CN2372164Y - Automatic retractable roller device - Google Patents

Abstract

The utility model discloses an automatic telescopic caster device for portable tools. The utility model is characterized in that a movable plate which is connected to and arranged on the lower end of a push and pull device is used for driving a main shaft of the caster device to rotate at a fixed angle for positioning. Thus, casters on both ends of the main shaft can automatically extend or shrink.

Description

Carry the automatic telescopic leg wheel apparatus of tool

The utility model refers to a kind of automatic telescopic leg wheel apparatus that carries tool especially for relevant a kind of tool caster wheel device that carries.

The utility model is alleged carries tool and comprises that mainly but a kind of mat manpower walks in tow, and to alleviate the instrument or the equipment of the hand-power burden that we guide and support, for example the baggage container of belt wheel walking, belt wheel walking takes thing bracket, hand barrow, food basket car or perambulator etc.

Count for convenience of description, following the utility model specification sheets all gives the generality narration with " carrying tool " speech.So for ease of lifting the corner explanation, specific embodiment of the utility model and graphic in, then only with baggage container example as an illustration, explanation earlier is as above.

As is generally known, carrying tool and be the modern out does shopping or travels one of indispensable main equipment, and belt wheel walking carry tool modern's shopping especially, carrying and tourism are liked, carrying in the tool of belt wheel walking, in the majority to use two-wheel to roll in early days, as long as will carry the pull bar of tool during walking pulls out, carry tool and just can tilt mode along with we walk in tow, compared with guiding and supporting with arm, really convenient many, make the tool that carries of belt wheel walking become our shopping between for the moment, the favorite of carrying and tourism, but general belt wheel walking carry tool, its castor is fixedly to be located on two corners of carrying the tool lower end, and the time spent can not shrink, and it is many that the practicality of carrying tool is reduced.Though being arranged, industry releases preferable four-wheel walking castor around here, though this castor can collapse in time spent not and carry in the tool, only must pull out with staff to make its stay bearing plate be launched into the location, and when not using, need lean on staff that stay bearing plate is folded again and can reach the purpose that folds, be operation often make finger by movable supporting plate clamping and injured, this is to be that locating of tool blemish in an otherwise perfect thing carried in a four-wheel walking, haves much room for improvement in fact.

Therefore, main purpose of the present utility model promptly is to provide a kind of automatic telescopic leg wheel apparatus that carries tool, make a push-pull device at fixed be drawn out to during default length, caster device is promptly opened voluntarily, and when this push-and-pull pushes, fold automatically, get rid of fully with the defective that will commonly use in the castor use.

Of the present utility model time a purpose is to provide a kind of automatic telescopic leg wheel apparatus that carries tool, and its push-pull device at fixed cooperates the main wheel rotation of castor in tooth bar and the gear driven and reaches the purpose of automatic opening and closing.

The utility model is in order to reach above-mentioned purpose and effect, the technological means that it adopted comprises that one is subjected to the push-pull device at fixed and of the pull bar that external force controls to be subjected to this push-pull device at fixed to control the caster wheel device, and this caster device comprises: one is installed in and carries caster wheel framework on the tool; One is hubbed on caster wheel on this framework; One is installed in the gear on the castor main shaft; One upper end and above-mentioned push-pull device at fixed bonded assembly movable platen device; One is located at the tooth bar on this movable platen device, and this tooth bar can be meshed or not be meshed with the gear on the above-mentioned castor main shaft; One usefulness is so that the closing appliance of this castor location; When this push-pull device at fixed is subjected to controlling of external force and up pulls out, this closing appliance is just because of the rising release of this movable platen device with this push-pull device at fixed, the hold-down arm that this castor main shaft is driven is able to carry outside the tool because of the engagement of above-mentioned rack and pinion drives to stretch out in toward inner rotary, when extending out to fixed point, this closing appliance just pins the hold-down arm of this castor automatically, held after making the caster device caster wheel extend out to fixed point outward, for use; Anti-, when this push-pull device at fixed was subjected to external force to control past pressing down, its course of action was held after making the caster device caster wheel be contracted to fixed point on the contrary fully mutually.

Above-mentioned and other purpose of the present utility model, effect and characteristics high-ranking officer are distinct increasingly with the example that the carries tool one baggage container specific embodiment of following accompanying drawing.

Brief description of drawingsfig:

The 1st figure is the block diagram of the utility model baggage container of one of carrying tool;

The 2nd figure is a three-dimensional exploded view of the present utility model;

The 3rd figure is the amplification three-dimensional exploded view of the utility model caster device;

4A to 4C figure is caster device of the present utility model is transferred to the state of stretching out by contraction state a front elevation;

5A and 5B figure are the utility model caster device is transferred to the state of stretching out by contraction state top view;

6A to 6C figure is the utility model caster device is transferred to the state of stretching out by contraction state a lateral plan.

The major part conventional letter: open segment 334 second tilting sections 335 second locking sections 35 gear bars 40 castors 41 main shafts 42 support arms 421 first locating holes 422 second locating holes 43 were taken turns body 44A, 44B locking pin 441 outer end 442T shape head 446C shape fastener 45 gears in the middle of 10 push-pull device at fixed, 11 separators, 110 epimere inner tube 110A anchored 311 liang of side guidances of section's 120 upper end fixed jacket pipes 121 hypomere inner tubes, 122 fastening claw 123 expanded hole sections, 20 caster device 21 frameworks, 31 seat boards, 32 movable platens, 33 guiding pieces, 330 guide grooves, 331 first locking sections, 332 first tilting sections 333

Shown in the 1st to 5 figure, the automatic telescopic leg wheel apparatus that carries tool of the present utility model, mainly comprise: the interior pipe unit 10 of trunk draw bar device and a caster device 20, this caster device 20 comprises a framework 21, a movable platen 32 that is connected with the lower end of interior pipe 10 is established in the centre of this framework 21, one is located at the tooth bar 35 on the movable platen, one is hubbed on framework 21 both sides has main shaft 41 caster wheeles 40, one is fixed on gear 45 on castor 40 main shafts 41 and a usefulness so that castor 40 terminates in the closing appliance 44A of location, 44B etc., wherein, this movable platen 32 is to slide up and down in two side guidance 311-311 of a seat board 31, shown in the 3rd and 5 figure, this castor 40 comprises that one is hubbed on the main shaft 41 on framework 21 both sides, two outside rigid castors hold-down arms 42 at the framework 21 of main shaft 41, hold-down arm 42 can be rotated with main shaft 41, second end of hold-down arm 42 is with rotatable mode tight pulley body 43, as the 1st, 2, shown in 4C and the 5B figure, near first end of hold-down arm 42 both sides near the axis hole of main shaft 41 are established first knock hole 421 and second knock hole 422 respectively, shown in the 3rd and 6 figure, midway location at castor main shaft 41 sets firmly gear 45, and on the midway location of movable platen 32, up extend the tooth bar 35 that a higher position is set, so that when movable platen 32 slides up and down, this tooth bar 35 can be meshed with the gear 45 on being located at castor main shaft 41; This movable platen 32 respectively is provided with the tortuous guiding piece 33 of double-bank respectively on the both sides of tooth bar 35, in the middle of this guide member 33 guide groove 330 is arranged, can make closing appliance 44A, the mobile jib of the inner T shape head 442-442 of 44B passes this guide groove 330 and makes T shape head 442-442 slide against on the zigzag section face of each section two inner faces of tortuous guiding piece 33, by 3-4 figure as can be known, this guiding piece 33 from top to bottom forms the first locking section 331 successively respectively, first tilting section 332, middle open segment 333, five zigzag sections such as second tilting section 334 and the second locking section 335, the zigzag section system of this two guiding piece 33 is in order to the usefulness of the positioning action of the hold-down arm 42 of guiding castor 40, shown in the 3rd and 4 figure, the locking tip 44A of this hold-down arm 42,44B system is located at respectively with main shaft 41 and parallels the position, this locking tip 44A, the outer end 441 of 44B is that the tip terminates in first knock hole 421 or second knock hole 422 of hold-down arm 42 respectively, and this locking tip 44A, 442 on the inner T shape head of 44B is detained the inner edge position (seeing also the 3rd to 5 figure) that terminates in double guiding piece 33 set on above-mentioned movable platen 32 both sides respectively, and locking tip 44A, 44B respectively is subjected to a spring 443-443 one C shape fastener 446-446 and locking tip 44A, the effect of the common springings of forming of the card ditch 445 on the 44B and often keep outstanding effect form outwardly, make except in operating process, this locking tip 44A, 44B system is in when stretching transformation condition, beginning is directed on the middle open segment 333 of tortuous guiding piece 33, shown in 4B figure.Usually when the contraction state of castor 43, shown in 4A, 5A and 6A figure, locking tip 44A, 44B are that the tip terminates on the first knock hole 421-421 respectively, in like manner, castor 43 is when the state that stretches out, shown in 4C, 5B and 6C figure, locking tip 44A, 44B are that the tip terminates on second knock hole 422 respectively, no matter thereby to make castor 43 be to shrink or stretch out state to give the tip by locking tip 44A and 44B and end and locate.

Please consult the 4th to 6 figure again, set forth as afterwards with regard to use of the present utility model: when push-pull device at fixed 10 (or the pull bar 80 shown in the 1st figure) when being drawn out, the movable platen 32 that push-pull device at fixed 10 lower ends are connected with will with toward rising, make the top of the tortuous guiding piece 33 on movable platen 32, promptly the second locking section 335 is drawn toward the border of rising, the locking tip 44A that makes to the first knock hole 421 row blocking functions of castor 40 hold-down arms 42,44B will give release, promptly in locking tip 44A, in the middle of the inner T shape head 442-442 of 44B is entered via second tilting section 334 by the second locking section 335 of tortuous guiding piece 33 during open segment 333, shown in 4B figure, this locking tip 44A, 44B is release simultaneously just, the effect that makes the gear 45 on hold-down arm 42 main shafts 41 of this castor 40 up drawn high by the tooth bar 35 on the movable platen 32 is stretched out toward inner rotary immediately and is carried the outer as 4C of tool, shown in 5C and the 6C figure, when the hold-down arm 42 of castor 40 reaches the location, because push-pull device at fixed 10 continues up to draw, so locking tip 44A, the inner T shape head 442-442 of 44B also with first tilting section 332 by tortuous guiding piece 33 enter the first locking section 331, locking tip 44A then, the two outer end 441-441 of 44B just detain second of the hold-down arm 42 that terminates in castor 40 and decide in the hole 422 (part 6C figure), make carry tool can be at castor 40 by locking tip 44A, be used under the situation of 44B locking.Anti-, fold its push-pull device at fixed 10 when pressing down when carrying tool desire row, its operating process is just opposite with above-mentioned operation, even locking tip 44A, 44B are slided to the second locking section 335 by the first locking section 331 of guiding piece 33, the hold-down arm of castor 40 transfers contraction state to by the state of stretching out in the order, shown in 4A, 5A and 6A figure.

In addition for tooth bar 35 and gear 45 engagement on the castor main shaft 41 are concerned for the purpose of the push-and-pull stroke limitation that does not influence push-pull device at fixed, in a preferred embodiment of the present utility model, system will add a disengagement gear 11 between the junction, upper end of the lower end of push-pull device at fixed 10 and caster device 20, the structure that when push-pull device at fixed 10 further up draws, can separate voluntarily, promptly shown in 4C and 6C figure, when the hold-down arm 42 that up is pulled to caster device 20 caster wheeles 40 by push-pull device at fixed 10 when movable platen 32 stretches out outward fully, promptly separate with the upper end of movable platen 32 these push-pull device at fixed 10 lower ends, this disengagement gear 11 is in a preferred embodiment of the present utility model, shown in 4A-6A figure, comprise that one has in the epimere that anchors the 110A of portion pipe 110 and has that pipe 121 and one upper end has expanded hole 123 fixed jacket pipes 120 in the hypomere that fastens claw 122, this disengagement gear 11 be utilize pipe 121 in the hypomere fastening claw 122 freely open characteristic, when the 110A of the portion that anchors of pipe 110 enters outer tube 120 by expanded hole portion 123 in epimere, it is open-shaped when fastening claw 122 terminates in expanded hole 123 places, when pipe 110 down further advances again in the epimere, because of the internal diameter below pipe 121 the upper end expanded hole portion in the hypomere less, this fastening claw 122 is contracted toward in and be held in the neck of the 110A of the portion that anchors of pipe 110 in the epimere, so when sliding in the outer tube 120 of pipe 110 pipe 121 in hypomere in the epimere, on, pipe 110 in the hypomere, 121 all are combined into one, only after the head of the 110A of the portion that anchors of pipe 110 in the epimere is pulled out the expanded hole portion 123 of outer tube 120, two separate at once, and make the upper end fastening claw 122 of pipe 121 in the hypomere terminate in the upper end of outer tube 120 and be open claw-like, so that when pipe moves down in the epimere, all right one way or the other combination voluntarily, so push-pull device at fixed 10 of the present utility model may further include a disengagement gear 11 with centrifugation, its purpose is to make push-pull device at fixed to uphold and does the time spent, be unlikely the stretching travel of push-pull device at fixed is restricted, and can simplify the associated mechanisms and the assembly of caster device 20, so this disengagement gear 11 is not to fill to want element in the utility model, promptly do not use disengagement gear 11, still do not hinder the running of caster device in of the present utility model, sincerely Chen Ming.

In sum, caster device of the present utility model can be controlled automatically by the push pull maneuver of a push-pull device at fixed, and not only simple structure practicality, and the innovation of spatial shape genus should fully meet novel patent requirement.

Claims (2)

1. automatic telescopic leg wheel apparatus that carries tool comprises:

One is subjected to the push-pull device at fixed and of the pull bar that external force controls to be subjected to this push-pull device at fixed to control the caster wheel device, and it is characterized in that: this caster device comprises: one is installed in and carries caster wheel framework on the tool; One is hubbed on caster wheel on this framework; One is installed in the gear on the castor main shaft; One upper end and above-mentioned interior pipe unit bonded assembly movable platen device; One is located at the tooth bar on this movable platen device, and this tooth bar can be meshed or not be meshed with the gear on the above-mentioned castor main shaft; One usefulness is so that the closing appliance of this castor location.

2. the automatic telescopic leg wheel apparatus that carries tool according to claim 1, it is characterized in that: wherein, be provided with between this push-pull device at fixed and the caster device with so that push-pull device at fixed be drawn out to and make the caster device caster wheel stretch out fully and stop the disengagement gear that this push-pull device at fixed and the annexation of caster device are separated automatically behind the location.

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