CN2774882Y

CN2774882Y - Composite stair climbing multipurpose push cart for child

Info

Publication number: CN2774882Y
Application number: CN 200520113736
Authority: CN
Inventors: 王庆文; 吴新宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-17
Filing date: 2005-07-15
Publication date: 2006-04-26
Anticipated expiration: 2015-07-15

Abstract

The utility model relates to a composite stairs-climbing multipurpose push cart for children, which is a carrying tool used for flat ground and going upstairs and downstairs. The composite stair climbing multipurpose push cart for children uses an ordinary planet wheel portable stairs-climbing carrying cart as the foundation and is formed in the way that a folding front carriage, a folding back carriage, a pedal and a safe lock sheet are arranged on the utility model, a cart roof and a back support bracket which can be folded onwards, has a steering function and a stairs-climbing assisting function are combined. The utility model is mainly characterized in that a composite stairs-climbing technique that a planetary wheel and a steering wheel which is arranged at the lower end of the support bracket and is tucked up by a certain height are combined for climbing the stairs. The structure is simple and is convenient for folding the whole cart, and the weight and the cost of the utility model are similar to the weight and the cost of an ordinary cart for children. The composite stairs-climbing multipurpose push cart for children can also the children to ascend and descend the stairs conveniently and steadily, and the labor is saved except that the functions of the ordinary cart for children are provided. The composite stairs-climbing multipurpose push cart for children is converted into a box stairs-climbing shopping cart or a planet wheel portable stairs-climbing carrying cart in turn according to needs of users in the way that corresponding components are taken off, and the purpose that a cart has multiple functions is achieved.

Description

Combined type is stepped on the building and is used children trolley more

Technical field

The utility model relates to a kind of home-use means of delivery, and particularly a kind of combined type is stepped on the building and used children trolley more.

Technical background

Existing children trolley pattern is a lot, but owing to do not step on the building function, makes the abovestairs user that lives feel inconvenience deeply.Its purposes of this external cause is single, can only use when children are immature, has just lost value of service after the child grows, thereby has caused the waste of family's property.Number of patent application is 01267567.9 utility model, designed a kind of many with stepping on the building children trolley, it had both had the function of common children trolley, can carry children again goes up downstairs, can also become successively that van-type is stepped on the building shopping cart and planet gear type is stepped on the building carrier loader by laying down corresponding component, but because of can producing certain vibrations downstairs the time on it, and structural former thereby can't to carry out car load folding, be not easy to collection, thereby be unfavorable for applying.

Summary of the invention

The purpose of this utility model provides a kind of multinomial functions of stepping on the building children trolley of using that promptly have more, can haul children again convenient, steadily, effortlessly and go up downstairs, the combined type folding and conversion of go-cart kind that can also finish car load is easily stepped on the building and is used children trolley more.

The purpose of this utility model is to realize like this.

Combined type is stepped on the many portable building carrier loaders of being made up of a pair of satellite gear (1), pedestal (27), carriage (25), front frame and the handlebar that can stretch of stepping on of common planet gear type that comprise with children trolley in building; The folding front compartment of forming by compartment underframe (15), upper frame (14), preceding link rod (17), connector (16) and (21); The adjustable trunk of forming by backrest (6), rear frame (8), back link rod (9), connector (7) of backrest angle; The after poppet of forming by carrier base (37), short sleeve (38), bearing pin (39), annular pin (40), locking bolt orienting sleeve (35), locking bolt (34), extension spring (43), top rod (36), lower link (32), lock tube (33), pole (31), rivet (41), wheel carrier (44), wheel flutter assembly (4), slip brake (29) and brake lever (30); The hood of forming by main supporting rod (13), front strut, hood support and cloth paulin; And two safe locking plates (2), pedal (22), pedal support (23), pallet (18) and trim packing cover etc.This car is based on the portable building carrier loader of stepping on of common planet gear type, the upper end of the connector of folding front compartment (16) is articulated in the preceding bottom of upper frame two side girders respectively, the lower end of two connections (16) is hinged with the upper end of two preceding link rods (17) respectively, the lower end of link rod is articulated in respectively on two connectors (21) that are installed in the compartment underframe two side girder front ends outside before two, and the rear end of upper frame two side girders is articulated in respectively on a pair of the picking up the ears of two connectors (10) front portion that is installed in handlebar two outer tubes (11) middle and upper part; The upper end of the rear frame of trunk is hinged with the rear end of back link rod, the lower end of rear frame is articulated on the connector (7) that is installed in the backrest rear end, the anterior straight hook of back link rod (9) inserts in the hole at connector (10) rear quarter panel middle part, insert in the knock hole that exposes the straight chimoto hole outside with ring type or safety pin formula locating dowel pin back link rod front end is locked, the front end of backrest two vertical poles is articulated on the hinged screw rod that is installed on the handlebar two outer tube bottom connectors (3); The angle of backrest is set up by the accommodation zone (5) and the snap close that are fixed on the connector (10).The entablatrance of the front cross rail of compartment underframe and carriage (25) links in mode that can folding, the entablatrance of carriage limits displacement before and after it by two locating parts (24) that are installed in front side, railway carriage underframe front cross rail both ends respectively with respect to the locking piece (19) that locating part is articulated in the front cross rail rear side, by being installed in carriage entablatrance two ends and being positioned at the cross travel of two of two the locating part inboards spacing cushion blockings of open circles axle sleeve shape (20) the restriction carriages of being made by highly elastic material with respect to the compartment underframe; The entablatrance of pedestal is mounted respectively in two connectors (26) cover at underframe after cross member two ends, compartment and is associated in together, the compartment underframe can serve as that axle rotates with the entablatrance of pedestal, limits the cross travel of pedestal with respect to the compartment underframe by being installed in pedestal entablatrance two ends and being positioned at two inboard spacing cushion blockings of being made by highly elastic material of two connectors (26); Can keep off at the rear portion of satellite gear supporting plate upper end articulated respectively one of the rear side of pedestal two side girder middle and lower parts, prevent the safe locking plate (2) that the compartment overturns forward with respect to satellite gear; A pair of pole can be turned up having of certain altitude to the front upper place and be turned to, brakes and assist the after poppet of stepping on the building function to be installed in the back lower place of the vertical tail boom in both sides, railway carriage underframe rear portion respectively by pair of brackets seat (37), pole is installed on carrier base turns up height limiting device, the nadir that is installed on the wheel flutter of pole lower end when pole is turned up is controlled on the ad-hoc location that is lower than the stairway step height, by the rotation of the brake gear limiting wheel that is installed in wheel carrier (44) rear flank portion.Insert in the side opening of a pair of connector (10) front upper place to the part ecto-entad of inboard horizontal curvature the main supporting rod of hood (13) lower end, both sides, is locked by the ring-type backing pin that inserts in its end hole, and hood can be with main supporting rod overturning forward when folding.Telescopic handlebar is by push rod (12), a pair of outer tube (11), two orienting sleeves (48), two slide blocks (52), two setscrew nuts (47), two end caps (49), two pilot pins (45), two compression springs (46), two bolt covers (51) and two glands (50) are formed, push rod lower end in two overcoat pores is installed with the slide block that the surface has the rib that leads respectively, an orienting sleeve that play the guiding role for push rod respectively is installed in the hole of two outer sleeve uppers, on the two side of outer tube and orienting sleeve, have the side opening of coaxial line, one end all is installed in side opening has setscrew nut greater than the special-shaped anti-rotation pillow block of nut body, end cap is pressed on the outer face of orienting sleeve, and be enclosed within the outer tube end, chute on the end cap madial wall is stuck in the limit portion of the special-shaped anti-rotation pillow block that is exposed to the outer setscrew nut of side opening simultaneously, by spring washer and screw end cap and setscrew nut is tightened together; Below the outside of outer tube, orienting sleeve, welding a bolt cover that is equipped with gland perpendicular to outer tube, in the bolt cover pilot pin that is overlapping compression spring is installed, on two outer tubes that are positioned at the bolt cover, be drilled with respectively and the corresponding hole of pilot pin, in the outside of the both sides of push rod vertical pole, according to pulling out and when regaining push rod and the corresponding position of pilot pin is drilled with two knock holees respectively; All welding three locationss that are used to install connector (3) and (10) in the back of two outer tubes.

Return two safe locking plates, the pole of turning up after poppet promptly can also can haul children this moment upward downstairs with this car when children's larry uses.This car can also be by laying down hood, pallet, pedal, pedal support, trunk and trim packing cover, sets up shopping pocket for front compartment again and promptly can be changed into and step on the building shopping cart; If lay down front compartment and after poppet again, install front frame and jump ring in bracket front part, this car can be become the portable building carrier loader of stepping on of common planet gear type.

How combined type is stepped on the building is to realize like this with the folding of children trolley; Open locking piece (19), carriage closed up to pedestal, this moment front compartment along with the compartment underframe with the entablatrance of pedestal serve as axially pedestal close up finish folding; Backrest is closed up and to finish trunk folding to handlebar; Hood is rolled over down forward, be retracted to handlebar the shortest; At last after poppet is turned up forward and promptly finished the folding of car load.

Combined type is stepped on the building and how can be hauled children more steadily, effortlessly with children trolley to go up key downstairs be to have adopted to unite the combined type of stepping on the building by satellite gear and wheel flutter and step on the building technology.This combined type is stepped on the building technology and is exactly when stepping on the building, and the after poppet of turning up to the front upper place is limited to the nadir of wheel flutter on the certain height that is lower than the stairway step height, unites and steps on the building by being limited in wheel flutter on the certain height and satellite gear.Wheel flutter at first rolls on first step in the time of upstairs, along with wheel flutter rolls forward on first step, satellite gear also and then rolls and goes up first step, and go up first step along with satellite gear rolls, the position of wheel flutter is elevated again, wheel flutter rolls on second step more then, has realized promptly that and so forth combined type steps on building motion; Order in the time of downstairs is opposite with upstairs the time.

Combined type step on the building how with children trolley except the function that has present children trolley and have, its major advantage is that its can haul children more convenient, steady, laborsaving, safely and goes up downstairs, thereby has made things convenient for user's life in the building widely; This car can also become successively that van-type is stepped on the building shopping cart or common planet gear type is portable steps on the building carrier loader by laying down corresponding component, thereby has realized the many usefulness of a car, has higher value of service than common children trolley.This car also has the advantage that folding convenient, the volume after folding are little, be convenient to collect in addition.Although this car function is many, purposes is wide, its weight and cost and common children trolley are similar.

Description of drawings

Fig. 1 is that combined type is stepped on the building and how always to be schemed with the children trolley structure

Fig. 2 is the after poppet constructional drawing

Fig. 3 is handle bar structure figure

Specific embodiments

Below in conjunction with embodiment of the present utility model and accompanying drawing, combined type is stepped on the building how to be described in detail with children trolley.

In this embodiment, the portable building carrier loader of stepping on of planet gear type is made up of a pair of three wheeled satellite gears (1), pedestal (27), carriage (25), handlebar and front frame and jump ring etc.Telescopic handlebar is by push rod (12), two outer tubes (11), two orienting sleeves (48), two slide blocks (52), two setscrew nuts (47), two end caps (49), two pilot pins (45), two compression springs (46), two bolt covers (51) and two glands (50) are formed, push rod lower end in two overcoat pores is installed with the slide block that the surface has the rib that leads respectively, an orienting sleeve that play the guiding role for push rod respectively is installed in the hole of two outer sleeve uppers, on the two side of outer tube and orienting sleeve, have the side opening of coaxial line, one end all is installed in side opening has setscrew nut greater than the special-shaped anti-rotation pillow block of nut body, end cap is pressed on the outer face of orienting sleeve, and be enclosed within the outer tube end, chute on the end cap madial wall is stuck in the limit portion of the special-shaped anti-rotation pillow block that is exposed to the outer setscrew nut of side opening simultaneously, by spring washer and screw end cap and setscrew nut are tightened together, the outside at outer tube, a bolt cover that is equipped with gland is being welded perpendicular to outer tube in the below of orienting sleeve, in the bolt cover pilot pin that is overlapping compression spring is installed, the front end of pilot pin is one and has the about 6 millimeters short cylinder of sphere termination diameter, the back of short cylinder is through the about 9 millimeters coaxial round platforms that are about 2 millimeters outside one, the back of round platform is through about 6 millimeters guidepost outside one section, the back of guidepost is the about 4 millimeters annular groove of a bit of external diameter, the back of annular groove is that one section outer face of cylinder through about 6 millimeters and both sides is processed to the oblate cylinder at a distance of about 4 millimeters symmetrical plane, the gland that is made of plastics (50) is gone up in-plane has one to slide up and down therein with the more bigger through hole confession pilot pin of the oblate cylinder shape of cross section same size of pilot pin, four sagging locking plates in the lower end of gland along the equal portion of bolt cover outside face, on each locking plate, all have one inwards the little spherical surface body of projection embed in four cooresponding with it apertures of bolt cover upper surface.Be drilled with respectively and the corresponding hole of pilot pin being positioned on two outer tubes of bolt cover, in the outside of the both sides of push rod vertical pole, according to pulling out and when regaining push rod and the corresponding position of pilot pin is drilled with two knock holees respectively; All welding three location short sleeves that are used to install connector (3) and (10) in the back of two outer tubes.The lower end of handlebar two outer tubes is articulated in respectively on two connectors (28) that are installed in pedestal two curb girders upper end, handlebar can be that axial pedestal is folding with hinge bolt, under non-folding mode of operation by removable stop pin through the through hole on connector (28) top and the knock hole of outer tube, thereby handlebar can't be rotated with respect to pedestal.Two satellite gears are installed in the axle shank plate both sides that are welded in pedestal longeron posterior end by axletree.Carriage is articulated on the support that is installed in the pedestal lower end, and the available locking piece that is installed in the support bottom is locked on support.Articulated pedal support on the longeron of carriage both sides (as children trolley time) or front frame (when stepping on the building carrier loader) as planet gear type is portable.Two spacing cushion blockings of being made by high-elastic rubber are installed respectively at the entablatrance two ends of carriage and pedestal.

The compartment underframe of folding front compartment is welded at grade by two longerons, two crossbeams and two tail booms being positioned at the rear portion; Two upper ends by the preceding link rod that steel pipe is made are hinged with the connector (16) that is hinged on the preceding bottom of upper frame two side girders respectively, the lower end is articulated on the connector (21) that is installed in the compartment underframe two side girder front ends outside, and the rear end of upper frame is articulated on the connector (10) that is installed in the handlebar middle part.Two U-shaped connectors (26) that are used to overlapping the pedestal entablatrance are installed on compartment underframe after cross member, two pairs of L shaped locating part (24) and locking pieces (19) that are used for the locking tray entablatrance are installed on compartment underframe front cross rail.At the upper frame front end pallet (18) is installed, can suspends the glove basket in midair in the bottom of compartment underframe.The adjustment mode of its structure of folding trunk, method for making and backrest angle is identical with common children trolley, the front end of different is backrest two vertical poles is articulated on the hinged screw rod on the connector (3) that is installed in the handlebar lower end, the anterior straight hook of back link rod (9) inserts in the hole at connector (10) rear quarter panel middle part, and inserting with ring type or safety pin formula locating dowel pin will back link rod front end locking in the knock hole that exposes straight chimoto outside the hole.

The similar trim packing cover of structure and method for making and common children trolley is installed in the compartment, front and back.

By carrier base (37), short sleeve (38), bearing pin (39), annular pin (40), locking bolt orienting sleeve (35), locking bolt (34), extension spring (43), top rod (36), lower link (32), lock tube (33), pole (31), rivet (41), wheel carrier (44), wheel flutter assembly (4), the after poppet that slip brake (29) and brake lever (30) are formed, carrier base is a U-shaped part, there is a top rod that exposes the vertical side plate of carrier base upper end at the horizontal backboard at its rear portion, locking bolt orienting sleeve with longitudinally guiding chute and located lateral groove is arranged in the bottom of backboard, in locking bolt orienting sleeve, the locking bolt is installed, postmedian at the locking bolt is installed with the bolt handle, the inclined-plane of stud shaft line into about miter angle made and locked in the preceding lower end of locking bolt, the inclined-plane faces the horizontal backboard at carrier base rear portion, there is a pair of through hole vertical with side plate front lower place at carrier base two vertical side plates, this be installed with on to through hole be with short sleeve be used for limiting the bearing pin that pole is turned up height, short sleeve is between biside plate, the end of exposing side plate at bearing pin is locked by packing ring and annular pin, rear lower at carrier base two vertical side plates has a pair of through hole perpendicular to side plate, hinged by the top through hole of rivet and pole on through hole, the pole top of being made by steel pipe is to front curve, welding a lock tube of making by steel pipe in its upper back, the axis of lock tube and the dead in line that locks the bolt orienting sleeve, less clearance is left with the lower surface of locking bolt orienting sleeve in the upper surface of lock tube, welding one turns up after the brace panel between pole and short sleeve when pole in the front side of pole upper end, towards the go-cart inboard lower link is installed in the pole middle and upper part, the upper and lower side of an extension spring colludes respectively and is hung on top rod and the lower link, the axis of extension spring was positioned at the left side of rivet (41) when pole was turned up, and the axis of extension spring was positioned at the right side of rivet (41) when pole fell; The wheel flutter assembly that has brake gear is installed in the pole lower end, brake gear is made up of an a pair of slip brake (29) and a brake lever (30), a pair of slip brake is sleeved on the outside of the wheel shaft damping slotted hole flange of existing wheel carrier (44) both sides respectively with a slotted hole, the length of slip brake slotted hole is about 20 millimeters than the length of the slotted hole flange of wheel carrier, there is one to lean out and can when gliding, insert the special-shaped hanging pillar that is positioned at the inboard brake tooth of wheel gap in the top portion of slip brake slotted hole perpendicular to the slotted hole outer face, all have an otic placode that plays anastomosis at the rear portion of a pair of slip brake, the brake lever that is positioned at the wheel carrier rear portion tightens together by the otic placode of rivet and its both sides, there is a locating plate that has little positioning boss the upper end before brake lever, and the positioning boss that stretches to wheel carrier is stuck in the position that on the inclined-plane of going up the angle behind the wheel carrier brake is remained on to lift.

The structure of hood is similar to common children trolley, insert in the side opening of a pair of connector (10) front upper place to the part ecto-entad of inboard horizontal curvature main supporting rod (13) lower end, both sides of different is hood, be locked by the ring-type backing pin that inserts in its end hole, connector (10) front upper place is used to assign the horizontal side opening of main supporting rod (13) to be positioned on the end face of inboard, compartment has a diameter outer through big 5 millimeter than main supporting rod, the circular counter bore of dark 9 millimeter, inner cylinder face with counterbore on the outer face of circular counter bore serves as that the basis outwards has two rectangle technique counterbores that are symmetrical in the center of circle, on the top outer face of connector front upper place side opening, there are two to lay respectively at before and after the main supporting rod, and being higher than the main supporting rod positive stop lug boss restriction main supporting rod swing of side opening outer face 5 millimeter, hood can be with main supporting rod overturning forward when folding.

Safe locking plate (2) is made by steel plate, is installed in the rear lower of pedestal by special shaped screw bolt and high resiliency packing ring.

Claims

1. a combined type is stepped on the building and is used children trolley more, comprise by a pair of satellite gear (1), pedestal (27), carriage (25), the portable building carrier loader of stepping on of common planet gear type that front frame and telescopic handlebar are formed, by main supporting rod (13), front strut, the hood that hood support and cloth paulin are formed, by backrest (6), the trunk that rear frame (8) and back connector (9) are formed, and front compartment, a pair of after poppet, two safe locking plates (2), pedal (22), pedal support (23) and pallet (18), it is characterized in that by compartment underframe (15), upper frame (14), two preceding link rods (17) and two pairs of connectors (16), (21) formed the folding front compartment, wherein the upper end of two connectors (16) is articulated in the preceding bottom of upper frame two side girders respectively, the lower end of two connections (16) is hinged with the upper end of two preceding link rods (17) respectively, the lower end of link rod is articulated in respectively on two connectors (21) that are installed in the compartment underframe two side girder front ends outside before two, and the rear end of upper frame two side girders is articulated in respectively on a pair of the picking up the ears of two connectors (10) front portion that is installed in handlebar two outer tubes (11) middle and upper part; The anterior straight hook of a pair of back link rod (9) of trunk inserts in the hole at connector (10) rear quarter panel middle part, insert in the knock hole that exposes the straight chimoto hole outside with ring type or safety pin formula locating dowel pin back link rod front end is locked, the front end of backrest two vertical poles is articulated on the hinged screw rod that is installed on the handlebar two outer tube bottom connectors (3); The entablatrance of the front cross rail of compartment underframe and carriage (25) links in mode that can folding, the entablatrance of carriage limits displacement before and after it by two locating parts (24) that are installed in front side, railway carriage underframe front cross rail both ends respectively with respect to the locking piece (19) that locating part is articulated in the front cross rail rear side, by being installed in carriage entablatrance two ends and being positioned at the cross travel of two of two the locating part inboards spacing cushion blockings of open circles axle sleeve shape (20) the restriction carriages of being made by highly elastic material with respect to the compartment underframe; The entablatrance of pedestal is mounted respectively in two connectors (26) cover at underframe after cross member two ends, compartment and is associated in together, the compartment underframe can serve as that axle rotates with the entablatrance of pedestal, limits the cross travel of pedestal with respect to the compartment underframe by being installed in pedestal entablatrance two ends and being positioned at two inboard spacing cushion blockings of being made by highly elastic material of two connectors (26); Can keep off at the rear portion of satellite gear supporting plate upper end articulated respectively one of the rear side of pedestal two side girder middle and lower parts, prevent the safe locking plate (2) that the compartment overturns forward with respect to satellite gear; A pair of pole can be turned up having of certain altitude to the front upper place and be turned to, brakes and assist the after poppet of stepping on the building function to be installed in the back lower place of the vertical tail boom in both sides, railway carriage underframe rear portion respectively by pair of brackets seat (37), pole is installed on carrier base turns up height limiting device, the nadir that is installed on the wheel flutter of pole lower end when pole is turned up is controlled on the ad-hoc location that is lower than the stairway step height, by the rotation of the brake gear limiting wheel that is installed in wheel carrier (44) rear flank portion; Insert in the side opening of a pair of connector (10) front upper place to the part ecto-entad of inboard horizontal curvature the main supporting rod of hood (13) lower end, both sides, is locked by the ring-type backing pin that inserts in its end hole; Telescopic handlebar is by push rod (12), a pair of outer tube (11), two orienting sleeves (48), two slide blocks (52), two setscrew nuts (47), two end caps (49), two pilot pins (45), two compression springs (46), two bolt covers (51) and two glands (50) are formed, push rod lower end in two overcoat pores is installed with the slide block that the surface has the rib that leads respectively, an orienting sleeve that play the guiding role for push rod respectively is installed in the hole of two outer sleeve uppers, on the two side of outer tube and orienting sleeve, have the side opening of coaxial line, one end all is installed in side opening has setscrew nut greater than the special-shaped anti-rotation pillow block of nut body, end cap is pressed on the outer face of orienting sleeve, and be enclosed within the outer tube end, chute on the end cap madial wall is stuck in the limit portion of the special-shaped anti-rotation pillow block that is exposed to the outer setscrew nut of side opening simultaneously, by spring washer and screw end cap and setscrew nut are tightened together, the outside at outer tube, a bolt cover that is equipped with gland is being welded perpendicular to outer tube in the below of orienting sleeve, in the bolt cover pilot pin that is overlapping compression spring is installed, on two outer tubes that are positioned at the bolt cover, be drilled with respectively and the corresponding hole of pilot pin, in the outside of the both sides of push rod vertical pole, according to pulling out and when regaining push rod and the corresponding position of pilot pin is drilled with two knock holees respectively; All welding three locationss that are used to install connector (3) and (10) in the back of two outer tubes.

2. step on the building according to the described combined type of claim 1 and use children trolley more, it is characterized in that by carrier base (37), short sleeve (38), bearing pin (39), annular pin (40), locking bolt orienting sleeve (35), locking bolt (34), extension spring (43), top rod (36), lower link (32), lock tube (33), pole (31), rivet (41), wheel carrier (44), wheel flutter assembly (4), the after poppet that slip brake (29) and brake lever (30) are formed, carrier base is a U-shaped part, there is a top rod that exposes the vertical side plate of carrier base upper end at the horizontal backboard at its rear portion, locking bolt orienting sleeve with longitudinally guiding chute and located lateral groove is arranged in the bottom of backboard, in locking bolt orienting sleeve, the locking bolt is installed, postmedian at the locking bolt is installed with the bolt handle, the inclined-plane of stud shaft line into about miter angle made and locked in the preceding lower end of locking bolt, the inclined-plane faces the horizontal backboard at carrier base rear portion, there is a pair of through hole vertical with side plate front lower place at carrier base two vertical side plates, this be installed with on to through hole be with short sleeve be used for limiting the bearing pin that pole is turned up height, short sleeve is between biside plate, the end of exposing side plate at bearing pin is locked by packing ring and annular pin, rear lower at carrier base two vertical side plates has a pair of through hole perpendicular to side plate, hinged by the top through hole of rivet and pole on through hole, the pole top of being made by steel pipe is to front curve, welding a lock tube of making by steel pipe in its upper back, the axis of lock tube and the dead in line that locks the bolt orienting sleeve, less clearance is left with the lower surface of locking bolt orienting sleeve in the upper surface of lock tube, welding one turns up after the brace panel between pole and short sleeve when pole in the front side of pole upper end, towards the go-cart inboard lower link is installed in the pole middle and upper part, the upper and lower side of an extension spring colludes respectively and is hung on top rod and the lower link, the axis of extension spring was positioned at the left side of rivet (41) when pole was turned up, and the axis of extension spring was positioned at the right side of rivet (41) when pole fell; The wheel flutter that has brake gear is installed in the pole lower end, brake gear is made up of an a pair of slip brake (29) and a brake lever (30), a pair of slip brake is sleeved on the outside of the wheel shaft damping slotted hole flange of existing wheel carrier (44) both sides respectively with a slotted hole, the length of slip brake slotted hole is about 20 millimeters than the length of the slotted hole flange of wheel carrier, there is one to lean out and can when gliding, insert the special-shaped hanging pillar that is positioned at the inboard brake tooth of wheel gap in the top portion of slip brake slotted hole perpendicular to the slotted hole outer face, all have an otic placode that plays anastomosis at the rear portion of a pair of slip brake, the brake lever that is positioned at the wheel carrier rear portion tightens together by the otic placode of rivet and its both sides, there is a locating plate that has little positioning boss the upper end before brake lever, and the positioning boss that stretches to wheel carrier is stuck in the position that on the inclined-plane of going up the angle behind the wheel carrier brake is remained on to lift.

3. step on the building according to the described combined type of claim 1 and use children trolley more, the front end that it is characterized in that pilot pin (45) is one and has the about 6 millimeters short cylinder of sphere termination diameter, the back of short cylinder is through the about 9 millimeters coaxial round platforms that are about 2 millimeters outside one, the back of round platform is through about 6 millimeters guidepost outside one section, the back of guidepost is the about 4 millimeters annular groove of a bit of external diameter, the back of annular groove is that one section outer face of cylinder through about 6 millimeters and both sides is processed to the oblate cylinder at a distance of about 4 millimeters symmetrical plane, plastics gland (50) is gone up in-plane has one to slide up and down therein with the more bigger through hole confession pilot pin of the oblate cylinder shape of cross section same size of pilot pin, four sagging locking plates in the lower end of gland along the equal portion of bolt cover outside face, on each locking plate, all have one inwards the little spherical surface body of projection embed in four cooresponding with it apertures of bolt cover upper surface.

4. step on the building according to the described combined type of claim 1 and use children trolley more, it is characterized in that connector (10) front upper place is used to assign the horizontal side opening of main supporting rod (13) to be positioned on the end face of inboard, compartment and has a diameter outer through big 5 millimeter than main supporting rod, the circular counter bore of dark 9 millimeter, inner cylinder face with counterbore on the outer face of circular counter bore serves as that the basis outwards has two rectangle technique counterbores that are symmetrical in the center of circle, on the top outer face of connector front upper place side opening, there are two to lay respectively at before and after the main supporting rod, and be higher than the main supporting rod positive stop lug boss of side opening outer face 5 millimeter; The middle and lower part of connector is a H shape, its front end both sides respectively have one protrude and respectively have a horizontal through hole forward be used to connect picking up the ears of upper frame (14), also respectively there is a rear quarter panel that is used to connect outer tube (11) its both sides, rear portion, and the two pairs of through holes that are positioned at two rear quarter panel top and the bottom equate with the horizontal gusset distance that is connecting biside plate and be parallel to the outer tube axis.

5. step on the building according to the described combined type of claim 1 and use children trolley more, it is characterized in that locating part (24) is a narrow L shaped part, have the through hole that usefulness is installed on the top on its long limit.

6. step on the building according to the described combined type of claim 1 and use children trolley more, it is characterized in that connector (26) is a narrow U-shaped part, has the through hole of a pair of installation usefulness on the biside plate top of its open end.