A four-bar linkage folding mechanism and a scooter

Abstract

The application provides a four-connecting-rod folding mechanism and a scooter, and relates to the technical field of folding devices, and solves the technical problem of safety hazards caused by the cam locking between the stand pipe and the front fork in the prior art. The four-connecting-rod folding mechanism and the scooter comprise a first seat body and a second seat body which are hingedly connected to be capable of switching between a folding state and an unfolding state; a buckling assembly which comprises an inserting part rotatably arranged on the second seat body, a matching part fixedly arranged on the first seat body, and a trigger structure arranged on the second seat body, the inserting part is matched with the matching part, the trigger structure is connected with the inserting part, and the inserting part is driven to rotate on the second seat body towards the direction of the matching part, so that the inserting part can abut against the matching part. The application is used for providing a four-connecting-rod folding mechanism and a scooter which are higher in safety and more stable in connection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of folding devices, in particular to a four-bar linkage folding mechanism and a scooter. BACKGROUND

[0002] A scooter generally comprises a handlebar assembly (hereinafter referred to as "handlebar"), a stem assembly (hereinafter referred to as "stem"), a front fork assembly (hereinafter referred to as "front fork"), a front wheel assembly, a frame assembly (including a head tube), a rear fork assembly, and a rear wheel assembly. The folding mechanism is commonly arranged between the front fork and the stem or between the head tube and the frame.

[0003] Currently, the folding mechanism arranged between the front fork and the stem on the market is generally implemented by a combination of a triangular structure and a cam. The triangular geometry stability principle is mainly used (the front fork and the stem are connected by a shaft to form a rotating center as a vertex of a triangle, the cam and the front fork are connected by a shaft to form a rotating center as a vertex of a triangle, and the cam and the stem are connected by a buckle to form an opening and closing point of the connection between the front fork and the stem as a vertex of a triangle). The cam compensates for the manufacturing tolerance of the parts. When the stem of the scooter is in an open state (i.e., a state in which it can be ridden), the folding mechanism is closed (mainly in the form of a buckle to connect the front fork and the stem), the cam is manually locked, and the stem, the front fork, and the folding mechanism form a triangular stable structure. When the stem of the scooter needs to be switched to a folded state (i.e., a state in which it can be stored or carried), the cam is manually unlocked, the folding mechanism is opened (the buckle is detached), and the stem and the front fork are only connected by a rotating shaft.

[0004] The present applicant has found that the prior art at least has the following technical problems:

[0005] 1. When the stem is in an open state, the user may sometimes forget to manually lock the cam, resulting in a failure of the locking function. During riding, there is a risk of shaking, disconnection, or breakage between the stem and the front fork, and if the stem and the front fork are disconnected or broken, a situation in which the rider falls may occur.

[0006] 2. Since the parts constituting the folding mechanism are steel parts, the cam is mainly used to compensate for the gap caused by the manufacturing error after assembly, and finally to achieve locking to avoid the problem of shaking during riding. However, the cam will produce a slight deformation to achieve an interference fit in the locked state, and a certain external force is required to lock it, otherwise it will not play a role in preventing loosening.

[0007] 3. When the stem is in an open state, it is achieved by a combination of a buckle, the end surface of the stem and the front fork, and the cam locking. When the product is used for a long time or is assembled for the first time, the tightness of the mechanism needs to be adjusted manually, which requires high quality control of the product. SUMMARY

[0008] The application aims to provide a four-bar linkage folding mechanism and a scooter to solve the technical problem of safety hazard caused by the cam locking between the stand pipe and the front fork in the prior art.

[0009] To achieve the above-mentioned purpose, the application provides the following technical solutions.

[0010] The four-bar linkage folding mechanism provided by the application comprises:

[0011] The first seat body and the second seat body are hingedly connected to switch between the folded state and the unfolded state.

[0012] The buckle assembly comprises a plug-in part rotatably arranged on the second seat body, a matching part fixedly arranged on the first seat body, and a trigger structure arranged on the second seat body, the plug-in part is matched with the matching part, the trigger structure is connected with the plug-in part to drive the plug-in part to rotate on the second seat body towards the matching part, so that the plug-in part can abut against the matching part.

[0013] As a further improvement of the application, the plug-in part comprises a first plug pin and a second plug pin, the first plug pin and the second plug pin are coaxially arranged on both sides of the second seat body through a first connecting rod and a second connecting rod, the matching part comprises a first matching groove and a second matching groove, the first matching groove and the second matching groove are arranged on the first seat body and correspond to the first plug pin and the second plug pin respectively.

[0014] The trigger structure comprises a third connecting rod, a fourth connecting rod and a pull rod, the first end of the third connecting rod and the first end of the fourth connecting rod are rotatably connected with the pull rod, the second end of the third connecting rod and the second end of the fourth connecting rod are rotatably connected with the first connecting rod and the second connecting rod respectively, and pulling the pull rod can drive the first plug pin and the second plug pin to synchronously rotate.

[0015] As a further improvement of the application, a tension spring is arranged between the pull rod and the second seat body, and the elastic force of the tension spring drives the pull rod to move towards the second seat body.

[0016] As a further improvement of the application, a first inclined surface structure is arranged on the top surface of the first plug pin and the second plug pin, a second inclined surface structure is arranged on the first matching groove and the second matching groove, and the first inclined surface structure is matched with the second inclined surface structure.

[0017] As a further improvement of the application, a third inclined surface structure is arranged on the bottom surface of the first plug pin and the second plug pin.

[0018] As a further improvement of the present application, a pull ring is arranged on the pull rod, the pull ring is arranged on the pull rod in a rotating manner, a locking block is arranged on the first seat body, and the locking block cooperates with the pull ring.

[0019] As a further improvement of the present application, a first guide groove and a second guide groove are arranged on the second seat body, and the first bolt and the second bolt are arranged in the first guide groove and the second guide groove in a rotating manner respectively.

[0020] As a further improvement of the present application, a positioning recess is arranged on the first seat body, and a positioning protrusion is arranged on the second seat body, the positioning protrusion cooperates with the positioning recess.

[0021] A scooter comprises a scooter body and the four-bar linkage folding mechanism as described above.

[0022] As a further improvement of the present application, the scooter body comprises a handlebar, a vertical pipe, a front fork, a front wheel, a pedal and a rear wheel, the front wheel is rotatably connected to the front fork, the front fork is connected to the front end of the pedal through a diagonal pull rod, the rear end of the pedal is provided with a rear fork, the rear wheel is rotatably connected to the rear fork, one end of the vertical pipe is connected to the middle part of the handlebar, and the other end of the vertical pipe away from the handlebar is connected to the front fork through the four-bar linkage folding mechanism.

[0023] The four-bar linkage folding mechanism provided by the present application comprises a buckling assembly and hingedly connected first and second seat bodies, the buckling assembly comprises an insertion part, a cooperating part and a trigger structure, the trigger structure can drive the insertion part to rotate on the second seat body in the direction of the cooperating part so as to abut the insertion part on the cooperating part, when the first and second seat bodies are in an unfolded state, the trigger structure can ensure that the cooperation between the insertion part and the cooperating part is in a close cooperation state, thereby avoiding the first and second seat bodies from being separated, and ensuring the safety of driving. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0025] Figure 1 is a perspective view of the present application;

[0026] Figure 2is a splitting diagram of the present application;

[0027] Figure 3 is a folding state diagram of the present application;

[0028] Figure 4 is a front view of the present application;

[0029] Figure 5 is a sectional view of the present application;

[0030] Figure 6 is an explosion diagram of the second seat body of the present application;

[0031] Figure 7 is a structural schematic diagram of the trigger structure of the present application.

[0032] Fig. 1, first seat body; 2, second seat body; 3, buckling assembly; 11, locking block; 12, positioning groove; 21, first guide groove; 22, second guide groove; 23, positioning protrusion; 311, first bolt; 312, second bolt; 313, first connecting rod; 314, second connecting rod; 315, first inclined surface structure; 316, third inclined surface structure; 321, first matching groove; 322, second matching groove; 323, second inclined surface structure; 331, third connecting rod; 332, fourth connecting rod; 333, pull rod; 334, pull spring; 335, pull ring. DETAILED DESCRIPTION

[0033] The content of the present application and the difference between the present application and the prior art can be understood below Figures 1-7 with reference to the accompanying drawings and the text. The technical solutions of the present application (including the preferred technical solutions) are described in further detail below by means of the accompanying drawings and by listing some optional embodiments of the present application. It should be noted that any technical feature or any technical solution in the present embodiment is one or several of a plurality of optional technical features or optional technical solutions. In order to simplify the description, all alternative technical features and alternative technical solutions of the present application cannot be listed in this document, and it is not convenient to emphasize that the implementation mode of each technical feature is one of a plurality of optional implementation modes. Therefore, the person skilled in the art should know that any technical means provided by the present application can be replaced, or any two or more technical means or technical features provided by the present application can be combined to obtain a new technical solution. Any technical feature and any technical solution in the present embodiment do not limit the protection scope of the present application, and the protection scope of the present application should include any alternative technical solution that can be thought of by the person skilled in the art without creative labor, and the new technical solution obtained by the person skilled in the art by combining any two or more technical means or technical features provided by the present application.

[0034] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The present application provides a four-bar linkage folding mechanism and a scooter with higher safety and more stable connection.

[0037] The technical solutions provided by the present application will be described in detail below. Figures 1-7 The technical solutions provided by the present application will be described in detail below.

[0038] The present application provides a four-bar linkage folding mechanism, comprising:

[0039] The first seat body and the second seat body are hingedly connected to be able to switch between a folded state and an unfolded state;

[0040] The buckle assembly comprises a plug-in part rotatably arranged on the second seat body, a matching part fixedly arranged on the first seat body, and a trigger structure arranged on the second seat body, the plug-in part is matched with the matching part, the trigger structure is connected with the plug-in part, and the plug-in part is driven to rotate on the second seat body towards the direction of the matching part, so that the plug-in part can abut against the matching part.

[0041] The four-bar linkage folding mechanism comprises a buckling assembly, a first seat body and a second seat body, the buckling assembly comprises a plug-in part, a matching part and a trigger structure, the trigger structure can drive the plug-in part to rotate on the second seat body to the matching part direction so as to abut the plug-in part on the matching part, when the first seat body and the second seat body are in the unfolded state, the trigger structure can ensure that the cooperation between the plug-in part and the matching part is in the close cooperation state, thereby avoiding the separation of the first seat body and the second seat body and ensuring the safety of driving.

[0042] As a further improvement of the application, the plug-in part comprises a first plug pin and a second plug pin, the first plug pin and the second plug pin are coaxially arranged on both sides of the second seat body through a first connecting rod and a second connecting rod, the matching part comprises a first matching groove and a second matching groove, the first matching groove and the second matching groove are arranged on the first seat body and correspond to the first plug pin and the second plug pin respectively;

[0043] The trigger structure comprises a third connecting rod, a fourth connecting rod and a pull rod, the first end of the third connecting rod and the first end of the fourth connecting rod are rotatably connected with the pull rod, the second end of the third connecting rod and the second end of the fourth connecting rod are rotatably connected with the first connecting rod and the second connecting rod respectively, and pulling the pull rod can drive the first plug pin and the second plug pin to rotate synchronously.

[0044] In this further improvement, the plug-in part comprises a first plug pin and a second plug pin, the matching part comprises a first matching groove and a second matching groove, the first plug pin and the second plug pin are coaxially arranged on both sides of the second seat body through a first connecting rod and a second connecting rod, the trigger structure comprises a third connecting rod, a fourth connecting rod and a pull rod, the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod form a four-bar linkage structure, the pull rod is connected with the four-bar linkage structure and can drive the first plug pin and the second plug pin to move close to or away from each other, thereby meeting the plug-in cooperation connection of the first plug pin and the first matching groove and the second plug pin and the second matching groove, only the pull rod needs to be pulled or pressed, and the locking and unlocking processes can be completed, which is very convenient and fast.

[0045] As a further improvement of the application, a tension spring is arranged between the pull rod and the second seat body, and the elastic force of the tension spring drives the pull rod to move to the second seat body direction.

[0046] In the further improvement, the tension spring is connected with the pull rod, so that the first plug and the second plug are elastically abut on the first matching groove and the second matching groove respectively. The first plug and the first matching groove and the second plug and the second matching groove are always in an elastic extrusion state, so that the stability of the connection is ensured and the shaking problem of the first seat body and the second seat body after the connection is avoided.

[0047] As a further improvement of the present application, a first inclined surface structure is arranged on the top surface of the first plug and the second plug, and a second inclined surface structure is arranged on the first matching groove and the second matching groove, and the first inclined surface structure cooperates with the second inclined surface structure.

[0048] In the further improvement, the first inclined surface structure cooperates with the second inclined surface structure, so that the first plug and the first matching groove and the second plug and the second matching groove are always in an elastic extrusion state, and the first plug and the first matching groove and the second plug and the second matching groove are in inclined surface contact, so that the shaking problem of the first seat body and the second seat body after the connection is further solved. The first plug and the first matching groove and the second plug and the second matching groove are matched by the first inclined surface structure and the second inclined surface structure, so that the assembly gap caused by the manufacturing error can be compensated, and manual tightness adjustment is not required.

[0049] As a further improvement of the present application, a third inclined surface structure is arranged on the bottom surface of the first plug and the second plug.

[0050] In the further improvement, the bottom surface of the first plug and the second plug is provided with a third inclined surface structure, so that when the first seat body and the second seat body are switched from the folded state to the unfolded state, the second seat body rotates relative to the first seat body, the third inclined surface structure of the bottom surface of the first plug and the second plug first contacts the first seat body, then drives the first plug and the second plug to move and compress the tension spring, until the first plug and the second plug are inserted into the first matching groove and the second matching groove, the tension spring resets, and the first plug and the second plug are abutted in the first matching groove and the second matching groove. The locking process does not require manual operation and can be completed by directly driving the second seat body to rotate, which is very convenient and fast.

[0051] As a further improvement of the present application, a pull ring is arranged on the pull rod, the pull ring is rotationally arranged on the pull rod, a locking block is arranged on the first seat body, and the locking block cooperates with the pull ring.

[0052] In the further improvement, the pull ring is arranged on the pull rod and the locking block is arranged on the first seat body, so that after the first plug and the first matching groove and the second plug and the second matching groove are inserted and cooperated, the position of the pull rod is further locked by the cooperation of the pull ring and the locking block.

[0053] As a further improvement of the present application, a first guide slot and a second guide slot are arranged on the second seat body, and the first bolt and the second bolt are respectively arranged in the first guide slot and the second guide slot.

[0054] In the further improvement, the first guide slot and the second guide slot play a guiding role, ensuring the movement accuracy of the first bolt and the second bolt, and ensuring the close fit of the first bolt and the first matching slot and the second bolt and the second matching slot. Meanwhile, arranging the first bolt and the second bolt in the first guide slot and the second guide slot improves the product aesthetics.

[0055] As a further improvement of the present application, a positioning recess is arranged on the first seat body, and a positioning protrusion is arranged on the second seat body, which cooperates with the positioning recess.

[0056] In the further improvement, the arrangement of the positioning recess and the positioning protrusion ensures that the first seat body and the second seat body have high positioning accuracy after being unfolded, ensuring stable connection between them and avoiding shaking.

[0057] A scooter includes a scooter body and the four-bar linkage folding mechanism as described above.

[0058] As a further improvement of the present application, the scooter body includes a handlebar, a vertical pipe, a front fork, a front wheel, a pedal and a rear wheel. The front wheel is rotatably connected to the front fork. The front fork is connected to the front end of the pedal through a diagonal brace. The rear end of the pedal is provided with a rear fork. The rear wheel is rotatably connected to the rear fork. One end of the vertical pipe is connected to the middle part of the handlebar. The end of the vertical pipe away from the handlebar is connected to the front fork through the four-bar linkage folding mechanism.

[0059] Embodiment 1:

[0060] The four-bar linkage folding mechanism provided by the present application includes:

[0061] The first seat body 1 and the second seat body 2 are hingedly connected to be able to switch between a folded state and an unfolded state.

[0062] The buckle assembly 3 includes a plug-in part rotatably arranged on the second seat body 2, a matching part fixedly arranged on the first seat body 1, and a trigger structure arranged on the second seat body 2. The plug-in part cooperates with the matching part. The trigger structure is connected to the plug-in part to drive the plug-in part to rotate on the second seat body 2 towards the direction of the matching part, so that the plug-in part can abut against the matching part.

[0063] It can be understood that when the first seat body 1 and the second seat body 2 are switched from the folded state to the unfolded state, the trigger structure drives the plug-in part to rotate, so that the plug-in part is inserted into the matching part, and the locking process of the first seat body 1 and the second seat body 2 is completed; when the first seat body 1 and the second seat body 2 are switched from the unfolded state to the folded state, the trigger structure drives the plug-in part to rotate, so that the plug-in part is separated from the matching part, and the unlocking and folding process of the first seat body 1 and the second seat body 2 is completed.

[0064] Specifically, the plug-in part includes a first plug pin 311 and a second plug pin 312, which are coaxially arranged on both sides of the second seat body 2 through a first connecting rod 313 and a second connecting rod 314, and the matching part includes a first matching groove 321 and a second matching groove 322, which are arranged on the first seat body 1 and can correspond to the first plug pin 311 and the second plug pin 312, respectively.

[0065] The trigger structure includes a third connecting rod 331, a fourth connecting rod 332 and a pull rod 333, the first end of the third connecting rod 331 and the first end of the fourth connecting rod 332 are rotatably connected with the pull rod 333, the second end of the third connecting rod 331 and the second end of the fourth connecting rod 332 are rotatably connected with the first connecting rod 313 and the second connecting rod 314, respectively, and pulling the pull rod 333 can drive the first plug pin 311 and the second plug pin 312 to rotate synchronously.

[0066] A tension spring 334 is arranged between the pull rod 333 and the second seat body 2, and the elastic force of the tension spring 334 drives the pull rod 333 to move towards the second seat body 2, so that the first plug pin 311 and the second plug pin 312 are elastically abutted on the first matching groove 321 and the second matching groove 322, respectively. The connection stability of the first plug pin 311 and the first matching groove, and the second plug pin 312 and the second matching groove is ensured, and the shaking problem of the first seat body 1 and the second seat body 2 after connection is avoided.

[0067] A pull ring 335 is arranged on the pull rod 333, the pull ring 335 is rotatably arranged on the pull rod 333, a locking block 11 is arranged on the first seat body 1, and the locking block 11 cooperates with the pull ring 335. The pull ring 335 can be buckled on the locking block 11 by rotating the pull ring 335, and the locking is completed.

[0068] Further, first inclined surface structures 315 are arranged on top surfaces of the first and second pins 311 and 312, and second inclined surface structures 323 are arranged on the first and second matching grooves 321 and 322, and the first inclined surface structures 315 are matched with the second inclined surface structures 323. Third inclined surface structures 316 are arranged on bottom surfaces of the first and second pins 311 and 312.

[0069] First and second guide grooves 21 and 22 are arranged on the second seat body 2, and the first and second pins 311 and 312 are respectively arranged in the first and second guide grooves 21 and 22.

[0070] A positioning groove 12 is arranged on the first seat body 1, and a positioning protrusion 23 is arranged on the second seat body 2, and the positioning protrusion 23 is matched with the positioning groove 12.

[0071] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, and all of them should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A four-bar linkage folding mechanism, characterized by, The application relates to a four-link folding mechanism. The four-link folding mechanism comprises a first seat body and a second seat body which can be switched between a folded state and an unfolded state; a buckle assembly which comprises an insertion part rotatably arranged on the second seat body, a matching part fixedly arranged on the first seat body and a trigger structure arranged on the second seat body, the insertion part is matched with the matching part, the trigger structure is connected with the insertion part and drives the insertion part to rotate on the second seat body towards the matching part so that the insertion part can abut against the matching part; the insertion part comprises a first insertion pin and a second insertion pin which are coaxially rotatably arranged on two sides of the second seat body through a first connecting rod and a second connecting rod; the matching part comprises a first matching groove and a second matching groove which are arranged on the first seat body and correspond to the first insertion pin and the second insertion pin respectively; the trigger structure comprises a third connecting rod, a fourth connecting rod and a pull rod, the first end of the third connecting rod and the first end of the fourth connecting rod are rotatably connected with the pull rod, the second end of the third connecting rod and the second end of the fourth connecting rod are rotatably connected with the first connecting rod and the second connecting rod respectively, and pulling the pull rod can drive the first insertion pin and the second insertion pin to synchronously rotate; a positioning groove is arranged on the first seat body and a positioning protrusion is arranged on the second seat body, and the positioning protrusion is matched with the positioning groove. A tension spring is arranged between the pull rod and the second seat body, and the elastic force of the tension spring drives the pull rod to move towards the second seat body. First inclined surface structures are arranged on the top surfaces of the first insertion pin and the second insertion pin, second inclined surface structures are arranged on the first matching groove and the second matching groove, and the first inclined surface structures are matched with the second inclined surface structures. Third inclined surface structures are arranged on the bottom surfaces of the first insertion pin and the second insertion pin. A pull ring is arranged on the pull rod and rotatably arranged on the pull rod, a locking block is arranged on the first seat body and matched with the pull ring.

2. The four-bar linkage folding mechanism of claim 1, wherein, First guide grooves and second guide grooves are arranged on the second seat body, and the first insertion pin and the second insertion pin are rotatably arranged in the first guide grooves and the second guide grooves respectively.

3. The four-bar linkage folding mechanism of claim 1, wherein, The application further relates to a scooter body and the four-link folding mechanism.

4. The four-bar linkage folding mechanism of claim 3, wherein, The scooter body comprises a handlebar, a vertical pipe, a front fork, a front wheel, a pedal and a rear wheel, the front wheel is rotatably connected with the front fork, the front fork is connected with the front end of the pedal through a diagonal pull rod, the rear end of the pedal is provided with a rear fork, the rear wheel is rotatably connected with the rear fork, one end of the vertical pipe is connected with the middle part of the handlebar, and the other end of the vertical pipe away from the handlebar is connected with the front fork through the four-link folding mechanism.

5. The four-bar linkage folding mechanism of claim 1, wherein, ​ 6. The four-bar linkage folding mechanism of claim 1, wherein, ​ 7. Scooter, characterized in that ​ 8. Scooter according to claim 7, characterized in that ​

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