CN2906164Y - Folding joint of bar - Google Patents

Abstract

The utility model discloses a folding joint of bar in which a match tread is proved at each end of two bars, the tread has a radial surface and a binding surface, a hinge which is vertical to the binding surface is provided at the side of the axis of the binding surface to articulate the two bars, one section of the bar has a screw to penetrate the binding surface, a radial hole is provided at the upper part of the screw, an eccentric locking rod is inserted into the radial hole, a boss is provided at the lower end of the screw, a groove is provided at another section of the bar to allow the screw pass freely, and the boss of the screw is pressed against the lower end surface of the groove. The utility model realizes the connection and folding of the bars with the need for a connecting plate, the locking device is hidden in the bar with almost no protruding part on the surface to make the appearance look better, the connecting parts of the two bars are matching stepped folded surfaces, the stress surface is not obviously reduced, and no welding is needed, so the strength of the connection is not affected much and is higher than the existing folding joint with connecting plate.

Description

Member folding joint

Technical field:

The utility model relates to a kind of member folding joint.

Background technique:

Folding bicycle, shelf, frame etc. all need to use car beam or a large amount of rod member, in order to transport or to store conveniently, need to use folding joint, common folding joint has two connecting plates that are hinged, fix one section rod member on each plate, can the folding or expansion with rod member easily with quick locking mechanism.

Because connecting plate and rod member normally weld together, intensity has been subjected to bigger weakening, and processing technology complexity, cost is higher, and folded board protrudes from outside the rod member, makes the joint unsmooth, influence the integrity of rod member outward appearance, to Safety performance and the higher occasion of shape requirement, as not only attractive in appearance inadequately when being applied to folding bicycle, and the protrusion of connecting plate causes certain obstruction to the cyclist.

The model utility content:

The purpose of this utility model provides a kind of folding joint, and its structure is simpler, and intensity is higher, and the joint is level and smooth, does not have obvious protrusion, can keep the shaft-like profile of joint substantially.

The purpose of this utility model is achieved in that a kind of member folding joint, the junction point of its two sections rod members has the ladder that matches respectively, ladder has sagittal plane and the junction plane with the rod member radial parallel, the hinge that is positioned at center line of the bar one side is perpendicular to junction plane, two rod members are hinged, wherein one section bar has the bolt-through junction plane, the top of bolt has the hole of center line of the bar direction, in this axial bore, insert the Camlock bar, there is boss the bolt lower end, another section bar has the draw-in groove that this bolt is freed in and out, and the boss of clamping bolt can be pressed on the lower end surface of this groove.

Two sections stepped rod members of the utility model are hinged in a side, when two rod member concentrics, bolt on one section rod member inserts in the draw-in groove, the boss of bolt is under the lower end surface of groove, rotation Camlock bar can spur bolt and move to deviating from the lower end surface direction, boss promptly compresses the lower end surface, makes two rod members clamped fixing.Backward rotation Camlock bar, bolt unclamps, and draws two rod members in, and bolt is released draw-in groove, makes rod member be in folded state.

Because the utility model does not need connecting plate can realize the connection of rod member and folding, locking device is hidden in rod member inside fully simultaneously, substantially there is not protrusion in appearance, make that its profile is more attractive in appearance, the attachment portion of its two sections rod members is the stepped folding face that matches simultaneously, and the stress surface of attachment portion does not significantly reduce, and need not weld, so intensity institute in its joint is influenced less, increase than the folding joint intensity of existing use connecting plate.

Description of drawings:

Fig. 1 is a schematic perspective view of the present utility model;

Fig. 2 is a generalized section of the present utility model;

Fig. 3 is a B-B view of the present utility model

Fig. 4 is a schematic representation of the present utility model.

Embodiment:

Embodiment 1

As depicted in figs. 1 and 2, the junction point of two sections rod members 4,9 respectively has the ladder that matches, ladder has sagittal plane 1 and the junction plane 2 with the rod member radial parallel, the hinge 3 that is positioned at rod member 4 or 9 axis, one side is perpendicular to junction plane 2, two rod members 4,9 are hinged, wherein one section bar 4 has bolt 5 to run through junction plane 2, the top of bolt 5 has radial hole 6, in this radial hole 6, insert Camlock bar 7, there is boss 8 bolt 5 lower ends, another section bar has the draw-in groove 10 that this bolt 5 is freed in and out, and the boss 8 of bolt can be pressed on the lower end surface 11 of this groove 10.

Described junction plane 2 can with the parallel axes of rod member 4,9, also can become an oblique angle with the axis of rod member.If junction plane 2 becomes an oblique angle with the axis of rod member 4,9, when folding joint is opened, when two rod members 4,9 draw in, also be in a respective angles, can satisfy the requirement of some special occasions, normally tilt, use this folding joint as folding bicycle car beam, can make vehicle frame can be folded into the angle of any needs, to reduce the volume behind the bicycle folding as far as possible.

As shown in Figure 3, the motion that in circumference, goes round and begins again for fear of Camlock bar 7 and unexpected the slip occur and cause locking malfunctioning, one section ring-type restraining groove 12 is arranged on Camlock bar 7 circumference, on corresponding rod member, insert a position limit pin 13 with restraining groove 12 corresponding parts.

Embodiment 2

As shown in Figure 4, described junction plane 2 is arranged to a male and fomale(M﹠F), when making folding joint locking, the relative position of two sections rod members is more fixing, and locking effect is better.

Claims (4)

1. member folding joint, it is characterized in that: two sections rod members (4), (9) junction point respectively has the ladder that matches, ladder has sagittal plane (1) and the junction plane (2) with the rod member radial parallel, the hinge (3) that is positioned at rod member (4) or (9) axis one side is perpendicular to junction plane (2), with two rod members (4), (9) hinged, wherein one section bar (4) has bolt (5) to run through junction plane (2), the top of bolt (5) has radial hole (6), in this radial hole (6), insert Camlock bar (7), there is boss (8) bolt (5) lower end, another section bar has the draw-in groove (10) that this bolt (5) is freed in and out, and the boss of bolt (8) can be pressed on the lower end surface (11) of this groove (10).

2. member folding joint according to claim 1 is characterized in that: described junction plane (2) can with the parallel axes of rod member (4), (9), also can become an oblique angle with the axis of rod member (4), (9).

3. member folding joint according to claim 1 is characterized in that: on Camlock bar (7) circumference one section ring-type restraining groove (12) is arranged, insert a position limit pin (13) with restraining groove (12) corresponding part on corresponding rod member.

4. member folding joint according to claim 1 is characterized in that: described junction plane (2) is a male and fomale(M﹠F).