CN2562627Y

CN2562627Y - Luggage castor structure

Info

Publication number: CN2562627Y
Application number: CN 02271985
Authority: CN
Inventors: 白阳丰
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-18
Filing date: 2002-07-18
Publication date: 2003-07-30
Anticipated expiration: 2012-07-18

Abstract

The utility model discloses a luggage-box bottom wheel structure, relates to technical field of the luggage box bottom wheel structure. The wheel structure includes a pull rod base (20) arranged at the bottom rear part of a box body (10) and capable of assembling a telescopic pull rod (12), a plurality of rollers (13) capable of rotating for 360 DEG and arranged at the four corners of the bottom part of the box body (10), a plurality of integrated and protruding wheel bases (21) arranged two ends of the bottom edge of the pull rod base respectively, and an auxiliary wheel (23) assembled in the wheel base via a wheel shaft; the auxiliary wheel (23) is arranged between two original rear rollers (13) which are positioned at rear bottom part of the box body (10), but not overlapped with the central line; the auxiliary wheel does not contact with ground when the box body (10) does not incline downwards, and contacts with ground together with the two rear rollers (13) when the box body incline downwards, two telescopic auxiliary supporting rods are further positioned on the pull rod base, an auxiliary plate is arranged between the two auxiliary supporting rods, and a front auxiliary roller (33) is further arranged at bottom center of the auxiliary plate, so when the luggage box is inclined downwards and pulled, the state that two rollers contact with the ground changes into that four rollers contact with ground to bear the gravity generated when the box inclines downwards, and the purposes of preventing inclination and tumbling of luggage box and facilitating pulling and controlling operations thereof are achieved.

Description

Luggage case return pulley structure

Technical field: luggage case return pulley structure of the present utility model relates to a kind of luggage case return pulley technical field of structures.

Background technology: present used luggage case return pulley structure, mainly contain two kinds: a kind of is " back dicycly ", the bottom half front end has support bar, the rear end bilateral be provided with orthoscopic, can not 360 the roller of degree rotation, another kind is " four-wheel-type ", i.e. four jiaos of rollers that are provided with rotatable 360 degree of bottom half; Two kinds of above-mentioned luggage case return pulley structures have only the two-wheeled kiss the earth when the casing state of having a down dip drags, be " 2 points " contact, it is few to support the ground area, and its balance and poor stability must the manpower application of force be controlled, taking precautions against casing topples over toward bilateral, especially fully loaded weight makes its center of gravity higher, the easier control of toppling over, require great effort, in addition, because casing produces a downward gravity when tilting, a bit support and have only under it, therefore must bear gravity, cause that hand is tired or ache with the portable pull bar of holding.

Summary of the invention: the purpose of this utility model provides a kind of luggage case that makes and is difficult for toppling over, spurring luggage case return pulley structure laborsaving, that be easy to control.

For achieving the above object, luggage case return pulley structure of the present utility model comprises the draw-bar seat of Gong the assembling telescopic lever that bottom, casing back is provided with, and four jiaos of rollers that are provided with rotatable 360 degree of bottom half, the bottom margin two ends of this draw-bar seat respectively are provided with wheel seat integrated and that protrude, the auxiliary wheel of useful wheel shaft assembling in the wheel seat, this auxiliary wheel is in behind the casing between original two rear rollers in bottom, not concentricity line, and when casing does not have a down dip, do not support ground, support ground simultaneously with two rear rollers when casing has a down dip.

Also being provided with two on described draw-bar seat has telescopic auxiliary support bar, is provided with accessory plate between this two auxiliary support bar, and also is provided with preceding auxiliary wheel in the bottom surface of accessory plate central authorities.

Luggage case return pulley structure of the present utility model is owing to added the auxiliary wheel of a pair of protrusion between the original rear roller of bottom half, on the not same center line, and when not having a down dip, do not support by casing ground, when casing has a down dip and two rear rollers support ground simultaneously, need have a down dip when dilatory when luggage case like this, contact to earth by two-wheeled and to become four-wheel and contact to earth, born the gravity when luggage case has a down dip, therefore can make luggage case steadily be easy to control, spur laborsaving, the auxiliary wheel that protrudes when luggage case is gone upstairs can contact the step vertical plane in addition, help luggage case to slide and go up step, spur laborsaving; Simultaneously on draw-bar seat, also be provided with two telescopic auxiliary support bar is arranged, between this two auxiliary support bar, be provided with accessory plate, and also be provided with preceding auxiliary wheel in the bottom surface of accessory plate central authorities, when luggage case is vertically placed, telescopic auxiliary support bar comes steady casing before and after preceding auxiliary wheel can being adjusted, especially casing has and can enlarge, when the auxiliary bag of marching of reduced volume is loaded with weight, when original four-wheel is not enough to balance, should before auxiliary wheel scope that just can adjust kiss the earth come balance box to be unlikely to topple over, so this structure can reach and is difficult for toppling over, spur laborsaving, the purpose that is easy to control.

Description of drawings: luggage case return pulley structure of the present utility model is described in more detail below in conjunction with accompanying drawing.

Fig. 1 is the perspective view of the utility model luggage case return pulley structure.

Fig. 2 is the status architecture schematic diagram that has a down dip of the utility model luggage case return pulley structure.

Fig. 3 is the structural representation of the utility model luggage case return pulley structure at bottom half.

Fig. 4 is present employed luggage case return pulley structure " back dicycly " structural representation.

Fig. 5 is present employed luggage case return pulley structure " four-wheel-type " structural representation.

The enforcement of technical scheme: by Fig. 4, shown in Figure 5, be two kinds of patterns of present employed luggage case return pulley structure, when casing 10 states of having a down dip drag, have only two-wheeled 13 kiss the earths, be " 2 points " contact, it is few to support the ground area, its balance and poor stability, must the manpower application of force control, taking precautions against casing topples over toward bilateral, especially fully loaded weight makes its center of gravity higher, easilier topple over, effort control, therefore luggage case return pulley structure of the present utility model has been improved design on the basis of said structure, shown in Fig. 1～3, luggage case return pulley structure of the present utility model comprises the draw-bar seat 20 of Gong the assembling telescopic lever 12 that bottom, casing 10 back is provided with, and four jiaos of rollers 13 that are provided with rotatable 360 degree in casing 10 bottoms, the bottom margin two ends of this draw-bar seat 20 respectively are provided with wheel seat 21 integrated and that protrude, the auxiliary wheel 23 of useful wheel shaft 22 assemblings in the wheel seat, this auxiliary wheel 23 is between original two rear rollers 13 in casing 10 bottoms, back, not concentricity line, and when casing 10 does not have a down dip, do not support ground, when casing has a down dip and two rear rollers 13 support ground simultaneously.

Also being provided with two on described draw-bar seat 20 has telescopic auxiliary support bar 31, is provided with accessory plate 32 between this two auxiliary support bar 31, and before the bottom surface of accessory plate 32 central authorities also are provided with auxiliary wheel 33.

When luggage case is vertically placed, telescopic auxiliary support bar 31 comes steady casing 10 before and after preceding auxiliary wheel 33 can being adjusted, especially casing 10 have can enlarge, the auxiliary bag 11 of marching of reduced volume is when being loaded with weight, when original four-wheel 13 was not enough to balance, this preceding auxiliary wheel 33 just can come balance box 10 to be unlikely to topple over the contract scope of adjusting kiss the earth of auxiliary support bar 31 Shens.

Claims

1. luggage case return pulley structure, the draw-bar seat (20) that comprises Gong the assembling telescopic lever (12) that bottom, casing (10) back is provided with, and four jiaos of rollers (13) that are provided with rotatable 360 degree in casing (10) bottom, it is characterized in that: the bottom margin two ends of this draw-bar seat (20) respectively are provided with wheel seat (21) integrated and that protrude, the auxiliary wheel (23) of useful wheel shaft (22) assembling in the wheel seat, this auxiliary wheel (23) is between casing (10) back original two rear rollers in bottom (13), not concentricity line, and do not support ground when not having a down dip at casing (10), when casing has a down dip and two rear rollers (13) support ground simultaneously.

2. luggage case return pulley structure according to claim 1, it is characterized in that: also being provided with two on described draw-bar seat (20) has telescopic auxiliary support bar (31), between this two auxiliary support bar (31), be provided with accessory plate (32), and also be provided with preceding auxiliary wheel (33) in the bottom surface central authorities of accessory plate (32).