CN1102162A - Bicycle trailer - Google Patents

Abstract

The present invention relates to a towbar of bicycle trailer, including a slender component, and one end of said component is equipped with an installing device fixed on the bicycle frame and positioned in the front of rear wheel axle, and another end of said component is equipped with second installing device which can be fixed on the trailer, and the described one end of said component has a horizontal pivot connecting piece which can make said component rotate round an axis in the front of rear wheel axle, and the described another end has a vertical pivot connecting piece and a pivot connecting piece which can be longitudinally extended along the axis on said component. Said arrangement can prevent the trailer from producing a force moment making the front of bicycle turn up under the static condition, and can reduce the force moment which is resulted from rolling resistance of trailer and makes the front of bicycle turn up under the dynamic condition.

Description

Bicycle trailer

The present invention relates to a kind of drawbar that is used for bicycle, particularly can be used for trailers, yet also be applicable to motor bike, mini-motorcycle, motor scooter and similar vehicles breakdown trailer.Such trailer has typically the single shaft form and a connection is arranged thereon and usually to the drawbar that applies some downward load on the bicycle.

Bicycle generally is used to ride instead of walk, but they also can be used to carry or carry the loan thing, and just arises at the historic moment for the various trailerses of this purpose.These trailers have been connected to usually near on one on the vehicle frame below the vehicle seat or among the back vent of vehicle frame, and at this place, trailing wheel stamen axle is fixed on the back vent.Because this arrangement is added to trailer load on the bicycle, it can make bicycle be difficult to handle and drive, and also limits the gyroscopic movement of the fabricate block of bicycle/trailer.

The present invention provides a kind of drawbar for trailers, the parts that comprise a prolongation of between bicycle and trailers, extending, end at these parts is used for these parts are fixed to the fabricated section of the cycle frame part that is in bicycle rear shaft anterior position place, other end at these parts is used for these parts are fixed to second fabricated section on the trailers, in use, these parts have one on the described end of these parts, as these parts around on the back axle of bicycle or just in time before it and/or below first articulated part of hinge of a horizontal shaft, in use, one or near the other end of these parts as around second articulated part of the hinge of the vertical axis at the rear portion of bicycle with the 3rd articulated part along the axle of this parts longitudinal extension is arranged, bicycle can rotate with respect to trailer around second articulated part thus,, avoid applying one thus and try hard to make the statical moment that the bicycle front portion tumbles and reduce as far as possible under current intelligence that rolling resistance by the trailer that is pulled produces with respect to trailer canting and the load that can be in vertical plane surface dump the trailer on the vehicle frame that acts between the bicycle wheels axle around the 3rd articulated part around the 3rd articulated part, the overturning couple that causes the bicycle front portion to be lifted.

With reference to the accompanying drawings special embodiment more of the present invention are described.Wherein:

Fig. 1 is the scheme drawing of an embodiment according to the bicycle/trailer combination body of drawbar of the present invention;

Fig. 2 is a planar view that is used for the drawbar device on the trailer; And

Fig. 3 is the transparent view of the attaching parts of an improved connection cycle frame;

Fig. 4 is the more detailed transparent view of improvement attaching parts shown in Figure 3; And

Fig. 5 to 7 and 8 to 18 has shown more embodiment of the present invention.

At first come referring to Fig. 1, shown in have a vehicle frame 11 with the overall bicycles that indicate of mark 10, it comprise on the front fork 12 that pivotally is installed in a front-wheel 13 of supporting and be bearing on the trailing wheel 16 on, following back vent 14,15.A trailer that is used for bicycle indicates with 17, and it comprises by the box-shaped loading bucket 18 that opens wide that is installed in wheel 19 supportings on the axle (not shown).Have one on the trailer totally with 20 drawbars that indicate, it couples together trailer and bicycle rack.Fig. 2 in conjunction with the accompanying drawings illustrates in greater detail drawbar now.

Drawbar 20 comprises a solid rigid rod 21 of elongated open core type, and it can be circular, square or similar cross-section.This bar has a hollow circuit cylinder lining 22 that is weldingly fixed on its front end, and the lining axis extends along the transverse horizontal of drawbar.In addition, bar and lining also can be the forms that is cast as one.A carriage 23 has a substrate 24, and the anchor clamps 25 of a pair of fixed interval are arranged on substrate 24, to admit and to be installed on in fork 25 is got off at bicycle rear shaft fwd rear portion.Be processed with the alternate lug of a pair of level 26 on the carriage 23, be processed with the hole 27 of inserting a pivot pin 28 on the lug 26, on an end of pivot pin 28, a head 29 is arranged and a hole 30 that is used for inserting spring cotter 31 or rod pin is arranged, so that this lock is fixed on the lug at the other end.The head 29 of pin 28 has an integral ring-shaped handle 29a so that the extraction of this pin.Lining 22 at the drawbar front end places between two lugs 26, the pin 28 that passes this lining extension allows drawbars around an axle pivoted of extending with respect to the transverse horizontal of the fore-and-aft direction of this drawbar, makes the upset relative to each other in a vertical not face of bicycle and trailer.The axle that carriage is designed to put pin 28 just with the front of hind axle, following or preceding below align, the basic load of trailer and its rolling resistance will can not make the front portion of the bicycle tipping that makes progress like this.

Drawbar 20 forms one usually with the pivotal joint of 35 expressions between the rearmost end that arrives bicycle foremost of trailer, be used for rotating around a vertical axis.This attaching parts comprises a vertically extending cylindrical shape lining 36 that is welded on the drawbar, and this lining is combined between two arms of U-shaped clamp 37 and by a rod pin 38 and is installed on the U-shaped clamp 37.A head 39 is arranged and be installed on the U-shaped clamp at an end of rod pin in the mode of spring cotter 40.Such layout can be rotated bicycle with respect to trailer around vertical axis, reach the purpose that turns to.

U-shaped clamp 37 is installed in the end of the stamen axle 41 that constitutes drawbar one end, and stamen axle 41 embeds in the bearing 42, and this bearing fixing makes bicycle to tilt/to wave around the axle of drawbar and with respect to trailer below car body 18 front ends of trailer.The front end of axle 41 have one can be with the head 43 of side contacts before the fabricated section rear end of axle 41 have a packing ring 44 and one axle be locked in spring cotter 45 in the lining.Process outwardly directed being used on the bearing 42 by the fixing flange 46 below the trailer of bolt (not shown).

Certainly the installation site of bearing on trailer will be determined according to the form and the structure of trailer, by trailer chassis or vehicle frame on the sponson forward of the trailer that the flange on the trailer body forms or downside be the proper site of fixing.

Allow the relative tipping of bicycle between the carriage on the cycle frame in order to be fixed on trailer at the front end of drawbar with drawbar, with horizontal pivot axle spare perpendicular plane in drawbar is arranged as rigidity, the downward load that is created on the bicycle by the load of trailer is applied between the front and back wheel shaft of bicycle, and under static state, such unidirectional action makes the two-wheeled of bicycle keep providing on the ground and not to make the bicycle front-wheel to be tumbled and the moment of built on stilts upwards.The adaptor union on the drawbar rear end 35 make drawbar articulation piece can relative to trailer around one just in time the axle after the bicycle rearmost end rotates, bicycle is not subjected to the restriction of bicycle with respect to the rotational angle of trailer like this, to allow the alerting ability of maximum.Drawbar descends slightly for the get off load of attaching parts guarantee effect on cycle frame of fork of bicycle, is acted on the bicycle and the make progress power of tipping of bicycle is restricted by what the rolling resistance of trailer produced under dynamical state like this.

Fig. 3 of accompanying drawing and 4 has shown the improved form of a carriage 23, and it is fixed on the Chain stay spare of bicycle rack.The triangle substrate 24 of carriage have one fixing or be integrally formed at elongate tubular anchor clamps 50 on the edge of substrate.These anchor clamps partly are made of two hull shapes that link together with hinge 51, so that open this anchor clamps, this is that the support 52 of setting is used for admitting Luo bolt 53 to be clamped on the frame part together to keep bracket portion for the support 52 that utilizes setting attaching/detaching from the frame part.On the other hand, this structure is similar to the above, and carriage 23 can be come out maybe can be cast into parts with hard plastic material with its anchor clamps 50 by metal work.By a pull bar 53 anchor clamps 50 are connected on the bevelled back vent of contiguous bicycle rack.By pull bar being installed on the vehicle frame at the bonding jumper 54 that extends on the frame part and be fixed on the pull bar by bolt 55.

Referring now to Fig. 5 to 7 of accompanying drawing,, a kind of improved trailer pattern and the drawbar that is attached to the bicycle rack rear portion have wherein been shown.Similar on the structure of drawbar itself and the features, in general to above-mentioned drawbar, and similar portions has been labeled identical label.

Shown in trailer comprise a vehicle frame that is generally rectangle 60 that is bearing on the bicycle quick 61.Has the U-girder 62 that is supporting a box-shaped wagon box 63 that on vehicle frame, is used for bearing load on the vehicle frame.

The structure of drawbar is haply with above-mentioned similar, but the front end of drawbar is different with respect to the erecting device of bicycle rack and is illustrated now with reference to Fig. 7.Carriage 23 comprises a V-type hard ware 64.It is combined in the rear portion of chain pole of bicycle rack and the bottom of vehicle seat pole.Carriage also comprises one towards the U-shaped seat 65 of the back of carriage and by 66 supports of a triangular web that extends forward.U-shaped seat 65 has laterally alternate lug 67, and the front lining 22 of trailer drawbar of can packing into of the size between them, and process the hole of inserting the pin 28 that is used for mounting bush on it makes the lining in the U-shaped seat rotate around the horizontal shaft along the horizontal expansion of bicycle.29 modes by the holder 68 on the outer lug that is fixed on the U-shaped seat by a Luo bolt 69 of pin are maintained on the U-shaped seat.

The V-arrangement arm of carriage is clipped on chain and the vehicle seat pole in conjunction with the outside of chain and vehicle seat pole and by backup plate 70 and bolt 71, the interior side contacts of backup plate 70 and chain and vehicle seat, and bolt 71 extends by hole in the carriage or seam and is connected with tapped bore in the backup plate.Make carriage be suitable for angle between vehicle seat and chain pole in the Luo bolt on carriage seam hole.

When carriage was assemblied on the bicycle, the U-shaped seat that is used for the drawbar end was positioned at carriage, by the U-shaped seat around the determined horizontal shaft of pivot of drawbar front end be roughly parallel to the hind axle of bicycle.

Yet another embodiment of the present invention is shown in Fig. 8 to 15.Come now referring to accompanying drawing, wherein the identical labelled notation of the usefulness of similar part has again again, and trailer and drawbar are same as aforesaid layout substantially, will find out this point significantly by the general layout of Fig. 8.As previously mentioned, its main difference is that carriage is installed to the form on the vehicle frame, and carriage comprises an outside foundry goods 80 in this case, for example be aluminium or iron, will in Fig. 9 to 14, be illustrated about it with reference to accompanying drawing.

This foundry goods comprises a base portion 81 in the chain pole rear portion and the corresponding vehicle seat pole bottom of bicycle one side.This base portion has a seat of general type that is installed in the front end of trailer drawbar along 82, one of the cylindrical shape linings of foundry goods horizontal expansion basically that is formed in the foundry goods posterior angle and is installed on the lining by the mode of a lateral pin 84.To sell by mode that the locking plate 85 on the present end is installed and to keep being present.As mentioned above, the axis of the rest pin 84 of designed foundry goods just in time with the front of hind axle, following or preceding below overlap, to avoid tumbling of any bicycle front portion that causes by trailer load.

This foundry goods has V-shaped groove 87(by one and sees Figure 16) backup plate 86 be fixed on the chain pole of bicycle rack, V-shaped groove 87 is used for holding the inboard and the Luo bolt 88 of vehicle frame.Preferably see Fig. 9, casting 81 forms a seam 91 and also has the backup plate 92 shown in Figure 17 and 18 in the position on the vehicle seat pole opposite of vehicle frame, and this backup plate has a V-shaped groove 93 so that hold vehicle frame and a bolt (not having diagram).The also processed convex body of upwards holding up 94 of backup plate 92 has a single-piece protrusion pin 95 in the long socket 96 on the rear side that is positioned at foundry goods thereon, to be adapted to the different oblique angle of chain pole as shown in Figure 9.Other difference structurally is a handle apparatus (not shown) at the front end of trailer drawbar, is used for using as the hand barrow trailer or trailer is being connected on the bicycle with the front control trailer.

Make bicycle have an angle and be convenient to place bicycle/trailer combination body, then keep bicycle to erect with respect to trailer.Be adjusted into 90 ° by angle with bicycle and trailer, cause pin 28 and 38 front ends of trailer that make parallel to each other to be fallen on the ground, thereby the fabricate block of bicycle/trailer can be fixed, and the constraint of trailer front portion makes the fabricate block of bicycle/trailer stablize when unattended and can prevent from again to remove.In fact, owing to being to cause the front portion of trailer to be landed when being in greater than 45 ° at bicycle with respect to trailer, it is unnecessary therefore bicycle being broken into off with the fingers and thumb 90 °.Alignd with the trailer front and back in the front and rear part of bicycle, thereby the front portion from lifting trailer on the ground, then the combination physical efficiency of bicycle/trailer is started.

Claims (8)

1, a kind of drawbar that is used for trailers, be included in an elongated member that extends between bicycle and trailers, one at parts one end, be used for that these parts are fixed to the chain pole of vehicle frame and be in erecting device on the anterior position of bicycle rear shaft, one this parts other end be used for these parts are fixed to second erecting device on the trailers, the parts that have one first articulated part on a described end of these parts are used to make the hinge axis of these parts around being on the bicycle rear shaft or a foremost and/or a following horizontal shaft, second articulated part that is positioned at or is adjacent to the other end of these parts, with in use around the jointed shaft at the vertical axis place that is positioned at the bicycle rear portion, and one have along the 3rd articulated part of the horizontal shaft of the longitudinal extension of parts, bicycle can rotate around second articulated part with respect to trailer thus, tilt and can be with respect to trailer around the 3rd articulated part around first articulated part tipping in vertical plane surface, owing to act on trailer load on the bicycle before it, between the hind axle, avoid under static state, producing the moment of the anterior tipping that makes bicycle thus, and reduce under dynamically as far as possible because any tilting moment that the bicycle front portion is lifted that the rolling resistance of trailer produces.

2, by the drawbar of claim 1, it is characterized in that being used for the connecting device that the described end with elongated member is connected to chain pole and comprise a carriage, the device that is used for being fixed on the chain pole is arranged on the carriage, and first pivot connector is between the described end and this carriage of elongated member.

3, by the drawbar of claim 2, it is characterized in that first pivot connector is included in the alternate lug of a pair of level on the carriage, at a lining of the described end of elongated member, have along hole of the horizontal expansion of parts and one lining is installed in a pivot pin between carriage two lugs.

4,, it is characterized in that the device that carriage is fixed on the bicycle rack is comprised that a pair of alternate clamping part is fixed in carriage or elongate tubular anchor clamps by the drawbar of claim 2 or 3.

5, by the drawbar of one of above-mentioned any claim, it is characterized in that the connecting device that the other end with elongated member is fixed in trailer comprises a lining, it has it is installed in device on the trailer, the mode that rotate with the longitudinal axis around these parts one end of elongated member is admitted and is installed in wherein, to provide described the 3rd pivot connector.

6, any drawbar of one of claim from the above mentioned is characterized in that second pivot connector comprises the U-shaped clamp and the pin attaching parts of the described other end of contiguous elongated member.

7, by the drawbar of claim 6, it is characterized in that U-shaped clamp/pin attaching parts comprise one on the part that is formed in elongated member U-shaped clamp and the lining on another part that is formed in these parts, this lining has an axle with respect to this parts horizontal expansion so that be placed between U-shaped clamp two arms, and lining is installed between U-shaped clamp two arms and as a pivot pin around the hinge of described vertical axis.

8, be used for trailers substantially as with reference to description of drawings and a kind of as shown in drawings drawbar.

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