansion and folding of the second folding unit 21, reduces the jamming of the second folding unit 21 during use, facilitates the expansion and folding of the camper, and is convenient for users.

[0060] The connecting seat 111 is provided with a storage groove 119, and the storage groove 119 is provided with a traction portion 115. The traction portion 115 can be used to pull the connecting seat 111 upward, so that the first folding unit 11 is relatively folded. The setting of the traction portion 115 in this structure facilitates the user to quickly control the folding of the base frame 1, which is convenient for the user to use. The setting of the storage groove 119 facilitates the hidden storage of the traction portion 115, thereby preventing the traction portion 115 from protruding from above the base frame 1 and affecting the user's placement of items in the camper.

[0061] In this embodiment, four movable grooves 1111 are provided on the lower side of the connecting seat 111, and one end of the first supporting link 112 and the second supporting link 113 are respectively rotated and set in a movable groove 1111, and a tightening wall 1112 is provided on the upper side of the movable groove 1111. When the base frame 1 is unfolded, the first supporting link 112 and the second supporting link 113 are respectively pressed against the tightening wall 1112.

[0062] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A camping vehicle body, comprising a vehicle body and wheels, wherein a base frame (1) is provided at the bottom of the vehicle body, foldable end frames (3) are provided at the front and rear ends of the vehicle body, upright poles (32) are provided on both sides of the end frames (3), and foldable side frames (2) are provided on the left and right sides of the vehicle body, wherein both ends of the side frames (2) are connected to the upright poles (32) on the two end frames (3), and the side frames (2) and the end frames (3) are folded together so that the upright poles (32) are gathered together. The invention is characterized in that: The base frame (1) includes two groups of first folding units (11), the two groups of first folding units (11) are respectively connected to the two end frames (3), the first folding units (11) include a connecting seat (111), the lower side of the connecting seat (111) is rotatably provided with two first supporting links (112) and two second supporting links (113), the two first supporting links (112) are respectively rotatably connected to the vertical rods (32) on both sides of the end frame (3), and the second supporting links (113) on the two first folding units (11) are cross-stacked to form an X shape, so that one first folding unit (11) can support the other first folding unit (11), so that the two first folding units (11) can jointly support the items in the vehicle body; The side frame (2) is provided with a pull rod (4) connected to the first folding unit (11), and the side frame (2) can pull the second supporting link (113) through the pull rod (4).

2. The camper body according to claim 1, characterized in that: The middle portion of the second supporting link (113) is bent downward and a swing groove (114) is formed on the upper side of the second supporting link (113). The second supporting link (113) on the other first folding unit (11) passes through the swing groove (114) and is connected to the pull rod (4). The swing groove (114) can support the second supporting link (113).

3. The camper body according to claim 1, characterized in that: A guide sleeve (116) is slidably provided on the pull rod (4), a limiting portion for limiting the movement range of the guide sleeve (116) is provided on the pull rod (4), a guide hole (117) adapted to the pull rod (4) is provided on the guide sleeve (116), and the guide sleeve (116) is rotatably connected to the second supporting link (113).

4. The camper body according to claim 1, characterized in that: The side frame (2) includes two groups of second folding units (21), and the second folding units (21) include two second connecting rods (211) hinged in an X shape. The two second connecting rods (211) on the two groups of second folding units (21) are respectively rotatably connected. The pull rod (4) is respectively provided on the two groups of second folding units (21), and a sliding sleeve (5) is slidably provided on the pull rod (4). The pull rod (4) is rotatably connected to a second connecting rod (211) on the second folding unit (21), and the sliding sleeve (5) is rotatably connected to another second connecting rod (211) on the second folding unit (21). The two second connecting rods (211), the sliding sleeve (5) and the pull rod (4) are combined to form a four-bar slider mechanism.

5. The camper body according to claim 4, characterized in that: The pull rod (4) is arranged vertically, and the two second connecting rods (211) on the second folding unit (21) and the pull rod (4) are distributed in an isosceles triangle, thereby preventing the pull rod (4) from swinging to both sides during the unfolding or folding process of the two second connecting rods (211) on the second folding unit (21).

6. The camper body according to claim 4, characterized in that: The sliding sleeve (5) is provided with a sliding hole (53) adapted to the pull rod (4), and a through hole (54) and a countersunk hole (55) are provided on the side wall of the sliding hole (53). The countersunk hole (55) is provided in the extension direction of the through hole (54). A fastener can pass through the through hole (54) and be installed in the countersunk hole (55), so that the fastener can rotatably connect the sliding sleeve (5) to the second connecting rod (211).

7. The camper body according to claim 6, characterized in that: The sliding sleeve (5) comprises two sleeves (51) spaced apart from each other. The two sleeves (51) are fixedly connected via a fixing rod (52). The sleeves (51) are respectively slidably connected to the pull rods (4).

8. The camper body according to claim 4, characterized in that: The end frame (3) includes a third folding unit (31) arranged between the vertical rods (32), a sliding sleeve (33) is slidably arranged on the vertical rods (32), and the third folding unit (31) includes two third connecting rods (311) hinged in an X shape, one third connecting rod (311) is rotatably connected to the vertical rod (32), and the other third connecting rod (311) is rotatably connected to the sliding sleeve (33), and a second connecting rod (211) in the second folding unit (21) is rotatably connected to the vertical rod (32), and the sliding sleeve (33) can drive the other second connecting rod (211) in the second folding unit (21) to move, so that the second folding unit (21) and the third folding unit (31) can be folded synchronously.

9. The camper body according to claim 8, characterized in that: The end frame (3) comprises two groups of third folding units (31), the two third connecting rods (311) on the two groups of third folding units (31) are respectively rotatably connected, the two vertical rods (32) are each provided with a first hinge groove (322), the sliding sleeve (33) is provided with a second hinge groove (331) adapted to the second connecting rod (211), and the two third connecting rods (311) on one group of third folding units (31) are relatively bent, so that the first hinge grooves (322) on the two vertical rods (32) are relatively arranged, and the second hinge grooves (331) on the sliding sleeves (33) on the two vertical rods (32) are relatively arranged.

10. The camper body according to claim 9, characterized in that: Two auxiliary connecting rods (212) are rotatably provided on the sliding sleeve (33), and the two auxiliary connecting rods (212) are rotatably connected to the two second connecting rods (211) in the second folding unit (21) to form a four-bar mechanism.

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