Folding structure of camp vehicle

Abstract

The folding structure comprises a frame unit, a pull handle assembly, a push handle assembly and a bottom wheel assembly, and the frame unit is composed of a folding base mechanism, a lifting cross bar mechanism, a front upper cross bar assembly, a rear upper cross bar assembly, a right front vertical rod, a left front vertical rod, a left rear vertical rod and a right rear vertical rod. The folding base mechanism comprises a connecting middle seat, a connecting iron sheet, a middle sliding piece, a middle sliding fixing rod, an upper connecting rod, a lower connecting rod and a lifting zipper piece, and the middle sliding fixing rod is fixedly installed in a through hole formed in the center of the connecting middle seat. The upper half part of the frame is of a double-rod structure instead of a cross-shaped structure, so that the structure is compact, the structural space is reduced, sliding can be realized, the side guardrails are opened, the use is convenient, the folding is compact, and the occupied space is small, and the increasingly improved equipment requirements and use experience of modern outdoor enthusiasts are met.

Description

Technical Field

[0001] The present invention relates to the technical field of camping vehicles, in particular to a folding structure of a camping vehicle. Background Art

[0002] With the booming development of outdoor leisure activities such as camping and self-driving tours, the demand for portable equipment is growing. Camping vehicles, also known as campervans and folding trailers, as important means of transportation, have the core value of providing convenient transportation capabilities and can be quickly folded and stored when not in use, saving valuable vehicle space and home storage space.

[0003] The ideal campervan must strike a balance across multiple dimensions: First, ease of folding is crucial; cumbersome folding steps significantly diminish the user experience, especially in outdoor environments or when packing up quickly. Users expect to fold the entire frame with as few movements as possible. Second, functional versatility is key to enhancing practicality.

[0004] For example, height-adjustable siderails can accommodate items of varying sizes; an expandable bottom increases loading capacity; stability and safety during movement and parking are crucial. A reliable braking system, especially on sloped surfaces, and a stable wheel structure are essential for safe use, balancing the flexible steering of universal wheels with the linear stability of fixed wheels. Finally, the compactness of the folded-down version directly impacts its portability, and the structural design needs to be optimized to minimize storage volume.

[0005] In the existing camping car technical solutions, most of them focus on the use of a cross-link structure, while the camping car folding structure of the present application has a chassis supported by a four-rod structure and can be folded in two directions. The upper part of the frame uses a double-rod structure instead of a cross structure. This structure is compact and reduces the structural space. It can slide to open the side guardrails for easy use. It folds compactly and does not take up space, thereby meeting the increasingly improved equipment needs and usage experience of modern outdoor enthusiasts. Summary of the Invention

[0006] The folding structure of a camping vehicle is characterized in that the folding structure is convenient to use and can be used for camping vehicles with high speed rotating shafts. There are a right front vertical rod, a left front vertical rod, a left rear vertical rod and a right rear vertical rod, the upper and lower ends of the right front vertical rod and the left front vertical rod are respectively fixedly installed with a front upper connecting piece and a front lower connecting piece, the upper and lower ends of the left rear vertical rod and the right rear vertical rod are respectively fixedly installed with a rear lower connecting piece and a rear upper connecting piece, the rear lower connecting piece and the front lower connecting piece are respectively rotatably connected to the other end of the upper connecting rod through a pin shaft towards the top of one end connected to the middle seat, and the rear lower connecting piece and the front lower connecting piece are respectively rotatably installed with a lower connecting rod through a pin shaft towards the bottom of one end connected to the middle seat. The other end of the lower connecting rod is rotatably connected to the middle part of the connecting iron sheet through a pin shaft; a lifting horizontal bar mechanism is respectively provided between the left front vertical rod and the left rear vertical rod and between the right front vertical rod and the right rear vertical rod; the bottom of the rear lower connecting piece and the front lower connecting piece are respectively provided with a bottom wheel assembly, and a pull handle assembly is provided on the opposite side between the front lower connecting pieces; a front upper horizontal bar assembly is provided on the opposite side between the front upper connecting pieces, a rear upper horizontal bar assembly is provided on the opposite side between the rear upper connecting pieces, and a push handle assembly is provided on the top of the rear upper connecting piece.

[0007] The folding structure of the camping vehicle of the present invention is an optimal technical solution for the folding structure of the camping vehicle, the lifting crossbar mechanism includes an upper connecting rod, a lower connecting rod, a vertical rod connecting piece, an intermediate connecting piece and a sliding button. The intermediate connecting piece is provided with two vertical rod connecting pieces, and the intermediate connecting piece is respectively provided with a vertical rod connecting piece at the left and right ends of the intermediate connecting piece, and the vertical rod connecting piece is slidably mounted in a sliding groove provided on the side opposite to the left front vertical rod and the left rear vertical rod and the side opposite to the right front vertical rod and the right rear vertical rod. The middle of the vertical rod connecting piece is respectively provided with a sliding button that can be movably plugged into the front upper connecting piece and the rear upper connecting piece. The top and bottom of one end of the vertical rod connecting piece are respectively rotatably mounted on the upper connecting rod and the lower connecting piece by a pin shaft relative to the top of one end of the intermediate connecting piece, and the other end of the lower connecting piece is respectively rotatably connected to the pin shaft provided at the bottom inner side of the intermediate connecting piece. The long slot provided at the other end of the upper connecting rod is respectively slidably connected to the pin shaft provided at the top inner side of the intermediate connecting piece; the sliding button is composed of a button compartment, a button The lock block is provided with a first locking block, a first trapezoidal guide block, a second trapezoidal guide block and a first return spring, the button compartments are respectively arranged inside the vertical rod connecting pieces, and the button compartments are respectively slidably installed with locking blocks, one end of the locking blocks respectively passes through the through slots opened on one side of the vertical rod connecting piece and is movably plugged into the slots provided on the inner sides of the front upper connecting piece and the rear upper connecting piece, and the locking blocks and the slots provided in the middle and bottom of the slide grooves on the opposite sides of the left front vertical rod and the left rear vertical rod and the opposite sides of the right front vertical rod and the right rear vertical rod are located in the same central axis, the locking blocks are respectively arranged inside the vertical rod connecting pieces, and the locking blocks are respectively arranged inside the vertical rod connecting pieces, and the locking blocks are respectively arranged inside the vertical rod connecting pieces, and the slots provided in the middle and bottom of the slide grooves on the opposite sides of the left front vertical rod and the left rear vertical rod and the right front vertical rod and the right rear vertical rod are located in the same central axis, and the locking blocks are respectively arranged inside the vertical rod connecting pieces ... A first return spring is provided in the blind hole opened at the other end of the locking block, and the other end of the first return spring is fixedly connected to the inner wall of the button compartment, and a trapezoidal guide block 1 and a trapezoidal guide block 2 are respectively provided on the upper and lower sides of the locking block, and the inclined surfaces between the trapezoidal guide block 1 and the trapezoidal guide block 2 are slidingly connected, and the trapezoidal guide block 2 is fixedly connected to the locking block, and the other end of the trapezoidal guide block 1 is fixedly connected to the button block, and the button blocks are slidably installed in the button grooves provided on the vertical rod connecting piece and the button compartment.

[0008] As an optimal technical solution for the folding structure of a camping vehicle of the present invention, the front upper crossbar assembly includes a front intermediate connector, a front upper link and a front lower link. The front intermediate connector is arranged between the front upper connecting parts, and the left and right ends of the front intermediate connector are respectively symmetrically provided with a front upper link and a front lower link. One end of the front upper link and the front lower link are respectively rotatably connected to the front upper connecting part through a pin shaft, and the long groove provided at the other end of the front upper link is respectively slidably connected to the pin shaft provided at the top inner side of the front intermediate connector, and the other end of the front lower link is respectively rotatably connected to the pin shaft provided at the bottom inner side of the front intermediate connector.

[0009] As a preferred technical solution for the folding structure of a camping car of the present invention, the handle assembly includes a handle, a handle telescopic button, a pull rod, a pull rod intermediate connector, a handle lower connector, a damping rotary seat and a latch assembly, the pull rod intermediate connector is arranged in the middle between the right front vertical rod and the left front vertical rod, the pull rod intermediate connector is in a "triangle" structure, a pull rod is slidably installed in the inverted "T"-shaped through hole arranged in the middle of the pull rod intermediate connector, a handle is fixedly installed on the top of the pull rod, and a handle is slidably installed in the sliding hole at the bottom inner side of the pull handle. The telescopic button of the pull handle is connected to the latch assembly set in the middle of the inner side of the pull rod intermediate connecting piece, and the bottom of the left and right ends of the pull rod intermediate connecting piece are respectively rotatably installed with the pull handle lower connecting rod through the pin shaft, and the other end of the pull handle lower connecting rod is rotatably connected to the damping rotating seat set on the opposite side of the front lower connecting piece through the pin shaft, and the damping rotating seat is rotatably connected to the damping fixed seat fixedly installed on the opposite side of the front lower connecting piece; the latch assembly includes a telescopic button connecting rod, a lock tongue push block, a lock tongue bottom block, a limit blocking ring, a trapezoidal lock Tongue, a third return spring, a ring groove, a trapezoidal push groove and a lock tongue slide groove, the lock tongue bottom block is arranged at the inner bottom of the pull rod, and the bottom of the lock tongue bottom block is fixedly connected to the bottom of the pull rod through a limit blocking ring, the limit blocking ring is movably mounted on the bottom of the inverted "T"-shaped through hole in the middle of the intermediate connecting part of the pull rod, and the limit blocking ring limits and blocks the pull rod, a lock tongue push block is slidably installed in the guide groove arranged on one side of the lock tongue bottom block, the inner top inclined surface of the trapezoidal push groove arranged at the bottom of the lock tongue push block is in contact with the trapezoidal lock tongue arranged in the middle of the lock tongue bottom block The middle inclined surface is slidingly connected, and the trapezoidal lock tongue is slidably installed in the lock tongue slide groove provided in the middle of the lock tongue bottom block. One end of the trapezoidal lock tongue passes through the through hole provided on the pull rod and is movably plugged into the annular groove provided in the middle of the inner side of the intermediate connecting piece of the pull rod. The other end of the trapezoidal lock tongue is fixedly installed with a third return spring, and the other end of the third return spring is fixedly connected to the inner wall of the pull rod. A telescopic button connecting rod is fixedly installed on the top of the lock tongue push block, and the top of the other end of the telescopic button connecting rod is fixedly connected to the bottom of the telescopic button of the handle.

[0010] The folding mechanism is configured to move the handlebars 200 so that the folding mechanism can be adjusted so that the folding mechanism can move relative to the left and right handles of the vehicle. The folding mechanism can be adjusted so that the folding mechanism can move relative to the left and right handles of the vehicle. The cam is secured to the outside of the gear train with a spring which is secured to the outside of the gear train and is adapted to engage the first and second gears of the gear train when the cam is engaged.

[0011] As a preferred technical solution for the folding structure of a camping car of the present invention, the rear upper cross bar assembly includes a cross rod, an upper cross member connector, a lower cross member connector, a sliding rod, a plug button, and a T-shaped plug block. The cross rod is connected by a pin in the middle of two rods to form a cross structure. The tops of the left and right ends of the cross rod are respectively rotatably installed with the upper cross member connectors through the pin shafts. The T-shaped slots provided in the middle of one side of the upper cross bar assembly of the cross member connector are respectively movably plugged into the T-shaped plug block provided in the middle of the rear upper connector, and the upper cross member connectors are movably plugged into the rear upper connector through the plug buttons. The bottoms of the upper cross member connectors are respectively fixedly installed with sliding rods, and the outer sides of the sliding rods are slidably installed The lower connecting head of the installed cross piece is rotatably connected to the left and right end bottoms of the cross cross rod through pins, and the bottom of the sliding rod is rotatably connected to the rear lower connecting piece through pins; the plug button includes a push block button, a plug button slot, a plug lock tongue, a limit slot and a limit rod, and the plug button slots are respectively arranged on the top of the cross piece upper connecting head, and the inner sides of the plug button slots are respectively slidably installed with plug lock tongues, and the plug lock tongues are movably plugged into the slots opened on one side of the rear upper connecting piece, and the tops of the plug lock tongues are respectively fixedly connected to the push block button arranged above the upper connecting head of the cross piece, and the limit rods are respectively slidably installed in the limit slots arranged in the middle of the plug lock tongues, and the limit rods are respectively fixedly installed on the inner sides of the plug button slots.

[0012] The folding structure of the camping vehicle of the present invention is an optimal technical solution for the folding structure of the camping vehicle, the bottom wheel assembly includes a rear wheel assembly and a front wheel assembly, the rear wheel assembly is a directional wheel, and the rear wheel assembly is respectively arranged at the bottom of the left rear vertical rod and the right rear vertical rod, the rear wheel assembly includes a rear wheel base, a brake pedal fixing part, a brake pedal, a brake line, a rear wheel brake assembly, a rear wheel axle assembly, a rear wheel base side plate, a rear wheel, a brake disc frame, a fixing connecting rod, an arc-shaped rotation groove, an arc-shaped push-up groove, a brake line clamping groove, a brake line fixing tube, a rear wheel brake assembly push-up hole and a rear wheel axle hole, the rear wheel base is respectively fixedly mounted on the bottom of the left rear vertical rod and the right rear vertical rod on the opposite side of the rear wheel base, the brake pedal fixing part is respectively fixedly mounted on the opposite side of the rear wheel base, and the rear wheel base side plate is respectively fixedly mounted on the other side of the rear wheel base, and a rear wheel axle assembly is provided in the middle between the rear wheel base side plate and the rear wheel base, and the rear wheel axle assembly includes a rear wheel axle The axle lever of the upper right corner is connected to the bottom edge of the gear shift knob, and the upper right corner has a plurality of springs connected to the springs, and the plurality of springs are connected to the plurality of gear shift knobs.The outer side of the brake pedal fixing part is rotatably installed with a brake pedal, and the arc-shaped rotating grooves at the upper and lower ends of the middle part of the brake pedal are respectively slidably connected with the fixing connecting rods at the upper and lower ends of the side of the brake pedal fixing part. A brake wire is arranged above the brake pedal, and the left and right ends of the brake wire are respectively inserted into the brake wire fixing tube connected to the rear wheel base. The left and right ends of the wire core arranged inside the brake wire are respectively fixedly installed with brake wire clamps, and the brake wire clamps are respectively clamped in the brake wire clamping grooves arranged at one end inside the brake pedal. The other end of the inside of the brake pedal is respectively provided with an arc-shaped pushing groove, and the inner bottom surface of the arc-shaped pushing groove is inclined. The front end of the arc-shaped pushing groove relative to the inside of the rear wheel base is respectively provided with a rear wheel brake assembly, and the rear wheel brake assembly is respectively slidably installed in the rear wheel brake assembly pushing hole arranged at one end inside the rear wheel base. The rear wheel brake assembly includes a pushing rod sleeve, an anti-slip The brake rod is provided with a first compression spring and a second compression spring, wherein the push rod sleeve is respectively slidably mounted inside the push hole of the rear wheel brake assembly, one end of the push rod sleeve is provided with an arc-shaped end portion which is respectively in contact with the inner bottom surface of the arc-shaped push groove, the other end of the push rod sleeve is respectively provided with a brake rod, and the anti-slip pin provided on the outer side of the brake rod is slidably connected with the anti-slip groove provided in the middle of the push rod sleeve, a first compression spring is provided between the brake rod and the inner side of the push rod sleeve, the other end of the brake rod passes through the through hole provided at one end of the side plate of the rear wheel base and is movably plugged into the brake socket provided in an array of equidistant circles around one side of the brake disc frame, the outer side of the brake rod is sleeved with a second compression spring, the left and right ends of the second compression spring are respectively in contact with the outer side of the anti-slip pin and the inner side plate of the rear wheel base, the front wheel assembly is a universal wheel, and the front wheel assemblies are respectively mounted on the bottom of the front lower connecting member.

[0013] As a preferred technical solution of the folding structure of a camping vehicle of the present invention, the front wheel assembly includes a front wheel seat, a wheel fork, a wheel lock assembly, a brake pedal, a brake plug, a wheel side brake gear ring, a front wheel, a brake slot and a brake release slot. The front wheel seats are respectively arranged at the bottom of the front lower connecting member, and the top of the front wheel seat is rotatably connected to the front lower connecting member through the wheel lock assembly. The wheel lock assembly consists of a guide bar cylinder, a lock ring, an inner trapezoidal push groove, a push bar, a guide bar, a guide bar jack, a shaft rod and a guide bar groove. The guide bar The cylinder parts are respectively fixedly installed on the inner bottom of the front lower connecting part, the shaft rod arranged in the center of the guide cylinder part is rotatably connected to the shaft hole arranged in the center of the top of the front wheel seat, and a locking ring is respectively provided between the guide cylinder part and the front wheel seat, and the locking ring is rotatably installed on the outer bottom of the guide cylinder part, and an inner trapezoidal push groove is respectively provided at one end of the outer side of the locking ring, and a push strip is respectively provided above the inner trapezoidal push groove, and the bottom of the push strip is a trapezoidal structure, and the bottom of the push strip slides with the inclined surface of the inner trapezoidal push groove The bottom of the front wheel seat is respectively integrally provided with a wheel fork, and the bottom of the wheel fork is respectively rotatably mounted on the front wheel seat, and the front wheel is respectively integrally connected with the wheel side brake gear ring at the outer center of the wheel fork. The extension block provided in the middle of one side of the wheel fork is respectively rotatably mounted on the brake pedal through a pin shaft, and the brake pedal is respectively integrally connected with a brake plug block at one end of the wheel side brake gear ring near the wheel side. The hemispherical protrusions provided on the inner side of the brake pedal are respectively movably engaged with the brake release slot holes provided in the middle of the outer side of the wheel fork, and the outer bottom of the wheel fork is respectively provided with a brake slot hole.

[0014] The locking lever is secured to the cam face by a spring, and the locking lever is secured to the cam face by a spring, and the locking lever is secured to the cam face by a spring.

[0015] As an optimal technical solution for the folding structure of a camping vehicle of the present invention, it also includes a shed pole, two of which are provided and have an inverted "U" shape. The shed poles are symmetrically installed in the shed pole holes provided on the top of the front upper connecting piece and the rear upper connecting piece.

[0016] The beneficial effects of the present invention are as follows: the present invention controls the core locking of the folding base mechanism by lifting the lock member, and a single lifting action can unlock the middle sliding member, which drives the middle seat to move upward and links the upper connecting rod, the lower connecting rod, the connecting iron sheet and the front and rear vertical rods to drive the entire frame, including the front and rear lower connecting members, to gather and fold toward the center quickly and synchronously, which significantly simplifies the folding steps and improves the convenience and efficiency of operation; the lifting crossbar mechanism controls the extension and contraction of the locking block by a sliding button, which can be easily unlocked and slid up and down along the vertical rod slide groove; using the multiple slots preset on the slide groove, the user can fix the crossbar at an appropriate height according to needs, and the lock is automatically reset by the spring, meeting the needs of different loading heights or usage habits, thereby enhancing the adaptability and functionality of the camping vehicle;

[0017] The handle telescopic button drives the latch assembly and the damping rotation function. The user can adjust the height of the handle with one hand by pressing the button, and smoothly rotate the handle to a comfortable angle and maintain stability under the action of damping; the push handle assembly adopts a unique gear latch structure. Pressing the button drives the latch gear to disengage, so that the push handle and the push rod can be easily folded and retracted, and can be locked after unfolding; the rear upper crossbar assembly adopts a combination structure of cross rods and slide rods; by operating the plug button to release the plug-in fit between the upper connector of the cross piece and the rear upper connector, the entire assembly can be pushed, and the bottom of the slide rod can be rotated around the rear lower connector, effectively expanding the support area of ​​the bottom of the camping vehicle and enhancing the ability to carry large items;

[0018] The rear wheel assembly adopts a linked brake design. When one of the brake pedals is stepped on, the brake mechanisms on both sides are synchronously driven through the brake cable, pushing the brake rod into the brake disc frame to achieve reliable braking. The built-in spring cushions the impact and assists in resetting. The front wheel assembly is a universal wheel. Its lock wheel assembly controls the insertion or withdrawal of the guide bar into the guide bar socket by toggling the lock ring to achieve directional locking or universal rotation of the wheel seat. It is also equipped with an independent gear ring brake mechanism, so that the bottom wheel assembly takes into account the mobility flexibility, directional stability and parking safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the structure of the lifting horizontal bar mechanism of the present invention;

[0022] Figure 4 It is a partial cross-section and exploded structural diagram of the lifting rail mechanism of the present invention;

[0023] Figure 5 Schematic diagram of the exploded structure of the push handle assembly of the present invention Figure 1 ;

[0024] Figure 6 Schematic diagram of the exploded structure of the push handle assembly of the present invention Figure 2 ;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the handle assembly of the present invention;

[0026] Figure 8 A partial cross-section and exploded structural diagram of the mortise lock assembly of the present invention;

[0027] Figure 9 This is a schematic diagram of the partial explosion structure of the mortise lock assembly of the present invention;

[0028] Figure 10 Schematic diagram of the explosion structure of the push button of the present invention Figure 1 ;

[0029] Figure 11 Schematic diagram of the explosion structure of the push button of the present invention Figure 2 ;

[0030] Figure 12 Schematic diagram of the cross-sectional structure of the lifting lock of the present invention;

[0031] Figure 13 Schematic diagram of the explosion structure of the lifting lock of the present invention Figure 1 ;

[0032] Figure 14 Schematic diagram of the explosion structure of the lifting lock of the present invention Figure 2 ;

[0033] Figure 15 Schematic diagram of the explosion structure of the front wheel assembly of the present invention Figure 1 ;

[0034] Figure 16 Schematic diagram of the explosion structure of the front wheel assembly of the present invention Figure 2 ;

[0035] Figure 17 Schematic diagram of the explosion structure of the front wheel assembly of the present invention Figure 3 ;

[0036] Figure 18 This is a schematic diagram of the wheel fork structure of the present invention;

[0037] Figure 19 Schematic diagram of the exploded structure of the rear wheel assembly of the present invention Figure 1 ;

[0038] Figure 20 Schematic diagram of the exploded structure of the rear wheel assembly of the present invention Figure 2 ;

[0039] Figure 21 This is a schematic diagram of the partial explosion structure of the rear wheel assembly of the present invention;

[0040] Figure 22 This is a schematic diagram of the partially enlarged structure of point A of the present invention;

[0041] Figure 23 This is a schematic diagram of the folding structure of the frame unit of the present invention;

[0042] Figure 24 Schematic diagram of the adjustment structure of the lifting horizontal bar mechanism of the present invention Figure 1 ;

[0043] Figure 25 Schematic diagram of the adjustment structure of the lifting horizontal bar mechanism of the present invention Figure 2 .

[0044] In the figure: 1. Folding base mechanism; 101. Connecting middle seat; 102. Connecting iron sheet; 103. Middle sliding member; 104. Middle sliding fixing rod; 105. Upper connecting rod; 106. Lower connecting rod; 107. Lifting lock member; 1071. Fixed guide rod; 1072. Pull rod groove; 1073. Lifting rod; 1074. Draw rope connecting hole; 1075. Trapezoidal guide groove; 1076. Trapezoidal latch tongue; 1077. Fourth return spring; 1078. Latch tongue guide groove; 2. Lifting crossbar mechanism; 201. Upper connecting rod; 202. Lower connecting rod; 203. Vertical rod connecting member; 204. Middle connecting member; 205. Sliding button; 2051. Button compartment; 2052. Button block; 2053. Trapezoidal guide block 1; 205 4. Latch block; 2055. Trapezoidal guide block 2; 2056. First return spring; 3. Front upper crossbar assembly; 301. Front middle connector; 302. Front upper connecting rod; 303. Front lower connecting rod; 4. Handle assembly; 401. Handle; 402. Handle telescopic button; 403. Pull rod; 404. Pull rod middle connector; 405. Handle lower connecting rod; 406. Damping swivel seat; 407. Latch assembly; 4071. Telescopic button connecting rod; 4072. Lock tongue push block; 4073. Lock tongue bottom block; 4074. Limit blocking ring; 4075. Trapezoidal lock tongue; 4076. Third return spring; 4077. Ring groove; 4078. Trapezoidal push groove; 4079. Lock tongue slide groove; 5. Handle assembly; 501. Handle unlocking 1. Button; 5011. Rotating box 1; 5012. Rotating box 2; 5013. Inner partition; 5014. Button component; 5015. Lock gear; 5016. Guide rod; 5017. First inner tooth; 5018. Second inner tooth; 5019. Second return spring; 502. Right push handle; 503. Left push handle; 504. Push handle joint; 505. Push rod; 506. Push rod joint; 507. Upper joint of vertical rod; 508. Push rod adjustment button; 6. Rear upper horizontal bar assembly; 601. Cross rod; 602. Upper connector of cross piece; 603. Lower connector of cross piece; 604. Sliding rod; 605. Plug button; 6051. Push block button; 6052. Plug button slot; 6053. Plug lock tongue; 6054. Limiting slot; 6055, limiting rod; 606, T-shaped plug; 7, bottom wheel assembly; 701, rear wheel assembly; 7011, rear wheel base; 7012, brake pedal fixing piece; 7013, brake pedal; 7014, brake cable; 70141, cable core; 70142, brake cable clamp; 7015, rear wheel brake assembly; 70151, ejector rod sleeve; 70152, anti-slip groove; 70153, brake plug; 70154, anti-slip pin; 70155, first compression spring; 70156, second compression spring; 7016, rear wheel axle assembly; 70161, rear wheel axle rod; 70162, axle plate; 70163, third compression spring; 70164, axle plate slot; 7017, rear wheel base side panel;7018, rear wheel; 7019, brake disc frame; 70110, fixing connecting rod; 70111, arc-shaped rotation groove; 70112, arc-shaped push-up groove; 70113, brake cable slot; 70114, brake cable fixing tube; 70115, rear wheel brake assembly push-up hole; 70116, rear wheel axle hole; 702, front wheel assembly; 7021, front wheel seat; 7022, wheel fork; 7023, wheel lock assembly; 70231, guide cylinder; 70232, lock ring; 70233, inner trapezoidal push-up groove; 70234, front wheel seat; 70235, front wheel seat; 70236, front wheel seat; 70237, front wheel seat; 70238, front wheel seat; 70239, front wheel seat; 70240, front wheel seat; 70241, front wheel seat; 70242, front wheel seat; 70243, front wheel seat; 70244, front wheel seat; 70245, front wheel seat; 70246, front wheel seat; 70247, front wheel seat; 70248, front wheel seat; 70249, front wheel seat; 70250, front wheel seat; 70251, front wheel seat; 70252, front wheel seat; 70253, front wheel seat; 70254, front wheel seat; 70255, front wheel seat; 70256, front wheel seat; 70257, front wheel seat; 70258, front wheel seat; 70259, front wheel seat; 70260, front wheel seat; 70261, front wheel seat; 70262, front wheel seat; 7026 0234, push rod; 70235, guide bar; 70236, guide bar socket; 70237, shaft; 70238, guide bar slot; 7024, brake pedal; 7025, brake insert; 7026, wheel-side brake gear ring; 7027, front wheel; 7028, brake slot; 7029, brake release slot; 8, rear lower connector; 9, front lower connector; 10, right front vertical bar; 11, left front vertical bar; 12, left rear vertical bar; 13, right rear vertical bar; 14, front upper connector; 15, rear upper connector; 16, shed pole. DETAILED DESCRIPTION

[0045] Example 1

[0046] like Figures 1 to 25As shown, the present invention discloses a folding structure of a camping car, which adopts a technical solution including a frame unit, a handle assembly 4, a push handle assembly 5 and a bottom wheel assembly 7. The frame unit is composed of a folding base mechanism 1, a lifting crossbar mechanism 2, a front upper crossbar assembly 3, a rear upper crossbar assembly 6, a right front vertical rod 10, a left front vertical rod 11, a left rear vertical rod 12 and a right rear vertical rod 13. The folding base mechanism 1 includes a connecting middle seat 101, a connecting iron sheet 102, an intermediate sliding member 103, an intermediate sliding fixing rod 104, an upper connecting rod 105, a lower connecting rod 106 and a lifting lock 107, which is fixedly installed in a through hole set in the center of the connecting middle seat 101. There is an intermediate sliding fixed rod 104, and an intermediate sliding member 103 is slidably installed on the outer side of the intermediate sliding fixed rod 104. The lifting lock 107 set inside the intermediate sliding fixed rod 104 is movably plugged into the slot set on the intermediate sliding member 103. The lifting lock 107 includes a fixed guide rod 1071, a pull rod slot 1072, a lifting rod 1073, a pull rope connection hole 1074, a trapezoidal guide groove 1075, a trapezoidal latch tongue 1076, a fourth reset spring 1077 and a latch tongue guide groove 1078. The fixed guide rod 1071 is fixedly installed on the inner top of the intermediate sliding fixed rod 104, and a fixed guide rod 1071 is set on the left side. A lifting rod 1073 is slidably installed in the pull rod groove 1072, a pull rope connection hole 1074 is opened on the top of the lifting rod 1073, a trapezoidal guide groove 1075 is provided in the middle of the lifting rod 1073, the inclined surface at the bottom of the trapezoidal guide groove 1075 is slidably connected with the inclined surface in the middle of the trapezoidal latch tongue 1076 provided in the middle of the fixed guide rod 1071, the trapezoidal latch tongue 1076 is slidably installed in the latch tongue guide groove 1078 provided in the middle of the fixed guide rod 1071, one end of the trapezoidal latch tongue 1076 passes through the through groove provided on the middle sliding fixed rod 104 and is movably plugged into the slot in the middle of the middle sliding member 103, and the trapezoidal latch tongue 107 The fourth return spring 1077 provided at the other end is fixedly connected to the inner wall of the intermediate sliding fixed rod 104. By pulling the lifting rod 1073 upward, the lifting rod 1073 slides upward along the rod groove 1072 on the fixed guide rod 1071, so that the inclined surface of the middle part of the trapezoidal locking tongue 1076 is squeezed by the trapezoidal guide groove 1075 in the middle part of the lifting rod 1073, thereby causing the trapezoidal locking tongue 1076 to slide along the inner side of the locking tongue guide groove 1078 and squeeze the fourth return spring 1077, causing the trapezoidal locking tongue 1076 to disengage from the slot in the middle part of the intermediate sliding member 103, thereby releasing the lock of the intermediate sliding member 103.The middle sliding member 103 and the connecting middle seat 101 are in an "X" shape. The four ends of the middle sliding member 103 are respectively rotatably mounted with connecting iron sheets 102 through pins, and the tops of the connecting iron sheets 102 are rotatably connected to the upper connecting rods 105 connected to the four ends of the middle seat 101 through pins. The other ends of the upper connecting rods 105 are respectively provided with the right front vertical rod 10, the left front vertical rod 11, the left rear vertical rod 12 and the right rear vertical rod 13. The upper and lower ends of the right front vertical rod 10 and the left front vertical rod 11 are respectively fixed with the front upper connecting member 14 and the front lower connecting member 9, and the left rear vertical rod 1 2 and the upper and lower ends of the right rear vertical rod 13 are respectively fixedly installed with the rear lower connecting piece 8 and the rear upper connecting piece 15, the rear lower connecting piece 8 and the front lower connecting piece 9 are respectively rotatably connected to the other end of the upper connecting rod 105 through a pin toward the top of one end connected to the middle seat 101, and the rear lower connecting piece 8 and the front lower connecting piece 9 are respectively rotatably installed with a lower connecting rod 106 through a pin toward the bottom of one end connected to the middle seat 101, and the other end of the lower connecting rod 106 is respectively rotatably connected to the middle part of the connecting iron sheet 102 through a pin; A lifting bar mechanism 2 is respectively provided between the vertical bars 13; the lifting bar mechanism 2 comprises an upper connecting rod 201, a lower connecting rod 202, a vertical bar connector 203, an intermediate connector 204 and a sliding button 205, two intermediate connectors 204 are provided, and the intermediate connectors 204 are respectively provided between the left front vertical bar 11 and the left rear vertical bar 12 and between the right front vertical bar 10 and the right rear vertical bar 13, the left and right ends of the intermediate connector 204 are respectively provided with vertical bar connectors 203, and the vertical bar connectors 203 are respectively slidably installed on the opposite side of the left front vertical bar 11 and the left rear vertical bar 12 and the right front vertical bar 10. In the slide groove provided on the side opposite to the vertical rod 10 and the right rear vertical rod 13, the middle of the vertical rod connecting member 203 is respectively provided with a sliding button 205 which can be movably plugged with the front upper connecting member 14 and the rear upper connecting member 15. The top and bottom of one end of the vertical rod connecting member 203 relative to the middle connecting member 204 are respectively rotatably mounted with an upper connecting rod 201 and a lower connecting rod 202 through a pin shaft. The other end of the lower connecting rod 202 is respectively rotatably connected to the pin shaft provided on the inner bottom of the middle connecting member 204. The long groove provided on the other end of the upper connecting rod 201 is respectively slidably connected to the pin shaft provided on the inner top of the middle connecting member 204.The sliding button 205 consists of a button compartment 2051, a button block 2052, a trapezoidal guide block 1 2053, a locking block 2054, a trapezoidal guide block 2055 and a first return spring 2056. The button compartments 2051 are respectively arranged inside the vertical rod connector 203, and the locking blocks 2054 are slidably installed inside the button compartments 2051. One end of the locking block 2054 passes through the through slots opened on one side of the vertical rod connector 203 and is movably plugged into the slots set on the inner sides of the front upper connector 14 and the rear upper connector 15, and the locking block 2054 is movably plugged into the slots set on the inner sides of the front upper connector 14 and the rear upper connector 15. The slots provided in the middle and bottom of the slide grooves on the opposite side of the left front vertical rod 11 and the left rear vertical rod 12 and on the opposite side of the right front vertical rod 10 and the right rear vertical rod 13 are located on the same central axis. A first return spring 2056 is provided in the blind hole opened at the other end of the latch block 2054, and the other end of the first return spring 2056 is fixedly connected to the inner wall of the button compartment 2051. A trapezoidal guide block 1 2053 and a trapezoidal guide block 2 2055 are provided on the upper and lower sides of the latch block 2054, and a trapezoidal guide block 1 2053 and a trapezoidal guide block 2 2055 are provided on the upper and lower sides of the latch block 2054. The inclined sliding connection between them, the trapezoidal guide block 2055 is fixedly connected to the locking block 2054, and the other end of the trapezoidal guide block 1 2053 is fixedly connected to the button block 2052, and the button block 2052 is slidably installed in the button grooves provided on the vertical rod connecting member 203 and the button compartment 2051. When the user presses the button block 2052 of the sliding button 205, the trapezoidal guide block 1 2053 pushes the trapezoidal guide block 2055 to drive the locking block 2054 from the slots provided on the inner sides of the front upper connecting member 14 and the rear upper connecting member 15. The user then moves the lifting rail mechanism 2 up and down along the chute on the side opposite to the left front vertical bar 11 and the left rear vertical bar 12, and the side opposite to the right front vertical bar 10 and the right rear vertical bar 13. The slots provided at the middle and bottom of the chute on the side opposite to the left front vertical bar 11 and the left rear vertical bar 12, and the right front vertical bar 10 and the right rear vertical bar 13 are located on the same central axis. Figure 24 、 Figure 25As shown, the user can adjust the "mid-range or low-range" position of the lifting crossbar mechanism 2 according to usage requirements. After releasing the sliding button 205, the locking block 2054 is reset and locked under the action of the first return spring 2056, so that the locking block 2054 is inserted into the corresponding slot; the bottom of the rear lower connecting member 8 and the front lower connecting member 9 are respectively provided with a bottom wheel assembly 7, and the bottom wheel assembly 7 includes a rear wheel assembly 701 and a front wheel assembly 702. The rear wheel assembly 701 is a fixed wheel, and the rear wheel assembly 701 is respectively provided at the bottom of the left rear vertical rod 12 and the right rear vertical rod 13. The rear wheel assembly 701 includes a rear wheel base 7011, a brake pedal fixing member 7012, a brake pedal 7013, a brake cable 7014, and a rear wheel brake assembly 7015. , rear wheel axle assembly 7016, rear wheel base side plate 7017, rear wheel 7018, brake disc frame 7019, fixing connecting rod 70110, arc-shaped rotating groove 70111, arc-shaped pushing groove 70112, brake cable clamping groove 70113, brake cable fixing tube 70114, rear wheel brake assembly pushing hole 70115 and rear wheel axle axis hole 70116, rear wheel base 7011 are respectively fixedly mounted on the bottom of the left rear vertical rod 12 and the right rear vertical rod 13, the brake pedal fixing parts 7012 are respectively fixedly mounted on the opposite sides of the rear wheel base 7011, the rear wheel base side plate 7017 is respectively fixedly mounted on the other side of the rear wheel base 7011, and the center between the rear wheel base side plate 7017 and the rear wheel base 7011 is fixedly mounted. The rear wheel axle assembly 7016 is provided at the bottom, and the rear wheel axle assembly 7016 includes a rear wheel axle rod 70161, an axle plate 70162, a third compression spring 70163 and an axle plate slot 70164. The axle plate 70162 is provided between the side plate 7017 of the rear wheel base and the rear wheel base 7011, and the bottom of the axle plate 70162 is movably mounted in the axle plate slot 70164 provided on the outer side of the bottom of the rear wheel base 7011. The width of the middle part of the axle plate 70162 is greater than the groove width of the axle plate slot 70164. The outer side of the protrusion provided on the top of the axle plate 70162 is respectively fitted with the third compression spring 70163. The top of the third compression spring 70163 is respectively fixed to the inner side of the rear wheel base 7011. The top is in movable contact, and the elliptical groove provided in the middle of the axle plate 70162 is movably connected with the annular groove opened in the middle of the rear wheel shaft rod 70161 which is rotatably mounted on the rear wheel base 7011 and the rear wheel shaft hole 70116 provided in the center of the rear wheel base 7011. The rear wheel shaft rod 70161 is provided with a rear wheel 7018 and a brake disc frame 7019 at one end away from the rear wheel base 7011. The rear wheel 7018 is integrally connected with the center of one side of the rear wheel base 7011. The middle of the brake disc frame 7019 and the rear wheel 7018 are fixedly connected with the end of the rear wheel shaft rod 70161; the outer side of the brake pedal fixing member 7012 is rotatably mounted with a brake pedal 7013.The arc-shaped rotating grooves 70111 provided at the upper and lower ends of the middle part of the brake pedal 7013 are respectively slidably connected to the fixing connecting rods 70110 provided at the upper and lower ends of the side of the brake pedal fixing part 7012. A brake wire 7014 is provided above the brake pedal 7013. The left and right ends of the brake wire 7014 are respectively inserted into the brake wire fixing tube 70114 connected to the rear wheel base 7011. The left and right ends of the wire core 70141 provided inside the brake wire 7014 are respectively fixedly installed with brake wire clamping blocks 70142, and the brake wire clamping blocks 70142 are respectively clamped in the brake wire clamping groove 70113 provided at one end of the brake pedal 7013. The other end of the brake pedal 7013 is respectively provided with an arc-shaped push rod 70110. The top groove 70112, and the inner bottom surface of the arc-shaped pushing groove 70112 is inclined, and the front end of the arc-shaped pushing groove 70112 relative to the rear wheel base 7011 is respectively provided with a rear wheel brake assembly 7015, and the rear wheel brake assembly 7015 is respectively slidably installed in the rear wheel brake assembly pushing hole 70115 set at one end of the rear wheel base 7011. The rear wheel brake assembly 7015 comprises a pushing rod sleeve 70151, an anti-slip groove 70152, a brake plug rod 70153, an anti-slip pin 70154, a first compression spring 70155 and a second compression spring 70156. The pushing rod sleeve 70151 is respectively slidably installed in the interior of the rear wheel brake assembly pushing hole 70115, and one end of the pushing rod sleeve 70151 is provided with an arc end The two ends of the push rod sleeve 70151 are respectively in movable contact with the inner bottom surface of the arc-shaped push-out groove 70112, and the other end of the push rod sleeve 70151 is respectively provided with a brake plug rod 70153, and the anti-slip pin 70154 provided on the outside of the brake plug rod 70153 is slidably connected with the anti-slip groove 70152 provided in the middle of the push rod sleeve 70151, and a first compression spring 70155 is provided between the brake plug rod 70153 and the inside of the push rod sleeve 70151, and the other end of the brake plug rod 70153 passes through the through hole provided at one end of the rear wheel base side plate 7017 and is movably connected with the brake socket array provided in an equidistant circle around one side of the brake disc skeleton 7019, and the outer sleeve of the brake plug rod 70153 is provided with a second compression spring 70156. The left and right ends of the compression spring 70156 are in active contact with the outer side of the anti-drop pin 70154 and the inner side of the rear wheel base side plate 7017 respectively. The front wheel assembly 702 is a universal wheel, and the front wheel assembly 702 is respectively installed at the bottom of the front lower connecting member 9. When one of the brake pedals 7013 is stepped on, it rotates around the brake pedal fixing member 7012, and the arc-shaped rotating groove 70111 slides along the fixing member connecting rod 70110. At this time, the brake wire clamping groove 70113 inside the brake pedal 7013 pulls the wire core 70141 in the brake wire 7014 through the brake wire clamping block 70142, so that the brake wire clamping block 70142 at the other end of the wire core 70141 synchronously drags the brake wire clamping groove 70113 of the brake pedal 7013 on the other side.The brake pedal 7013 on the other side is forced to rotate in the opposite direction around its brake pedal fixing piece 7012, so that the arc-shaped pushing groove 70112 inside the brake pedal 7013 squeezes the arc-shaped end of the pushing rod sleeve 70151 through the top of the inclined bottom surface, pushing the pushing rod sleeve 70151 to slide along the pushing hole 70115 of the rear wheel brake assembly and compressing the second compression spring 70156. At the same time, the pushing rod sleeve 70151 drives the brake plug rod 70153 to extend outward through the anti-slip groove 70152, overcoming the elastic force of the first compression spring 70155, and finally inserting the brake plug rod 70153 into the brake socket of the brake disc frame 7019, thereby achieving braking of the rear wheel 7018; and when the brake plug rod 70153 is inserted into the brake disc frame 7019 When the brake socket is inserted into the brake disc frame 7019, the elastic force of the first compression spring 70155 keeps the brake rod 70153 in elastic contact with the tendons of the brake disc frame 7019 to avoid rigid impact; when the brake needs to be released, the user steps on the other brake pedal 7013 which rotates in the opposite direction. Under the action of the second compression spring 70156, the arc-shaped end of the push-pull rod sleeve 70151 slides to the bottom of the inclined bottom surface of the arc-shaped push-pull groove 70112 at the same time, so that the brake rod 70153 is disengaged from the socket of the brake disc frame 7019; and under the action of the third compression spring 70163, the elliptical groove of the card shaft plate 70162 can be kept in engagement with the annular groove of the rear wheel axle 70161; the front wheel assembly 702 includes the front wheel 70234, a guide bar 70235, a guide bar jack 70236, a shaft 70237 and a guide bar groove 70238. The guide bar cylinder 70231 is fixedly mounted on the inner bottom of the front lower connecting member 9, and the guide bar jack 70237 is connected to the front lower connecting member 9 through the lock wheel assembly 7023. The shaft rod 70237 provided at the center of the cylinder 70231 is rotatably connected to the shaft hole provided at the center of the top of the front wheel seat 7021. A locking ring 70232 is provided between the guide cylinder 70231 and the front wheel seat 7021, and the locking ring 70232 is rotatably installed on the outer bottom of the guide cylinder 70231. An inner trapezoidal push groove 70233 is provided at one end of the outer side of the locking ring 70232. A push bar 70234 is provided above the inner trapezoidal push groove 70233. The bottom of the push bar 70234 is a trapezoidal structure, and the bottom of the push bar 70234 is slidably connected to the inclined surface of the inner trapezoidal push groove 70233. One end of the push bar 70234 relative to the guide cylinder 70231 is integrally connected with a guide bar 70235.The guide bars 70235 are respectively slidably installed in the guide bar groove 70238 provided at one end of the guide bar cylinder 70231, and the bottom of the guide bar 70235 passes through the through hole opened at the bottom of the guide bar cylinder 70231 and is movably plugged into the guide bar insertion hole 70236 provided at one end of the top of the front wheel seat 7021; the bottom of the front wheel seat 7021 is respectively integrally connected with a wheel fork 7022, and the wheel fork 7022 is an inverted "U"-shaped structure, and the bottom of the wheel fork 7022 is respectively rotatably installed with a front wheel 7027, and the outer center of the front wheel 7027 is respectively integrally connected with a wheel side brake gear ring 7026, and the extension block provided in the middle of one side of the wheel fork 7022 is respectively rotatably installed with a brake pedal 7024 through a pin shaft, and the brake pedal 7024 is a "U"-shaped structure. The end of the vehicle pedal 7024 close to the wheel side brake gear ring 7026 is respectively integrally connected with a brake plug block 7025, and the brake plug block 7025 is respectively movably plugged into the teeth on the wheel side brake gear ring 7026, and the hemispherical protrusions provided on the inner side of the brake pedal 7024 are respectively movably engaged with the brake release slot 7029 provided in the middle part of the outer side of the wheel fork 7022. The outer bottom of the wheel fork 7022 is respectively provided with a brake slot hole 7028. By toggling the lock ring 70232, the inner trapezoidal push groove 70233 squeezes the trapezoidal structure at the bottom of the push bar 70234, so that the push bar 70234 drives the guide bar 70235 to slide upward along the guide bar groove 70238, so that the guide bar 70235 is disengaged from the guide bar plug hole 70236, thereby releasing the front lower connecting piece 9 from the front. The wheel seat 7021 is locked, so that the front wheel seat 7021 can drive the wheel fork 7022 and the front wheel 7027 to rotate; when braking is needed, the brake pedal 7024 is stepped on, and it rotates around the pin shaft so that the brake plug 7025 is stuck between the teeth of the wheel side brake gear ring 7026, and at the same time, the inner hemispherical protrusion of the brake pedal 7024 is disengaged from the brake release slot 7029 to achieve front wheel braking. By sticking the inner hemispherical protrusion of the brake pedal 7024 into the brake slot 7028, the brake is fixed. Conversely, the brake plug 7025 on the brake pedal 7024 is disengaged from the teeth of the wheel side brake gear ring 7026, thereby releasing the brake; and a handle assembly 4 is provided on the opposite side between the front lower connecting member 9; the handle assembly 4 includes a handle 401, a handle telescopic Button 402, pull rod 403, pull rod middle connecting piece 404, handle lower connecting piece 405, damping rotating seat 406 and latch assembly 407, pull rod middle connecting piece 404 is arranged in the middle between right front vertical rod 10 and left front vertical rod 11, pull rod middle connecting piece 404 is "triangle" structure, pull rod 403 is slidably installed in the inverted "T" shaped through hole arranged in the middle of pull rod middle connecting piece 404, pull rod 401 is fixedly installed on the top of pull rod 403, and the pull handle telescopic button 402 slidably installed in the sliding hole at the bottom inside of pull handle 401 is connected to the latch assembly 407 arranged in the middle inside of pull rod middle connecting piece 404, and the bottom of left and right ends of pull rod middle connecting piece 404 are respectively rotatably installed with handle lower connecting piece 405 through pin shaft.The other end of the lower connecting rod 405 of the pull handle is rotatably connected to the damping rotating seat 406 set on the opposite side of the front lower connecting member 9 through a pin shaft, and the damping rotating seat 406 is rotatably connected to the damping fixed seat fixedly installed on the opposite side of the front lower connecting member 9; the latch assembly 407 includes a telescopic button connecting rod 4071, a lock tongue pushing block 4072, a lock tongue bottom block 4073, a limit blocking ring 4074, a trapezoidal lock tongue 4075, a third return spring 4076, an annular groove 4077, a trapezoidal push groove 4078 and a lock tongue sliding groove 4079, the lock tongue bottom block 4073 is set at the inner bottom of the pull rod 403, and the bottom of the lock tongue bottom block 4073 is fixedly connected to the bottom of the pull rod 403 through the limit blocking ring 4074, and the limit blocking ring 407 4 is movably mounted on the bottom of the inverted "T"-shaped through hole in the middle of the pull rod intermediate connector 404, and the limit blocking ring 4074 limits the pull rod 403. A lock tongue push block 4072 is slidably installed in the guide groove provided on one side of the lock tongue bottom block 4073. The top inner slope of the trapezoidal push groove 4078 provided at the bottom of the lock tongue push block 4072 is slidably connected with the middle slope of the trapezoidal lock tongue 4075 provided in the middle of the lock tongue bottom block 4073. The trapezoidal lock tongue 4075 is slidably installed in the lock tongue slide groove 4079 provided in the middle of the lock tongue bottom block 4073. One end of the trapezoidal lock tongue 4075 passes through the through hole provided on the pull rod 403 and is movably plugged into the annular groove 4077 provided in the middle inner side of the pull rod intermediate connector 404. The other end of the trapezoidal lock tongue 4075 is fixed A third return spring 4076 is installed, and the other end of the third return spring 4076 is fixedly connected to the inner wall of the pull rod 403, and a telescopic button connecting rod 4071 is fixedly installed on the top of the lock tongue push block 4072, and the other end top of the telescopic button connecting rod 4071 is fixedly connected to the bottom of the handle telescopic button 402. When the handle telescopic button 402 is pressed, the handle telescopic button 402 pushes the lock tongue push block 4072 through the telescopic button connecting rod 4071, and the trapezoidal push groove 4078 at the bottom of the lock tongue push block 4072 squeezes the trapezoidal lock tongue 4075, so that the trapezoidal lock tongue 4075 slides along the lock tongue slide groove 4079 and squeezes the third return spring 4076. When the trapezoidal lock tongue 4075 withdraws from the annular groove 4077, the pull is released. The rod 403 is locked, and the user can adjust the height of the pull rod at this time; in addition, the damping rotating seat 406 is rotatably connected to the damping fixed seat to realize the horizontal rotation of the handle 401, and the damping rotating seat 406 is rotatably connected to the lower connecting rod 405 of the handle to further provide vertical adjustment, so that the user can adjust the angle of the handle 401 with one hand and keep it stable; the lower connecting rod 405 of the handle is rotatably connected to the middle connecting member 404 of the handle, and power is transmitted through the pin when folding, and the lower connecting rod 405 of the handle drives the damping rotating seat 406 to gather toward the center, synchronously driving the front lower connecting member 9 to move inward, realizing the linked folding of the vehicle body frame and the handle assembly 4, reducing the number of operating steps; the front upper cross bar assembly 3 is provided on the opposite side between the front upper connecting members 14,The front upper crossbar assembly 3 includes a front middle connector 301, a front upper link 302 and a front lower link 303. The front middle connector 301 is arranged between the front upper connecting piece 14, and the left and right ends of the front middle connector 301 are respectively symmetrically provided with a front upper link 302 and a front lower link 303. One end of the front upper link 302 and the front lower link 303 are respectively rotatably connected to the front upper connecting piece 14 through a pin shaft, and the long groove provided at the other end of the front upper link 302 is respectively slidably connected to the pin shaft provided at the top inner side of the front middle connector 301, and the other end of the front lower link 303 is respectively rotatably connected to the pin shaft provided at the bottom inner side of the front middle connector 301. During the folding process, when the front middle connector 301 is moved downward by an external force, the front upper link 3 02 The long slot at one end slides along the connector pin, and the front lower connecting rod 303 rotates around the bottom pin, and the two together pull the front upper connecting piece 14 to gather towards the center to achieve the folding and contraction of the front cross bar; when unfolding, the reverse operation can be performed; the rear upper cross bar assembly 6 is provided on the opposite side between the rear upper connecting pieces 15, and the rear upper cross bar assembly 6 includes a cross rod 601, a cross piece upper connecting head 602, a cross piece lower connecting head 603, a sliding rod 604, a plug-in button 605, and a T-shaped plug-in block 606. The cross rod 601 is formed by the middle of two rods being connected by a pin to form a cross structure, and the tops of the left and right ends of the cross rod 601 are respectively installed with cross piece upper connecting heads 602 by rotating pins, and the cross piece upper connecting heads 602 are relative to the front upper cross bar. The T-shaped slots provided in the middle of one side of the component 3 are movably plugged into the T-shaped plug block 606 provided in the middle of the rear upper connecting piece 15, and the upper connector 602 of the cross piece is movably plugged into the upper rear connecting piece 15 through the plug button 605. The bottom of the upper connector 602 of the cross piece is fixedly installed with a slide rod 604. The lower connector 603 of the cross piece slidably installed on the outside of the slide rod 604 is rotatably connected to the bottom of the left and right ends of the cross rod 601 through a pin shaft. The bottom of the slide rod 604 is rotatably connected to the rear lower connecting piece 8 through a pin shaft. The plug button 605 includes a push button 6051, a plug button slot 6052, a plug lock tongue 6053, a limit slot 6054 and a limit rod 6055. The plug button slot 6052 is respectively The top of the connector 602 on the cross piece is provided, and a plug-in lock tongue 6053 is slidably installed on the inner side of the plug-in button slot 6052. The plug-in lock tongue 6053 is movably plugged into the slot opened on one side of the rear upper connector 15. The top of the plug-in lock tongue 6053 is fixedly connected to the push block button 6051 provided above the connector 602 on the cross piece. The limiting rod 6055 is slidably installed in the limiting groove 6054 provided in the middle of the plug-in lock tongue 6053, and the limiting rod 6055 is fixedly installed on the inner side of the plug-in button slot 6052. When the user toggles the push block button 6051, one end of the plug-in lock tongue 6053 is disengaged from the slot on one side of the rear upper connector 15 and slides toward the inside of the plug-in button slot 6052.At this time, the limit rod 6055 slides in the limit groove 6054 to limit the movement trajectory of the plug-in lock tongue 6053; after unlocking, the cross piece upper connector 602 and the T-shaped plug block 606 of the rear upper connector 15 are disengaged, and the user can push the cross cross rod 601 to make the bottom of the slide rod 604 rotate along the rear lower connector 8 through the pin shaft, thereby realizing the expansion of the "area" of the bottom of the camping vehicle by the rear upper cross bar assembly 6; and a push handle assembly 5 is provided on the top of the rear upper connector 15, and the push handle assembly 5 includes a push handle unlocking button 501, a right push handle piece 502, a left push handle piece 503, a push handle joint 504, a push rod 505, a push rod joint 506, a vertical rod upper joint 507 and a push rod adjustment button 508, and there are two vertical rod upper joints 507, and the vertical rod upper joint 5 07 are integrally connected and arranged at the top of the rear upper connecting member 15, and the vertical rod upper joint 507 is rotatably connected to the push rod joint 506 through the push rod adjustment button 508, and the other end of the push rod joint 506 is fixedly installed with a push rod 505, and the push handle joint 504 fixedly installed at the other end of the push rod 505 is rotatably installed with the right push handle member 502 and the left push handle member 503 through a pin shaft, and the right push handle member 502 and the left push handle member 503 are rotatably connected through the push handle unlocking button 501; the push handle unlocking button 501 includes a rotating box 1 5011, a rotating box 2 5012, an inner partition 5013, a button member 5014, a locking gear 5015, a guide rod 5016, a first inner tooth 5017, a second inner tooth 5018 and a second return spring 5019, which rotate The first rotating box 5011 and the second rotating box 5012 are integrally connected and arranged at opposite ends between the right push handle 502 and the left push handle 503, and the first rotating box 5011 and the second rotating box 5012 are rotatably connected. A locking gear 5015 is provided inside the first rotating box 5011. The locking gear 5015 is provided with a guide sleeve relative to the center of the inner side of the first rotating box 5011. The guide sleeve is slidably connected to a guide rod 5016 provided at the inner center of the first rotating box 5011. A second return spring 5019 is sleeved on the outer side of the guide rod 5016. The other end of the second return spring 5019 is sleeved on the outer side of the guide sleeve. The teeth provided on the locking gear 5015 are respectively aligned with the first inner teeth 5016 arranged in an equidistant circular array around the inner side of the first rotating box 5011. 17 is meshed with the second inner teeth 5018 arranged in an equidistant circular array around the inner side of the second rotating box 5012. An inner partition 5013 is provided on the top of the second inner teeth 5018, and the inner partition 5013 is fixedly installed at the inner middle part of the second rotating box 5012. The guide grooves arranged in an equidistant circular array around the inner partition 5013 are slidably connected to the push plates around the bottom of the button member 5014 slidably installed on the top of the second rotating box 5012. The push plate at the bottom of the button member 5014 is in active contact with the surface of the locking gear 5015; the push rod adjustment button 508 has the same structure as the push handle unlocking button 501. One end of the push rod adjustment button 508 is fixedly connected to the upper joint 507 of the vertical rod, and the other end of the push rod adjustment button 508 is fixedly connected to the push rod joint 506.When the button 5014 of the push handle unlocking button 501 is pressed, the push plate pushes the locking gear 5015 to slide along the guide rod 5016 and disengage the second inner tooth 5018 of the rotating box 2 5012. Then, the right push handle 502 and the left push handle 503 can be rotated and folded around the connection between the rotating box 1 5011 and the rotating box 2 5012. At the same time, the push rod joint 506 is unlocked by the push rod adjusting button 508, driving the push rod 505 to retract to the vertical rod upper joint 507; when the folding is completed, or when the right push handle 502 and the left push handle 503 are in the unfolded state, the locking gear 5015 moves toward the inner partition 5013 under the action of the second return spring 5019. The locking gear 5015 is positioned between the second rotating box 5012 and the first rotating box 5011, and the locking gear 5015 engages with the first inner tooth 5017 and the second inner tooth 5018 to achieve locking. The structure also includes two shed rods 16, each of which is in an inverted "U" shape and is symmetrically installed in the shed rod holes provided on the top of the front upper connecting member 14 and the rear upper connecting member 15. The camping vehicle can be completely folded by pulling the inverted U-shaped shed rods 16 out of the shed rod holes of the front upper connecting member 14 and the rear upper connecting member 15. The provision of the shed rods 16 facilitates the installation of a shed cloth, providing a sunshade function on the top of the camping vehicle.

[0047] The working principle of the present invention is as follows: first, when folding the camping car, the user can pull up the lifting rod 1073 through the external pull rope connected to the pull rope connecting hole 1074, and the lifting rod 1073 slides upward along the pull rod groove 1072 on the fixed guide rod 1071, so that the inclined surface of the middle part of the trapezoidal locking tongue 1076 is squeezed by the trapezoidal guide groove 1075 in the middle of the lifting rod 1073, so that the trapezoidal locking tongue 1076 slides along the inner side of the locking tongue guide groove 1078 and squeezes the fourth return spring 1077, causing the trapezoidal locking tongue 1076 to disengage from the slot hole in the middle of the intermediate sliding member 103, thereby releasing the lock of the intermediate sliding member 103; after the intermediate sliding member 103 is unlocked, the user continues to pull up the lifting rod 1073. During the process of moving the upper connecting rod 105 upwards driven by the middle seat 101, the upper connecting rod 105 connected to the four ends of the middle seat 101 rotates around the pin shaft. Since the four ends of the middle sliding member 103 are respectively connected to the upper connecting rod 105 through the connecting iron sheet 102, the middle sliding member 103 slides downwards along the middle sliding fixed rod 104 under the action of the connecting iron sheet 102. At the same time, the other end of the upper connecting rod 105 drives the four right front vertical rods 10, left front vertical rods 11, left rear vertical rods 12, and right rear vertical rods 13 connected to the rear lower connecting member 8 and the front lower connecting member 9 to gather toward the center of the middle seat 101 through the pin shaft, and the lower connecting rod 106 rotates with the connecting iron sheet 102. 404 and the upper connecting rod 401 move inwards, so that the upper connecting rod 201 is in the process of folding. One end of the front link 201 "slips" from the top of the trapezoidal block inside the middle link 204, and the pin at the bottom of the middle link 204 drives one end of the lower link 202 to move downward, and the other ends of the upper link 201 and the lower link 202 rotate with the vertical link 203 through the pin, and pull the front upper link 14 and the rear upper link 15 inward through the vertical link 203 to achieve the initial folding of the crossbar part; during the downward movement of the front middle connector 301, the action principle of the front upper link 302 and the front lower link 303 is the same as the action principle between the upper link 201, the lower link 202 and the middle link 204, and the other ends of the front upper link 302 and the front lower link 303 respectively pull the front upper link 14 inward;During the folding process, since the cross rod 601 is formed by the middle part of the two rods being connected by a pin to form a cross structure, the upper connector 602 of the cross member is movably connected with the rear upper connector 15 through the plug button 605. Therefore, during the folding process, the two lower connectors 603 of the cross member at the bottom of the cross rod 601 slide downward along the slide rod 604 respectively, cooperating with the inward movement of the front upper connector 14 and the rear upper connector 15 to achieve the synchronous folding of the rear upper horizontal bar; then, for the push handle assembly 5 The user presses the button member 5014 of the push handle unlocking button 501, and the push plate at the bottom of the button member 5014 pushes the latch gear 5015 to slide along the guide rod 5016 and squeezes the second return spring 5019, so that the latch gear 5015 disengages from the second inner tooth 5018 of the rotating box 2 5012 and slides the latch gear 5015 into the rotating box 1 5011. At this time, the right push handle member 502 and the left push handle member 503 can pass through the rotating box 1 5011 and the rotating box 2 5012. The other ends of the right push handle 502 and the left push handle 503 rotate along the pin on the push handle joint 504; at the same time, the push rod adjustment button 508 has the same structure as the push handle unlocking button 501, and by unlocking it in the same way, the push rod joint 506 drives the push rod 505 to rotate toward the vertical rod upper joint 507, so that the push handle assembly 5 is folded toward the inside of the frame as a whole; in addition, during the folding process, the bottom wheel assembly 7 also performs corresponding coordinated actions, and the rear wheel assembly 701 is a directional wheel , installed at the bottom of the left rear vertical rod 12 and the right rear vertical rod 13, and the front wheel assembly 702 is a universal wheel, installed at the bottom of the front lower connecting member 9. As the vehicle body folds, the rear wheel assembly 701 and the front wheel assembly 702 provide stable support for the vehicle body, ensuring a smooth folding process; at the same time, before the vehicle body begins to fold, the user needs to pull out the inverted U-shaped shed pole 16 from the shed pole holes of the front upper connecting member 14 and the rear upper connecting member 15 to complete the complete folding of the camping car. The structure of the camping car after it is fully folded is as follows; Figure 23 shown.

[0048] Components not described in detail herein are prior art.

[0049] Although the specific embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by ordinary technicians in this field, various changes can be made without departing from the purpose of the present invention. Modifications or deformations that do not involve creative work are still within the scope of protection of the present invention.

Claims

1. A camping car folding structure, characterized in that: The invention comprises a frame unit, a handle assembly (4), a push handle assembly (5) and a bottom wheel assembly (7); the frame unit comprises a folding base mechanism (1), a lifting crossbar mechanism (2), a front upper crossbar assembly (3), a rear upper crossbar assembly (6), a right front vertical rod (10), a left front vertical rod (11), a left rear vertical rod (12) and a right rear vertical rod (13); the folding base mechanism (1) comprises a connecting middle seat (101), a connecting iron sheet (102), an intermediate sliding member (103), an intermediate sliding fixing rod (104), an upper connecting rod (105), a lower connecting rod (106) and a lifting lock member (107); the intermediate sliding fixing rod (104) is fixedly installed in a through hole provided at the center of the connecting middle seat (101); ), and an intermediate sliding member (103) is slidably installed on the outer side of the intermediate sliding fixing rod (104), and the lifting lock (107) provided inside the intermediate sliding fixing rod (104) is movably plugged into the slot provided on the intermediate sliding member (103), and the intermediate sliding member (103) and the connecting intermediate seat (101) are in an "X"-shaped structure, and the four ends of the intermediate sliding member (103) are respectively rotatably installed with a connecting iron sheet (102) through a pin shaft, and the top of the connecting iron sheet (102) is rotatably connected to the upper connecting rod (105) rotatably installed with the four ends of the connecting intermediate seat (101) through a pin shaft, and the other end of the upper connecting rod (105) is respectively provided with a right front vertical rod (10), a left front vertical rod (10), and a 1), the left rear vertical rod (12) and the right rear vertical rod (13), the upper and lower ends of the right front vertical rod (10) and the left front vertical rod (11) are respectively fixedly installed with a front upper connecting piece (14) and a front lower connecting piece (9), the upper and lower ends of the left rear vertical rod (12) and the right rear vertical rod (13) are respectively fixedly installed with a rear lower connecting piece (8) and a rear upper connecting piece (15), the rear lower connecting piece (8) and the front lower connecting piece (9) are respectively rotatably connected to the other end of the upper connecting rod (105) through a pin shaft at the top of one end connected to the middle seat (101), the rear lower connecting piece (8) and the front lower connecting piece (9) are respectively rotatably installed with a lower connecting rod (106) through a pin shaft at the bottom of one end connected to the middle seat (101), and the lower The other end of the connecting rod (106) is rotatably connected to the middle part of the connecting iron sheet (102) through a pin shaft; a lifting crossbar mechanism (2) is respectively provided between the left front vertical rod (11) and the left rear vertical rod (12) and between the right front vertical rod (10) and the right rear vertical rod (13); a bottom wheel assembly (7) is respectively provided at the bottom of the rear lower connecting member (8) and the front lower connecting member (9), and a pull handle assembly (4) is provided on the opposite side between the front lower connecting members (9); a front upper crossbar assembly (3) is provided on the opposite side between the front upper connecting members (14), a rear upper crossbar assembly (6) is provided on the opposite side between the rear upper connecting members (15), and a push handle assembly (5) is provided on the top of the rear upper connecting member (15).

2. The folding structure of a camping vehicle according to claim 1, characterized in that: The lifting crossbar mechanism (2) comprises an upper connecting rod (201), a lower connecting rod (202), a vertical rod connecting piece (203), an intermediate connecting piece (204) and a sliding button (205). Two intermediate connecting pieces (204) are provided, and the intermediate connecting pieces (204) are respectively provided between the left front vertical rod (11) and the left rear vertical rod (12) and between the right front vertical rod (10) and the right rear vertical rod (13). The left and right ends of the intermediate connecting piece (204) are respectively provided with vertical rod connecting pieces (203), and the vertical rod connecting pieces (203) are respectively slidably installed in the sliding grooves provided on the opposite side of the left front vertical rod (11) and the left rear vertical rod (12) and the opposite side of the right front vertical rod (10) and the right rear vertical rod (13). The middle part of the vertical rod connecting member (203) is respectively provided with a sliding button (205) which can be movably plugged into the front upper connecting member (14) and the rear upper connecting member (15); the top and bottom of one end of the vertical rod connecting member (203) relative to the middle connecting member (204) are respectively rotatably mounted with an upper connecting rod (201) and a lower connecting rod (202) through a pin shaft; the other end of the lower connecting rod (202) is respectively rotatably connected to the pin shaft provided at the bottom inside the middle connecting member (204); the long groove provided at the other end of the upper connecting rod (201) is respectively slidably connected to the pin shaft provided at the top inside the middle connecting member (204); the sliding button (205) is composed of a button compartment (2051), a button block (2052), a trapezoidal guide block (2053), a locking block (2054) and a plurality of other components. , a second trapezoidal guide block (2055) and a first return spring (2056), the button compartment (2051) is respectively arranged inside the vertical rod connecting member (203), and a locking block (2054) is slidably installed inside the button compartment (2051), one end of the locking block (2054) passes through the through slot opened on one side of the vertical rod connecting member (203) and is movably plugged into the slots set on the inner sides of the front upper connecting member (14) and the rear upper connecting member (15), and the locking block (2054) and the slots set in the middle and bottom of the slide grooves on the side opposite to the left front vertical rod (11) and the left rear vertical rod (12) and the side opposite to the right front vertical rod (10) and the right rear vertical rod (13) are located on the same central axis, and the other end of the locking block (2054) is opened. A first return spring (2056) is respectively provided in the blind hole, and the other end of the first return spring (2056) is respectively fixedly connected to the inner wall of the button compartment (2051), and a trapezoidal guide block 1 (2053) and a trapezoidal guide block 2 (2055) are respectively provided on the upper and lower sides of the locking block (2054), and the inclined plane between the trapezoidal guide block 1 (2053) and the trapezoidal guide block 2 (2055) is slidably connected, and the trapezoidal guide block 2 (2055) is respectively fixedly connected to the locking block (2054), and the other end of the trapezoidal guide block 1 (2053) is respectively fixedly connected to the button block (2052), and the button block (2052) is respectively slidably installed in the button groove provided on the vertical rod connecting member (203) and the button compartment (2051).

3. The folding structure of a camping vehicle according to claim 1, characterized in that: The front upper crossbar assembly (3) comprises a front intermediate connector (301), a front upper connecting rod (302) and a front lower connecting rod (303). The front intermediate connector (301) is arranged between the front upper connecting member (14), and the left and right ends of the front intermediate connector (301) are respectively symmetrically provided with the front upper connecting rod (302) and the front lower connecting rod (303). One end of the front upper connecting rod (302) and the front lower connecting rod (303) are respectively rotatably connected to the front upper connecting member (14) through a pin shaft. The long groove provided at the other end of the front upper connecting rod (302) is respectively slidably connected to the pin shaft provided at the top inner side of the front intermediate connector (301). The other end of the front lower connecting rod (303) is respectively rotatably connected to the pin shaft provided at the bottom inner side of the front intermediate connector (301).

4. The folding structure of a camping vehicle according to claim 1, characterized in that: The pull handle assembly (4) comprises a pull handle (401), a pull handle telescopic button (402), a pull rod (403), a pull rod intermediate connector (404), a pull handle lower connector (405), a damping rotary seat (406) and a latch assembly (407), wherein the pull rod intermediate connector (404) is arranged in the middle between the right front vertical rod (10) and the left front vertical rod (11), and the pull rod intermediate connector (404) is in a "triangle" structure, and the pull rod (403) is slidably installed in the inverted "T"-shaped through hole arranged in the middle of the pull rod intermediate connector (404), and the pull handle (403) is fixedly installed on the top of the pull rod (403). 401), and the handle telescopic button (402) slidably installed in the sliding hole at the bottom inside the handle (401) is connected to the latch assembly (407) set in the middle of the inner side of the pull rod intermediate connecting piece (404), and the bottoms of the left and right ends of the pull rod intermediate connecting piece (404) are respectively rotatably installed with the handle lower connecting rod (405) through the pin shaft, and the other end of the handle lower connecting rod (405) is respectively rotatably connected to the damping rotating seat (406) set on the opposite side of the front lower connecting piece (9) through the pin shaft, and the damping rotating seat (406) is respectively rotatably connected to the damping fixed seat fixedly installed on the opposite side of the front lower connecting piece (9);The latch assembly (407) comprises a telescopic button connecting rod (4071), a lock tongue pushing block (4072), a lock tongue bottom block (4073), a position limiting blocking ring (4074), a trapezoidal lock tongue (4075), a third return spring (4076), a ring groove (4077), a trapezoidal pushing groove (4078) and a lock tongue sliding groove (4079), wherein the lock tongue bottom block (4073) is arranged at the inner bottom of the pull rod (403), and the lock tongue bottom block (4073) is arranged at the inner bottom of the pull rod (403). The bottom of the lock tongue block (4073) is fixedly connected to the bottom of the pull rod (403) through a limit blocking ring (4074), and the limit blocking ring (4074) is movably mounted on the bottom of the inverted "T"-shaped through hole in the middle of the pull rod intermediate connector (404), and the limit blocking ring (4074) limits and blocks the pull rod (403). A lock tongue push block (4072) is slidably installed in a guide groove provided on one side of the lock tongue bottom block (4073). The lock tongue push block (4072) The top inclined surface of the inner side of the trapezoidal push groove (4078) provided at the bottom is slidably connected to the middle inclined surface of the trapezoidal lock tongue (4075) provided in the middle of the lock tongue bottom block (4073). The trapezoidal lock tongue (4075) is slidably installed in the lock tongue sliding groove (4079) provided in the middle of the lock tongue bottom block (4073). One end of the trapezoidal lock tongue (4075) passes through the through hole provided on the pull rod (403) and the annular groove provided in the middle of the inner side of the pull rod intermediate connecting piece (404). (4077) is movably connected, the other end of the trapezoidal lock tongue (4075) is fixedly mounted with a third return spring (4076), and the other end of the third return spring (4076) is fixedly connected to the inner wall of the pull rod (403), the top of the lock tongue push block (4072) is fixedly mounted with a telescopic button connecting rod (4071), and the top of the other end of the telescopic button connecting rod (4071) is fixedly connected to the bottom of the handle telescopic button (402).

5. The folding structure of a camping vehicle according to claim 1, characterized in that: The push handle assembly (5) comprises a push handle unlocking button (501), a right push handle member (502), a left push handle member (503), a push handle joint (504), a push rod (505), a push rod joint (506), a vertical rod upper joint (507) and a push rod adjustment button (508). Two vertical rod upper joints (507) are provided, and the vertical rod upper joints (507) are integrally connected to the top of the rear upper connecting member (15). The vertical rod upper joints (507) are rotatably connected to the push rod joint (506) through the push rod adjustment button (508). The other end of the push rod joint (506) is fixedly installed with a push rod (505), and the other end of the push rod (505) is fixed. The installed push handle joint (504) is respectively installed with a right push handle (502) and a left push handle (503) through a pin shaft, and the right push handle (502) and the left push handle (503) are rotatably connected through a push handle unlocking button (501); the push handle unlocking button (501) comprises a rotating box (5011), a rotating box (5012), an inner partition (5013), a button (5014), a locking gear (5015), a guide rod (5016), a first inner tooth (5017), a second inner tooth (5018) and a second return spring (5019), and the rotating box (5011) and the rotating box (5012) are respectively integrally connected and arranged on the right push handle. (502) and the opposite end between the left push handle (503), and the rotating box one (5011) and the rotating box two (5012) are rotatably connected, the interior of the rotating box one (5011) is provided with a latch gear (5015), the latch gear (5015) is provided with a guide sleeve relative to the center of the inner side of the rotating box one (5011), and the guide sleeve is slidably connected to the guide rod (5016) provided at the center of the inner side of the rotating box one (5011), the outer side of the guide rod (5016) is provided with a second return spring (5019), the other end of the second return spring (5019) is provided on the outer side of the guide sleeve, and the teeth provided on the latch gear (5015) are provided. The first inner teeth (5017) are respectively meshed with the first inner teeth (5017) arranged in an equidistant circular array around the inner side of the first rotating box (5011) and the second inner teeth (5018) arranged in an equidistant circular array around the inner side of the second rotating box (5012). An inner partition (5013) is provided on the top of the second inner teeth (5018), and the inner partition (5013) is fixedly installed on the inner middle part of the second rotating box (5012). The guide grooves arranged in an equidistant circular array around the inner partition (5013) are slidably connected to the push plates around the bottom of the button member (5014) slidably installed on the top of the second rotating box (5012). The push plate at the bottom of the button member (5014) is in active contact with the surface of the latch gear (5015).The push rod adjustment button (508) has the same structure as the push handle unlocking button (501), one end of the push rod adjustment button (508) is fixedly connected to the vertical rod upper joint (507), and the other end of the push rod adjustment button (508) is fixedly connected to the push rod joint (506).

6. The folding structure of a camping vehicle according to claim 1, characterized in that: The rear upper crossbar assembly (6) comprises a cross rod (601), a cross member upper connector (602), a cross member lower connector (603), a slide bar (604), a plug button (605), and a T-shaped plug block (606). The cross rod (601) is formed by rotating the middle parts of two rods through a pin to form a cross structure. The tops of the left and right ends of the cross rod (601) are respectively installed with cross member upper connectors (602) through pins. The cross member upper connector (602) The T-shaped slot provided in the middle of one side of the front upper horizontal bar assembly (3) is respectively movably plugged into the T-shaped plug block (606) provided in the middle of the rear upper connecting piece (15), and the cross piece upper connecting head (602) is respectively movably plugged into the rear upper connecting piece (15) through the plug button (605), and the bottom of the cross piece upper connecting head (602) is respectively fixedly installed with a slide rod (604), and the cross piece lower connecting head (603) slidably installed on the outer side of the slide rod (604) is respectively connected to the cross cross rod (601) through a pin shaft. ) are rotatably connected at the bottom of the left and right ends, and the bottom of the slide bar (604) is rotatably connected to the rear lower connecting piece (8) through a pin shaft; the plug button (605) comprises a push button (6051), a plug button slot (6052), a plug lock tongue (6053), a limit slot (6054) and a limit rod (6055), and the plug button slot (6052) is respectively provided at the top of the connector (602) on the cross piece, and the inner side of the plug button slot (6052) is respectively slidably installed with a plug The locking tongue (6053) is movably connected to a slot provided on one side of the rear upper connecting member (15). The top of the locking tongue (6053) is fixedly connected to a push button (6051) provided above the upper connector (602) of the cross member. A limiting rod (6055) is slidably installed in a limiting groove (6054) provided in the middle of the locking tongue (6053), and the limiting rod (6055) is fixedly installed on the inner side of the plug button groove (6052).

7. The folding structure of a camping vehicle according to claim 1, characterized in that: The bottom wheel assembly (7) comprises a rear wheel assembly (701) and a front wheel assembly (702), wherein the rear wheel assembly (701) is a directional wheel and is respectively arranged at the bottom of the left rear vertical rod (12) and the right rear vertical rod (13), and the rear wheel assembly (701) comprises a rear wheel base (7011), a brake pedal fixing member (7012), a brake pedal (7013), a brake line (7014), a rear wheel brake assembly (7015), a rear wheel axle assembly (7016), a rear wheel base side plate (7017), a rear wheel (7018), a brake disc frame (7019), a fixing member connecting rod (70110), an arc-shaped rotating groove (70111), an arc-shaped pushing groove (70112), a brake line clamp The rear wheel base (7011) is fixedly mounted on the bottom of the left rear vertical rod (12) and the right rear vertical rod (13), and a brake pedal fixing member (7012) is fixedly mounted on the opposite side of the rear wheel base (7011). The other side of the rear wheel base (7011) is fixedly mounted with a rear wheel base side plate (7017). A rear wheel axle assembly (7016) is provided in the middle between the rear wheel base side plate (7017) and the rear wheel base (7011). The rear wheel axle assembly (7016) includes a rear wheel axle rod (70161), an axle plate, and a rear wheel axle assembly (7016). (70162), a third compression spring (70163) and an axle plate slot (70164), the axle plate (70162) is arranged between the side plate (7017) of the rear wheel base and the rear wheel base (7011), and the bottom of the axle plate (70162) is movably mounted in the axle plate slot (70164) arranged on the outer side of the bottom of the rear wheel base (7011), the width of the middle part of the axle plate (70162) is greater than the groove width of the axle plate slot (70164), the outer side of the protrusion arranged on the top of the axle plate (70162) is respectively set with a third compression spring (70163), and the top of the third compression spring (70163) is movably mounted on the inner top of the rear wheel base (7011) The elliptical groove provided in the middle of the axle plate (70162) is movably engaged with the annular groove provided in the middle of the rear wheel shaft rod (70161) which is rotatably mounted on the rear wheel base (7011) and the rear wheel shaft hole (70116) provided in the center of the rear wheel base (7011), and the rear wheel (7018) and the brake disc frame (7019) are provided at one end of the rear wheel shaft rod (70161) away from the rear wheel base (7011), and the center of one side of the rear wheel (7018) relative to the rear wheel base (7011) is integrally connected with the brake disc frame (7019), and the middle of the brake disc frame (7019) and the rear wheel (7018) are fixedly connected to the end of the rear wheel shaft rod (70161);The outer side of the brake pedal fixing member (7012) is rotatably mounted with a brake pedal (7013), and the arc-shaped rotation grooves (70111) provided at the upper and lower ends of the middle part of the brake pedal (7013) are respectively slidably connected with the fixing member connecting rods (70110) provided at the upper and lower ends of the side of the brake pedal fixing member (7012), and a brake wire (7014) is provided above the brake pedal (7013). The left and right ends of the brake wire (7014) are respectively inserted into the brake wire fixing tube (70114) connected to the rear wheel base (7011), and the left and right ends of the wire core (70141) provided inside the brake wire (7014) are respectively fixedly mounted with a brake wire clamping block (70142), and the brake wire (70142) is respectively fixedly mounted on the left and right ends. The wire clamp blocks (70142) are respectively mounted in the brake wire clamping grooves (70113) provided at one end of the brake pedal (7013), and the other end of the brake pedal (7013) is respectively provided with arc-shaped push-up grooves (70112), and the inner bottom surfaces of the arc-shaped push-up grooves (70112) are inclined. The front ends of the arc-shaped push-up grooves (70112) relative to the rear wheel base (7011) are respectively provided with rear wheel brake assemblies (7015). The rear wheel brake assemblies (7015) are respectively slidably mounted in the rear wheel brake assembly push-up holes (70115) provided at one end of the rear wheel base (7011). The rear wheel brake assemblies (7015) include a push-up rod sleeve (70151), an anti-slip groove (7015), and a push-up rod sleeve (70151). 2), brake plug rod (70153), anti-drop pin (70154), first compression spring (70155) and second compression spring (70156), the push rod sleeve (70151) is respectively slidably mounted inside the push hole (70115) of the rear wheel brake assembly, one end of the push rod sleeve (70151) is provided with an arc end portion and is respectively in active contact with the inner bottom surface of the arc push groove (70112), the other end of the push rod sleeve (70151) is respectively provided with a brake plug rod (70153), and the anti-drop pin (70154) provided on the outer side of the brake plug rod (70153) is slidably connected with the anti-drop groove (70152) provided in the middle of the push rod sleeve (70151), the brake plug rod (70153) is respectively provided with a brake plug rod (70153), and the anti-drop pin (70154) provided on the outer side of the brake plug rod (70153) is slidably connected with the anti-drop groove (70152) provided in the middle of the push rod sleeve (70151), and the brake plug rod (70153) is respectively provided with a brake plug rod (70153). ) and the interior of the push rod sleeve (70151). A first compression spring (70155) is provided between the front wheel assembly (702) and the push rod sleeve (70151). The other end of the brake plug rod (70153) passes through the through hole provided at one end of the rear wheel base side plate (7017) and is movably connected to the brake plug holes provided in an array of equidistant circles around one side of the brake disc frame (7019). A second compression spring (70156) is provided on the outer side of the brake plug rod (70153). The left and right ends of the second compression spring (70156) are respectively in movably contact with the outer side of the anti-drop pin (70154) and the inner side of the rear wheel base side plate (7017). The front wheel assembly (702) is a universal wheel, and the front wheel assembly (702) is respectively installed at the bottom of the front lower connecting member (9).

8. The folding structure of a camping vehicle according to claim 7, characterized in that: The front wheel assembly (702) comprises a front wheel seat (7021), a wheel fork (7022), a wheel lock assembly (7023), a brake pedal (7024), a brake plug (7025), a wheel side brake gear ring (7026), a front wheel (7027), a brake slot (7028) and a brake release slot (7029). The front wheel seat (7021) is respectively arranged at the bottom of the front lower connecting member (9), and the top of the front wheel seat (7021) is rotatably connected to the front lower connecting member (9) through the wheel lock assembly (7023). The locking wheel assembly (7023) is composed of a guide bar cylinder (70231), a lock ring (70232), an inner trapezoidal push groove (70233), a push bar (70234), a guide bar (70235), a guide bar insertion hole (70236), an axle (70237) and a guide bar groove (70238). The guide bar cylinder (70231) is fixedly mounted on the inner bottom of the front lower connecting member (9). The axle (70237) arranged at the center of the guide bar cylinder (70231) is connected to the axle (70237) arranged at the center of the top of the front wheel seat (7021). The guide bar cylinder (70231) and the front wheel seat (7021) are respectively provided with a locking ring (70232), and the locking ring (70232) is respectively rotatably mounted on the outer bottom of the guide bar cylinder (70231), and the outer end of the locking ring (70232) is respectively provided with an inner trapezoidal push groove (70233), and the upper part of the inner trapezoidal push groove (70233) is respectively provided with a push bar (70234), and the bottom of the push bar (70234) is a trapezoidal structure, and the push bar (70234) is The bottom is slidably connected to the inclined surface of the inner trapezoidal push groove (70233); the push bar (70234) is integrally connected to one end of the guide bar cylinder (70231) and is provided with a guide bar (70235); and the guide bar (70235) is slidably installed in the guide bar groove (70238) provided at one end of the guide bar cylinder (70231); the bottom of the guide bar (70235) passes through the through hole provided at the bottom of the guide bar cylinder (70231) and is movably connected to the guide bar insertion hole (70236) provided at one end of the top of the front wheel seat (7021);The bottom of the front wheel seat (7021) is integrally connected with a wheel fork (7022), and the wheel fork (7022) is an inverted "U" shaped structure. The bottom of the wheel fork (7022) is rotatably mounted with a front wheel (7027), and the outer center of the front wheel (7027) is integrally connected with a wheel side brake gear ring (7026). The extension block provided in the middle of one side of the wheel fork (7022) is rotatably mounted with a brake pedal (7024) through a pin shaft. The brake pedal (7024) is an "U" shaped structure. "-shaped structure, the brake pedal (7024) is integrally connected to one end of the wheel-side brake gear ring (7026) with a brake plug (7025), and the brake plug (7025) is movably plugged with the teeth on the wheel-side brake gear ring (7026), and the hemispherical protrusions provided on the inner side of the brake pedal (7024) are movably engaged with the brake release slot (7029) provided in the middle part of the outer side of the wheel fork (7022), and the outer bottom of the wheel fork (7022) is provided with a brake slot (7028).

9. The folding structure of a camping vehicle according to claim 1, characterized in that: The lifting lock member (107) comprises a fixed guide rod member (1071), a pull rod groove (1072), a lifting rod (1073), a drawstring connection hole (1074), a trapezoidal guide groove (1075), a trapezoidal latch tongue (1076), a fourth reset spring (1077) and a latch tongue guide groove (1078), wherein the fixed guide rod member (1071) is fixedly mounted on the inner top of the middle sliding fixed rod (104), a lifting rod (1073) is slidably mounted in the pull rod groove (1072) provided on the left side of the fixed guide rod member (1071), a drawstring connection hole (1074) is provided on the top of the lifting rod (1073), and a middle portion of the lifting rod (1073) is provided with a pull rope connection hole (1074). A trapezoidal guide groove (1075) is provided, and the inclined surface at the bottom of the trapezoidal guide groove (1075) is slidably connected to the inclined surface at the middle of a trapezoidal latch tongue (1076) provided at the middle of a fixed guide rod (1071). The trapezoidal latch tongue (1076) is slidably installed in the latch tongue guide groove (1078) provided at the middle of the fixed guide rod (1071). One end of the trapezoidal latch tongue (1076) passes through a through groove provided on the middle sliding fixed rod (104) and is movably plugged into a slot hole in the middle of the middle sliding member (103). A fourth return spring (1077) provided at the other end of the trapezoidal latch tongue (1076) is fixedly connected to the inner wall of the middle sliding fixed rod (104).

10. The folding structure of a camping vehicle according to claim 1, characterized in that: It also includes a shelf pole (16), two of which are provided, and the shelf poles (16) are in an inverted "U"-shaped structure. The shelf poles (16) are symmetrically installed in the shelf pole holes provided on the top of the front upper connecting piece (14) and the rear upper connecting piece (15).

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