WO2013016958A1

WO2013016958A1 - Foldable bike frame

Info

Publication number: WO2013016958A1
Application number: PCT/CN2012/073700
Authority: WO
Inventors: 韩德玮; 贺新星
Original assignee: 大行科技(深圳)有限公司
Priority date: 2011-08-01
Filing date: 2012-04-10
Publication date: 2013-02-07
Also published as: CN202163556U

Abstract

Provided in the present utility model is a foldable bike frame, applicable primarily as the foldable bike frame for a foldable bicycle or for a foldable electric scooter, comprising a front arm and a middle arm hinged on one side, while the front arm and the middle arm are provided with grooves at a connection on the other side. The grooves comprise a first groove provided at the front arm and a second groove provided at the middle arm. The first groove and the second groove respectively are provided with a handle and a jackshaft. The handle is capable of fitting within the grooves. The handle is provided with a mandrel. The mandrel is capable of gripping tightly the jackshaft. The present utility model is provided with great riding safety and aesthetics, and allows for convenient and expedited operations.

Description

Folding frame technical field

The utility model relates to a folding frame mainly used for folding bicycles and folding electric vehicles. Background technique

Because of fitness and environmental protection, bicycles are becoming more and more popular in people's leisure and life. Among them, folding bicycles are easy to carry, and deep audiences love them. Various folding frames have emerged, but the folding frames on the market are locked by the locking device. On the surface of the frame, during the riding process, the locking device is easily loosened for accidental reasons, such as the rider's leg touching the locking device during the pedaling process, or due to inadvertent movement, Loosen the locking device, posing a safety hazard. Utility model content

The utility model provides a folding frame with a locking structure hidden in view of the above problems.

Another object of the present invention is to provide a folding frame that is safe, reliable, beautiful, and simple in structure.

The utility model is realized as follows:

A folding frame includes a forearm and a middle arm hinged on one side, the forearm and the middle arm being provided with a groove at a joint of the other side, the groove including a first groove and a seat at the forearm a second groove of the middle arm, the first groove and the second groove are respectively provided with a handle and a top shaft, the handle can be accommodated in the groove, and the handle is provided with a ejector, The ram can tighten the top shaft.

The first groove is provided with a top shaft, and the second groove is provided with a handle through the second hinge shaft.

When the folding frame is locked, the top shaft is vertically disposed with the top rod.

The forearm and the middle arm are hinged by a first hinge shaft, and an angle α between the first hinge shaft and the rear wheel axis of the middle arm projected in a horizontal plane is 5° to 12°.

The first hinge axis is parallel to the second hinge axis.

The groove is located at an upper end of the front arm and the middle arm, and a lower end of the front arm and the middle arm is provided with a first hinge shaft.

The groove is located on the left side of the forearm and the middle arm, the first hinge axis is located on the right side of the forearm and the middle arm, and the first hinge shaft is vertically disposed.

The groove is located on the right side of the forearm and the middle arm, the first hinge axis is located on the left side of the forearm and the middle arm, and the first hinge shaft is vertically disposed.

The second hinge shaft is provided with a torsion spring, and the torsion spring is disposed between the two lugs of the handle. The side of the handle is attached to the inner wall of the groove.

The utility model discloses a folding frame, wherein the handle is accommodated in the groove, so that the riding safety and the appearance are good, the groove is placed on the upper end of the forearm and the middle arm, and the first hinge shaft is placed on the forearm. The lower end of the middle arm, the frame is stable, effectively avoiding the possibility of loosening the handle due to the force, and the rider can easily visually recognize the position and state of the handle, and is convenient to operate. DRAWINGS

Figure 1 is a perspective view of the folding frame of the present invention;

2 is a schematic plan view of the first hinge shaft and the rear wheel axis L of the folding frame of the present invention in a horizontal plane; FIG. 3 is a plan view of the folding frame of the present invention;

Figure 4 is a partial cross-sectional view of the folding frame of the present invention;

Figure 5 is a development view of the folding frame of the present invention;

Figure 6 is a partial enlarged view of the folding frame of the present invention. detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

A folding frame, as shown in FIGS. 1-4, includes a forearm 1 and a middle arm 2, the forearm 1 and the middle arm 2 are hinged at a lower end by a first hinge shaft 5, and the upper ends of the front arms 1 and the middle arms 2 are connected The groove 3 includes a first groove 31 at the front arm and a second groove 32 at the middle arm 2. The first groove 31 is provided with a top shaft 4, and the second groove 32 is provided. There is a second hinge shaft 6, the handle 7 is provided with a side plate 71 on the side, and the handle 7 is provided with two lugs 72 at the end, and the handle 7 is laterally disposed with a hinge hole and passes through the two lugs 72, the two lugs 72 A torsion spring 9 is disposed between the second hinge shaft 6 and the torsion spring 9 to connect the handle 7 to the middle arm 2, and the radiation legs at the two ends of the torsion spring 9 respectively fall on the bottom of the groove 3 and the handle On the side plate 71 of the seventh side, the handle 7 can be received in the recess 3, and the handle 7 is provided with a jack 8 which is perpendicular to the top shaft 4, when the tail end of the handle 7 faces the first recess 31 When the bottom direction is rotated, the jack 8 is placed on the top shaft 4, and the front arm 1 and the middle arm 2 of the folding frame are fixed by the cooperation of the jack 8 and the top shaft 4. The function of the torsion spring 9 is that when the folding frame is released, the beam of the torsion spring 9 causes the handle 7 to bounce, preventing the front arm 1 and the middle arm 2 of the frame from being engaged, and the handle 7 is under the action of gravity. Between the forearm 1 and the middle arm 2. During use, the handle 7 is placed in the recess 3, which is not easy to touch, reducing the possibility of accidental loosening of the frame during use, and the forearm 1 and the middle arm 2 of the folding frame are mainly stressed upward, the forearm The joint between the upper end of 1 and the middle arm 2 is under pressure, so the folding frame is safe and reliable.

In the above embodiment, the recess 3 is placed at the upper end of the front arm 1 and the middle arm 2, and the lower end of the first hinge shaft 5 at the front arm 1 and the middle arm 2 is a preferred embodiment of the present invention, and the user can conveniently visually lock the frame. Easy to fold, of course, groove 3 is located on the left side of the forearm 1 and the middle arm 2, and the first hinge shaft 5 is located on the right side of the front arm 1 and the middle arm 2, and accordingly, the hinge shaft is vertically disposed, which is also achievable. In the above embodiment, in order to make the forearm 1 and the middle arm 2 staggered at an angle after folding, the angle α of the first hinge shaft 5 and the rear wheel axis L of the middle arm 2 projected in the horizontal plane is 5° to 12°, preferably 7°, as shown in FIG. 2, when the first hinge shaft 5 and the second hinge shaft 6 are arranged in parallel, the handle 7 rotates along the folding direction of the frame, and the folding frame is more reasonable, and when locked, Robust, as shown in Figure 6. The side of the handle 7 is attached to the inner wall of the recess 3, and the structure is more compact. There is a gap between the tail end of the handle 7 and the wall of the recess 3. When the frame needs to be folded, it is easy to manipulate the tail end of the handle 7, and release the forearm 1 and the middle. Arm 2.

In the above embodiment, the top shaft 4 is disposed in the first recess 31, and the handle 7 is disposed in the second recess 32. In actual use, the top shaft is disposed in the second recess, and the handle is disposed in the first recess. When the jack on the handle is tightened with the top shaft, the folding frame can also be locked.

Claims

Rights request

A folding frame comprising a forearm (1) and a middle arm (2) hinged on one side, characterized in that the forearm (1) and the middle arm (2) are provided with grooves at the joint of the other side (3) the groove includes a first groove (31) at the forearm and a second groove (32) at the middle arm, the groove (3) being provided with a handle (7) and a top shaft (4), one of the handle (7) and the top shaft (4) is disposed on the first groove (31), and the other is disposed in the second groove (32), the handle (7) can be accommodated in the groove (3), the handle (7) is provided with a ram (8), and the ram (7) can press the top shaft (4).

2. The folding frame according to claim 1, wherein said first groove (31) is provided with a top shaft (4), the second groove ⁽³²⁾ by a second hinge shaft ( 6) With handle (7).

3. A folding frame according to claim 2, characterized in that the top shaft (4) is arranged perpendicular to the jack (8) when the folding frame is locked.

4. The folding frame according to claim 2, wherein the front arm (1) and the middle arm (2) are hinged by a first hinge shaft (5), the first hinge shaft (5) and the middle The angle α of the rear wheel axis (L) of the arm (2) projected in the horizontal plane is 5. To 12. .

The folding frame according to claim 4, characterized in that the first hinge shaft (5) is parallel to the second hinge shaft (6).

6. The folding frame according to claim 2, wherein the groove (3) is located at an upper end of the forearm (1) and the middle arm (2), and the lower ends of the front arm (1) and the middle arm (2) Set the first hinge shaft (5).

7. The folding frame according to claim 2, wherein the groove (3) is located on the left side of the front arm (1) and the middle arm (2), and the first hinge shaft (5) is located on the forearm (1) And the right side of the middle arm (2), the first hinge shaft (5) is vertically disposed.

8. The folding frame according to claim 2, wherein the groove (3) is located on the right side of the forearm (1) and the middle arm (2), and the first hinge shaft (5) is located on the forearm (1) And the left side of the middle arm (2), the first hinge shaft (5) is vertically disposed.

The folding frame according to claim 2, characterized in that the second hinge shaft (6) is provided with a torsion spring (9), and the torsion spring (9) is placed on the handle (7) Between the lugs (72).

The folding frame according to any one of claims 1 to 9, characterized in that the side of the handle (7) is fitted to the inner wall of the recess (3).