A kind of folding joint
Technical field
The utility model relates to a kind of folding joint that is mainly used in folding bicycle, electric motor bicycle with folding, particularly a kind of folding joint that is applied on folding stand, the folding vertical tube.
Background technology
Bicycle is because of body-building, environmental protection, liked by the customer in China, in recent years, folding bicycle is little because of taking up an area of the space, easy to carryly pursued deeply, folder is the folding bicycle important components, the safety of folder, operation convenience, Costco Wholesale, be subjected to folding bicycle fan's concern service life etc., Chinese patent literature 200820212238.0 discloses a kind of bicycle folder, it is by handle, folder leading edge and folder trailing edge constitute, handle links to each other with the folder leading edge by arm pivot post, the folder leading edge is connected by bearing pin with trailing edge and is welded on the bicycle respectively, the curved surface of the binding face of folder two edge for fitting, handle is provided with a push rod, and push rod one end runs through the crosswise fixed pin and is threaded, and the other end passes the handle through hole and withstands drum shaft; Because push rod will pass two holes simultaneously and one of them is to be threaded, relate to the problem of right alignment, if the handle through hole too pine cause push rod rock, not firm, if handle through hole tension then cause assembling difficulty, and the required part of this programme is many, shows complicated slightly.
The utility model content
The utility model aims to provide a kind of simple in structure, easy to process, easy folding joint of assembling.
Another purpose of the present utility model provides a kind of inexpensive, easy to use, failure-free folding joint.
The utility model is achieved in that a kind of folding joint, comprise first folded formation, second folded formation and handle, first folded formation and second folded formation are hinged in a side, the opposite side of the handle and first folded formation is rotatably connected, end near first folded formation on the described handle is provided with contiguous block, be fixed with push rod on the contiguous block, an end of described push rod withstands on the acrosome of second folded formation folding joint is locked.
Described contiguous block is provided with tapped bore, and described push rod is provided with the outside thread that cooperates with described tapped bore.
The acrosome of described second folded formation is located on second folded formation, and acrosome is a circular arc along the cross section of push rod rotation direction.
The acrosome of described second folded formation is a drum shaft, and during folding joint locking, described push rod withstands on the described drum shaft.
The acrosome of described second folded formation is drum shaft and the axle sleeve that is set on the drum shaft, and during folding joint locking, described push rod withstands on the described axle sleeve.
The cross-sectional plane of described axle sleeve is annulus, eccentric annulus, elliptical ring or is provided with the fan-shaped of circular hole.
Described axle sleeve is provided with boss than the heavy wall side.
Be respectively equipped with corresponding projection and groove on first folded formation and second folded formation.
The line of centers of described handle front end line of centers and tail end has certain included angle.
Described folding joint also comprises the handle position limiting structure.
A kind of folding joint that the utility model provides, simple in structure, easy to process, the assembling easy, cheap, easy to use, reliable.
Description of drawings
Fig. 1 is the exploded view of the utility model embodiment one folding joint;
Fig. 2 is the cutaway view of the utility model embodiment one folding joint;
Fig. 3 be the utility model embodiment eighty percent discount splice the head exploded view;
Fig. 4 is the exploded view of the utility model embodiment three folding joints;
The exploded view of the utility model embodiment three folding joint improvement projects during Fig. 5;
Fig. 6 is the scheme drawing of the utility model embodiment four folding joints.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Embodiment one, as shown in Figure 1 and Figure 2, a kind of folding joint, comprise that first folded formation 1, second folded formation 2 and handle 3, the first folded formations 1 and second folded formation 2 are hinged in a side by hinge 7, first folded formation 1 is hinged by hinge 6 at opposite side and handle 3, end near first folded formation on the described handle 3 is provided with contiguous block 5, contiguous block 5 is provided with tapped bore, and push rod 4 is provided with outside thread, and push rod 4 is threaded with contiguous block 5.
First folded formation 1 and second folded formation 2 are fitted, turning handle 3, gradually near second folded formation 2, push rod 4 bottoms slip over the dome shape structure 11 on second folded formation 2, when push rod 4 and second folded formation, 2 interference fit, and when the sphere of the dome shape structure 11 of second folded formation 2 and push rod 4 are vertical, promptly turn over the dead point, then first folded formation 1 and second folded formation 2 are locked reliably.Push rod 4 stress points have shortened the stressed distance of push rod 4 greatly in the threaded connection place of bottom and push rod 4 and contiguous block 5, have strengthened the rigidity of push rod 4, and folding joint is more reliable, regulates the position of 5 of push rod 4 and contiguous blocks, the coupling mechanism force of adjustable folding joint.The acrosome of described dome shape structure 11 can be made as other structure, and as cylindrical surface structure, only need satisfy acrosome is circular arc along the cross section of push rod 4 rotation directions.
Embodiment two, as shown in Figure 3, different being of present embodiment folding joint and embodiment one folding joint, be provided with engaging lug 9 in second folded formation, 2 relevant positions, engaging lug 9 can ccontaining drum shaft 8, when turning handle 3, drum shaft 8 is withstood and the locking folding joint in push rod 4 bottoms, first folded formation 1 is provided with projection 12, the second folded formations and is provided with groove correspondence with it, and folding joint positions by projection 12 and groove structure.As the equivalent technical solutions of present embodiment, second folded formation, 2 relevant positions are provided with the axis hole of ccontaining drum shaft 8, place drum shaft 8 middle parts of axis hole to have part to expose, turning handle 3, and drum shaft 8 is withstood and the locking folding joint in push rod 4 bottoms.
Embodiment three, and as shown in Figure 4, splice different being of head of present embodiment folding joint and embodiment eighty percent discount is arranged with the axle sleeve 10 of column on the drum shaft 8, and described axle sleeve 10 cross-sectional planes are annulus.As the preferred version of present embodiment, as shown in Figure 5, described axle sleeve 10 is provided with boss, and in the folding joint locking process, boss is stirred in push rod 4 bottoms, when push rod 4 turns over the dead point and holds out against.The cross-sectional plane of described axle sleeve also can be made as eccentric annulus, elliptical ring or be provided with the fan-shaped of circular hole, and described boss is located at eccentric annulus, elliptical ring or is provided with a fan-shaped more thick-wall side of circular hole.
Embodiment four, as shown in Figure 6, the present embodiment folding joint is used on the U-shaped vehicle frame, the tail end of handle 3 upwarps along vehicle frame 13, prevent that the people unclamps for running in the process of getting on and off, also can be provided with the handle position limiting structure on vehicle frame 13, after folding joint was folding, the handle position limiting structure can carry out screens to handle 3.
The utility model is not limited only to the foregoing description, and all equivalences of doing according to the described structure of the utility model application range, feature and principle change or substitute, and all should be contained in application range of the present utility model.