CN2064734U

CN2064734U - Stopper for handcart

Info

Publication number: CN2064734U
Application number: CN 90200062
Authority: CN
Inventors: 全东敏
Original assignee: BEIJING JINGLONG HIGHER SCIENTIFIC TECHNOLOGY Ltd
Current assignee: BEIJING JINGLONG HIGHER SCIENTIFIC TECHNOLOGY Ltd
Priority date: 1990-01-09
Filing date: 1990-01-09
Publication date: 1990-10-31

Abstract

The utility model relates to a stopping device of a four-wheel hand cart. In the device, a mechanism that a joystick is arranged on the outer side of a stay pipe is adopted. The joystick is composed of an upper nodal bar, a lower nodal bar and a regulating nut which is connected with the upper and lower nodal bars and which can adjust the length of the joystick. When the replacement of a stopping contact component is needed, an entire machine is of no need to be decomposed, only with a back wheel removed, the contact component can be conveniently replaced. In the stopping contact component, a n shape can be adopted, the stopping contact component, which is contacted with the two positions of the back wheel, can effectively, powerfully and reliably stop motion. The structure has the advantages of labor saving and time saving, extending the service life of wheels.

Description

Stopper for handcart

The utility model relates to the stop motion mechanism that uses on the common four-wheeled hand truck.

On the simple and easy four-wheeled hand truck that when ground passengers such as machine field boundary move luggage, uses stop motion mechanism is set, makes the hand barrow safe operation.

At present, common employed stop motion mechanism, its structure is roughly as follows:

Insert stop bar in the stay pipe that links with the support component that supports trailing wheel, this stop bar lower end links with an end of extension spring after by the through hole on the support component end face, and the stop contact plate of the other end of extension spring and described support component inboard links; One end of handrail is by the slotted hole of stay pipe, and the upper end with stop bar in stay pipe links, and handrail is approximately vertical with stay pipe.

When hand barrow was in halted state, handrail was not subjected to extraneous pressure, owing to the pulling force stop bar decline of extension spring, made decline of stop contact plate and contact on trailing wheel, made hand barrow out of service, finished stop action, and this moment, one end of handrail made progress.

When living handrail with hand, an end of handrail descends, and the other end that links with stop bar rises, and stop bar is also along with rising, so the stop contact plate breaks away from trailing wheel, makes the hand barrow operation.

In this prior art, because the stop contact plate only contacts with a position of trailing wheel, the resistance that applies is very limited, when under the situation of heavy load, operating in tilted road surface, stopping effect is poor, wheel often occurs and under the situation of being obstructed, continue the operation or the phenomenon of on the road surface, skidding, bring the severe wear of wheel thus, and accident such as overturning also takes place sometimes.

In addition, aging or damaged and need more renew contact plate the time,, therefore must decompose whole device could change when the stop contact plate because stop bar is inserted in the stay pipe, bring thus take a lot of work, take a lot of trouble, time-consuming, problems such as inconvenience.

In addition,,, bring the service life of wheel short thus, problem such as uneconomical so some wearing and tearing of trailing wheel as long as the stop contact plate can not contact trailing wheel, must more renew wheel because the length of stop bar is uncontrollable.

In view of above problem, the utility model has been proposed, it for reach effectively, flexibly, safety, stop reliably, reduce the wearing and tearing of wheel, prolong the service life of wheel, change the stop convenient and economical and practical purpose of part in addition, adopted following structure.

The hand barrow stop motion mechanism that the utility model proposed by the support component (3), the stay pipe (12) that support trailing wheel, be positioned at stay pipe is outer and in parallel, the lower end is provided with stop contact component (5) joystick (6), with joystick link the effect lever (8) that makes its lifting and butterfly support spring (14) formation of handrail (9), connecting piece (11) and supporting role lever.Described stay pipe lower end and support component (3) link, and its upper end links with connecting piece (11); Joystick (6) is by upper and lower two poles with they thread connection, and the setting nut of scalable joystick length formation, and the lower end of following pole (6a) is provided with stop contact component (5), and the upper end of last pole links with the front end of effect lever; Effect the latter half of of lever is inclined upwardly, the middle part corner of effect lever links with the whorl split axle that links parts and butterfly support spring (14), and the rake of effect lever is overlayed on the upper limb (14a) of butterfly support spring, handrail is connected with binding parts axle, handrail is positioned on the effect lever rake and contacts with it, and slightly vertical with joystick.

When live handrail (9) with hand, when applying downward power, descend with handrail owing to act on the sloping portion of lever, the other end of effect lever just rises, the joystick (6) that links with the effect lever also rises, and makes the stop contact component of its lower end break away from trailing wheel, makes the hand barrow operation.

When removing to handrail (9) institute applied pressure, because the elastic force of butterfly support spring (14), one end of handrail (9) rises, overlay effect lever rake on the butterfly support spring upper limb (14a) simultaneously also along with rising, so the other end of effect lever descends, also descend with the joystick of its binding, the stop contact component contact that makes the joystick lower end is on trailing wheel, stop the operation of hand barrow, finish stop action.

Reliably effective for stopping effect, the stop contact component can be made " ∏ " shape, makes two positions of wheel stressed simultaneously, is obstructed.

If accomplishing the length of control lever can regulate, then because the aging or wearing and tearing of wheel, the stop contact component can not contact wheel and when losing locking function, can solve problem with the way of regulating joystick length, not needing decomposer comes more not need to change wheel from new adjustment.Therefore, the mutually opposite screw rod of hand of spiral (6b ') and (6b) is respectively made in the upper end that joystick can make upper and lower two poles, go up the lower end of pole and following pole, there is the setting nut of the negative thread that is complementary with above-mentioned two screw rods to be connected above-mentioned upper and lower pole with a upper and lower part car, according to unscrewing or tightening setting nut (7), it is elongated or shorten to regulate joystick.

The stop contact component can be made of one also with following pole (6a) can take type of attachment.

Fig. 1 is the hand barrow oblique drawing that the stop motion mechanism that the utility model proposes is housed;

Fig. 2 is the section-drawing of the hand barrow stop motion mechanism embodiment that proposes of the utility model;

Fig. 3 is the oblique drawing of the last pole (6a) of joystick (6);

Fig. 4 is the oblique drawing of effect lever;

Fig. 5 is the oblique drawing of butterfly support spring.

Among the figure, the 3-support component; 5-stop contact component; The 6-joystick; The upper and lower pole of 6a, 6a '; The 7-setting nut; 8-effect lever; The 9-handrail; 11-links parts; The 12-stay pipe; 14-butterfly support spring.

Embodiment:

Describe embodiment of the present utility model in detail below in conjunction with drawing.

Fig. 2 is the section-drawing of present embodiment.(2) are trailing wheels among the figure, trailing wheel (2) is connected with removing support part part (3) axle, the prominent garden post (3 ') of establishing on the end face of support component (3), it is inserted in stay pipe (12) lower end, fixing with set pin (10), the stay pipe upper end is inserted and linked in the parts (11), and is fixing with set pin (10a); About centre is provided with through hole (3a) on the end face of support component (3), the lower end is provided with the following pole (6a) of " ∏ " shape stop contact component (5) by above-mentioned through hole (3a), the upper end of following pole (6a) is the screw rod (6b) of a left side or dextrad screw thread, the lower end of last pole (6a ') is the screw rod (6b ') with (6b) opposite sense screw thread, the upper and lower half car of described setting nut (7) has and the screw rod (6b ') of upper and lower pole, the negative thread that (6b) is complementary, and the screw portion of upper and lower pole is threaded with setting nut (7); Last pole (6a ') upper end is provided with " ∏ " shape and links mouthful (6c), is positioned to link side within the parts (11).Latter half of being inclined upwardly of effect lever (8), the front and back end of effect lever (8) are inserted above-mentioned " ∏ " shape and linked in mouthful (6c), and be fixing with set pin (22); Pivot pin (13a) is located in the pin-and-hole (8a) and the axis hole on the binding parts (11) of the center corner that acts on lever, and at the last butterfly support spring (14) of installing of pivot pin (13a), effect lever rake is stacked on the upper limb (14a) of butterfly support spring (14), is supported by butterfly support spring (14).Handrail (9) is connected by pivot pin (13a) axle with binding parts (11), and handrail (9) is positioned on the effect lever rake, is in contact with it, and handrail (9) slightly becomes plumbness with joystick.

Establish a supporting pin (15) at binding parts medial surface, make it to be positioned at the bottom of belleville spring (14) bottom wing (14b), so that support the butterfly support spring; Also establish one at the medial surface that links parts and stop pin (16), make it to be positioned near under the effect lever of joystick one side, so that prevent to act on the excessive decline of lever.

The hand barrow stop motion mechanism that the utility model proposed, owing to adopted as above structure, thus have following effect:

The stop contact component is made " ∏ " shape among the embodiment of the present utility model, this stop contact component contacts with two positions of trailing wheel during stop, and apply resistance, therefore compare with the common structure of only on a position of trailing wheel, exerting pressure that adopts, stop effectively, effectively, reliably, also can accomplish accurately when on the bevelled road surface, carrying out the heavy load carrying, stop reliably can be avoided wheel to rotate under heavy load on the tilted road surface thus or skids and the phenomenon that makes wheel be subjected to severe wear occurs.Can prolong the service life of wheel thus.Also can avoid taking place accidents such as overturning owing to stop is ineffective.

Owing to adopted the structure that to regulate joystick length, promptly use setting nut (7) each car of an end that is threaded upper and lower two poles of mutual opposite sense screw thread to be arranged and constitute joystick, therefore, because the wearing and tearing of wheel, the stop contact component can't reach wheel and effectively during stop, can be with the way of unscrewing setting nut, the length adjustment of joystick to Len req, continue to use old wheel, do not need to decompose any parts in addition or change wheel, this structure economics practicality, simple, convenient, save time.

In a word, the utlity model has effective, strong, reliable, the safe advantage of stop, accomplished thus prolongation wheel service life, change that easily worn part is easy to operate, easy to maintenance, human-saving, save time, economical and practical.

Claims

1, comprises the stop contact component (5) of support component (3), stay pipe (12), joystick (6) and its lower end of supporting trailing wheel and the hand barrow stop motion mechanism of handrail (9) by this supporting units support, it is characterized in that joystick (6) is positioned at outside the stay pipe (12), and in parallel, the upper end of stay pipe (12) is fixed on and links in the parts (11); Described joystick (6) connects by upper and lower two poles (6a ', 6a) with their screws and the setting nut (7) of scalable joystick length is formed, the described upper end of pole (6a) down is the screw rod (6b) of a left side or dextrad screw thread, the lower end of last pole (6a ') is and (6b) rightabout screw rod (6b ') that the upper and lower half car of described setting nut (7) has and the screw rod (6b ') of upper and lower pole, the negative thread that (6b) is complementary; The lower end of following pole (6a) is provided with stop contact component (5), and following pole (6a) is by through hole and setting nut (7) thread connection on the support component end face; The upper end communication port (6c) of last pole (6a ') connects with the top axle of effect lever (8), pivot pin (13a) is located in the pin-and-hole and the axis hole on the described binding parts (11) of middle part corner of this effect lever, go up the installation butterfly at described pivot pin (13a) and support (14), effect lever rake is placed on the upper limb (14a) of this butterfly support spring (14), handrail (9) connects with binding parts (11) axle, handrail is positioned on the rake of effect lever, is in contact with it; Establish a supporting pin (15) at connecting part (11) medial surface and support butterfly support spring (14); Descend in order to prevent that joystick (8) is undue, establish one in connecting part (11) inboard and stop pin (16).

According to the described stop motion mechanism of claim 1, it is characterized in that 2, described stop contact component (5) is " ∏ " shape.

3,, it is characterized in that the described stop contact component (5) and the following pole (6a) of described joystick are one according to claim 1,2 described stop motion mechanisms.

4,, it is characterized in that the following pole (6a) of described stop contact component (5) and described joystick (6) is connected according to claim 1,2 described stop motion mechanisms.