CN106394631A

CN106394631A - Four-wheeled foldable trailer with coupling mechanism

Info

Publication number: CN106394631A
Application number: CN201610116443.6A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-08-27
Filing date: 2013-08-27
Publication date: 2017-02-15
Also published as: CN103407472A; CN105905141A; CN105905142A; CN105905136A; CN106394630A; CN103407472B; CN105905144A; CN105905143A; CN105905145A

Abstract

The invention discloses a four-wheeled foldable trailer with a coupling mechanism. The four-wheeled foldable trailer comprises a front trailer frame assembly, a rear trailer frame assembly, and a coupling mechanism for coupling the front trailer frame assembly and the rear trailer frame assembly, wherein the front trailer frame assembly comprises a front loading frame, two front wheel assemblies, a front blocking plate arranged at the front end of the front loading frame, and a pull rod arranged on the front blocking plate. The four-wheeled foldable trailer is characterized in that a rotating connecting part with pin holes is arranged at one end, which is close to front connecting bosses, of the front blocking plate, and two protruding clamping plates are arranged at the other end, which is far away from the front connecting bosses, of the front blocking plate; the bottom of the pull rod is connected with the rotating connecting part of the front blocking plate in a rotating manner; and the middle of the pull rod can be clamped between the two clamping plates. The four-wheeled foldable trailer disclosed by the invention has the advantages of multiple purposes and multiple functions.

Description

A kind of Four-wheel foldable trailer with coupling mechanism

Technical field

The present invention relates to trailer technical field, more particularly, to a kind of Four-wheel foldable trailer with coupling mechanism.

Background technology

People are commonly used in shopping carrying article to save strength for user to four-wheel trailer, but current four-wheel Trailer volume is generally larger to draw in it is impossible to fold, inconvenient to carry, takes up room also very big when depositing.

Patent documentation CN202186404U discloses a kind of foldable luggage trolley, and this car includes telescopic vehicle frame, its underpart It is provided with the cylindrical push-pull bar being hinged with luggage truck weight tray, described cylinder push-pull bar top is provided with first annular groove, First annular groove lower surface is provided with the first spiral-guide face；Weight tray is fitted with vehicle frame after folding, and hangs down with vehicle frame after its expansion Straight setting, for carrying luggage；Weight tray be connected with vehicle frame side be provided with the wheel being fixedly connected with described weight tray erect Direct Travel control piece；Wheel stand has the second cannelure being adapted to socket with described cylinder push-pull bar, on the second cannelure End face is provided with the second spiral-guide face being adapted with described first spiral-guide face, a fixing rotation of taking a seat in the second cannelure Torque spring；Push-pull bar is vertically arranged in the second cannelure, and the axis hole of push-pull bar bottom is socketed in vertical road wheel Stroke Control In the axle of part；When weight tray launches, described vertical road wheel forms control piece and forms pushing tow to the second cannelure, described first Move on guiding vertical road wheel under the collective effect in spiral-guide face and the second spiral-guide face and launch to both sides outward turning, carry bottom When plate folds, wheel inward turning in the presence of described rotary torsion spring reclaims and vertically moves down simultaneously；Vehicle wheel edge after folding Protrude from the weight tray bottom edge after folding.

Detailed mechanism and the operation principle of collapsible wheel described in detail by this patent documentation, but this kind of foldable luggage trolley Due to being the push-and-pull car of only two-wheeled, carrying dynamics is less to be used it is impossible to be widely used in factory floor.

Content of the invention

It is an object of the invention to provide a kind of Four-wheel foldable trailer with coupling mechanism relatively reasonable in structure.

The technical scheme realizing the object of the invention is：A kind of Four-wheel foldable trailer with coupling mechanism, including front truck Frame assembly, Rear frame component and the coupling mechanism for coupling front frame assembly and Rear frame component；Before front frame assembly includes Luggage carrier, two front wheel assemblies, it is arranged on the front apron of front luggage carrier front end and is arranged on the pull bar on front apron；Front Plate is provided with the rotating junction with pin-and-hole close to front one end connecting boss, and front apron is provided with away from front one end connecting boss Two clamps protruding；The rotating junction of the bottom of pull bar and front apron rotates and is connected, the middle part of pull bar can clamping connection in two clamps Between；Rear frame component includes rear luggage carrier, two rear wheel assemblies, is arranged on the backboard of rear luggage carrier rear end and is used for Connect two connectors of backboard and rear luggage carrier；Afterwards the left and right sides end of luggage carrier rear end be respectively provided with one rearwardly projecting Traveller afterwards, each rear traveller is provided with limiting block platform after annular, and the rear end of each rear limiting block platform is provided with multiple rear spacing teeth groove；After each The rear end of traveller is provided with rear pin-and-hole；The front end of each connector be provided with the first pivoted hole, afterwards draw in bearing surface, afterwards launch bearing surface, And after connecting, draw the rear arc transition face of bearing surface and rear expansion bearing surface in；Each connector with corresponding one after traveller pass through Bearing pin through the first pivoted hole and rear pin-and-hole rotates connection, the central axis of the first pivoted hole and the rear distance launching bearing surface More than this central axis and the rear distance drawing bearing surface in；Launch bearing surface parallel to backboard place plane, each rear receipts after each Hold together bearing surface perpendicular to backboard place plane；The rear end of each connector is provided with for rotating, with backboard, the second pivot joint being connected Hole, gathering load-carrying surface and expansion load-carrying surface, draw load-carrying surface in and are located at the side away from the first pivoted hole for second pivoted hole, launch Load-carrying surface is located at the second pivoted hole close to the side of the first pivoted hole；Each rear wheel assemblies include having rear sleeve rear wheel frame, Torsion spring and the rear wheel being rotatably arranged on rear wheel frame afterwards；The front end of each rear sleeve is provided with after being matched with each rear spacing teeth groove Spacing double wedge；Rear sleeve be set in corresponding one after on traveller, rear torsion spring is set on traveller after accordingly, and is located at rear sleeve Within；Backboard is provided with two and connects boss afterwards, and each rear boss that connects is provided with rear axis hole and along outside rear luggage carrier horizontal direction Convex load flange；Connect boss and a corresponding connector after each to rotate by the bearing pin through rear axis hole and the second pivoted hole Connect；Load flange during rotating around the second pivoted hole with rear connection boss, hold by the gathering that can be connected to connector On power face and expansion load-carrying surface, and then follower link is carried to rotate；The left and right sides end of front luggage carrier front end is respectively provided with one forward Prominent front sliding column, each front sliding column is provided with annular front limit gear platform, and the front end that each front limit keeps off platform is provided with multiple front limit teeth Groove；The front end of each front sliding column is provided with front pin-and-hole；Front wheel carrier, front torsion spring and rotation that each front wheel assemblies include having anterior cannula set Put the front vehicle wheel on front wheel carrier；The rear end of each anterior cannula is provided with the front limit double wedge matching with each front limit teeth groove；Protheca Pipe box is located on a corresponding front sliding column, and front torsion spring is set on corresponding front sliding column, and is located within anterior cannula.

The present invention, when using, both can be used cooperatively with Rear frame component, and combination forms Four-wheel foldable trailer, also may be used To be used alone, as the collapsible luggage trolley of two-wheeled, there is multi-purpose.

Brief description

Fig. 1 is a kind of perspective view of the present invention；

Fig. 2 is a kind of perspective view when front frame assembly shown in Fig. 1 is observed from another angle；

Fig. 3 is a kind of side view of front frame assembly shown in Fig. 1；

Fig. 4 is a kind of side view of front apron in front frame assembly shown in Fig. 1；

Fig. 5 is a kind of explosive view of front frame assembly shown in Fig. 1；

Fig. 6 is a kind of explosive view of front frame assembly shown in Fig. 2；

Fig. 7 is a kind of three-dimensional knot being in using the Four-wheel foldable trailer that front frame assembly shown in Fig. 1 is made during deployed condition Structure schematic diagram；

Fig. 8 is a kind of perspective view of Rear frame component in trailer shown in Fig. 7；

Fig. 9 is a kind of perspective view when another angle is observed for the Rear frame component shown in Fig. 8；

Figure 10 is a kind of side view of Rear frame component shown in Fig. 8；

Figure 11 is a kind of explosive view of Rear frame component shown in Fig. 8；

Figure 12 is a kind of explosive view of Rear frame component shown in Fig. 9；

Figure 13 is that trailer shown in Fig. 7 is in a kind of perspective view during flat；

Figure 14 is a kind of perspective view of backboard in trailer shown in Figure 13；

Figure 15 is that trailer shown in Fig. 7 is in a kind of perspective view during preliminary folded state；

Figure 16 is a kind of explosive view of backboard and connector in Figure 15；

Figure 17 is a kind of side view of trailer shown in Figure 15；

Figure 18 is a kind of structural representation of coupling mechanism in trailer shown in Fig. 7；

Figure 19 is that trailer shown in Fig. 7 is in a kind of perspective view during completely folded state；

Figure 20 is a kind of side view of trailer shown in Figure 19.

It is labeled as shown in accompanying drawing：Front frame assembly 1, front luggage carrier 11, front sliding column 111, front limit keeps off platform 112, front limit Teeth groove 113, front pin-and-hole 114, front wheel assemblies 12, anterior cannula 121, front wheel carrier 122, front torsion spring 123, front vehicle wheel 124, front limit Double wedge 125, front apron 13, front connection boss 131, front-axle hole 132, front gathering bearing surface 133, front expansion bearing surface 134, frontal arc Shape transition face 135, rotating junction 136, clamp 137, pull bar 14, Rear frame component 2, rear luggage carrier 21, rear traveller 211, after Limiting block platform 212, spacing teeth groove 213 afterwards, rear pin-and-hole 214, rear wheel assemblies 22, rear sleeve 221, rear wheel frame 222, rear torsion spring 223, rear wheel 224, spacing double wedge 225 afterwards, backboard 23, connect boss 231, rear axis hole 232, load flange 233 afterwards, connect Part 24, the first pivoted hole 241, draws bearing surface 242 afterwards in, launches bearing surface 243, rear arc transition face 244, the second pivoted hole afterwards 245, gathering load-carrying surface 246, expansion load-carrying surface 247, coupling mechanism 3, front coupling bar 31, locating wheel 32, locating notch 321, after Coupling bar 33, couples flange 34, axostylus axostyle 35, annular gear platform 36, screw thread spring 37, attachment bolt assembly 38, bearing pin 100.

Specific embodiment

（Embodiment 1）

Fig. 1 to Fig. 6 shows a kind of specific embodiment of the present invention, and wherein, Fig. 1 is that a kind of stereochemical structure of the present invention is illustrated Figure；Fig. 2 is a kind of perspective view when front frame assembly shown in Fig. 1 is observed from another angle；Fig. 3 is front truck shown in Fig. 1 A kind of side view of frame assembly；Fig. 4 is a kind of side view of front apron in front frame assembly shown in 1；Fig. 5 is front truck shown in Fig. 1 A kind of explosive view of frame assembly；Fig. 6 is a kind of explosive view of front frame assembly shown in Fig. 2.

The present embodiment is a kind of front frame assembly for Four-wheel foldable trailer, as shown in Fig. 1 to Fig. 6, front frame group Part 1 includes front 11, two front wheel assemblies 12 of luggage carrier, is arranged on the front apron 13 of front luggage carrier front end and is arranged on front Pull bar 14 on plate；Front apron close to front connect boss one end be provided with the rotating junction 136 with pin-and-hole, front apron away from Front one end connecting boss is provided with two clamps 137 of protrusion；The bottom of pull bar is rotated with the rotating junction of front apron and is connected, and draws The middle part of bar can clamping connection between two clamps.

The rear end of front frame assembly is provided with coupling mechanism 3；This coupling mechanism includes being arranged on the left and right of front luggage carrier rear end Two front coupling bars 31 of two side ends, the locating wheel 32 being fixedly installed on each front coupling bar and the connection passing through locating wheel centre bore Connecting bolt assembly 38；The edge of each locating wheel is provided with two arc shaped locating notches 321 being centrosymmetric.

The left and right sides end of front luggage carrier front end is respectively provided with a front sliding column 111 projecting forward, and each front sliding column is provided with Annular front limit keeps off platform 112, and the front end that each front limit keeps off platform is provided with multiple front limit teeth groove 113；The front end of each front sliding column is provided with Front pin-and-hole 114；Each front wheel assemblies include having the front wheel carrier 122 of anterior cannula 121, front torsion spring 123 and are rotatably arranged on front-wheel Front vehicle wheel 124 on frame；The rear end of each anterior cannula is provided with the front limit double wedge 125 matching with each front limit teeth groove；Anterior cannula It is set on a corresponding front sliding column, front torsion spring is set on corresponding front sliding column, and be located within anterior cannula；Set on front apron Boss 131 is connected, each front connection boss is provided with front-axle hole 132, front gathering bearing surface 133, front expansion bearing surface before having two 134 and the front arc transition face 135 that draws bearing surface and front expansion bearing surface before connecting in；The central axis of front-axle hole with front Launch the distance being more than this central axis and front gathering bearing surface b apart from a of bearing surface；Each front connection boss is by through front axle The bearing pin 100 of hole and a corresponding front pin-and-hole is rotated with front sliding column and is connected；Each front expansion bearing surface is located flat parallel to front apron Face, each bearing surface that draws in is perpendicular to front apron place plane.

（Application examples 1）

Fig. 7 to Figure 20 shows a kind of concrete application mode of above-described embodiment 1, and wherein Fig. 7 is using front frame group shown in Fig. 1 The Four-wheel foldable trailer that part is made is in a kind of perspective view during deployed condition；Fig. 8 be in trailer shown in Fig. 7 after A kind of perspective view of chassis assembly；Fig. 9 is that Rear frame component shown in Fig. 8 is a kind of three-dimensional when another angle is observed Structural representation；Figure 10 is a kind of side view of Rear frame component shown in Fig. 8；Figure 11 is one kind of Rear frame component shown in Fig. 8 Explosive view；Figure 12 is a kind of explosive view of Rear frame component shown in Fig. 9；When Figure 13 is that shown in Fig. 7, trailer is in flat A kind of perspective view；Figure 14 is a kind of perspective view of backboard in trailer shown in Figure 13；Figure 15 is Fig. 7 institute Show that trailer is in a kind of perspective view during preliminary folded state；Figure 16 is one kind of backboard and connector in Figure 15 Explosive view；Figure 17 is a kind of side view of trailer shown in Figure 15；Figure 18 is that a kind of structure of coupling mechanism in trailer shown in Fig. 7 is shown It is intended to；Figure 19 is that trailer shown in Fig. 7 is in a kind of perspective view during completely folded state；Figure 20 is to drag shown in Figure 19 A kind of side view of car.

Should use-case be a kind of Four-wheel foldable trailer made using above-described embodiment 1, including front frame assembly 1, after Chassis assembly 2 and the coupling mechanism 3 for coupling front frame assembly and Rear frame component.

Fig. 7 to Figure 12 should be seen by the concrete structure that is in during deployed condition of use-case, described front frame assembly includes front loading 11, two front wheel assemblies 12 of frame, the front apron 13 being arranged on front luggage carrier front end and the pull bar 14 being arranged on front apron； The left and right sides end of front luggage carrier front end is respectively provided with a front sliding column 111 projecting forward, and each front sliding column limits before being provided with annular Position gear platform 112, the front end that each front limit keeps off platform is provided with multiple front limit teeth groove 113；The front end of each front sliding column is provided with front pin-and-hole 114；Each front wheel assemblies include having the front wheel carrier 122 of anterior cannula 121, front torsion spring 123 and are rotatably arranged on front wheel carrier Front vehicle wheel 124；The rear end of each anterior cannula is provided with the front limit double wedge 125 matching with each front limit teeth groove；Anterior cannula is set in On a corresponding front sliding column, front torsion spring is set on corresponding front sliding column, and is located within anterior cannula；Front apron is provided with two Front connection boss 131, each front connection boss be provided with front-axle hole 132, front gathering bearing surface 133, front expansion bearing surface 134, with And before connecting, draw the front arc transition face 135 of bearing surface and front expansion bearing surface in；As shown in Figure 4, the central axis of front-axle hole It is more than this central axis with front expansion bearing surface apart from a with front gathering bearing surface apart from b；Each front connection boss pass through through The bearing pin 100 of front-axle hole and a corresponding front pin-and-hole is rotated with front sliding column and is connected；Each front expansion bearing surface is parallel to front apron institute In plane, each bearing surface that draws in is perpendicular to front apron place plane.

Rear frame component includes rear 21, two rear wheel assemblies 22 of luggage carrier, is arranged on the backboard of rear luggage carrier rear end 23 and for connecting two connectors 24 of backboard and rear luggage carrier.

The left and right sides end of luggage carrier rear end is respectively provided with a rearwardly projecting rear traveller 211 afterwards, and each rear traveller is provided with Limiting block platform 212 after annular, the rear end of each rear limiting block platform is provided with multiple rear spacing teeth groove 213；The rear end of each rear traveller is provided with Pin-and-hole 214 afterwards；The front end of each connector be provided with the first pivoted hole 241, rear draw in bearing surface 242, rear launch bearing surface 243, with And after connecting, draw the rear arc transition face 244 of bearing surface and rear expansion bearing surface in；Each connector with corresponding one after traveller lead to Cross the bearing pin 100 through the first pivoted hole and rear pin-and-hole 214 and rotate connection, the central axis of the first pivoted hole launches to abut with rear The distance in face is more than this central axis and the rear distance drawing bearing surface in；Launch bearing surface flat parallel to backboard place after each Face, each rear bearing surface that draws in is perpendicular to backboard place plane；The rear end of each connector is provided with and is connected for being rotated with backboard The second pivoted hole 245, draw load-carrying surface 246 in and launch load-carrying surface 247, draw load-carrying surface in and be located at the second pivoted hole away from the The side of one pivoted hole, launches load-carrying surface and is located at the second pivoted hole close to the side of the first pivoted hole；Each rear wheel assemblies include There is rear wheel frame 222, rear torsion spring 223 and the rear wheel 224 being rotatably arranged on rear wheel frame of rear sleeve 221；Each rear sleeve Front end is provided with the rear spacing double wedge 225 matching with each rear spacing teeth groove；Rear sleeve be set in corresponding one after on traveller, turn round afterwards Spring is set on traveller after accordingly, and is located within rear sleeve；Backboard is provided with two and connects boss 231, each rear connection afterwards Boss is provided with rear axis hole 232 and the load flange 233 along rear luggage carrier horizontal direction evagination；Boss and corresponding one is connected after each Individual connector is rotated by the bearing pin 100 through rear axis hole and the second pivoted hole and connects；Load flange is with rear connection boss During the second pivoted hole rotation, the gathering load-carrying surface of connector can be connected to and launch in load-carrying surface, and then the company of drive Fitting rotates.

As shown in Figure 18, should coupling mechanism 3 include being arranged on the two of the left and right sides end of front luggage carrier rear end in use-case Individual front coupling bar 31, the locating wheel 32 being fixedly installed on each front coupling bar, it is arranged on the left and right sides end of rear luggage carrier front end Two after coupling bar 33, the connection flange 34 being fixedly installed on each rear coupling bar, run through two after coupling bar can be along left and right The axostylus axostyle 35 that direction moves back and forth, two annulars being fixedly installed on axostylus axostyle keep off platforms 36, for providing reseting elasticity for axostylus axostyle Screw thread spring 37 and for rotating the attachment bolt assembly 38 connecting each rear coupling bar and a corresponding locating wheel；Each fixed The edge of position wheel is provided with two arc shaped locating notches 321 being centrosymmetric, and each annular gear platform is back and forth moving with axostylus axostyle In dynamic process, embed or remove in a corresponding locating notch；Described front frame assembly and Rear frame component can be around connection spiral shells Bolt assembly 38 overlaps after rotating 180 degree.

Should be in use-case, front apron is provided with the rotating junction 136 with pin-and-hole, front close to front one end connecting boss Plate is provided with two clamps 137 of protrusion away from front one end connecting boss；The bottom of pull bar is rotated with the rotating junction of front apron Connect, the middle part of pull bar can clamping connection between two clamps.In concrete practice, also pull bar can be fixedly installed on front apron.

Should use-case when being in deployed condition, as shown in Fig. 7 to Figure 12, the upper surface of front luggage carrier and rear luggage carrier is in Same plane, front luggage carrier and rear luggage carrier are coupled by coupling mechanism, and are embedded the positioning of corresponding locating wheel by locating wheel In breach, both are locked.Now in front frame assembly, front apron keeps off the front expansion on platform perpendicular to front luggage carrier, front limit Bearing surface 131 is parallel to front apron place plane, and is connected on the front end face of anterior cannula 121, after also making anterior cannula simultaneously Each front limit double wedge at end is embedded in corresponding front limit teeth groove, and front limit teeth groove rotates effect thus have restriction to anterior cannula Fruit is so that front vehicle wheel now, perpendicular to front luggage carrier place plane, can roll to realize normally towing.Rear frame component In, backboard is perpendicular to rear luggage carrier place plane, and the gathering that the rear load flange 233 connecting boss is connected to connector is held On power face 246, this gathering load-carrying surface in this condition, can prevent backboard from continuing to rotate forward；Rear exhibition in each connector Open bearing surface 243 parallel to backboard place plane, and be connected on the rear end face of corresponding rear sleeve so that rear sleeve front end Each after spacing double wedge be embedded in after in spacing teeth groove, afterwards spacing teeth groove thus there is restriction rotating effect to rear sleeve so that Rear wheel now, perpendicular to rear luggage carrier place plane, can roll to realize normally towing.

Should be in shown in the concrete structure as Figure 13 to Figure 14 of flat, under deployed condition shown in Fig. 7, outward by use-case Push dynamic backboard to rotate backward around rear axis hole, until load flange 233 is connected in the expansion load-carrying surface 247 of connector, this When backboard upper surface and rear luggage carrier upper surface be in same plane, in the spacing work of the expansion load-carrying surface 247 of connector With under, can prevent backboard from continuing to rotate backward；This structure can also serve as support board backboard and use, and be effectively increased and drag The loaded area of car.

Should be in shown in the concrete structure as Figure 15 to Figure 17 of preliminary folded state, in deployed condition shown in Fig. 7 by use-case Under, external force promotes forward backboard, because the load flange 233 on backboard is connected in the gathering load-carrying surface 246 of connector, Thus carrying follower link to rotate forward around the first pivoted hole 241, until rear gathering bearing surface 242 is located perpendicular to rear luggage carrier and puts down Face is simultaneously connected on the rear end face of rear sleeve, is somebody's turn to do because the central axis of the first pivoted hole is more than with the rear distance launching bearing surface Central axis and the rear distance drawing bearing surface in, can be in the bullets of rear torsion spring 223 so that rear sleeve is in the rotation process of connector Under power effect, sliding certain distance is so that remove, due to rear limiting tooth spacing double wedge spacing teeth groove after accordingly afterwards backward Groove no longer has restriction rotating effect to rear sleeve, so rear sleeve can drive rear wheel frame 222 under the twisting force of rear torsion spring And rear wheel 224 turn an angle after be connected on the basal surface of rear luggage carrier.In addition, under deployed condition shown in Fig. 7, outward Power promotes front apron backward, connects boss 131 and rotate backward around front-axle hole 132 before driving, until front gathering bearing surface 133 abuts On the front end face of anterior cannula, due to front-axle hole central axis with front launch bearing surface apart from a be more than this central axis with Front draw in bearing surface apart from b, so during the rotating backward of backboard, anterior cannula can sliding certain distance forward, make Obtain front limit double wedge to remove from corresponding front limit teeth groove, because front limit teeth groove does not have restriction rotation effect to anterior cannula Really, so anterior cannula can drive front wheel carrier and front vehicle wheel to turn an angle before being connected under the twisting force of front torsion spring On the basal surface of luggage carrier.

Use-case should be in shown in the concrete structure as Figure 19 to Figure 20 of completely folded state, tentatively folding shown in Figure 15 Under state, pressing axostylus axostyle 35 is so that axostylus axostyle overcomes the reseting elasticity of screw thread spring 37 and moves a certain distance so that being fixed on axle Annular gear platform on bar removes from a corresponding locating notch 321, such that it is able to folding carrier and rear luggage carrier, works as handle When front luggage carrier or rear luggage carrier rotation 180 degree make both overlap, namely the basal surface of front frame assembly is made to adjoin rear car After the basal surface of frame assembly, unclamp axostylus axostyle, axostylus axostyle moves under the reseting elasticity of screw thread spring 37 and resets so that annular keeps off platform Embed again in another locating notch 321 corresponding, lock front luggage carrier and rear luggage carrier so that both will not divide themselves Open.

In addition, a characteristic should also be had it is simply that after attachment bolt assembly 38 is pulled down by use-case, front frame assembly and after Chassis assembly all can independently become two-wheeled folding trailer；For front frame assembly, pull bar continues conduct and tows holding rod, Front luggage carrier continues as luggage carrier；But for Rear frame component, it is using the axostylus axostyle in Rear frame component as towing Holding rod, backboard is as support board.

Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not to this The restriction of the embodiment of invention.For those of ordinary skill in the field, acceptable on the basis of the above description Make other changes in different forms.There is no need to be exhaustive to all of embodiment.And these genus Among the obvious change extended out of spirit of the present invention or variation are still in protection scope of the present invention.

Claims

1. a kind of Four-wheel foldable trailer with coupling mechanism, including front frame assembly, Rear frame component and for connection before Chassis assembly and the coupling mechanism of Rear frame component；Front frame assembly includes front luggage carrier, two front wheel assemblies, be arranged on before The front apron of luggage carrier front end and be arranged on the pull bar on front apron；It is characterized in that：Front apron connects the one of boss close to front End is provided with the rotating junction with pin-and-hole, and front apron is provided with two clamps of protrusion away from front one end connecting boss；Pull bar The rotating junction of bottom and front apron rotates and is connected, the middle part of pull bar can clamping connection between two clamps；Rear frame component includes Afterwards luggage carrier, two rear wheel assemblies, be arranged on the backboard of rear luggage carrier rear end and be used for connecting backboard and rear luggage carrier Two connectors；The left and right sides end of luggage carrier rear end is respectively provided with a rearwardly projecting rear traveller afterwards, and each rear traveller sets There is limiting block platform after annular, the rear end of each rear limiting block platform is provided with multiple rear spacing teeth groove；The rear end of each rear traveller is sold after being provided with Hole；The front end of each connector is provided with the first pivoted hole, draws bearing surface afterwards in, launches bearing surface afterwards and draw in after connecting to abut Face and the rear arc transition face of rear expansion bearing surface；Each connector with corresponding one after traveller by through the first pivoted hole and after The bearing pin of pin-and-hole rotates and connects, the central axis of the first pivoted hole and the rear distance launching bearing surface be more than this central axis with after Draw the distance of bearing surface in；Launch bearing surface parallel to backboard place plane, each rear bearing surface that draws in is perpendicular to rear gear after each Plate place plane；The rear end of each connector is provided with for rotating, with backboard, the second pivoted hole being connected, drawing load-carrying surface and exhibition in Open load-carrying surface, draw load-carrying surface in and be located at the side away from the first pivoted hole for second pivoted hole, launch load-carrying surface and be located at the second pivot joint Hole is close to the side of the first pivoted hole；Each rear wheel assemblies include having the rear wheel frame of rear sleeve, rear torsion spring and are rotatably arranged on Rear wheel on rear wheel frame；The front end of each rear sleeve is provided with the rear spacing double wedge matching with each rear spacing teeth groove；Rear enclosure pipe box On traveller after being located at corresponding, rear torsion spring is set on traveller after accordingly, and is located within rear sleeve；Backboard is provided with two Boss is connected, each rear boss that connects is provided with rear axis hole and the load flange along rear luggage carrier horizontal direction evagination after individual；After each Connect boss and a corresponding connector and connection is rotated by the bearing pin through rear axis hole and the second pivoted hole；Load flange with During rear connection boss rotates around the second pivoted hole, gathering load-carrying surface and the expansion load-carrying surface of connector can be connected to On, and then carry follower link to rotate；The left and right sides end of front luggage carrier front end be respectively provided with one forward project front sliding column, each before Traveller is provided with annular front limit gear platform, and the front end that each front limit keeps off platform is provided with multiple front limit teeth groove；The front end of each front sliding column It is provided with front pin-and-hole；Before each front wheel assemblies include having the front wheel carrier of anterior cannula, front torsion spring and are rotatably arranged on front wheel carrier Wheel；The rear end of each anterior cannula is provided with the front limit double wedge matching with each front limit teeth groove；Anterior cannula is set in corresponding one On front sliding column, front torsion spring is set on corresponding front sliding column, and is located within anterior cannula.