CN105774868A

CN105774868A - Four-wheel folding trailer

Info

Publication number: CN105774868A
Application number: CN201610157748.1A
Authority: CN
Inventors: 胡妍
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-08-27
Filing date: 2013-08-27
Publication date: 2016-07-20

Abstract

The invention discloses a four-wheel folding trailer which comprises a front trailer frame assembly, a rear trailer frame assembly and a coupling mechanism. The coupling mechanism comprises front coupling rods, locating wheels, rear coupling rods, coupling protruding boards, a shaft rod, annular stop tables, a threaded spring and coupling bolt assemblies. The edge of each locating wheel is provided with two arc-shaped locating notches in central symmetry. In the process when each annular stop table moves in a reciprocating manner along the shaft rod, the annular stop table is embedded in or moved out of the corresponding locating notch. The front trailer frame assembly and the rear trailer frame assembly can rotate by 180 degrees around the coupling bolt assemblies and then are overlapped. The four-wheel folding trailer is convenient to carry and store.

Description

Four-wheel foldable trailer

Technical field

The present invention relates to trailer technical field, particularly relate to a kind of Four-wheel foldable trailer.

Background technology

People are commonly used to four-wheel trailer when article are carried in shopping, can save strength for user, but four-wheel trailer volume is general bigger at present, it is impossible to folding gathering, inconvenient to carry, take up room also very big when depositing.

Patent documentation CN202186404U discloses a kind of foldable luggage trolley, this car includes telescopic vehicle frame, its underpart is provided with the cylindrical push-pull bar being hinged with luggage truck weight tray, and described cylindrical push-pull bar top is provided with first annular groove, and first annular groove lower surface is provided with the first spiral-guide face；Fitting with vehicle frame after weight tray is folding, it is vertically arranged with vehicle frame after launching, and is used for carrying luggage；Weight tray is connected side and is provided with and fixes the vertical road wheel Stroke Control part being connected with described weight tray with vehicle frame；Wheel stand has and the second cannelure of described cylindrical push-pull bar adaptation socket, and the second cannelure upper surface is provided with the second spiral-guide face suitable with described first spiral-guide face, a fixing rotary torsion spring of taking a seat in the second cannelure；Push-pull bar is vertically arranged in the second cannelure, and the shaft hole sleeve of push-pull bar bottom is connected in the axle of vertical road wheel Stroke Control part；When weight tray launches, described vertical road wheel forms control piece and the second cannelure is formed pushing tow, guide under the combined effect in described first spiral-guide face and the second spiral-guide face and vertical road wheel moves and launches to both sides outward turning, when weight tray folds, wheel inward turning under the effect of described rotary torsion spring reclaims and vertically moves down simultaneously；Vehicle wheel after folding is along edge at the bottom of the weight tray protruded from 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 is owing to being the push-and-pull vehicle only having two-wheeled, and carrying dynamics is less, it is impossible to is widely used in factory floor and uses.

Summary of the invention

It is an object of the invention to provide one to reduce entirety and take up room, consequently facilitating the Four-wheel foldable trailer carried and deposit.

The technical scheme realizing the object of the invention is:

The present invention in use, drives outer connecting connector to rotate and self rotational angle spacing by load flange, and realizes folding, and effectively reduces entirety and takes up room, consequently facilitating carry and deposit.

Accompanying drawing explanation

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

A kind of perspective view when Fig. 2 is to adopt the Four-wheel foldable trailer that backboard shown in Fig. 1 is made to be in deployed condition；

Fig. 3 is a kind of perspective view of front frame assembly in trailer shown in Fig. 2；

Fig. 4 is a kind of side view of front frame assembly shown in Fig. 3；

Fig. 5 is a kind of side view of front apron in front frame assembly shown in 3；

Fig. 6 is a kind of explosive view of front frame assembly shown in Fig. 3；

Fig. 7 be front frame assembly shown in Fig. 3 from another angle observe time a kind of explosive view；

Fig. 8 is a kind of perspective view of Rear frame component in trailer shown in Fig. 2；

Fig. 9 be Rear frame component shown in Fig. 8 from another angle observe time a kind of perspective view；

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 a kind of perspective view when being in flat of the trailer shown in Fig. 2；

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

Trailer shown in Figure 15 Fig. 2 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；

A kind of structural representation of coupling mechanism in trailer shown in Figure 18 Fig. 2；

Trailer shown in Figure 19 Fig. 2 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.

nullIt is labeled as shown in accompanying drawing: front frame assembly 1，Front luggage carrier 11，Front sliding column 111，Front limit gear 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，Front arc transition face 135，Rotating junction 136，Clamp 137，Pull bar 14，Rear frame component 2，Rear luggage carrier 21，Rear traveller 211，Rear limiting block platform 212，Rear spacing teeth groove 213，Rear pin-and-hole 214，Rear wheel assemblies 22，Rear sleeve 221，Rear wheel frame 222，Rear torsion spring 223，Rear wheel 224，Rear spacing double wedge 225，Backboard 23，Rear connection boss 231，Rear axis hole 232，Load flange 233，Connector 24，First pivoted hole 241，Rear gathering bearing surface 242，Rear expansion bearing surface 243，Rear arc transition face 244，Second pivoted hole 245，Draw load-carrying surface 246 in，Launch load-carrying surface 247，Coupling mechanism 3，Front coupling bar 31，Location wheel 32，Locating notch 321，Rear coupling bar 33，Couple flange 34，Axostylus axostyle 35，Annular gear platform 36，Screw thread spring 37，Attachment bolt assembly 38，Bearing pin 100.

Detailed description of the invention

(embodiment 1)

The present embodiment is a kind of backboard for folding trailer, as shown in Figure 1, left and right sides end bottom backboard 23 plate body connects boss 231 after being respectively provided with one, connect boss and be provided with rear axis hole 232 and the load flange 233 along rear luggage carrier horizontal direction evagination after each.

(application examples)

Should use-case be a kind of Four-wheel foldable trailer, see shown in Fig. 2 to Figure 20, including front frame assembly 1, Rear frame component 2 and for coupling the coupling mechanism 3 of front frame assembly and Rear frame component.

Should see that Fig. 2 to Figure 12, described front frame assembly include 11, two front wheel assemblies 12 of front luggage carrier, the front apron 13 being arranged on front luggage carrier front end and the pull bar 14 being arranged on front apron by use-case concrete structure when being in deployed condition；The left and right sides end of front luggage carrier front end is respectively provided with a front sliding column 111 prominent forward, and each front sliding column is provided with annular front limit gear platform 112, and the front end of each front limit gear 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 includes having the front vehicle wheel 124 that the front wheel carrier 122 of anterior cannula 121, front torsion spring 123 and rotation are arranged on front wheel carrier；The rear end of each anterior cannula is provided with the front limit double wedge 125 matched with each front limit teeth groove；Anterior cannula is set on a corresponding front sliding column, and front torsion spring set is located on corresponding front sliding column, and is positioned within anterior cannula；

Front apron connects boss 131 before being provided with two, connect the front arc transition face 135 drawing bearing surface and front expansion bearing surface before boss is provided with front-axle hole 132, front gathering bearing surface 133, front expansion bearing surface 134 and connects in before each；As shown in Figure 5, the distance a of the central axis of front-axle hole and front expansion bearing surface is more than the distance b of this central axis Yu front gathering bearing surface；Connect boss before each to be rotationally connected with front sliding column by the bearing pin 100 through front-axle hole and a corresponding front pin-and-hole；Launching bearing surface before each and be parallel to front apron place plane, each bearing surface that draws in is perpendicular to front apron place plane.

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

The left and right sides end of rear luggage carrier rear end is respectively provided with a rearwardly projecting rear traveller 211, and each rear traveller is provided with limiting block platform 212 after annular, the rear end of each rear limiting block platform be provided with multiple after spacing teeth groove 213；The rear end of each rear traveller is provided with rear pin-and-hole 214；

The front end of each connector is drawn bearing surface in and is launched the rear arc transition face 244 of bearing surface afterwards after being provided with the first pivoted hole 241, rear gathering bearing surface 242, rear expansion bearing surface 243 and connecting；Each connector with corresponding one after traveller by being rotationally connected through the bearing pin 100 of the first pivoted hole and rear pin-and-hole 214, the distance of the central axis of the first pivoted hole and rear expansion bearing surface is more than the distance of this central axis Yu rear gathering bearing surface；Launch bearing surface after each and be parallel to backboard place plane, draw bearing surface after each in and be perpendicular to backboard place plane；The rear end of each connector is provided with the second pivoted hole 245 for being rotationally connected with backboard, draws load-carrying surface 246 in and launch load-carrying surface 247, draw load-carrying surface in and be positioned at second pivoted hole side away from the first pivoted hole, launch load-carrying surface and be positioned at second pivoted hole side close to the first pivoted hole；

Each rear wheel assemblies includes having the rear wheel 224 that the rear wheel frame 222 of rear sleeve 221, rear torsion spring 223 and rotation are arranged on rear wheel frame；The front end of each rear sleeve is provided with the rear spacing double wedge 225 matched with each rear spacing teeth groove；Rear sleeve be set in corresponding one after on traveller, rear torsion spring set be located at corresponding after on traveller, and be positioned within rear sleeve；

Backboard connects boss 231 after being provided with two, connect boss and be provided with rear axis hole 232 and the load flange 233 along rear luggage carrier horizontal direction evagination after each；Connect boss and a corresponding connector after each to be rotationally connected by the bearing pin 100 through rear axis hole and the second pivoted hole；Load flange, along with rear connection boss is in the process that the second pivoted hole rotates, can be connected to the gathering load-carrying surface of connector and launch in load-carrying surface, and then band follower link rotates.

As shown in Figure 18, use-case should include two the front coupling bars 31 being arranged on the left and right sides end of front luggage carrier rear end by coupling mechanism 3, it is fixedly installed on the location wheel 32 on each front coupling bar, it is arranged on coupling bar 33 after two of left and right sides end of rear luggage carrier front end, it is fixedly installed on the connection flange 34 on each rear coupling bar, run through coupling bar after two axostylus axostyle 35 that can move back and forth in left-right direction, it is fixedly installed on two annular gear platforms 36 on axostylus axostyle, for providing the screw thread spring 37 of reseting elasticity for axostylus axostyle, and for being rotationally connected each rear coupling bar and the attachment bolt assembly 38 of a corresponding location wheel；The edge of each location wheel is provided with two the arc shaped locating notches 321 being centrosymmetric, and each annular gear platform, in the process moved back and forth along with axostylus axostyle, embeds or removes in a corresponding locating notch；Described front frame assembly and Rear frame component can overlap after attachment bolt assembly 38 rotates 180 degree.

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

Should use-case when being in deployed condition, see shown in Fig. 2 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 and is coupled by coupling mechanism, and both is locked in the locating notch by location wheel embedding corresponding location wheel.Now in front frame assembly, front apron is perpendicular to front luggage carrier, front expansion bearing surface 134 on front limit gear platform is parallel to front apron place plane, and it is connected on the front end face of anterior cannula 121, also make each front limit double wedge of anterior cannula rear end be embedded in corresponding front limit teeth groove simultaneously, front limit teeth groove thus having restriction rotating effect to anterior cannula so that front vehicle wheel now is perpendicular to front luggage carrier place plane, it is possible to rolls to realize normally towing.In Rear frame component, backboard is perpendicular to rear luggage carrier place plane, and the rear load flange 233 connecting boss is connected in the gathering load-carrying surface 246 of connector, and this gathering load-carrying surface is in this condition, it is possible to prevent backboard from continuing to rotate forward；Rear expansion bearing surface 243 in each connector is parallel to backboard place plane, and it is connected on the rear end face of corresponding rear sleeve, the each rear spacing double wedge making rear sleeve front end is embedded in rear spacing teeth groove, rear spacing teeth groove thus having restriction rotating effect to rear sleeve, rear wheel now is made to be perpendicular to rear luggage carrier place plane, it is possible to roll to realize normally towing.

The concrete structure of flat should be in see shown in Figure 13 to Figure 14 by use-case, under deployed condition shown in Fig. 2, external force promotes backboard to rotate backward around rear axis hole, until load flange 233 is connected in the expansion load-carrying surface 247 of connector, now backboard upper surface is in same plane with the upper surface of rear luggage carrier, under the position-limiting action of the expansion load-carrying surface 247 of connector, can prevent backboard from continuing to rotate backward；This structure can also serve as support board backboard and use, and is effectively increased the loaded area of trailer.

nullThe concrete structure of preliminary folded state should be in see shown in Figure 15 to Figure 17 by use-case，Under deployed condition shown in Fig. 2，External force promotes forward backboard，Owing to the load flange 233 on backboard is connected in the gathering load-carrying surface 246 of connector，Thus band follower link rotates forward around the first pivoted hole 241，Until the rear bearing surface 242 that draws in is perpendicular to rear luggage carrier place plane and is connected on the rear end face of rear sleeve，Owing to the central axis of the first pivoted hole and the distance of rear expansion bearing surface are more than the distance of this central axis Yu rear gathering bearing surface，Make rear sleeve in the rotation process of connector，Can under the elastic force effect of rear torsion spring 223，Sliding certain distance backward，Spacing double wedge removal from corresponding rear spacing teeth groove after making，No longer rear sleeve is had restriction rotating effect due to rear spacing teeth groove，So rear sleeve can under the twisting force of rear torsion spring，Rear wheel frame 222 and rear wheel 224 is driven to be connected on the basal surface of rear luggage carrier after turning an angle.Additionally, under deployed condition shown in Fig. 2, external force promotes front apron backward, connect boss 131 before driving to rotate backward around front-axle hole 132, until front gathering bearing surface 133 is connected on the front end face of anterior cannula, due to the central axis of front-axle hole and the distance a of the front expansion bearing surface distance b more than this central axis Yu front gathering bearing surface, so rotating backward in process at backboard, anterior cannula can sliding certain distance forward, front limit double wedge is removed from corresponding front limit teeth groove, owing to anterior cannula is not had restriction rotating effect by front limit teeth groove, so anterior cannula can under the twisting force of front torsion spring, front wheel carrier and front vehicle wheel is driven to turn an angle on the basal surface that can be connected to front luggage carrier.

The concrete structure of completely folded state should be in see shown in Figure 19 to Figure 20 by use-case, under folded state preliminary shown in Figure 15, pressing axostylus axostyle 35, axostylus axostyle is made to overcome the reseting elasticity of screw thread spring 37 and move a certain distance, the annular being fixed on axostylus axostyle gear platform is removed from a corresponding locating notch 321, such that it is able to folding carrier and rear luggage carrier, when making both overlap front luggage carrier or rear luggage carrier rotation 180 degree, namely after making the basal surface of the adjacent Rear frame component of basal surface of front frame assembly, unclamp axostylus axostyle, axostylus axostyle moves under the reseting elasticity of screw thread spring 37 and resets, annular gear platform is made again to embed in another locating notch 321 corresponding, lock front luggage carrier and rear luggage carrier, both will not be separated themselves.

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

Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And the apparent change that these spirit belonging to the present invention are extended out or variation are still among protection scope of the present invention.

Claims

1. a Four-wheel foldable trailer, it is characterised in that: include front frame assembly, Rear frame component and for coupling the coupling mechanism of front frame assembly and Rear frame component；Rear frame component includes rear luggage carrier, two rear wheel assemblies, is arranged on the backboard of rear luggage carrier rear end and for connecting two connectors of backboard and rear luggage carrier；The left and right sides end of rear luggage carrier rear end is respectively provided with a rearwardly projecting rear traveller, and each rear traveller is provided with limiting block platform after annular, the rear end of each rear limiting block platform be provided with multiple after spacing teeth groove；The rear end of each rear traveller is provided with rear pin-and-hole；The front end of each connector is provided with the first pivoted hole, draw bearing surface in afterwards, launch bearing surface and connect afterwards after draw bearing surface and the rear rear arc transition face launching bearing surface in；Each connector with corresponding one after traveller by being rotationally connected through the bearing pin of the first pivoted hole and rear pin-and-hole, the distance of the central axis of the first pivoted hole and rear expansion bearing surface is more than the distance of this central axis Yu rear gathering bearing surface；Launch bearing surface after each and be parallel to backboard place plane, draw bearing surface after each in and be perpendicular to backboard place plane；The rear end of each connector is provided with the second pivoted hole for being rotationally connected with backboard, draws load-carrying surface in and launch load-carrying surface, draw load-carrying surface in and be positioned at second pivoted hole side away from the first pivoted hole, launch load-carrying surface and be positioned at second pivoted hole side close to the first pivoted hole；Each rear wheel assemblies includes having the rear wheel that the rear wheel frame of rear sleeve, rear torsion spring and rotation are arranged on rear wheel frame；The front end of each rear sleeve is provided with the rear spacing double wedge matched with each rear spacing teeth groove；Rear sleeve be set in corresponding one after on traveller, rear torsion spring set be located at corresponding after on traveller, and be positioned within rear sleeve；Backboard connects boss after being provided with two, connect boss and be provided with rear axis hole and the load flange along rear luggage carrier horizontal direction evagination after each；Boss and a corresponding connector is connected by being rotationally connected through the bearing pin of rear axis hole and the second pivoted hole after each；Load flange, along with rear connection boss is in the process that the second pivoted hole rotates, can be connected to the gathering load-carrying surface of connector and launch in load-carrying surface, and then band follower link rotates；Coupling mechanism includes two the front coupling bars being arranged on the left and right sides end of front luggage carrier rear end, it is fixedly installed on the location wheel on each front coupling bar, it is arranged on coupling bar after two of left and right sides end of rear luggage carrier front end, it is fixedly installed on the connection flange on each rear coupling bar, run through coupling bar after two axostylus axostyle that can move back and forth in left-right direction, it is fixedly installed on two annular gear platforms on axostylus axostyle, for providing the screw thread spring of reseting elasticity for axostylus axostyle, and for being rotationally connected each rear coupling bar and the attachment bolt assembly of a corresponding location wheel；The edge of each location wheel is provided with two the arc shaped locating notches being centrosymmetric, and each annular gear platform, in the process moved back and forth along with axostylus axostyle, embeds or removes in a corresponding locating notch；Described front frame assembly and Rear frame component can overlap after attachment bolt assembly rotates 180 degree；Described front frame assembly includes front luggage carrier, two front wheel assemblies, the front apron being arranged on front luggage carrier front end and the pull bar 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 prominent forward, and each front sliding column is provided with annular front limit gear platform, and the front end of each front limit gear platform is provided with multiple front limit teeth groove；The front end of each front sliding column is provided with front pin-and-hole；Each front wheel assemblies includes having the front vehicle wheel that the front wheel carrier of anterior cannula, front torsion spring and rotation are arranged on front wheel carrier；The rear end of each anterior cannula is provided with the front limit double wedge matched with each front limit teeth groove；Anterior cannula is set on a corresponding front sliding column, and front torsion spring set is located on corresponding front sliding column, and is positioned within anterior cannula.