CN116573091A

CN116573091A - Four-bar linkage folding mechanism and scooter

Info

Publication number: CN116573091A
Application number: CN202310629538.8A
Authority: CN
Inventors: 李利锁; 蒋建国; 石崇阳
Original assignee: Yingfandi (beijing) Science And Technology Ltd
Current assignee: Yingfandi (beijing) Science And Technology Ltd
Priority date: 2023-05-30
Filing date: 2023-05-30
Publication date: 2023-08-11

Abstract

The application provides a four-bar folding mechanism and a scooter, relates to the technical field of folding devices, and solves the technical problem that in the prior art, safety hidden danger exists due to the fact that a cam is adopted to lock a vertical tube and a front fork. The four-bar folding mechanism and the scooter comprise a first seat body and a second seat body which are hinged, so that a folding state and an unfolding state can be switched; the buckling component comprises a plug-in part which is rotationally arranged on the second seat body, a matching part which is fixedly arranged on the first seat body and a triggering structure which is arranged on the second seat body, wherein the plug-in part is matched with the matching part, and the triggering structure is connected with the plug-in part and is used for driving the plug-in part to rotate towards the direction of the matching part on the second seat body so that the plug-in part can be abutted against the matching part. The application is used for providing a four-bar folding mechanism with higher safety and more stable connection and a scooter.

Description

Four-bar linkage folding mechanism and scooter

Technical Field

The application relates to the technical field of folding devices, in particular to a four-bar folding mechanism and a scooter.

Background

Scooter generally comprises a transverse handle assembly (hereinafter referred to as a handle), a vertical pipe assembly (hereinafter referred to as a vertical pipe), a front fork assembly (hereinafter referred to as a front fork), a front wheel assembly, a frame (including a head pipe) assembly, a rear fork assembly and a rear wheel assembly, wherein the common setting positions of the folding mechanism are between the front fork and the vertical pipe and between the head pipe and the frame.

The folding mechanism arranged between the front fork and the vertical pipe in the market at present is generally realized by adopting a combination of a triangle structure and a cam, mainly applying the principle of triangle geometric stability (the front fork and the vertical pipe are connected through a shaft to form a triangle vertex A with a rotation center, the cam and the front fork are connected through a shaft to form a triangle vertex B with a rotation center, the cam and the vertical pipe are connected through a buckle to form a triangle vertex C with a opening point of the front fork and the vertical pipe, and the cam is used for compensating the manufacturing tolerance of parts. When the scooter stand pipe is in an open state (i.e. a state capable of riding), the folding mechanism is closed (mainly connecting the front fork and the stand pipe in a buckle mode), the cam is manually locked, and the stand pipe, the front fork and the folding mechanism form a triangular stable structure. When the scooter stand pipe is required to be switched to a folding state (namely a state capable of being stored or carried), the cam is manually unlocked, the folding mechanism is opened (the buckle is disengaged), and the stand pipe and the front fork are connected only through the rotating shaft.

The present inventors found that there are at least the following technical problems in the prior art:

1. when the riser is in an open state, the user sometimes forgets to manually lock the cam, resulting in the locking function being disabled. The stand pipe and the front fork have risks of shaking, disengaging, breaking and the like in the riding process, and if the stand pipe and the front fork are disengaged or broken, the situation of falling people can be caused.

2. Because the parts forming the folding mechanism are all made of steel, the cam is mainly used for compensating the gap generated after assembly caused by manufacturing errors, and finally locking is realized to avoid the problem of shaking in the riding process. The cam can generate tiny deformation to achieve interference fit under the locking state, and a certain external force is needed to lock the cam, otherwise, the cam cannot play a role in locking.

3. When the vertical pipe is in an open state, the vertical pipe is realized by means of buckling, end face lamination of the vertical pipe and a front fork and cam locking combination, and when the vertical pipe is used for a long time or is assembled for the first time on a product line, the tightness degree of the mechanism needs to be manually adjusted, so that the requirement on quality control of products is high.

Disclosure of Invention

The application aims to provide a four-bar folding mechanism and a scooter, which are used for solving the technical problems that in the prior art, cam locking is adopted between a vertical tube and a front fork, and potential safety hazards exist _。 The preferred technical solutions of the technical solutions provided by the present application can produce a plurality of technical effects described below.

In order to achieve the above purpose, the present application provides the following technical solutions:

the four-bar folding mechanism provided by the application comprises:

the first seat body and the second seat body are hinged so as to be capable of switching between a folded state and an unfolded state;

the buckling assembly comprises a plug-in part arranged on the second seat body in a rotating mode, a matching part fixedly arranged on the first seat body and a triggering structure arranged on the second seat body, wherein the plug-in part is matched with the matching part, and the triggering structure is connected with the plug-in part and used for driving the plug-in part to rotate on the second seat body towards the direction of the matching part so that the plug-in part can be abutted against the matching part.

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 and rotatably arranged at 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, and the first matching groove and the second matching groove are arranged on the first seat body and respectively correspond to the first plug pin and the second plug pin;

the trigger structure comprises a third connecting rod, a fourth connecting rod and a pull rod, wherein the first end of the third connecting rod and the first end of the fourth connecting rod are both connected with the pull rod in a rotating mode, the second end of the third connecting rod and the second end of the fourth connecting rod are respectively connected with the first connecting rod and the second connecting rod in a rotating mode, and the first bolt and the second bolt can be driven to rotate synchronously by pulling the pull rod.

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.

As a further improvement of the application, the top surfaces of the first bolt and the second bolt are respectively provided with a first inclined surface structure, the first matching groove and the second matching groove are respectively provided with a second inclined surface structure, and the first inclined surface structure is matched with the second inclined surface structure.

As a further improvement of the application, a third bevel structure is arranged on the bottom surfaces of the first bolt and the second bolt.

As a further improvement of the application, a pull ring is arranged on the pull rod, the pull ring is rotatably arranged on the pull rod, a locking block is arranged on the first seat body, and the locking block is matched with the pull ring.

As a further improvement of the 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 respectively arranged in the first guide groove and the second guide groove in a rotating way.

As a further improvement of the application, a positioning groove is arranged on the first seat body, a positioning protrusion is arranged on the second seat body, and the positioning protrusion is matched with the positioning groove.

A scooter comprises a scooter body and the four-bar folding mechanism.

As a further improvement of the present application, the scooter body includes: the front wheel is connected to the front fork through a diagonal rod, the front fork is connected with the front end of the pedal, the rear fork is mounted at the rear end of the pedal, the rear wheel is connected to the rear fork in a rotating mode, one end of the vertical pipe is connected with the middle of the handlebar, and one end of the vertical pipe, far away from the handlebar, is connected with the front fork through a four-bar folding mechanism.

The beneficial effects of the application are as follows: the four-bar folding mechanism comprises a buckling assembly, a first base body and a second base body, wherein the first base body and the second base body are hinged, the buckling assembly comprises a plug-in portion, a matching portion and a triggering structure, the triggering structure can drive the plug-in portion to rotate towards the direction of the matching portion on the second base body so as to tightly prop the plug-in portion on the matching portion, when the first base body and the second base body are in an unfolding state, the triggering structure can ensure that the matching between the plug-in portion and the matching portion is in a tight matching state, and therefore the first base body and the second base body are prevented from being separated, and driving safety is ensured. When the first seat body and the second seat body are switched from the unfolding state to the folding state, the trigger structure drives the plug-in connection part to rotate, so that the plug-in connection part and the matching part can be separated, and the folding process of the first seat body and the second seat body is completed.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of the present application;

FIG. 2 is a split view of the present application;

FIG. 3 is a folded state diagram of the present application;

FIG. 4 is a front view of the present application;

FIG. 5 is a cross-sectional view of the present application;

FIG. 6 is an exploded view of a second housing of the present application;

fig. 7 is a schematic structural view of the trigger structure of the present application.

In the figure, 1, a first base; 2. a second seat body; 3. a buckling component; 11. a locking block; 12. a positioning groove; 21. a first guide groove; 22. a second guide groove; 23. positioning the bulge; 31. a plug-in part; 32. a mating portion; 33. a trigger structure; 311. a first latch; 312. a second latch; 313. a first link; 314. a second link; 315. a first ramp structure; 316. a third bevel structure; 321. a first mating groove; 322. a second mating groove; 323. a second ramp structure; 331. a third link; 332. a fourth link; 333. a pull rod; 334. a tension spring; 335. and (5) a pull ring.

Detailed Description

The following description of the application and the differences between the application and the prior art will be understood with reference to the accompanying figures 1-7 and the text. The following describes the application in further detail, including preferred embodiments, by way of the accompanying drawings and by way of examples of some alternative embodiments of the application. It should be noted that: any technical feature and any technical solution in this embodiment are one or several of various optional technical features or optional technical solutions, and in order to describe brevity, all of the optional technical features and the optional technical solutions of the present application cannot be exhausted in this document, and it is inconvenient for an implementation of each technical feature to emphasize that it is one of various optional implementations, so those skilled in the art should know: any one of the technical means provided by the application can be replaced or any two or more of the technical means or technical features provided by the application can be mutually combined to obtain a new technical scheme. Any technical features and any technical solutions 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 conceived by a person skilled in the art without performing creative efforts, and a new technical solution obtained by combining any two or more technical means or technical features provided by the present application with each other by a person skilled in the art.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", etc., refer to an orientation or positional relationship based on that shown in the drawings, and are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.

The application provides a four-bar folding mechanism and a scooter which are higher in safety and more stable in connection.

The technical scheme provided by the application is described in more detail below with reference to fig. 1 to 7.

The application provides a four-bar folding mechanism, comprising:

The four-bar folding mechanism comprises a buckling assembly, a first base body and a second base body, wherein the first base body and the second base body are hinged, the buckling assembly comprises a plug-in portion, a matching portion and a triggering structure, the triggering structure can drive the plug-in portion to rotate towards the direction of the matching portion on the second base body so as to tightly prop the plug-in portion on the matching portion, when the first base body and the second base body are in an unfolding state, the triggering structure can ensure that the matching between the plug-in portion and the matching portion is in a tight matching state, and therefore the first base body and the second base body are prevented from being separated, and driving safety is ensured. When the first seat body and the second seat body are switched from the unfolding state to the folding state, the trigger structure drives the plug-in connection part to rotate, so that the plug-in connection part and the matching part can be separated, and the folding process of the first seat body and the second seat body is completed.

In this further improvement, grafting portion includes first bolt and second bolt, the cooperation portion includes first cooperation groove and second cooperation groove, first bolt and second bolt pass through first connecting rod and the coaxial rotation setting of second connecting rod in second pedestal both sides, trigger the structure and include third connecting rod, fourth connecting rod and pull rod, first connecting rod, the second connecting rod, third connecting rod and fourth connecting rod form four-bar linkage, the pull rod is connected with four-bar linkage, can drive first bolt and second bolt and be close to each other or keep away from each other, thereby satisfy that first bolt and first cooperation groove, second bolt and second cooperation groove's grafting cooperation are connected, only need pulling or press the pull rod, can accomplish locking and unblock process, the operation is very convenient and fast.

In this further development, the tension spring is connected to the tension rod such that the first pin and the second pin are respectively resiliently held against the first mating groove and the second mating groove. Ensure that first bolt and first cooperation groove, second bolt and second cooperation groove are in the elasticity extrusion state always, guarantee its connection stability, avoid appearing rocking the problem after first pedestal and the second pedestal are connected.

In this further improvement, first inclined plane structure cooperatees with the second inclined plane structure, further ensures that first bolt and first cooperation groove, second bolt and second cooperation groove are in the elasticity extrusion state always, and is the inclined plane contact between first bolt and first cooperation groove, second bolt and the second cooperation groove, laminates completely through the inclined plane, has further solved the rocking problem after first pedestal and the second pedestal connection. And the first bolt adopts first inclined plane structure and second inclined plane structure cooperation with first cooperation groove, second bolt and second cooperation groove can compensate the fit-up gap that manufacturing error produced, need not the debugging of manual work elasticity.

In this further improvement, the bottom surfaces of first bolt and the second bolt all are provided with the third inclined plane structure for when first pedestal and second pedestal switch to the expansion state from folding state, the second pedestal rotates, and the third inclined plane structure of first bolt and second bolt bottom surface contacts first pedestal earlier, then can drive first bolt and second bolt and remove compression extension spring, until first bolt with the second bolt inserts first cooperation inslot and second cooperation inslot, and the extension spring resets, with first bolt with second bolt butt in first cooperation inslot and second cooperation inslot. The locking process can be completed by directly driving the second seat body to rotate without manual operation, and is very convenient and quick.

In this further improvement, through being provided with the pull ring on the pull rod, be provided with the locking piece on first pedestal, after first bolt and first cooperation groove, second bolt and second cooperation groove grafting cooperation are accomplished, through pull ring and locking piece cooperation, the position of further locking pull rod.

In the further improvement, the first guide groove and the second guide groove are arranged, so that the first guide groove and the second guide groove play a guide role, the moving precision of the first bolt and the second bolt is ensured, and the tight fit of the first bolt and the first fit groove and the tight fit of the second bolt and the second fit groove are ensured; simultaneously, set up first bolt and second bolt in first guide way and second guide way, improve product aesthetic property.

In this further improvement, through the setting of positioning groove and location arch, ensure that first pedestal and second pedestal possess higher positioning accuracy after expanding, ensure to connect between the two stably, avoid rocking.

A scooter comprises a scooter body and the four-bar folding mechanism.

Example 1:

the four-bar folding mechanism provided by the application comprises:

a first seat 1 and a second seat 2 hinged to each other so as to be able to switch between a folded state and an unfolded state;

the buckling component 3 comprises a plug-in portion 31 rotatably arranged on the second seat body 2, a matching portion 32 fixedly arranged on the first seat body 1 and a triggering structure 33 arranged on the second seat body 2, wherein the plug-in portion 31 is matched with the matching portion 32, and the triggering structure 33 is connected with the plug-in portion 31 and used for driving the plug-in portion 31 to rotate on the second seat body 2 towards the direction of the matching portion 32 so that the plug-in portion 31 can be abutted against the matching portion 32.

It can be understood that when the first seat 1 and the second seat 2 are switched from the folded state to the unfolded state, the trigger structure 33 drives the plug portion 31 to rotate, so that the plug portion 31 can be inserted into the mating portion 32, and the locking process of the first seat 1 and the second seat 2 is completed; when the first seat 1 and the second seat 2 are switched from the unfolded state to the folded state, the triggering structure 33 drives the plug-in portion 31 to rotate, so that the plug-in portion 31 and the matching portion 32 can be separated, and the unlocking and folding processes of the first seat 1 and the second seat 2 are completed.

Specifically, the plugging portion 31 includes a first plug 311 and a second plug 312, the first plug 311 and the second plug 312 are coaxially rotatably disposed on both sides of the second base 2 by a first link 313 and a second link 314, the mating portion 32 includes a first mating groove 321 and a second mating groove 322, and the first mating groove 321 and the second mating groove 322 are disposed on the first base 1 and can respectively correspond to the first plug 311 and the second plug 312;

the triggering structure 33 includes a third link 331, a fourth link 332, and a pull rod 333, where a first end of the third link 331 and a first end of the fourth link 332 are both rotatably connected to the pull rod 333, and a second end of the third link 331 and a second end of the fourth link 332 are respectively rotatably connected to the first link 313 and the second link 314, and pulling the pull rod 333 can drive the first latch 311 and the second latch 312 to rotate synchronously.

A tension spring 334 is disposed between the tension rod 333 and the second seat 2, and the tension force of the tension spring 334 drives the tension rod 333 to move toward the second seat 2. So that the first latch 311 and the second latch 312 are elastically abutted against the first fitting groove 321 and the second fitting groove 322, respectively. The connection stability of the first bolt 311 and the first matching groove and the connection stability of the second bolt 312 and the second matching groove are ensured, and the shaking problem after the first seat body 1 and the second seat body 2 are connected is avoided.

A pull ring 335 is provided on the pull rod 333, the pull ring 335 is rotatably provided on the pull rod 333, a locking block 11 is provided on the first seat 1, and the locking block 11 is matched with the pull ring 335. The pull ring 335 is turned, and the pull ring 335 can be buckled on the locking block 11 to complete locking.

Further, a first inclined surface structure 315 is disposed on the top surfaces of the first latch 311 and the second latch 312, a second inclined surface structure 323 is disposed on the first matching groove 321 and the second matching groove 322, and the first inclined surface structure 315 is matched with the second inclined surface structure 323. A third inclined surface structure 316 is provided on the bottom surfaces of the first pin 311 and the second pin 312.

The second seat 2 is provided with a first guide groove 21 and a second guide groove 22, and the first latch 311 and the second latch 312 are respectively rotatably disposed in the first guide groove 21 and the second guide groove 22.

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

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A four-bar linkage folding mechanism, comprising:

2. The four-bar folding mechanism according to claim 1, wherein the plug-in portion includes a first plug pin and a second plug pin, the first plug pin and the second plug pin are coaxially rotatably disposed on both sides of the second seat body through a first link and a second link, the mating portion includes a first mating groove and a second mating groove, and the first mating groove and the second mating groove are disposed on the first seat body and respectively correspond to the first plug pin and the second plug pin;

3. The four-bar linkage folding mechanism according to claim 2, wherein a tension spring is provided between the tension rod and the second seat body, and the tension force of the tension spring drives the tension rod to move toward the second seat body.

4. The four bar linkage folding mechanism according to claim 2, wherein a first ramp structure is provided on top of each of the first and second pins, and a second ramp structure is provided on each of the first and second mating grooves, the first ramp structure mating with the second ramp structure.

5. The four bar linkage folding mechanism according to claim 4, wherein a third ramp structure is provided on a bottom surface of each of the first and second latches.

6. The four-bar linkage folding mechanism according to claim 2, wherein a pull ring is provided on the pull rod, the pull ring is rotatably provided on the pull rod, and a locking block is provided on the first base, and the locking block is matched with the pull ring.

7. The four-bar linkage folding mechanism according to claim 2, wherein a first guide groove and a second guide groove are provided on the second base, and the first latch and the second latch are rotatably provided in the first guide groove and the second guide groove, respectively.

8. The four-bar linkage folding mechanism according to claim 1, wherein a positioning groove is provided on the first base, and a positioning protrusion is provided on the second base, the positioning protrusion being engaged with the positioning groove.

9. A scooter comprising a scooter body and a four-bar folding mechanism as claimed in any one of claims 1 to 8.

10. The scooter of claim 9, wherein the scooter body comprises: the front wheel is connected to the front fork through a diagonal rod, the front fork is connected with the front end of the pedal, the rear fork is mounted at the rear end of the pedal, the rear wheel is connected to the rear fork in a rotating mode, one end of the vertical pipe is connected with the middle of the handlebar, and one end of the vertical pipe, far away from the handlebar, is connected with the front fork through a four-bar folding mechanism.