Folder and folding frame

Abstract

The utility model belongs to the field of folding bicycle accessories, and relates to a folder which comprises a first mounting plate, a second mounting plate, a connecting plate and a locking structure. The first mounting plate is hinged to the connecting plate through a pin shaft; the second mounting plate is clamped with the connecting plate; the top and the bottom of the connecting plate are each provided with a supporting part and a clamping part, and the supporting parts extend towards the first mounting plate and are used for supporting the first mounting plate; the clamping part extends towards the second mounting plate, the connecting plate is clamped on the connecting plate through the clamping part, and the clamping part is further provided with a fixing pin used for fixing the second mounting plate; and the locking structure is used for locking the first mounting plate and the second mounting plate on the connecting plate. The utility model has the beneficial effects that the connecting plate structure is added, and a supporting and clamping structure is designed on the connecting plate, so that the structure is firmer, and the service life is prolonged. And meanwhile, the installation is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of folding bicycle accessories, and particularly relates to a folding mechanism and a folding frame. Background Technology

[0002] Folding bicycles are becoming increasingly popular due to their significantly reduced length and / or height when folded, making them convenient to carry and transport. Folding bicycles typically fold using a folding mechanism, similar in structure to a hinge. This usually consists of two mounting plates hinged together by a pivot. The two parts to be folded are welded and fixed to these plates. During normal use, the two mounting plates are joined and locked together, achieving the unfolded state. Unlocking allows the two mounting plates to rotate relative to each other, achieving the folded state. Operation is simple. However, this structure is prone to pivot misalignment, resulting in a shorter lifespan. Utility Model Content

[0003] To address the technical problems of existing folding mechanism hinges being prone to misalignment and having a short service life, this application provides a folding mechanism and a folding frame.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a folding device, including a first mounting plate, a second mounting plate, a connecting plate and a locking structure;

[0005] The first mounting plate is hinged to the connecting plate via a pin; the second mounting plate is snapped into the connecting plate.

[0006] The connecting plate is provided with a support portion and a snap-fit ​​portion at both the top and bottom. The support portion extends toward the first mounting plate to support the first mounting plate. The snap-fit ​​portion extends toward the second mounting plate, and the connecting plate is snapped onto the connecting plate through the snap-fit ​​portion. The snap-fit ​​portion is also provided with a fixing pin for fixing the second mounting plate.

[0007] The locking structure is used to lock the first mounting plate and the second mounting plate onto the connecting plate.

[0008] In some embodiments, the support portion includes a first support plate disposed on the top of the connecting plate and a second support plate disposed on the bottom of the connecting plate, wherein the first support plate and the second support plate are provided with through holes for mounting the pin.

[0009] In some embodiments, a first limiting structure is provided at the bottom of the pin; the first limiting structure includes a first pull ring installed at the top of the pin and a first ball installed at the bottom of the pin, a first mounting cavity is provided at the bottom of the pin, the first ball is installed in the first mounting cavity, and a spring is provided in the first mounting cavity, the first ball protruding from the surface of the pin under the support of the spring.

[0010] In some embodiments, the first support plate and the second support plate are provided with a first positioning notch, and the first mounting plate is provided with a first positioning protrusion corresponding to the position of the first positioning notch.

[0011] In some embodiments, the snap-fit ​​portion includes a first snap-fit ​​plate disposed on the top of the connecting plate and a second snap-fit ​​plate disposed on the bottom of the connecting plate, wherein a baffle extends upward from one end of the second snap-fit ​​plate away from the connecting plate.

[0012] In some embodiments, the baffle has a guide surface on the side near the connecting plate, the bottom of the first snap-fit ​​plate is inclined, and the top shape of the second mounting plate matches the inclined surface.

[0013] In some embodiments, a second positioning notch is provided on the baffle and the first snap-fit ​​plate and the baffle, and a second positioning protrusion is provided on the second mounting plate corresponding to the position of the second positioning notch.

[0014] In some embodiments, the fixing pin is provided with a second limiting structure; the second limiting structure includes a second pull ring installed on the top of the fixing pin and a second ball installed on the fixing pin, the fixing pin is provided with a second mounting cavity, the second ball is installed in the second mounting cavity, and a spring is provided in the second mounting cavity. The second ball protrudes from the surface of the fixing pin under the support of the spring, and a limiting through hole for accommodating the second ball is provided on the second mounting plate.

[0015] In some embodiments, the locking structure includes a pivot, a pull rod, and a handle. The pivot is rotatably mounted on the second mounting plate. One end of the pull rod is fixedly mounted on the pivot, and the other end is rotatably connected to the handle. The end of the handle connected to the pull rod is a cam structure. The connecting plate and the second mounting plate are provided with clearance notches corresponding to the position of the pull rod.

[0016] This utility model also provides a folding frame, including the above-mentioned folding device.

[0017] Beneficial effects: This utility model improves upon the traditional folding mechanism consisting of two mounting plates by adding a connecting plate structure and designing support and snap-fit ​​structures on the connecting plate, resulting in a more robust structure and improved service life. It also facilitates installation; when fixing it to the frame, the folding mechanism can be disassembled, with the corresponding components welded and fixed to the frame separately, and then assembled with the connecting plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the folding mechanism of this utility model;

[0019] Figure 2 This is a schematic diagram of the folding device of this utility model from another angle;

[0020] Figure 3 This is a schematic diagram of the second mounting plate structure;

[0021] Figure 4 This is a schematic diagram of the fixed pin structure;

[0022] In the figure: 1. First mounting plate, 11. First positioning protrusion, 2. Connecting plate, 21. Second support plate, 22. First support plate, 23. First snap-fit ​​plate, 231. Inclined surface, 24. Second snap-fit ​​plate, 25. First positioning notch, 26. Baffle, 261. Guide surface, 27. Second positioning notch, 3. Second mounting plate, 31. Second positioning protrusion, 32. Limiting through hole, 33. Clearance notch, 4. Pin, 41. First pull ring, 5. Fixing pin, 51. Second pull ring, 52. Second ball bearing, 61. Rotating shaft, 62. Pull rod, 63. Handle. Detailed Implementation

[0023] The present application will be further described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making creative changes are within the protection scope of the present application.

[0024] like Figure 1 and 2 As shown, a folding device includes a first mounting plate 1, a second mounting plate 3, a connecting plate 2, and a locking structure;

[0025] The first mounting plate 1 is hinged to the connecting plate 2 via a pin 4; the second mounting plate 3 is snapped into the connecting plate 2.

[0026] The connecting plate 2 is provided with a support portion and a snap-fit ​​portion at both the top and bottom. The support portion extends toward the first mounting plate 1 to support the first mounting plate 1. The snap-fit ​​portion extends toward the second mounting plate 3. The connecting plate 2 is snapped onto the connecting plate 2 through the snap-fit ​​portion. The snap-fit ​​portion is also provided with a fixing pin 5 for fixing the second mounting plate 3.

[0027] The locking structure is used to lock the first mounting plate 1 and the second mounting plate 3 onto the connecting plate 2.

[0028] In this design, a connecting plate 2 is used to install the first mounting plate 1 and the second mounting plate 3. The first mounting plate 1 can rotate along the pin 4 on the connecting plate 2, thus achieving a folding function. Simultaneously, the support portion effectively supports the connecting plate 2, distributing the force borne by the pin 4 and effectively preventing the shaft 61 from being misaligned due to excessive stress, thus avoiding a short service life. A snap-fit ​​portion is used to snap the second mounting plate 3 onto the connecting plate 2, facilitating installation. The fixing pin 5 prevents the second mounting plate 3 from shifting or misaligning on the connecting plate 2, ensuring the effectiveness and stability of the snap-fit. After the first mounting plate 1 and the second mounting plate 3 are locked onto the connecting plate 2 using a locking structure, the first mounting plate 1 can no longer rotate, ensuring the vehicle can drive normally.

[0029] like Figure 1 and 2 As shown, specifically, to facilitate the installation and fixing of the first mounting plate 1, in some embodiments, the support portion includes a first support plate 22 disposed at the top of the connecting plate 2 and a second support plate 21 disposed at the bottom of the connecting plate 2. The first support plate 22 and the second support plate 21 are provided with through holes for mounting the pin 4. The pin 4 passes through the through holes on the first support plate 22 and the second support plate 21, as well as the first mounting plate 1. The upper and lower ends of the first mounting plate 1 contact the first support plate 22 and the second support plate 21, respectively. When the first mounting plate 1 is subjected to force, the first support plate 22 and the second support plate 21 can provide effective support.

[0030] like Figure 1 and 2 As shown, to prevent the pin 4 from slipping out, in one embodiment, a first limiting structure is provided at the bottom of the pin 4. The first limiting structure includes a first pull ring 41 installed at the top of the pin 4 and a first ball bearing installed at the bottom of the pin 4. A first mounting cavity is provided at the bottom of the pin 4, and the first ball bearing is installed in the first mounting cavity. A spring is provided in the first mounting cavity, and the first ball bearing protrudes from the surface of the pin 4 under the support of the spring (not shown in the figure). The diameter of the first pull ring 41 is larger than the diameter of the through hole, which not only facilitates the operation of the pin 4 during installation and disassembly, but also prevents the pin 4 from slipping downwards. After installation, the first ball bearing is stuck at the bottom of the second support plate 21, preventing the pin 4 from moving upwards. Pressing the first ball bearing or pulling the pin 4 with force can press the first ball bearing into the first mounting cavity, and the pin 4 can be pulled out of the through hole, making installation and disassembly very convenient.

[0031] like Figure 1 and 2As shown, to facilitate the installation of the first mounting plate 1, in some embodiments, the first support plate 22 and the second support plate 21 are provided with a first positioning notch 25, and the first mounting plate 1 is provided with a first positioning protrusion 11 corresponding to the position of the first positioning notch 25. During installation, the first positioning protrusion 11 on the mounting plate is positioned into the first positioning notch 25, thereby aligning the through holes on the first support plate 22 and the second support plate 21 with the hole on the first mounting plate 1 for the pin 4 to pass through, thus achieving positioning and facilitating the installation of the pin 4. At the same time, this structure also avoids lateral movement of the first mounting plate 1 relative to the connecting plate 2, dispersing the lateral force generated on the pin 4.

[0032] like Figure 1 and 2 As shown, specifically, the locking part includes a first locking plate 23 disposed on the top of the connecting plate 2 and a second locking plate 24 disposed on the bottom of the connecting plate 2. A baffle 26 extends upward from the end of the second locking plate 24 away from the connecting plate 2. The baffle 26, the second locking plate 24, the connecting plate 2, and the first locking plate 23 together form a locking cavity for locking the second mounting plate 3, facilitating the locking connection between the second mounting plate 3 and the connecting plate 2. Simultaneously, the first locking plate 23 and the second locking plate 24 also provide support for the second mounting plate 3, preventing excessive stress on the fixing pin 5 and improving the service life of the folding device.

[0033] like Figure 1 and 2 As shown, to facilitate the snap-fit ​​installation of the second mounting plate 3, in some embodiments, the baffle 26 has a guide surface 261 on the side near the connecting plate 2, the bottom of the first snap-fit ​​plate 23 is a slope 231, and the top shape of the second mounting plate 3 matches the slope 231. During installation, the second mounting plate 3 can be inserted into the snap-fit ​​cavity at an inclined angle, and its bottom can slide down along the guide surface 261 of the baffle 26 onto the second snap-fit ​​plate 24, which is more in line with operating habits. Then, the second mounting plate 3 is straightened, and its top can cooperate with the slope 231 at the bottom of the first snap-fit ​​plate 23. After the fixing pin 5 passes through the first snap-fit ​​plate 23 and cooperates with the second mounting plate 3, the second mounting plate 3 can be fixed on the connecting plate 2, which facilitates installation and is simple to assemble.

[0034] like Figure 1 and 3As shown, to further position the second mounting plate 3, in some embodiments, a second positioning notch 27 is provided on the baffle 26 and the first snap-fit ​​plate 23 and baffle 26, and a second positioning protrusion 31 is provided on the second mounting plate 3 corresponding to the position of the second positioning notch 27. As shown in the figure, the second positioning notch 27 on the baffle 26 can be set to an inverted triangular shape, which can not only play a positioning role, but also a guiding role. At the same time, the surface of the second connecting plate 2 can be set to be flush with the surface of the baffle 26, and its bottom can be thinned to fit into the gap between the baffle 26 and the connecting plate 2, so that the upper thickness of the second mounting plate 3 is increased, improving the stress resistance.

[0035] like Figure 4 As shown, specifically, to prevent the fixing pin 5 from detaching, in some embodiments, the fixing pin 5 is provided with a second limiting structure; the second limiting structure includes a second pull ring 51 installed on the top of the fixing pin 5 and a second ball bearing 52 installed on the fixing pin 5. The fixing pin 5 is provided with a second mounting cavity, the second ball bearing 52 is installed in the second mounting cavity, and a spring is provided in the second mounting cavity. The second ball bearing 52 protrudes from the surface of the fixing pin 5 under the support of the spring. The second mounting plate 3 is provided with a limiting through hole 32 for accommodating the second ball bearing 52. The working principle of the second ball bearing 52 is the same as that of the first ball bearing. The difference is that the bottom of the fixing pin 5 may not penetrate the second mounting plate 3. The limiting through hole 32 is provided to limit the movement of the second ball bearing 52 of the fixing pin 5, and also to facilitate observation of whether the fixing pin 5 is installed in place.

[0036] like Figure 1 and 2 As shown, specifically, in some embodiments, the locking structure includes a rotating shaft 61, a pull rod 62, and a handle 63. The rotating shaft 61 is rotatably mounted on the second mounting plate 3. One end of the pull rod 62 is fixedly mounted on the rotating shaft 61, and the other end is rotatably connected to the handle 63. The end of the handle 63 connected to the pull rod 62 has a cam structure. The connecting plate 2 and the second mounting plate 3 have clearance notches 33 corresponding to the position of the pull rod 62. The locking structure can be set on the side of the second mounting plate 3 opposite to the pin 4. By rotating the pull rod 62 into the clearance notch 33 of the connecting plate 2 and the second mounting plate 3, the handle 63 is located outside the second mounting plate 3. Since the handle 63 has a cam structure, rotating the handle 63 can tighten the pull rod 62, so that the first mounting plate 1, the connecting plate 2, and the second mounting plate 3 are locked together. When folding is required, simply turn the handle 63 in the opposite direction to release the pull rod 62, and then rotate the pivot 61 to disengage the pull rod 62 from the clearance notch 33. The first mounting plate 1 and the connecting plate 2 can then rotate freely along the pin 4 to achieve the folding function.

[0037] This utility model also provides a folding bicycle frame with the aforementioned folding device, dividing the frame into two foldable parts. One part is welded and fixed to the first mounting plate 1, and the other part is welded to the second mounting plate 3, thus realizing the folding function of the frame. Specifically, the aforementioned folding device can be used for bicycle frames.

[0038] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this application.

Claims

1. A folding device, characterized in that, It includes a first mounting plate (1), a second mounting plate (3), a connecting plate (2), and a locking structure; The first mounting plate (1) is hinged to the connecting plate (2) via a pin (4); the second mounting plate (3) is snapped into the connecting plate (2); The connecting plate (2) is provided with a support part and a snap-fit ​​part at the top and bottom. The support part extends toward the first mounting plate (1) and is used to support the first mounting plate (1). The snap-fit ​​part extends toward the second mounting plate (3). The connecting plate (2) is snapped onto the connecting plate (2) through the snap-fit ​​part. The snap-fit ​​part is also provided with a fixing pin (5) for fixing the second mounting plate (3). The locking structure is used to lock the first mounting plate (1) and the second mounting plate (3) onto the connecting plate (2).

2. The folding device according to claim 1, characterized in that, The support portion includes a first support plate (22) disposed on the top of the connecting plate (2) and a second support plate (21) disposed on the bottom of the connecting plate (2). The first support plate (22) and the second support plate (21) are provided with through holes for mounting the pin (4).

3. The folding device according to claim 2, characterized in that, The bottom of the pin (4) is provided with a first limiting structure; the first limiting structure includes a first pull ring (41) installed on the top of the pin (4) and a first ball installed on the bottom of the pin (4). The bottom of the pin (4) is provided with a first mounting cavity. The first ball is installed in the first mounting cavity, and a spring is provided in the first mounting cavity. The first ball protrudes from the surface of the pin (4) under the support of the spring.

4. The folding device according to claim 2, characterized in that, The first support plate (22) and the second support plate (21) are provided with a first positioning notch (25), and the first mounting plate (1) is provided with a first positioning protrusion (11) corresponding to the first positioning notch (25).

5. The folding device according to claim 1, characterized in that, The snap-fit ​​part includes a first snap-fit ​​plate (23) disposed on the top of the connecting plate (2) and a second snap-fit ​​plate (24) disposed on the bottom of the connecting plate (2), wherein a baffle (26) extends upward from the end of the second snap-fit ​​plate (24) away from the connecting plate (2).

6. The folding device according to claim 5, characterized in that, The baffle (26) has a guide surface (261) on the side near the connecting plate (2), the bottom of the first snap-fit ​​plate (23) is a slope (231), and the top shape of the second mounting plate (3) matches the slope (231).

7. The folding device according to claim 5 or 6, characterized in that, The baffle (26) and the first snap-fit ​​plate (23) and the baffle (26) are provided with a second positioning notch (27), and the second mounting plate (3) is provided with a second positioning protrusion (31) corresponding to the position of the second positioning notch (27).

8. The folding device according to claim 1, 6, or 7, characterized in that, The fixing pin (5) is provided with a second limiting structure; the second limiting structure includes a second pull ring (51) installed on the top of the fixing pin (5) and a second ball (52) installed on the fixing pin (5). The fixing pin (5) is provided with a second mounting cavity. The second ball (52) is installed in the second mounting cavity, and a spring is provided in the second mounting cavity. The second ball (52) protrudes from the surface of the fixing pin (5) under the support of the spring. The second mounting plate (3) is provided with a limiting through hole (32) for accommodating the second ball (52).

9. The folding device according to claim 1, characterized in that, The locking structure includes a rotating shaft (61), a pull rod (62), and a handle (63). The rotating shaft (61) is rotatably mounted on the second mounting plate (3). One end of the pull rod (62) is fixedly mounted on the rotating shaft (61), and the other end is rotatably connected to the handle (63). The end of the handle (63) connected to the pull rod (62) is a cam structure. The connecting plate (2) and the second mounting plate (3) are provided with clearance notches (33) corresponding to the position of the pull rod (62).

10. A folding bicycle frame, characterized in that, Includes the folding device as described in any one of claims 1 to 9.

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