TWM522899U - Reinforced pull cable folding vehicle frame with lower tube - Google Patents

Description

Reinforced cable folding frame with lower tube

The present invention relates to a folding frame, and more particularly to a reinforcing cable folding frame with a lower tube.

Folding bicycles around the world has become very popular, accounting for about one-tenth of the total bicycle production. The annual retail sales are more than $2.5 billion, and it is growing at a high speed. Electric folding bikes are also gaining popularity and have great potential. However, in order to control the weight, cost and folding volume, the folding frame on the market adopts a single beam structure, and most of them have hidden dangers of strength and safety. This creation proposes an effective solution to this problem.

According to the folding method, most of them are horizontal folding bicycles, and a small number are longitudinal folding bicycles. As shown in Figures 1 and 2, the horizontal folding car is that the front and rear sections of the front frame are connected as a solid via a high-strength folder chain, and the folding device is opened when folded, and the front and rear halves are folded horizontally so that the front and rear wheels are substantially close together. . Usually, it is very important that the rigid lower tube is welded to the five-way pipe and extended to the frame. The lower tube is subjected to the push, pull and torsion during the riding process, so that the driving force received during riding can be effectively transmitted to the head. The tube, the fork and the front wheel connected to the ground are essential for effective propulsion and balance control! As shown in Figures 3 and 4, the longitudinal folding bicycle refers to the front and rear sections of the vehicle beam hinged, and the hinge shaft is arranged laterally. When folded, the front and rear wheels rotate around the hinge shaft in the vertical plane until the front and rear wheels are close together; for example, Chinese patent CN201020515083 .5 published "longitudinal folding bicycle".

For the sake of convenience, some folding vehicles adopt the ropes on the body to replace the original pipe fittings. This is not considered well, because the pipe fittings of the frame each bear the heavy rigidity and strength, that is, the multi-directional pulling force. They must be effectively tolerated, pushed and twisted, and cannot be easily replaced by the tension of a cable . In particular, the lower leg of the frame is usually connected to the five-way pipe and the front pipe, and its torsional stiffness is critical to riding efficiency and control. The patents and concepts of replacing the pipe fittings with the cable have existed for decades, and the products have rarely been seen so far. Consumers have sufficient common sense and it is also unacceptable. For example, the disclosed Chinese patent CN200720181537.8, as shown in Figures 5 and 6, is provided with a soft beam 3 on the lower side of the beam tube 1. In the riding state, the soft beam 3 provides tension to maintain the stability of the vehicle body and a certain strength. During storage, the body is folded longitudinally, and the soft beam 3 is naturally bent, which is not inconvenient, and is very convenient; however, the soft beam 3 lacks pre-tightening force and is not convenient to adjust. At the same time, it does not have a rigid lower tube, and the rigidity of the frame torsion is greatly affected, affecting the propulsion efficiency, and there are safety hazards, which is not desirable.

For example, U.S. Patent No. 2,050,121, 877 discloses "Bicycle Frame", with reference to Figures 7 and 8, with a cable 45 disposed under the bicycle beam. In the riding state, the cable 45 provides tensile force to increase the stability of the vehicle body, and the cable 45 The spring end connector 51 is connected to the rear end to achieve a certain pre-tightening action, but the spring connector 51 is inconvenient to adjust the pre-tightening force, and at the same time, the spring will relax, so that the tension provided by the cable 45 during riding is insufficient. Safety hazard; the rear triangle of the frame can be folded after being loosened, and the cable 45 is loose. At the same time, it does not have a rigid lower tube, and the frame has a certain strength problem when subjected to force. The mainstream single-beam frame of today's folding bikes is indeed easy to break in the place where the single beam and the folder are welded in the front section. It cannot pass the industry safety inspection standard and has great safety hazards. However, there is currently no commercial car with a folding car with a reinforcing cable. There are some safety strength problems, how to adjust it easily and make it acceptable to the public, and it is a difficult point to tackle. It can be seen from the foregoing that how to solve the present problem has its own uniqueness, and is not very easy to be considered by those skilled in the art.

Therefore, this creation proposes a reinforced cable folding frame with a lower tube. The specific structure and its implementation will be described in detail below:

The main purpose of this creation is to provide a reinforced reinforcing cable folding frame with a simple structure, high strength, easy processing and installation, easy and labor-saving folding action, and easy to promote to solve the long-term large-scale and expanding safety. Hidden dangers.

The purpose of the creation is as follows: a reinforced pull-up folding frame with a lower tube, including a front frame of the front frame, a foldable frame at the rear of the front frame, and a lower tube connecting the rear section of the front frame with the five-way pipe, and The two ends are respectively connected to the front part of the front frame and the cable near the five-way pipe. The front part of the front frame and the rear part of the front frame are hinged by a vertical hinge shaft vertically arranged by the folder, and one end of the cable is connected with the fixed ear. The other end of the cable is connected to the fixing seat; the fixing ear is disposed at any position near the front frame of the front frame or the five-way pipe, and the fixing seat is disposed near the front frame of the front frame or the five-way pipe and is opposite to the fixed ear Position; the folder is located above the cable.

One end of the cable is connected to an elastic device, and the elastic device is disposed at the fixing ear, and the elastic device connects the cable end and tensions or loosens the cable.

The elastic device is provided with an eccentric self-locking mechanism.

The elastic device is a quick release device, and the quick release device comprises a connected eccentric plate and a handle, the eccentric plate has an eccentric hole, and the screw fixes the quick release device to the fixed ear through the eccentric hole; the eccentric plate is further provided with an axis parallel to The mounting hole of the eccentric hole shaft has a notch; the upper end of the cable is fixedly provided with a cross bar, and the cross bar is disposed in the mounting hole.

The notch width is larger than the cross-sectional diameter of the cable, the diameter of the mounting hole is larger than the cross-sectional diameter of the cross bar, and the notch width is smaller than the diameter of the mounting hole.

The eccentric plate is divided into two left and right pieces, and a groove is arranged between the two eccentric plates, and an end portion of the cable is received in the groove.

The fixing ear has two left and right lugs, and the two eccentric plates of the quick release device are respectively hingedly connected with the two lugs, and the screws are also two left and right, and the screws lock the eccentric plate and the lug.

The elastic device is a pulling device, and the pulling device has a handle and an eccentric plate. The eccentric plate has an eccentric hole, and the clamping device is hingedly fixed to the fixing ear by a screw through an eccentric hole, and the eccentric plate is further provided with an axis parallel In the mounting hole of the eccentric hole axis, the C-shaped connecting portion is fixedly disposed on the upper end of the cable, the eccentric plate is divided into two left and right pieces, and the left and right eccentric plates are provided with a groove, and the C-shaped connecting portion is connected to the eccentric A groove is provided between the plates and is locked by the screw through the mounting hole.

When the cable is tensioned, the eccentric hole is located below the cable axis.

The front part of the front frame is Y-shaped, and the front part of the front frame has two single arms; the folding device is connected with the upper arm of the front part of the front frame and the rear part of the front frame, and the upper end of the vertical hinge shaft is connected with the rear part of the front frame, the vertical hinge The lower end of the shaft is connected to the lower tube.

The cable is connected to the fixing seat by a fine adjustment device, which is a fine adjustment device with a screw.

The cable is any one of a steel wire rope, a plurality of metal rings that are continuously interlocked, and a plurality of rod-shaped bodies that are connected to each other in a plurality of stages.

The reinforcing cable folding frame with the lower tube is provided with a cable between the front and rear sections of the front frame, which can greatly increase the stability and safety strength of the riding; the upper end of the cable can be quickly opened by the quick release device or Closed, quick operation; the structural design of the quick release device has a dead point, and the handle is not accidentally loosened during riding, so it becomes a safety device; the lower end of the cable is also designed with a fine adjustment device, which can flexibly grasp the pull The tension of the cable.

The details of the creation, the technical content, the features and the effects achieved by the present invention are more easily explained by the detailed description of the specific embodiments.

The reinforcing cable folding frame of the present invention with the lower tube will be further described in detail below with reference to the accompanying drawings:

As shown in FIG. 9, in the first embodiment of the present invention, the belt folding frame has a foldable frame 100 including a front frame front section 11 and a front frame rear section 12, and two ends are respectively connected to the front vehicle. The front section 11 and the cable 2 of the five-way pipe 15. A high-strength folder 13 is disposed between the front frame front section 11 and the front frame rear section 12, and the folder 13 is positioned above the cable 2. A vertical hinge shaft 131 is vertically disposed at a side of the folder 13, and the front frame front section 11 and the front frame rear section 12 are hinged by the vertically disposed vertical hinge shaft 131. One end of the cable 2 is connected to the fixing ear 30 of the front section of the front frame through the quick release device 5, and the other end of the cable 2 is connected to the fixing base 4 near the five-way pipe 15. For example, the fixing base 4 may be directly disposed on the five-way pipe 15, or the fixing base 4 may be disposed at the lower end of the lower pipe 16 connected to the five-way pipe 15, or the fixing base 4 may be disposed at the connection with the five-way pipe 15. The lower end of the seat tube 14.

As shown in FIG. 10, the quick release device 5 has a handle 52. The front end of the handle 52 is provided with an eccentric plate 51 having an eccentric hole 53. The quick release device 5 is fixed to the quick release device 5 through the eccentric hole 53 by a screw 7. The aforementioned fixing ear 30 forms a rotatably connected connection between the quick release device 5 and the fixing ear 30. In addition, the eccentric plate 51 is further provided with a mounting hole 54 whose axis is parallel to the eccentric hole 53. The upper end of the cable 2 is fixedly provided with a cross bar 21 having a notch 55 having a width larger than the cross-sectional diameter of the cable 2, and the mounting hole 54 having a diameter larger than the cross-sectional diameter of the cross bar 21 so as to facilitate the cross bar 21 The cable 2 is placed in the mounting hole 54 through the notch 55, and the width of the notch 55 is smaller than the diameter of the mounting hole 54 to prevent loosening. The eccentric plate 51 is divided into two left and right pieces, and a groove 56 is disposed between the left and right eccentric plates 51. When the crossbar 21 is mounted in the mounting hole 54, the end of the cable 2 is received in the recess 56.

Further, the fixing ear 30 has left and right lugs, and the left and right eccentric plates 51 of the quick release device 5 are respectively hingedly connected to the two lugs, and the screws 7 are also left and right, and the screws 7 are locked and convex. The ear, the eccentric plate 51 rotates along the screw 7, while the screw 7 does not protrude or slightly protrudes from the groove 56 between the two lugs to prevent the cable 2 from interfering with the screw 7 during the rotation or scraping bump.

The other end of the cable 2 is connected to the fixing base 4 of the rear stage of the front frame through the fine adjustment device 6. The lower end of the cable 2 is movably connected to the fine adjustment device 6, and the fine adjustment device 6 is screwed to the aforementioned fixing base 4. Further, the fine adjustment device 6 has an external thread, and the fixing base 4 has an internal thread, and the two are matched. The fixing base 4 can be welded and fixed to the five-way pipe 15 or the lower pipe 16, or the seat pipe 14, according to the actual shape and needs of the frame. Referring to Figures 3 and 9, the lower end of the cable 2 has a spherical body 22 which engages the end of the fine adjustment device 6 so that the two do not detach and simultaneously ensure that the two can rotate relative to each other.

As shown in Figures 11 and 15, when the frame is closed, the upper handle shank 52 rotates the eccentric plate 51 so that the eccentric hole 53 passes over the cable 2, and finally the eccentric hole 53 is located below the axial line of the cable 2, at this time, The tension of the cable 2 is increased by turning the fine adjustment device 6. In the bicycle riding, the cable 2 will generate a pulling force to tighten the front frame of the front frame and the rear section of the front frame. Since the eccentric hole 53 is located below the cable 2 in the working state, even if the road surface is bumpy or other reasons When it is shaken, the handle 52 does not have the risk of being turned down and loosened, because the structure can generate a rotation dead point. In addition, in the present construction structure, the anti-torsion capability of the frame is remarkably enhanced after the cable 2 is tightened.

Please refer to the 13th and 14th pictures at the same time. In the non-riding state, if you want to fold the whole vehicle, move the handle 52 down to relax the cable 2, then rotate the front frame front and front in the horizontal direction. The rear section of the frame is close to the same, which is very convenient and labor-saving.

A conventional lateral folding cart is provided with a folder, a vertical hinge shaft is arranged on one side of the folder, and a locking device such as a handle is arranged on the other side of the folder. As shown in Fig. 12, since the cable 2 is provided between the front frame of the front frame and the rear section of the front frame, it acts as a tension, so theoretically, as long as the cable strength is good enough, It is necessary to provide a locking device 132 on the other side of the folder 13 to fully meet the requirements of riding. Further, in order to make the ride safer and stronger, the locking device 132 can also be provided on the other side of the folder 13, except that one step is added when the frame is locked or opened.

As shown in Fig. 16, the second embodiment of the present invention has a cable folding frame. The foldable frame 100 includes a front frame front section 11 and a front frame rear section 12, the front frame front section 11 is a Y-shaped type, and the front section of the Y-shaped front frame has two single arms. The folder 13 is connected to the upper arm 111 of the front frame front section 11 and the front frame rear section 12. A vertical hinge shaft 131 is disposed between the upper arm 111 of the front frame front section 11 and the front frame rear section 12, and the vertical hinge shaft is disposed. The upper end of the 131 is connected to the rear frame 12 of the front frame. The lower end of the vertical hinge shaft 131 is connected to the lower tube 16, and the other end of the lower tube 16 is fixed to the five-way tube 15. The upper end of the lower tube 16 is connected to the rear frame 12 of the front frame through the vertical hinge shaft 131, and the upper end of the lower tube 16 abuts the lower arm 112 of the front portion 11 of the front frame, and the abutting faces of the two are horizontal. The upper arm 111, the lower arm 112, the front frame rear section 12, the seat tube 14 and the lower tube 16 of the front frame front section 11 together form an approximately triangular structure, which is very stable. The upper end of the vertical hinge shaft 131 is provided with a locking device 132. When the locking device 132 is opened, the front frame front section 11 and the front frame rear section 12 can be rotated in the horizontal direction of the vertical hinge shaft 131 for folding. The front end of the cable 2 is connected to the front section of the front frame, and the rear end of the cable 2 is connected to the fixing base 4 near the five-way pipe. For example, the fixing base 4 can be directly disposed on the five-way pipe 15, or the fixing base 4 can be disposed on the The lower end of the lower tube 16 connected to the five-way tube 15 or the lower side of the seat tube 14 connected to the five-way tube 15 is provided. The structure and the connection manner of the cable 2 are the same as those in the first embodiment, and details are not described herein again. In addition, in the present embodiment, due to the specific structural form of the frame, the elastic device may not be separately provided at the end of the cable, because in the riding state, the cable can be naturally pulled to the tightest.

As shown in Figures 17 and 18, the third embodiment of the present invention has a cable folding frame. In this embodiment, the structure of the frame is the same as that of the first embodiment, with the difference being the connection mode of the cable 2. One end of the cable 2 is connected to the fixing ear 30 of the front frame of the front frame by a pulling device 57, and the other end of the cable 2 is connected to the fixing base 4 near the five-way pipe 15. The triggering device 57 has a handle, and the front end of the handle is provided with an eccentric plate. The eccentric plate has an eccentric hole 53 through which the triggering device 57 is fixed to the fixing ear 30 by a screw, and the clamping device 57 and the fixing device are fixed. A rotatable connection is formed between the ears 30. In addition, the eccentric plate is further provided with a mounting hole whose axis is parallel to the axis of the eccentric hole 53. The upper end of the cable 2 is fixedly provided with a C-shaped connecting portion 23; the eccentric plate is divided into two left and right pieces, and a groove is disposed between the left and right eccentric plates. The C-shaped connecting portion 23 is connected to a groove provided between the eccentric plates, and is locked by a screw through the aforementioned mounting hole. When the frame is closed, the handle of the triggering device 57 is turned up, the eccentric plate is rotated, the eccentric hole 53 is passed over the cable 2, and finally the eccentric hole 53 is located below the cable 2 and the mounting hole. Also located below the 2 axis of the cable. The other end of the cable 2 is connected to the fixing base 4 of the rear stage of the front frame through the fine adjustment device 6. The lower end of the cable 2 is movably connected to the fine adjustment device 6, and the fine adjustment device 6 is screwed to the aforementioned fixing base 4. Further, the fine adjustment device 6 has an external thread, and the fixing base 4 has an internal thread, and the two are matched. The lower end of the cable 2 has an adjustment portion 24, the end of which has a thread and is screwed to the fine adjustment device 6.

In the foregoing first, second and third embodiments, in order to further enhance the safety, an automatic safety buckle may be arranged on the frame, and the safety buckle is arranged near the handle of the handle 52 or the quick release device 57, and the handle is up to When the cable 2 is tightened, the safety buckle just snaps the handle to prevent the handle from being accidentally touched, and the above-mentioned structure "dead point" is designed to achieve double insurance. The partial design of the safety buckle can be found in another published Chinese patent CN200620154753.9.

As shown in Fig. 19, the fourth embodiment of the present invention has a cable folding frame. The front frame front section 11 and the front frame rear section 12 are hingedly connected by a vertical hinge shaft 131. One end of the cable 2 is hingedly connected to the fixing ear 30 of the front frame of the front frame, and the other end of the cable 2 is connected to the fixing base 4 near the five-way pipe 15, for example, the fixing seat 4 can be directly disposed on the five-way pipe 15, or The fixing base 4 is provided at the lower end of the lower tube 16 connected to the five-way pipe 15, or the fixing seat 4 is provided at the lower end of the seat tube 14 connected to the five-way pipe 15. A fine adjustment device is disposed between the cable 2 and the fixing base 4. The structure and the connection relationship of the fine adjustment device may be any one of the first and third embodiments. A tensioning device 58 is disposed in the middle of the cable 2, and the elastic device 58 can pull the cable 2 to be loosened and then released. For example, the threaded end 25 can be disposed on the cable 2, and the elastic device 58 has internal threads at both ends, and rotates the cable 2 The elastic device 58 can loosen or tighten the cable 2.

For example, the 20th and 21st drawings are the fifth embodiment of the inventive belt-folding frame. The front frame front section and the front frame rear section are hingedly connected by a vertical hinge shaft 131. One end of the cable 2 is hingedly connected to the fixing ear 30 of the front frame of the front frame. The fixing ear 30 is disposed on one side of the front frame of the front frame and the other end of the cable 2 is connected to the vicinity of the five-way pipe 15. A fine adjustment device 6 is disposed between the seat 4, the cable 2 and the fixed base 4. In this embodiment, the cable 2 is entirely located on one side of the front frame, and the axis of the vertical hinge shaft 131 passes through the cable 2 just. In this embodiment, due to the specific structure, it is also possible to provide a separate elastic device at the end of the cable, because the cable can be naturally loosened by opening the locking device 132.

In the foregoing embodiments, the fine adjustment device 6 and the elastic device 58 may be simultaneously disposed at the same end of the cable 2. For example, the elastic means is disposed at the fixed ear 30, and has a fine adjustment means at the end of the cable connecting the elastic means, the fine adjustment means being threadedly coupled to the cable.

The cable 2 in the foregoing embodiments can generate a longitudinal tensile force, for example, a steel wire rope, a plurality of metal rings that are continuously interlocked, a plurality of rod-shaped bodies that are connected together in front and rear, and the like.

Regarding the fixing ear 30 and the fixing manner of the fixing base 4 and the frame, in a predetermined version of the folding car, the connection can be fixed by welding, which is more secure. In addition, on some versions of the frame, the mounting hole can be reserved, so that the user can screw the fixing ear 30 and the fixing seat 4 to the frame by screws, and then fix the ear 30 and the fixing seat 4 The cable 2 in the foregoing embodiment is disposed between, and the advantage is that the user can choose to install the cable or not to install it to meet the DIY market demand.

In the foregoing embodiments, the fixed ear 30 is disposed on the front frame 11 of the front frame, and the fixed seat 4 is disposed near the five-way pipe. In fact, the position of the fixed ear 30 and the fixed seat 4 can be reversed, that is, The fixing ear 30 is disposed near the five-way pipe, and the fixing seat 4 is disposed at the front frame 11 of the front frame. In summary, the fixing lug 30 is disposed at any position near the front frame or the five-way pipe of the front frame, and the fixing seat 4 is disposed at a position adjacent to the front frame or the five-way pipe of the front frame and opposite to the fixing ear 30. .

In the foregoing embodiments, the "near pass" includes the five-way pipe itself, the lower end of the lower pipe 16 connected to the five-way pipe, or the lower end of the seat pipe 14 connected to the five-way pipe.

In the foregoing embodiments, the ends of the cable 2 are as far as possible away from the folder 13, so that better mechanical effects and riding experience can be obtained.

Through experimental testing, the above-mentioned reinforced cable folding frame can meet and exceed the requirements of the industry safety standards.

One end of the cable 2 is connected to the frame, and the other end can be unwound and disengaged from the frame, such as wrapped around a trunk, a railing or the like, for use as a lock.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, any change or modification of the characteristics and spirit described in the scope of this application shall be included in the scope of the patent application for this creation.

1‧‧‧ beam tube
3‧‧‧soft beams
45‧‧‧ Cable
51‧‧‧Spring connector
10‧‧‧Folding frame
11‧‧‧Front of the front frame
111‧‧‧ upper arm
112‧‧‧ Lower arm
12‧‧‧After the front frame
13‧‧‧Folder
131‧‧‧Vertical hinge
132‧‧‧Locking device
14‧‧‧ seat tube
15‧‧‧5-way pipe
16‧‧‧Under the tube
2‧‧‧Laso
21‧‧‧crossbar
22‧‧‧ spheroid
23‧‧‧C type connection
24‧‧‧Regulatory Department
25‧‧‧Threaded end
30‧‧‧ fixed ear
4‧‧‧ Fixed seat
5‧‧‧Quick release device
51‧‧‧Eccentric board
52‧‧‧handle
53‧‧‧Eccentric hole
54‧‧‧ mounting holes
55‧‧‧ gap
56‧‧‧ Groove
57‧‧‧Twisting device
58‧‧‧ elastic device
6‧‧‧ fine-tuning device
7‧‧‧ screws

Fig. 1 is a schematic view showing the state in which the lateral folding cart is opened in the prior art. Fig. 2 is a schematic view showing the folded state of the lateral folding cart in the prior art. Figure 3 is a schematic view showing the open state of the longitudinal folding cart in the prior art. Fig. 4 is a schematic view showing the folded state of the longitudinal folding cart in the prior art. Fig. 5 is a schematic view showing the open state of a single beam vehicle with a soft beam in the prior art. Fig. 6 is a schematic view showing the folded state of a single beam vehicle with a soft beam in the prior art. Fig. 7 is a schematic view showing the open state of the single beam vehicle with a cable in the prior art. Figure 8 is a schematic view showing the folded state of a single beam vehicle with a cable in the prior art. Figure 9 is an exploded view of the reinforcing cable folding frame with the lower tube. Figure 10 is an enlarged view of the cable quick release device of the reinforcing cable folding frame with the lower tube. Fig. 11 is a front view showing the unfolded state of the reinforcing cable folding frame of the creative lower tube. Fig. 12 is a bottom view showing the unfolded state of the reinforcing cable folding frame of the creative lower tube. Figure 13 is a schematic view of the reinforcing cable folding frame of the creative belt with the lower tube. Figure 14 is a schematic view showing the folded state of the reinforcing cable folding frame with the lower tube. The fifteenth figure is a partial schematic view of the reinforcing cable folding frame with the lower tube. Figure 16 is a schematic view showing a second embodiment of a reinforcing cable folding frame with a lower tube. Figure 17 is an exploded view of a third embodiment of a reinforcing cable folding frame with a lower tube. Figure 18 is a cross-sectional view showing a third embodiment of a reinforcing cable folding frame with a lower tube. Figure 19 is a schematic view showing a fourth embodiment of a reinforcing cable folding frame with a lower tube. Fig. 20 is a front elevational view showing the fifth embodiment of the reinforcing cable folding frame with the lower tube. Figure 21 is a bottom plan view showing a fifth embodiment of a reinforcing cable folding frame with a lower tube.

10‧‧‧Folding frame

11‧‧‧Front of the front frame

12‧‧‧After the front frame

13‧‧‧Folder

131‧‧‧Vertical hinge

14‧‧‧ seat tube

15‧‧‧5-way pipe

16‧‧‧Under the tube

2‧‧‧Laso

21‧‧‧crossbar

22‧‧‧ spheroid

30‧‧‧ fixed ear

4‧‧‧ Fixed seat

5‧‧‧Quick release device

6‧‧‧ fine-tuning device

Claims (12)

A reinforcing cable folding frame with a lower tube, comprising a front frame front section and a front frame rear folding section, a lower tube connecting the rear frame rear section and a five-way tube, and two ends respectively connected a cable in the front section of the front frame and in the vicinity of the five-way pipe; the front frame of the front frame and the rear section of the front frame are hinged by a vertical hinge shaft disposed vertically by a folder, the pulling One end of the cable is connected to at least one fixing ear, and the other end of the cable is connected to a fixing seat; the fixing ear is disposed at any position near the front frame of the front frame or the five-way pipe, and the fixing seat is disposed on the front frame Another position in the vicinity of the front section or the five-way tube and opposite the fixed ear; the folder is located above the cable. The reinforcing cable folding frame with a lower tube according to claim 1, wherein one end of the cable is connected with an elastic device, the elastic device is disposed at the fixing ear, and the elastic device is connected to the end of the cable And tighten or loosen the cable. The reinforcing cable folding frame with a lower tube as claimed in claim 2, wherein the elastic device is provided with an eccentric self-locking mechanism. The reinforcing cable folding frame with a lower tube according to claim 2, wherein the elastic device is a quick release device, and the quick release device comprises two connected eccentric plates and a handle, the eccentric plate having at least one eccentricity a hole through which the quick release device is fixed to the fixed ear; the eccentric plate is further provided with a mounting hole whose axis is parallel to the axis of the eccentric hole, the mounting hole has a notch; the cable The upper end is fixedly provided with a cross bar, and the cross bar is disposed in the mounting hole. The reinforcing cable folding frame with a lower tube according to claim 4, wherein the width of the notch is larger than the cross-sectional diameter of the cable, the diameter of the mounting hole is larger than the cross-sectional diameter of the cross bar, and the width of the notch Less than the diameter of the mounting hole. The reinforcing cable folding frame with a lower tube as claimed in claim 4, wherein the eccentric plate is divided into two left and right pieces, and a groove is disposed between the eccentric plates, and the end of the cable is received in the concave portion. Inside the slot. The reinforcing cable folding frame with a lower tube according to claim 6, wherein the fixing ear has left and right lugs, and the two eccentric plates of the quick release device are respectively hingedly connected with the two lugs. The screw is also two on the left and the right, and the screw locks the eccentric plate and the lug. The reinforcing cable folding frame with a lower tube as claimed in claim 2, wherein the elastic device is a pulling device, the pulling device has a handle and two eccentric plates, and the eccentric plate has an eccentric hole, at least A screw is hingedly fixed to the fixing ear through the eccentric hole, and the eccentric plate is further provided with a mounting hole whose axis is parallel to the axis of the eccentric hole, and the C-shaped end is fixedly disposed on the upper end of the cable a connecting portion, the eccentric plate is divided into two left and right pieces, and a groove is disposed between the eccentric plates, the C-shaped connecting portion is connected to the groove provided between the eccentric plates, and the screw passes through the mounting hole Locked. A reinforcing cable folding frame with a lower tube as claimed in claim 4, 5 or 6 or 7 or 8, wherein the eccentric hole is located below the axis of the cable when the cable is tensioned. The reinforcing cable folding frame with a lower tube according to claim 1, wherein the front frame has a Y-shaped front section, and the front frame has two single arms at a front portion; the folder is connected to the front portion of the front frame An upper arm and a rear portion of the front frame, the upper end of the vertical hinge shaft is connected to the rear portion of the front frame, and the lower end of the vertical hinge shaft is connected to the lower tube. A reinforcing cable folding frame with a lower tube as claimed in claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, wherein the cable is connected to the fixing seat by a fine adjustment device, the fine adjustment device is a belt Screw fine adjustment device. A reinforcing cable folding frame with a lower tube as claimed in claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, wherein the cable is a steel wire rope, a plurality of metal rings or a plurality of segments that are continuously interlocked Any of the rods connected together before and after.