A folding bicycle frame

Abstract

The utility model relates to the technical field of bicycle, and disclose a folding bicycle frame, one third position department of cross pipe is provided with folding subassembly, the folding subassembly includes two symmetrical flange plates, and the side surface between two flange plates is through hinged axle sleeve and hinged axle rod and is movably connected each other, and the other side surface of two flange plates is detachably connected through the lock catch, after the frame is unfolded, the wrench plate is rotated and is pressed on the cross pipe, wherein the U-shaped clamping groove is sleeved on the shaft rod, realizes the locking of two section cross pipes, and then the spring pushes the plug-in rod and inserts to four clamping claws, and the convex ball in the inside of clamping claw is clamped in the annular groove, realizes the locking of plug-in rod, the sliding sleeve is in the cross pipe of left side, and the plug-in rod is in the cross pipe of right side, after the butt joint of two cross pipes, the junction will not easily shake, thereby guarantee that the whole frame will not be active relaxation because of the lock catch connection after unfolding, and then the firmness of connection is improved.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, specifically a folding bicycle frame. Background Technology

[0002] As the skeleton of the entire bicycle, the frame largely determines and influences the correctness and comfort of riding posture. To reduce the space occupied by the bicycle, a folding frame is designed. Conventional frames fold using hinges, with bolts used to fix the other side, or sometimes using latches. Bolt connections are cumbersome to disassemble; while latch connections are convenient to disassemble, loosening can occur at the joints. Therefore, a folding bicycle frame is proposed. Utility Model Content

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a folding bicycle frame that has the advantage of not becoming loose due to the locking mechanism when unfolded, thus solving the aforementioned problems.

[0004] (II) Technical Solution To achieve the goal of preventing loosening due to the locking mechanism after unfolding, this utility model provides the following technical solution: a folding bicycle frame, including a horizontal tube, a vertical tube fixedly installed at one end of the horizontal tube, a rear fork fixedly installed on the side of the vertical tube, a front fork mounting tube fixedly installed at the other end of the horizontal tube, a diagonal beam fixedly installed between the horizontal tube and the vertical tube, and a folding assembly provided at one-third of the horizontal tube. The folding assembly includes two symmetrically arranged flanges, the sides of the two flanges are movably connected to each other by a hinge sleeve and a hinge rod, and the other sides of the two flanges are detachably connected by a locking fastener. The locking component includes a wrench plate, on the side of which an elliptical collar and a U-shaped groove are fixedly installed. A protrusion is fixedly installed at the middle of the inner wall of the elliptical collar. A shaft is inserted inside both the elliptical collar and the U-shaped groove. The shaft is installed on the side of the flange via a mounting base.

[0005] Preferably, a spring is inserted inside the horizontal tube on the left side, one end of the spring is inserted inside the sliding sleeve, a rod is fixedly installed on the side of the sliding sleeve, two annular grooves are opened on the outer side of the rod, and the end of the rod is spherical.

[0006] Preferably, a limiting ring is fixedly installed at the opening of the right horizontal tube, a positioning plate is fixedly installed inside the right horizontal tube, four claws are fixed on the side of the positioning plate, and a convex ball corresponding to the ring groove is fixedly installed on the inner side of the claw.

[0007] Preferably, a push plate is fixedly installed on the top of the sliding sleeve by a support rod, and a strip hole corresponding to the support rod is opened on the top of the horizontal tube on the left side.

[0008] (III) Beneficial Effects Compared with the prior art, the present invention provides a folding bicycle frame, which has the following advantages: 1. This folding bicycle frame, when unfolded, allows the wrench to be rotated and pressed onto the cross tubes. The U-shaped slot will fit onto the axle, locking the two cross tubes. Then, the spring pushes the insert rod through the limiting ring and into the four claws. The protruding ball on the inside of the claw will lock in the ring groove, locking the insert rod. The sliding sleeve is in the left cross tube, and the insert rod is in the right cross tube. After the two cross tubes are connected, the joint will not easily wobble, thus ensuring that the entire frame will not loosen due to the locking connection when unfolded, thereby improving the connection's firmness. 2. This folding bicycle frame, by applying force to the wrench plate to tighten it outwards, the axle in the elliptical collar slides past the protrusion to the left side of the elliptical collar, increasing the space for movement between the U-shaped slot and the axle on the right side, thus facilitating the application of force to open the wrench plate; by pushing the plate to drive the sliding sleeve to move backwards, the insert rod follows and moves backwards away from the pawl, the pawl releases the locking of the insert rod, thus facilitating the folding of the two cross tubes. The hinge sleeve and hinge rod have damping force to ensure that the two cross tubes do not wobble after folding. This process realizes the folding of the entire frame. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the horizontal tube and folding assembly of this utility model; Figure 3 This is an exploded structural diagram of the horizontal tube and folding assembly of this utility model; Figure 4 This is a cross-sectional structural diagram of the horizontal tube and folding assembly of this utility model; Figure 5 This is a cross-sectional exploded view of the insertion rod and the claw of this utility model; Figure 6 This is another cross-sectional structural diagram of the insertion rod and the claw of this utility model; Figure 7 This is a three-dimensional structural diagram of the insertion rod and the claw of this utility model; Figure 8 This is a schematic diagram of the structure of the wrench plate and shaft of this utility model.

[0010] In the diagram: 1. Horizontal tube; 2. Vertical tube; 3. Folding assembly; 31. Flange; 32. Hinge sleeve; 33. Hinge shaft; 34. Wrench plate; 35. Elliptical collar; 36. U-shaped groove; 37. Protrusion; 38. Shaft; 39. Mounting base; 4. Spring; 5. Sliding sleeve; 6. Insert rod; 7. Ring groove; 8. Limiting ring; 9. Positioning plate; 10. Claw; 11. Convex ball; 12. Push plate; 13. Strip hole. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Please see Figure 1 A folding bicycle frame includes a cross tube 1, a vertical tube 2 fixedly installed at one end of the cross tube 1 for mounting the saddle, a rear fork frame fixedly installed on the side of the vertical tube 2 for mounting the rear wheel, a front fork mounting tube fixedly installed at the other end of the cross tube 1 for mounting the front fork, and a diagonal beam fixedly installed between the cross tube 1 and the vertical tube 2 for strengthening the frame.

[0013] Please see Figure 2-7 A folding assembly 3 is provided at one-third of the position of the horizontal tube 1. The folding assembly 3 includes two symmetrically arranged flanges 31. The sides of the two flanges 31 are movably connected to each other by a hinge sleeve 32 and a hinge rod 33. The other sides of the two flanges 31 are detachably connected by a locking fastener. When the flanges 31 are opened, one flange 31 can rotate around the other flange 31 through the hinge sleeve 32 and the hinge rod 33.

[0014] Please see Figure 8 The locking mechanism includes a wrench plate 34, on the sides of which an elliptical collar 35 and a U-shaped groove 36 are fixedly mounted. A protrusion 37 is fixedly mounted at the middle of the inner wall of the elliptical collar 35, dividing the elliptical collar 35 into a locked position and an unlocked position. A shaft 38 is inserted into both the elliptical collar 35 and the U-shaped groove 36, and the shaft 38 is mounted on the side of the flange 31 via a mounting base 39. When the shaft 38 inside the elliptical collar 35 is in the locked position, the U-shaped groove 36 engages with the other shaft 38. When the shaft 38 inside the elliptical collar 35 is in the unlocked position, the U-shaped groove 36 separates from the other shaft 38.

[0015] Please see Figure 2-7A spring 4 is inserted inside the horizontal tube 1 on the left side. One end of the spring 4 is inserted inside the sliding sleeve 5. A rod 6 is fixedly installed on the side of the sliding sleeve 5. Two annular grooves 7 are opened on the outer side of the rod 6. The end of the rod 6 is spherical.

[0016] Please see Figure 2-7 The top of the sliding sleeve 5 is fixedly installed with a push plate 12 by a support rod, and the top of the horizontal tube 1 on the left side is provided with a strip hole 13 corresponding to the support rod.

[0017] Please see Figure 2-7 A limit ring 8 is fixedly installed at the opening of the right horizontal tube 1. A positioning plate 9 is fixedly installed inside the right horizontal tube 1. Four claws 10 are fixed to the side of the positioning plate 9. The claws 10 are elastic and can be squeezed and deformed when the spherical end of the insertion rod 6 is inserted. A convex ball 11 corresponding to the annular groove 7 is fixedly installed on the inner side of the claws 10. The spring 4 pushes the insertion rod 6 into the interior of the four claws 10, and the convex ball 11 is locked in the interior of the annular groove 7 to lock the insertion rod 6 and ensure that the connection between the two horizontal tubes 1 will not shake.

[0018] Working principle: When in use, after the frame is unfolded, the wrench plate 34 is rotated and pressed on the cross tube 1 and pushed back with force. The U-shaped groove 36 will be fitted onto the axle 38, and the central axle 38 inside the elliptical collar 35 will slide from the unlocked position to the locked position, thereby locking the two sections of the cross tube 1. Afterwards, the spring 4 pushes the insert rod 6 through the limiting ring 8 and inserts it into the four claws 10. The convex ball 11 on the inner side of the claw 10 will be locked in the ring groove 7 to lock the insert rod 6. The sliding sleeve 5 is in the left horizontal tube 1 and the insert rod 6 is in the right horizontal tube 1. After the two horizontal tubes 1 are connected, their joint will not easily shake, thus ensuring that the entire frame will not move loosely due to the locking connection after unfolding, thereby improving the firmness of the connection.

[0019] By applying force to the wrench plate 34 to engage it, the shaft 38 in the elliptical collar 35 slides past the protrusion 37 to the left unlock position of the elliptical collar 35, increasing the space for movement between the U-shaped groove 36 and the shaft 38 on the right, thus making it easier to open the wrench plate 34 by applying force. The sliding sleeve 5 is driven to move backward by the push plate 12, and the insert rod 6 moves backward and leaves the pawl 10. The pawl 10 releases the lock on the insert rod 6, which facilitates the folding of the two horizontal tubes 1. The hinge sleeve 32 and hinge rod 33 have damping force to ensure that the two horizontal tubes 1 will not wobble after folding. This process realizes the folding of the entire frame.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A folding bicycle frame, comprising a horizontal tube (1), a vertical tube (2) fixedly installed at one end of the horizontal tube (1), a rear fork fixedly installed on the side of the vertical tube (2), a front fork mounting tube fixedly installed at the other end of the horizontal tube (1), and a diagonal beam fixedly installed between the horizontal tube (1) and the vertical tube (2), characterized in that: A folding assembly (3) is provided at one-third of the position of the horizontal tube (1). The folding assembly (3) includes two symmetrically arranged flanges (31). The sides of the two flanges (31) are movably connected to each other by a hinge sleeve (32) and a hinge rod (33). The other side of the two flanges (31) is detachably connected by a locking fastener. The locking component includes a wrench plate (34), on the side of which an elliptical collar (35) and a U-shaped groove (36) are fixedly installed respectively. A protrusion (37) is fixedly installed at the middle of the inner wall of the elliptical collar (35). A shaft (38) is inserted inside both the elliptical collar (35) and the U-shaped groove (36). The shaft (38) is installed on the side of the flange (31) through a mounting seat (39).

2. The folding bicycle frame according to claim 1, characterized in that: A spring (4) is inserted inside the horizontal tube (1) on the left side. One end of the spring (4) is inserted inside the sliding sleeve (5). A rod (6) is fixedly installed on the side of the sliding sleeve (5). Two annular grooves (7) are opened on the outer side of the rod (6). The end of the rod (6) is spherical.

3. A folding bicycle frame according to claim 2, characterized in that: A limiting ring (8) is fixedly installed at the opening of the right horizontal tube (1). A positioning plate (9) is fixedly installed inside the right horizontal tube (1). Four claws (10) are fixed on the side of the positioning plate (9). A convex ball (11) corresponding to the ring groove (7) is fixedly installed on the inner side of the claws (10).

4. A folding bicycle frame according to claim 2, characterized in that: The top of the sliding sleeve (5) is fixedly installed with a push plate (12) by a support rod, and the top of the horizontal tube (1) on the left side is provided with a strip hole (13) corresponding to the support rod.

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