CN102069828A

CN102069828A - Handcart capable of restoring rear-wheel direction

Info

Publication number: CN102069828A
Application number: CN200910191537XA
Authority: CN
Inventors: 陈和
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-24
Filing date: 2009-11-24
Publication date: 2011-05-25

Abstract

The invention provides a handcart capable of restoring a rear-wheel direction. In the handcart, one or more conventional trundles are arranged on the front part of the handcart, and a direction-recoverable bias-pressure trundle is arranged on the rear part of the handcart. At present, the common handcarts are divided into two types basically, wherein one type of the handcarts with the conventional trundles on the front part and a directional wheel on the rear part have the defects that the handcart cannot move towards the side direction and is not flexible, and the other type of the handcarts with conventional trundles on both front and rear parts have the defects that the handcart is unstable, is arduous in the control of direction of the handcart and particularly is difficult to control in case of heavy load. The handcart provided by the invention maintains the advantages of the two types of the handcarts comprehensively in the industry at present and overcomes the disadvantages thereof.

Description

The recoverable hand barrow of trailing wheel direction

Technical field

The present invention proposes a kind of hand barrow, can be used as the shopping cart in department store, grocery store or supermarket, also can locate to do transport truck in house decoration shop, warehouse, nursery, laboratory, workshop etc. and use.Exactly, hand barrow of the present invention is to have a upright framework, the user with hand push it, it is driven and turn to.

Background technology

The hand barrow of various shopping or cargo transport usefulness is by being known in the industry.Wherein, the shopping usefulness hand barrow have two kinds of different types at least, for convenience of explanation for the purpose of, hereinafter they are abbreviated as US mode and European pattern.

American shopping cart tends to, and two conventional caster wheeles are housed in its front portion, and the fixing wheel of both direction is housed at its rear portion.As everyone knows, so-called castor is exactly that it has two rotating shafts usually, a wheel shaft that is is located at the center of wheel, and wheel can rotate around wheel shaft, also have one and be provided in a side of rotating shaft on the wheel carrier, this wheel carrier rotating shaft and wheel shaft are perpendicular, and whole wheel can be rotated around the wheel carrier rotating shaft, and wheel also just can roll by one way or another, as not having the wheel carrier rotating shaft, wheel can only roll towards fixed-direction.The Undercarriage structure of American shopping cart is located at the top of back directional wheel.Often have one on the Undercarriage structure and control handgrip, car can be promoted and turn to by it.When on controlling handgrip, being applied in a power that turns to, being contained in the fwd castor and making the user be easy to change the direction of wheel, thereby car is turned to.The fixing trailing wheel of direction can not turn to, and only follows the direction of front-wheel merely.In case of necessity, also can only on the floor, turn to as integral body.Because the direction of trailing wheel is fixed, so car is can not be towards side rolling.As making the car shifted laterally, the user often will mention the rear end of car, with muscle power with car towards shifted laterally.This may be the thing of an effort, also have potential danger and take place, especially when the car heavy duty, be more as.Another kind of mode is to roll car forward, and then rolls backwards, perhaps will make scroll forward and backward many times, also can make car shifted laterally (similar to the technology of Parallel parking), and this will spend some time and strength.

The European plan shopping cart often is that four castors are arranged with American different, and two forwardly, and two at the rear portion.Used the shopping cart of four castors, not only can be similar to American shopping cart forward with turn to rolling, and easy side rolling is because castor can be supported the motion of one way or another.This configuration is particularly useful for handling car in less or crowded occasion, and for example car can easily be done the action that sideway movement allows others pass through or the like.Yet the car of four castors is crossed and is easy to do multidirectional motion, and the shortcoming of this configuration just makes car not quite stable.What the user thought is will make oneself to move with suitable straight line, so the user will be applied to controlling on the handgrip of this hand barrow with the power of constant adjusting direction, usually hard for the direction of controlling car, especially when the car heavy duty, seemed difficulty more.

Therefore, need a kind of hand barrow of exploitation, it will have the stable benefit of direction of American hand barrow, also will have the advantage that European hand barrow is easy to sideway movement.

Summary of the invention

As described above as can be known, the objective of the invention is to prepare a kind of hand barrow of shortcoming in the industry that overcomes at present; The hand barrow for preparing comprehensive American hand barrow of a kind of energy and European hand barrow advantage.This new-type hand barrow of the present invention's preparation, its rear portion is equipped with and can be restored the direction caster wheel, and one or more conventional caster wheeles are equipped with in its front portion, and this hand barrow can be realized the above-mentioned purpose relevant with other,

The experience personage is arranged in the industry check being described in detail hereinafter in conjunction with drawing after, can further understand characteristics of the present invention and other advantages associated.

Description of drawings

Fig. 1 is the transparent view according to a kind of hand barrow proposed by the invention.

Fig. 2 has bias voltage orientating function caster wheel, an a kind of lateral plan of embodiment according to proposed by the invention.

Fig. 3 has bias voltage orientating function caster wheel, a lateral plan of another embodiment according to proposed by the invention.

Fig. 4-7 is transparents view of four kinds of hand barrows, and they have disposed bias voltage direction-caster proposed by the invention.

Fig. 8 is a kind of transparent view of buggy, and it is to have disposed bias voltage direction-caster proposed by the invention.

Fig. 9-the 10th, according to the transparent view of a kind of hand barrow proposed by the invention, its trailing wheel can and not have between the state of bias voltage orientation at the state of bias voltage orientation to be changed.

These above examples will describe in detail hereinafter.

The specific embodiment

Consult Fig. 1, this is the transparent view of a kind of hand barrow 10 embodiments proposed by the invention.Hand barrow 10 preferably comprises the bottom platform or the underframe 12 that are installed in the load-bearing on the four wheels 21-24.Anterior two

wheel

21,22 preferably conventional caster wheeles, or similar wheel.Two wheels in

rear portion

23,24 preferably can restore direction, or have bias voltage orientating function caster wheel.Control that the framework of usefulness or support 40 preferably extend upward out from platform 12, handgrip 50 (or other parts of shaking hands) preferably is installed on the support 40, or with support 40 global formations.Handgrip 50 preferably is provided with to such an extent that be convenient to take and hold, and is beneficial to the user and promotes (or pulling) and turn to.Basket 60 can stretch out forward from support 40 and handgrip 50.The hand barrow 10 that has basket 60 almost has been exactly a representative type supermarket shopping car.Should be noted that the present invention has comprised that also those are not with the hand barrow of typical basket.Include in other the hand barrow: platform 12 and those hand barrows of controlling framework/handgrip only are set, (for example: the hand barrow of transportation log etc.) replace those hand barrows of basket, those hand barrows of having (common in the nursery) those hand barrows of one or more layers shelf and the supporting structure that is suitable for supporting some article being housed with one or more plates.Wherein some can be discussed hereinafter.

Consult Fig. 2, this is a kind of lateral plan with the embodiment that can restore direction caster wheel 123 proposed by the invention.The

trailing wheel

23,24 of Fig. 1 hand barrow 10 can constitute with restored concerning the direction caster wheel as wheel 123.

Can restore the direction caster wheel and be applied in the bias voltage caster wheel exactly, this bias voltage makes castor along a certain assigned direction orientations.Yet when castor has been applied in the power different directions of another and bias voltage, or during opposite external force, it can also rotate whole castor towards other direction.After another external force was removed, bias voltage made the orientation of castor turn back to original assigned direction.This bias voltage can utilize gravitational field to apply, and the weight of goods can be pressed to the caster wheel that tilted on determined that direction of its bevelled wheel frame axle; This bias voltage also can apply by enough mechanical forces, and for example with the spring that Fig. 3 discussed, or other biasing force or mechanism implement.

Illustrate wheel assembly 123 on Fig. 2, it comprises wheel 70, wheel shaft 71 and the wheel carrier 72 that supports wheel shaft.Wheel carrier 72 preferably rotatably is assemblied in the bottom of car, and wheel carrier 72 is provided with wheel carrier rotating shaft 74, and wheel carrier rotating shaft 74 has an angle that turns forward.From scheming to go up as seen, wheel carrier rotating shaft 74 on the wheel carrier and the angle between the vertical line are β, and the inclination angle between castor and the horizon is α.These two angles equate that its magnitude range can be 3-40 °, and best scope is 5-20 °, and the angle of drawing on Fig. 2 approximately is 10 °.

Wheel carrier rotating shaft 74 on the wheel carrier is to be in perpendicular bottom the car vertical plane, and this vertical plane is consistent with car straight line direction forward.When hand barrow 10 pushed away forward, the trailing wheel that has been applied in bias voltage was to be in straight line direction forward, and controlling of this hand barrow is similar to the hand barrow of US mode, and the trouble during turning has been lacked, and expection property is many.Yet, when desire during, venerate and will push away or draw this hand barrow towards side direction with the hand barrow shifted laterally, just can make

trailing wheel

23,24 towards side rolling, hand barrow has also moved towards this direction unimpededly.After removing external force side direction, the counteracting bias voltage, trailing wheel returns to their original straight directions forward.Use this way, on a hand barrow, can possess the advantage of US mode hand barrow and the advantage of European pattern hand barrow simultaneously, and not have their shortcomings separately.

Consult Fig. 3, this another kind that is the present invention proposes has the lateral plan bias voltage orientating function, that can restore the embodiment of direction caster wheel 223.The wheel 23 of the hand barrow 10 shown on Fig. 1 and 24 can constitute with wheel 223.The function of wheel assembly 223 shown in Figure 3 is similar to wheel assembly 123 shown in Figure 2.It comprises wheel 80, wheel shaft 81 and the wheel carrier 82 that supports wheel shaft.Wheel carrier 82 rotatably is assemblied in the bottom of car, and is identical with the assembly method of conventional castor.Yet, not exist together be that wheel carrier 82 has also connected one and restores the biasing spring 85 that direction is used, or similar parts.The position of sound production of spring 85 is that requirement produces direction bias voltage forward, acts on the wheel carrier 82, then acts on the wheel 80, is added with the rolling of the wheel 80 of bias voltage, is keeping straight direction forward.If apply the external force of a side direction on hand barrow, it is that power with spring offsets, and also can allow the rotation of wheel 80, make the user easily go-cart towards shifted laterally.After the external force of offsetting bias voltage was cancelled, wheel turned back to direction forward immediately.This set and the wheel setting that has deflection shown in Figure 2 provide American hand barrow and both advantages of European hand barrow equally, and have removed their shortcoming.

Fig. 4-the 7th uses and proposes caster wheel, the transparent view of four kinds of hand barrows that disposed according to the present invention.These hand barrows are respectively: hand barrow 92 and general hand barrow 93 that hand barrow 90, dull and stereotyped hand barrow 91, the nursery of log transportation used.Every kind of hand barrow all has a platform, or 12, two on underframe is positioned at anterior

conventional castor

21,22, also have two be positioned at the rear portion have a bias voltage orientating function caster wheel 23,24 (24 have been covered) on figure.Point out that in passing the flat-bed upper surface can be impermeable, for example dull and stereotyped hand barrow and general hand barrow have this requirement.Control support 40 from underframe or platform 12 Xiang the Shang Noboru, according to the purposes of hand barrow, it can get different shapes.Handle or to control handgrip 50 can be to be provided by support 40 also can form with support 40 moulding.For example transporting and control handgrip 50 on the hand barrow of hand barrow 90 that log uses and nursery using 92, is to be provided by a part of unit on the support 40, and that part of support will be done to such an extent that have suitable size and dimension, makes it to be hung on to by staff.

Fig. 8 is a kind of transparent view of buggy 310, and it is to have disposed an example with bias voltage orientating function castor proposed by the invention.Though this hand barrow 310 has only a front-wheel 321, it to Fig. 1 on some aspect of hand barrow 10 be similar.Its front-wheel 321 is similar to wheel 21, preferably uses the wheel (for example using conventional caster wheel) of no-bias orientating function.And its two

trailing wheels

323 and 324 are with having bias voltage orientating function caster wheel, and are similar to 24 to wheel on Fig. 1 23.Wheel is the bottom surface that is contained in platform underframe 312.And control support 340 from underframe 312 Xiang the Shang Noboru.Though the support 340 of controlling of picture is matched with the rear end of hand barrow on the figure, it also can be matched with the front end of hand barrow, or be provided with other method.Handle 350 can be with to control support 340 matched.The buggy of shape shown in Figure 8 is usually used in transporting in the airport article such as luggage, yet buggy proposed by the invention can be made other purposes in other occasion.Plate, basket or shelf though graphic hand barrow 310 does not draw if needed, also can be loaded onto one even a plurality of these parts.

Consult Fig. 9 and Figure 10, this is the transparent view according to another kind of hand barrow 410 proposed by the invention, and its trailing wheel can and not have conversion between the state (shown in Figure 10) of bias voltage orientating function at the state with bias voltage orientating function (shown in Figure 9).Hand barrow 410 includes a underframe 412 and four wheels 421-424, and is similar to those of hand barrow 10.Yet, being provided with a linkage unit 430 on this hand barrow, it can make trailing wheel change having bias voltage orientating function state and do not have between the bias voltage orientating function state.This linkage unit 430 includes a power-transfer clutch and triggers spanner 431, and it links with handle 450, and handle 450 is that packaged type ground and connecting rod 432 are matched.Connecting rod 432 is matched with wheel 423,424 one by one, installs in the mode of the rotation of sliding, and connecting rod 432 can be rotated around rotational pin 433.

When power-transfer clutch being triggered spanner 431 and hold, connecting rod 432 just makes the front end of the wheel assembly that

wheel

423 and 424 are housed be pulled upwardly towards the horizontal surface direction, and the wheel with bias voltage orientating function just changes into and do not had bias voltage orientating function caster wheel.Under the state that does not have the bias voltage orientating function, the function of trailing wheel is identical with front-wheel, becomes conventional caster wheel.Because the work of four wheels does not all have the function of bias voltage orientation equally, so the work efficiency of this hand barrow is as European hand barrow.

When power-transfer clutch being triggered spanner 431 releases, connecting rod 432 protracts, and the wheel frame axle of trailing wheel recovers original front rake, has just become to have bias voltage orientating function caster wheel.Rotational pin 433 preferably will be arranged on the front portion of

wheel

423 and 424, and when releasing clutch triggered spanner 431, the weight of hand barrow will make these two wheels transform back into to have the directed caster wheel of bias voltage.

The underframe of hand barrow, support, handle can be made with metal, timber, plastics or other material that is fit to relevant parts.Conventional caster wheel is known by the insider.

Though above by several specific embodiments the present invention has been made description, be construed as the present invention and can also do further change, this patent is intended to contain various variations, purposes or the improvement of carrying out according to principle of the present invention.Also contained with disclosed known arrangement or enforcement convention and departed to some extent, but still be subordinated to the scope of the technology of the present invention and application principle thereof.This patent has also been contained the scope of claims of the present invention.

Claims

1. hand barrow, it is by a underframe, have a front truckle at least, have two rear truckles and one to control handgrip is constituted:

Above-mentioned front truckle is the front portion that is connected underframe;

Above-mentioned rear truckle is the rear portion that is connected underframe, and has the function of bias voltage orientation;

The above-mentioned handgrip of controlling is the rear portion top that is connected underframe, its setting be make hand barrow turn with moving process in, touch for user's hand.

2. hand barrow according to claim 1 is characterized in that, has a rear truckle in the described rear truckle at least, and the bias voltage orientating function that it has is because the wheel carrier rotating shaft of this castor has due to the inclination angle that turns forward.

3. hand barrow according to claim 1 is characterized in that, has a rear truckle in the described rear truckle at least, and the function of the bias voltage orientation that it has is because this castor is provided with due to the biasing spring.

4. hand barrow, it is by a underframe, have a front truckle at least, have two rear truckles and one to control handgrip is constituted:

Above-mentioned rear truckle is the rear portion that is connected underframe, and has the function of bias voltage orientation, and the bias voltage orientating function that it has is because the wheel carrier rotating shaft of this castor has due to the inclination angle that turns forward, or owing to is provided with due to the biasing spring.

5. according to claim 1 or 4 described hand barrows, it is characterized in that having two front truckles at least, and be connected the front portion of underframe.

6. according to claim 1 or 4 described hand barrows, it is characterized in that the described handgrip of controlling is the top, rear portion that is connected underframe, and is connected with one basket in the front portion of controlling handgrip.

7. according to claim 1 or 4 described hand barrows, it is characterized in that continuous, an impermeable upper surface are arranged on the described underframe.

8. according to claim 1 or 4 described hand barrows, it is characterized in that described two rear truckles can and not have between the state of bias voltage orientation them at the state of bias voltage orientation by a mechanism and change.

9. according to claim 1 or 4 described hand barrows, it is characterized in that having four angles on the described underframe at least, a pillar is set on each angle, have four pillars up on the underframe at least, be provided with a plate at least between these four pillars.

10. according to claim 2 or 9 described hand barrows, it is characterized in that the angular region that dips down of described bias voltage direction-caster is 3-40 °, best scope is 5-20 °.