Brief description of the drawings
Fig. 1 is a kind of perspective view of the present invention;
Fig. 2 adopts four-wheel folding trailer that backboard shown in Fig. 1 the makes a kind of perspective view in the time of 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 the assembly of front frame shown in Fig. 3;
Fig. 5 is a kind of side view of front apron in the assembly of front frame shown in 3;
Fig. 6 is a kind of explosive view of the assembly of front frame shown in Fig. 3;
A kind of explosive view of Fig. 7 when to be the assembly of front frame shown in Fig. 3 observe from another angle;
Fig. 8 be shown in Fig. 2 in trailer after a kind of perspective view of chassis assembly;
Fig. 9 is a kind of perspective view when chassis assembly is observed from another angle afterwards shown in Fig. 8;
Figure 10 is a kind of side view of rear chassis assembly shown in Fig. 8;
Figure 11 is a kind of explosive view of rear chassis assembly shown in Fig. 8;
Figure 12 is a kind of explosive view of rear chassis assembly shown in Fig. 9;
Figure 13 is a kind of perspective view of trailer shown in Fig. 2 in the time of flat;
Figure 14 is a kind of perspective view of backboard in trailer shown in Figure 13;
A kind of perspective view of trailer shown in Figure 15 Fig. 2 in the time of 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;
A kind of perspective view of trailer shown in Figure 19 Fig. 2 in the time of complete folded state;
Figure 20 is a kind of side view of trailer shown in Figure 19.
Shown in accompanying drawing, be labeled as: front frame assembly 1, front luggage carrier 11, front sliding column 111, front limit gear platform 112, prosodeticPosition 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 wheel124, front limit double wedge 125, front apron 13, front connection boss 131, front-axle hole 132, front gathering bearing surface 133, front exhibitionOpen bearing surface 134, front arc transition face 135, rotating junction 136, clamp 137, pull bar 14, rear chassis assembly 2, afterLuggage 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 is protrudingPlatform 231, rear axis hole 232, load flange 233, connector 24, the first pivoted holes 241, rear gathering bearing surface 242, rear exhibitionOpen bearing surface 243, rear arc transition face 244, the second pivoted holes 245, draw load-carrying surface 246 in, launch load-carrying surface 247, connectionConnection mechanism 3, front coupling bar 31, locating wheel 32, locating notch 321, rear coupling bar 33, connects 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, and the left and right sides end of backboard 23 plate body bottomsAfter being respectively provided with one, connect boss 231, each rear connection boss is provided with rear axis hole 232 and along rear luggage carrier horizontal direction evaginationLoad flange 233.
(application examples)
Should use-case be a kind of four-wheel folding trailer, see shown in Fig. 2 to Figure 20, comprise front frame assembly 1, rear chassis assembly 2With the coupling mechanism 3 for connecting front frame assembly and rear chassis assembly.
Should see Fig. 2 to Figure 12 by the concrete structure of use-case in the time of deployed condition, described front frame assembly comprises front luggage carrier11, two front wheel assemblies 12, be arranged on the front apron 13 of front luggage carrier front end and be arranged on the pull bar 14 on front apron;The left and right sides end of front luggage carrier front end is respectively provided with an outstanding front sliding column 111 forward, and each front sliding column is provided with annular front limitGear platform 112, 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 comprises having front wheel carrier 122, the front torsion spring 123 of anterior cannula 121 and rotate the front truck being arranged on front wheel carrierWheel 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 correspondingOn a front sliding column, front torsion spring set is located on corresponding front sliding column, and within being positioned at anterior cannula;
Front apron connects boss 131 before being provided with two, each front connection boss be provided with front-axle hole 132, front gathering bearing surface 133,Before front expansion bearing surface 134 and connection, draw the front arc transition face 135 of bearing surface and front expansion bearing surface in; See Fig. 5 instituteShow, the distance a of the central axis of front-axle hole and front expansion bearing surface is greater than the distance b of this central axis and front gathering bearing surface;Each front connection boss is rotationally connected with front sliding column by the bearing pin 100 through front-axle hole and a corresponding front pin-and-hole; Each front expansion is supportedJunction is parallel to front apron place plane, respectively draws bearing surface in perpendicular to front apron place plane.
Rear chassis assembly comprises rear luggage carrier 21, two rear wheel assemblies 22, is arranged on the backboard of rear luggage carrier rear end23 with two connectors 24 for being connected 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 annularRear limiting block platform 212, 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 rear pinHole 214;
The front end of each connector is provided with after the first pivoted hole 241, rear gathering bearing surface 242, rear expansion bearing surface 243 and connectionDraw the rear arc transition face 244 of bearing surface and rear expansion bearing surface in; After each connector and corresponding one, traveller is by through firstThe bearing pin 100 of pivoted hole and rear pin-and-hole 214 is rotationally connected, and the distance of the central axis of the first pivoted hole and rear expansion bearing surface is largeIn the distance of this central axis and rear gathering bearing surface; Each rear expansion bearing surface is parallel to backboard place plane, and each rear gathering is supportedJunction is perpendicular to backboard place plane; The rear end of each connector is provided with the second pivoted hole for being rotationally connected with backboard245, draw load-carrying surface 246 in and launch load-carrying surface 247, drawing load-carrying surface in and be positioned at the second pivoted hole away from one of the first pivoted holeSide, launches load-carrying surface and is positioned at the second pivoted hole and approaches a side of the first pivoted hole;
Each rear wheel assemblies comprises having rear wheel frame 222, the rear torsion spring 223 of rear sleeve 221 and rotate the rear car being arranged on rear wheel frameWheel 224; The front end of each rear sleeve is provided with the rear spacing double wedge 225 matching with each rear spacing teeth groove; Rear sleeve is set in correspondingAfter one, on traveller, rear torsion spring set is located on corresponding rear traveller, and within being positioned at rear sleeve;
Backboard connects boss 231 after being provided with two, each rear connection boss is provided with rear axis hole 232 and outside rear luggage carrier horizontal directionProtruding load flange 233; Each rear connection boss and a corresponding connector are by the bearing pin through rear axis hole and the second pivoted hole100 are rotationally connected; Load flange, in the process of rotating around the second pivoted hole along with rear connection boss, can be connected to connectorDraw load-carrying surface in and launch in load-carrying surface, and then driving connector to rotate.
As shown in Figure 18, in should use-case, coupling mechanism 3 comprises two of left and right sides end that are arranged on front luggage carrier rear endFront coupling bar 31, be fixedly installed on locating wheel 32 on each front coupling bar, be arranged on the left and right sides end of rear luggage carrier front endCoupling bar 33 after two, be fixedly installed on connection flange 34 on each rear coupling bar, run through two rear coupling bars can be along right and leftTo the axostylus axostyle 35 moving back and forth, be fixedly installed on axostylus axostyle two annular gear platforms 36, be used to axostylus axostyle that reseting elasticity is providedScrew thread spring 37 and for being rotationally connected the attachment bolt assembly 38 of each rear coupling bar and a corresponding locating wheel; Each locationThe edge of wheel is provided with two arc shaped locating notches 321 that are centrosymmetric, and each annular gear platform is moving back and forth along with axostylus axostyleIn process, embed or shift out in a corresponding locating notch; Described front frame assembly and rear chassis assembly can be around attachment bolt assembliesSuperimposed after 38 rotation 180 degree.
In should use-case, the one end that connects boss before front apron approaches be provided with the rotating junction 136 with pin-and-hole, front apronBe 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 rotated and are connectedConnect, 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 in the time of deployed condition, see shown in Fig. 2 to Figure 12, the upper surface of front luggage carrier and rear luggage carrier inSame plane, front luggage carrier and rear luggage carrier connect by coupling mechanism, and by locating wheel embed corresponding locating wheel location lackIn mouthful, both are locked. Now, in front frame assembly, front apron is perpendicular to front luggage carrier, and the front expansion on front limit gear platform is supportedJunction 134 is parallel to front apron place plane, and is connected on the front end face of anterior cannula 121, also makes anterior cannula rear end simultaneouslyEach front limit double wedge be embedded in corresponding front limit teeth groove, thereby front limit teeth groove has restriction rotating effect to anterior cannula,Make front vehicle wheel now perpendicular to front luggage carrier place plane, can roll to realize normally to tow. In rear chassis assembly, afterBaffle plate is perpendicular to rear luggage carrier place plane, and the load flange 233 that connects afterwards boss is connected to the gathering load-carrying surface of connectorOn 246, this gathering load-carrying surface, under this state, can prevent that backboard from continuing to rotate forward; Rear expansion in each connector is supportedJunction 243 is parallel to backboard place plane, and is connected on the rear end face of corresponding rear sleeve, makes the each of rear sleeve front endRear spacing double wedge is embedded in rear spacing teeth groove, thereby rear spacing teeth groove has restriction rotating effect to rear sleeve, makes nowRear wheel, perpendicular to rear luggage carrier place plane, can roll to realize normally to tow.
Should see shown in Figure 13 to Figure 14 in the concrete structure of flat by use-case, under deployed condition shown in Fig. 2,External force promotes backboard and rotates backward around rear axis hole, until load flange 233 is connected in the expansion load-carrying surface 247 of connector,Now the upper surface of backboard upper surface and rear luggage carrier is in same plane, at the spacing work of the expansion load-carrying surface 247 of connectorWith under, can prevent that backboard from continuing to rotate backward; This structure can also be used backboard as support board, effectively increase and dragThe loaded area of car.
Should see shown in Figure 15 to Figure 17 in the concrete structure of preliminary folded state by use-case, in deployed condition shown in Fig. 2Under, external force promotes forward backboard, because the load flange 233 on backboard is connected to the gathering load-carrying surface 246 of connectorUpper, thus drive connector to rotate forward around the first pivoted hole 241, until after draw bearing surface 242 in perpendicular to rear luggage carrier instituteIn plane and be connected on the rear end face of rear sleeve, because the central axis of the first pivoted hole and the distance of rear expansion bearing surface are greater thanThe distance of this central axis and rear gathering bearing surface, makes rear sleeve in the rotation process of connector, can be at rear torsion spring 223Under elastic force effect, slippage certain distance backward shifts out rear spacing double wedge, due to rear spacing from corresponding in spacing teeth grooveTeeth groove no longer has restriction rotating effect to rear sleeve, so rear sleeve can, under the twisting force of rear torsion spring, drive rear wheel frame222 and rear wheel 224 be connected on the basal surface of rear luggage carrier after turning an angle. In addition, in deployed condition shown in Fig. 2Under, external force promotes front apron backward, connects boss 131 and rotates backward around front-axle hole 132, until front gathering bearing surface before driving133 are connected on the front end face of anterior cannula, because the central axis of front-axle hole and the distance a of front expansion bearing surface are greater than this centerThe distance b of axis and front gathering bearing surface, so the rotating backward in process of backboard, anterior cannula is slippage one spacing forwardFrom, front limit double wedge is shifted out from corresponding front limit teeth groove, due to front limit teeth groove not anterior cannula is had restriction turnMoving effect, so anterior cannula can be under the twisting force of front torsion spring, drives front wheel carrier and front vehicle wheel to turn an angle and can be connected toOn the basal surface of front luggage carrier.
Should see shown in Figure 19 to Figure 20 in the concrete structure of complete folded state by use-case, tentatively folding shown in Figure 15Under state, press axostylus axostyle 35, make axostylus axostyle overcome the reseting elasticity of screw thread spring 37 and move a certain distance, make to be fixed onAnnular on axostylus axostyle gear platform shifts out from a corresponding locating notch 321, thereby can folding carrier and rear luggage carrier, whenFront luggage carrier or rear luggage carrier are rotated to 180 degree while making both superimposed, also make the basal surface of front frame assembly in abutting connection with rear carAfter the basal surface of frame component, unclamp axostylus axostyle, axostylus axostyle moves and resets under the reseting elasticity of screw thread spring 37, makes annular gearPlatform embeds in corresponding another locating notch 321 again, locks front luggage carrier and rear luggage carrier, and both can not divided themselvesOpen.
In addition, should also there is a characteristic by use-case, exactly after attachment bolt assembly 38 is pulled down, front frame assembly and afterChassis assembly all can independently become two-wheeled folding trailer; For front frame assembly, pull bar continues as towing holding rod,Front luggage carrier continues as luggage carrier; But for rear chassis assembly, be after axostylus axostyle in chassis assembly hold as towingHold bar, backboard is as support board.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not to thisThe restriction of bright embodiment. For those of ordinary skill in the field, can also make on the basis of the above descriptionThe variation that other is multi-form or variation. Here without also giving exhaustive to all embodiments. And these belong to thisThe apparent variation that bright spirit is extended out or variation are still among protection scope of the present invention.