TW201604067A - Folding drive structure of folding bicycle - Google Patents

Abstract

The invention discloses a folding drive structure of a folding bicycle. The folding bicycle comprises a front frame and a rear frame, wherein the middle of the front frame and the front end of the rear frame are in pivoted connection to form a first pivot point. The folding drive structure of the folding bicycle comprises an electric pusher, a middle axle, drive parts and pushing parts, wherein the rear end of the electric pusher is pivoted to the rear frame, and the output end of the electric pusher is pivoted to the middle axle; the front end of each drive part and the front end of the rear frame are in pivoted connection to form a second pivot point, a clamping groove is formed in the middle of each drive part, and end parts of the middle axle are clamped into the clamping grooves; the front end of each pushing part and a transverse bar at the rear end of the front frame are in pivoted connection to form a third pivot point, and the rear ends of the pushing parts and the rear ends of the drive parts are in pivoted connection to form fourth pivoted points. The folding bicycle can be unfolded or folded automatically and completely, is very easy to use, and greatly facilitates operation of a user.

Description

Folding drive structure of folding bike

The present invention relates to a folding cart, and more particularly to a folding drive structure that enables a folding cart to be automatically folded.

With the improvement of people's living standards, the concept of personality, fashion, health and environmental protection has begun to gain popularity. Fashionable and environmentally-friendly daily necessities and transportation vehicles are being sought after by more and more people. Electric vehicles are also a simple means of transportation. Developed into a symbol of fashion and healthy lifestyle, it is also one of the environmentally friendly ways to save energy. The foldable electric vehicle that saves storage space and is easy to carry is small in size and light in weight, and it is carried up and down the stairs and up and down the elevator. It is very convenient to travel by bus and subway.

The folding structure of the conventional folding electric vehicle is generally manually folded, although the user can realize the folding by simple operation, and the use is also very simple; however, for people who are inconvenient to move, manual folding also requires more costly. Great strength, therefore, the form of manual folding to some extent inconvenience to those who are inconvenient or physically disabled.

Based on the above deficiencies, there is a need for a folding drive structure that enables the folding cart to be automatically folded.

It is an object of the present invention to provide a folding drive structure that enables a folding cart to be automatically folded.

In order to achieve the above object, the folding cart provided by the present invention comprises a front frame and a rear frame, the rear section of the front frame and the front section of the rear frame are respectively overlapped up and down, and the middle part of the front frame is The front end of the rear frame is pivotally connected to form a first pivoting point, and the folding driving structure of the folding vehicle comprises an electric push rod, a middle shaft, a driving member and a pushing member, and a rear end of the electric push rod is pivotally connected to the In the rear frame, the output end of the electric push rod is pivotally connected to the middle shaft; the front end of the driving member is pivotally connected with the front end of the rear frame to form a second pivot point, and the middle portion of the driving member is Card a slot, the end of the middle shaft is engaged with the card slot; a front end of the pushing member is pivotally connected with a crossbar of the rear end of the front frame to form a third pivot point, and a rear end of the pushing member Forming a fourth pivot point with the rear end of the driving member; forming a quadrilateral between the first pivot point, the second pivot point, the third pivot point, and the fourth pivot point, the electric An output end of the push rod extends to push the middle shaft, and the middle shaft top pushes the driving member to relatively fold the front frame and the rear frame by the deformation of the quadrilateral.

Compared with the prior art, the present invention pivotally connects the front end of the driving member to the front end of the rear frame, and the front end of the pushing member is pivotally connected to the cross bar of the rear end of the front frame, and a rear end of the pushing member is pivotally connected to a rear end of the driving member such that the second, third, and fourth pivoting points are respectively formed, and the middle portion and the rear portion of the front frame are The first pivotal point formed by the front end of the frame is formed into a quadrilateral shape, so that the rotation of the driving member can be pushed by the expansion and contraction of the electric push rod, thereby deforming the entire quadrilateral, and finally the front frame is rotated to achieve a pair. The front frame and the rear frame are folded; during the whole process, only the electric push rod needs to be opened to extend or contract, so that the folding vehicle can be fully deployed or folded completely, and the use is very simple. Great user convenience.

Preferably, the card slot is an arcuate open slot formed in a lower edge of the middle portion of the driving member.

Specifically, the folding drive structure of the folding cart further includes a linkage, the linkage is pivotally connected to the driving member, the linkage has a hook, and the hook is fastened in a direction to block the opening slot. The end of the central axis. Providing a hook on the linkage, the hook may position an end of the central shaft in the open slot, thereby avoiding disengaging the central shaft from the open slot when the electric push rod is retracted And pushing the hook through the middle shaft top to drive the driving member downward through the linkage to realize automatic deployment.

More specifically, the folding drive structure of the folding cart further includes a locking hook, a middle portion of the locking hook is pivotally connected to a rear end of the front frame, and an inner side of the rear frame protrudes from a locking shaft, A hook body at a lower end of the locking hook is fastened to the locking shaft. The locking hook is locked with the locking shaft to lock the front frame and the rear frame in an unfolded state, thereby preventing the front frame and the rear frame from being accidentally folded.

More specifically, one side of the locking hook is bent to extend out of the top, and the end of the hook correspondingly extends out of the abutting column; the rear end of the pushing member is provided with an elongated hole, the driving a rear end of the piece is provided with a pivot pin, the shaft pin is rotatably and slidably inserted into the elongated hole, and when the driving member is actuated, the locking hook is driven to be disengaged by the abutting column on the linking member The locking shaft.

More specifically, a first tensile member that engages the hook body with the locking shaft is provided between an upper end of the locking hook and an inner side of the front frame. With the first tensile element, the locking hook can be automatically snapped onto the locking shaft to prevent the locking hook from accidentally coming off the locking shaft, thereby making the folding vehicle more secure when deployed.

More specifically, the upper end of the locking hook is provided with a limiting portion for preventing the first tensile element from being excessively contracted, and the limiting portion abuts against the side of the crossbar.

More specifically, the front end of the linkage extends downwardly from the pushing portion, and the pushing portion is provided with a second tensile member between the rear frame and the front frame. The second tensile element can hold the hook in abutment to the end of the central shaft, thereby effectively preventing the central shaft from disengaging from the open slot.

More specifically, the rear end of the linkage extends obliquely upward to a manually operable operating portion. The operation portion is provided, and the linkage portion and the second tensile member are combined to manually operate the linkage member, thereby driving the driving member to perform manual folding of the folding vehicle.

Preferably, the folding drive structure of the folding vehicle includes at least one support rod, one end of the support rod is pivotally connected to the driving member on the lower side of the second pivot point, and the support rod is further One end is sleeved on the central axis. By providing the support rod, the strength of the center shaft can be increased to prevent the central shaft from being bent and deformed.

100‧‧‧Fold drive structure

200‧‧‧ front frame

300‧‧‧ rear frame

400‧‧‧Front wheel bracket

500‧‧‧ Rear wheel bracket

600‧‧‧Folding seat

1‧‧‧Electric putter

2‧‧‧ center axis

201‧‧‧cross bar

3‧‧‧ Drives

301‧‧‧Locking shaft

31‧‧‧Open slot

32‧‧‧ axle pin

4‧‧‧ linkages

41‧‧‧ hook

42‧‧‧Promotion Department

43‧‧‧Operation Department

44‧‧‧Rocking column

5‧‧‧Lock hook

51‧‧‧Looks

52‧‧‧ arrive at the top

53‧‧‧Limited Department

6‧‧‧Pushing pieces

61‧‧‧Long hole

7‧‧‧Second tensile element

8‧‧‧First tensile element

9‧‧‧Support rod

A‧‧‧first pivot point

b‧‧‧Second pivot point

C‧‧‧third pivot point

D‧‧‧fourth pivot point

E‧‧‧ fifth pivot point

F‧‧‧ sixth pivot point

1 is a schematic structural view of a folding bicycle of the present invention when unfolded; FIG. 2 is a schematic structural view of another angle when the folding bicycle of the present invention is deployed; FIG. 3 is an enlarged view of a portion A of FIG. 2; FIG. 5 is a schematic exploded view of the folding drive structure of the folding bicycle of the present invention; FIG. 6 is a schematic structural view of the driving member in the folding drive structure of the folding bicycle of the present invention; FIG. It is a schematic structural view of a linkage in the folding drive structure of the folding bicycle of the present invention; Figure 8 is a schematic view showing the structure of the locking hook in the folding drive structure of the folding bicycle of the present invention; and Figure 9 is a schematic view showing the state of the components when the folding drive structure of the folding bicycle of the present invention is folded.

The detailed description of the technical contents, structural features, and effects achieved by the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the folding bicycle of the present invention includes a front frame 200 and a rear frame 300. The rear section of the front frame 200 and the front section of the rear frame 300 are respectively overlapped up and down, and the front frame is overlapped. The middle portion of the 200 is pivotally connected to the front end of the rear frame 300 to form a first pivot point a. The front end of the front frame 200 is pivotally connected to the front wheel bracket 400, and the rear end of the rear frame 300 is fixed to the rear wheel bracket 500. The folding drive structure 100 of the folding cart is disposed between the front frame 200 and the rear frame 300, and the folding seat 600 of the folding cart is disposed on the rear frame 300.

Referring to FIGS. 3 to 6 , the folding drive structure 100 of the folding vehicle includes an electric push rod 1 , a middle shaft 2 , two driving members 3 , two linkage members 4 , two locking hooks 5 and two pushing members 6 . The driving member 3, the linkage member 4, the locking hook 5 and the pushing member 6 are respectively symmetrically disposed between the front frame 200 and the rear frame 300 on both sides of the folding cart, and are respectively composed of the electric push rod 1 and the center shaft 2 The rear end of the electric push rod 1 is pivotally connected to the rear frame 300, and the output end of the electric push rod 1 is pivotally connected to the central shaft 2; the electric push rod 1 is inclined, and the direction is inclined obliquely upward along the extending direction of the output end. The purpose is to effectively push the center shaft 2 to rise when the output end of the electric push rod 1 is extended; the front end of the driving member 3 is pivotally connected with the front end of the rear frame 300 to form a second pivot point b, and the middle portion of the driving member 3 is provided. There is a card slot, and the card slot is an arcuate open slot 31 which is opened at the lower edge of the middle portion of the driving member 3. The end of the center shaft 2 is locked in the opening slot 31; the front end of the pushing member 6 is pivotally connected with the cross bar 201 at the rear end of the front frame 200 to form a third pivot point c, and the cross bar 201 of the front frame 200 laterally spans before The rear end of the pusher member 6 is pivotally connected to the rear end of the driving member 3 to form a fourth pivot point d; the first pivot point a, the second pivot point b, and the third pivot point A quadrilateral is formed between c and the fourth pivot point d, the output end of the electric push rod 1 extends out of the push shaft 2, and the middle shaft 2 pushes the driving member 3 to utilize the deformation of the quadrilateral to make the front frame 200 and the rear frame 300 relatively Closed.

Referring to FIG. 4, FIG. 5 and FIG. 7, the linkage member 4 is pivotally connected to the driving member 3 to form a fifth pivot point e. The linkage member 4 has a hook 41, and the hook 41 is fastened in the direction of blocking the opening slot 31. The end of the center shaft 2. By providing the hook 41 on the link member 4, the hook 41 can position the end of the center shaft 2 in the open slot 31, thereby avoiding the center shaft when the electric push rod 1 is contracted. 2, the opening slot 31 is disengaged, and the hook 41 is pushed by the top of the center shaft 2 to drive the driving member 3 downward by the linkage 4 to realize automatic deployment. The front end of the link member 4 extends downwardly from the pushing portion 42, and the second stretching member 7 is disposed between the pushing portion 42 and the rear frame 300 in front thereof. The second tensile member 7 can hold the hook 41 to the end of the center shaft 2, thereby effectively preventing the center shaft 2 from coming off the opening groove 31. The rear end of the link member 4 extends obliquely upward to the manually operable operation portion 43, and the operation portions of the two linkage members 4 are connected by a link. The operation portion 43 is provided, and in combination with the pushing portion 42 and the second tensile member 7, the linkage 4 can be manually operated manually, thereby driving the driving member 3 to realize the manual folding of the folding vehicle.

Referring to FIG. 4, FIG. 5 and FIG. 8 , the middle of the locking hook 5 is pivotally connected to the rear end of the front frame 200 to form a sixth pivot point f, and the inner side of the rear frame 300 protrudes from the locking shaft 301. The hook body 51 of the lower end of the locking hook 5 is engaged with the lock shaft 301. The locking of the locking hook 5 with the locking shaft 301 can lock the front frame 200 and the rear frame 300 in an unfolded state, thereby preventing the front frame 200 and the rear frame 300 from being accidentally folded. One end of the locking hook 5 is bent to extend out of the top portion 52. The end portion of the hook 41 extends correspondingly to the top pillar 44. The rear end of the pushing member 6 is provided with an elongated hole 61. The rear end of the driving member 3 is provided with a rear end. The shaft pin 32 and the shaft pin 32 are rotatably and slidably inserted into the elongated hole 61. When the driving member 3 is actuated, the locking hook 5 is disengaged from the locking shaft 301 by the abutting column 44 on the linkage member 4. Further, the pushing member 6 is disposed obliquely along the rear lower side in order to prevent the pushing member 6 from rotating upward against the cross bar 201 during the process of the locking hook 5 being disengaged from the locking shaft 301, resulting in a phenomenon in which the folding is jammed. A first tensile member 8 for engaging the hook body 51 to the lock shaft 301 is provided between the upper end of the locking hook 5 and the inner side of the front frame 200. With the first tensile element 8, the locking hook 5 can be automatically snapped onto the locking shaft 301, preventing the locking hook 5 from accidentally disengaging from the locking shaft 301, thereby making the folding cart more secure when deployed. The upper end of the locking hook 5 is provided with a limiting portion 53 for preventing the first tensile element 8 from being excessively contracted, and the limiting portion 53 abuts against the side surface of the cross bar 201.

Referring to FIG. 4 , the folding drive structure 100 of the folding vehicle includes at least one support rod 9 , one end of the support rod 9 is pivotally connected to the driving member 3 on the lower side of the second pivot point b, and the support rod 9 is further One end is sleeved on the middle shaft 2. By providing the support rod 9, the strength of the center shaft 2 can be increased, and the center shaft 2 can be prevented from being bent and deformed.

In combination with the above and in conjunction with FIG. 9, the working principle of the folding bicycle of the present invention will be described in detail as follows: when the folding vehicle is deployed, the front frame 200 is parallel to the rear frame 300, and the front frame 200 is The rear section overlaps with the rear section of the rear frame 300. At this time, the hook body 51 of the locking hook 5 is fastened to the locking shaft 301, and the front frame 200 and the rear frame 300 cannot be folded relative to the first pivot point a. 32 is located at the rear end of the elongated hole 61. When the folding cart needs to be automatically folded, the electric push rod 1 is activated, the output end of the electric push rod 1 is extended, and the center shaft 2 is pushed up. The end of the middle shaft 2 pushes the driving member 3 in the open slot 31, and the driving member 3 surrounds. The second pivot point b rotates upward; the driving member 3 drives the linkage member 4 to rotate upward. At the beginning, the abutting post 44 of the linkage member 4 pushes against the top portion 52, thereby rotating the locking hook 5 away from the locking shaft 301. The front frame 200 and the rear frame 300 are unlocked. In this process, the pushing member 6 rotates slightly around the third pivot point c, and the shaft pin 32 slides from the rear end of the elongated hole 61 to the front end. At the same time, the front frame 200 and the rear frame 300 do not undergo relative folding. When the electric push rod 1 continues to extend, the driving member 3 continues to rotate and drives the pushing member 6 to rotate upward, and the pushing member 6 drives the front frame 200 to rotate about the first pivot point a, so that the front frame 200 is opposite to the rear. The frame 300 is folded until the front frame 200 and the rear frame 300 are close together, that is, completely folded. When it is necessary to open, only the electric push rod 1 needs to be contracted, and the hook 41 of the linkage 4 is pushed through the middle shaft 2, so that the driving member 3 is driven to rotate downward by the linkage member 4, and the respective components are reversed when folded. Returning to the original position, the front frame 200 is opened relative to the rear frame 300. Finally, the front frame 200 and the rear frame 300 are parallel to each other, and the locking hook 5 is automatically engaged with the locking shaft by the first tensile element 8. On the 301, the folding bike can be fully deployed.

Compared with the prior art, the present invention pivotally connects the front end of the driving member 3 to the front end of the rear frame 300, and pivots the front end of the pushing member 6 to the cross bar 201 at the rear end of the front frame 200, and pushes the same. The rear end of the member 6 is pivotally connected to the rear end of the driving member 3 so as to form the second, third, and fourth pivoting points b, c, and d, respectively, and with the middle and rear frames of the front frame 200. The first pivot point a formed by pivoting the front end of the 300 constitutes a quadrilateral, so that the expansion and contraction of the electric push rod 1 can be used to push the driving member 3 to rotate, thereby deforming the entire quadrilateral, and finally rotating the front frame 200 to achieve the front. The frame 200 and the rear frame 300 are folded; and, by providing the locking hook 5, an abutting top 52 is disposed on the locking hook 5, and an abutting column 44 that cooperates with the abutting top 52 is disposed on the linking member 4, and is at the top The pusher 6 is provided with an elongated hole 61, so that the rear end of the driving member 3 is slidably inserted into the elongated hole 61 through the shaft pin 32, so that the driving member 3 first drives the locking hook 5 at the beginning of the rotation, facing the front The frame 200 and the rear frame 300 are unlocked, so that the folding car is safer when used, and does not hinder the folding; Procedure, only need to open the electric putter 1, extend or shrink it, you can achieve folding or fully extended automatically folded, very simple to use, very easy for the user to operate.

The structure and working principle of the electric push rod 1 involved in the folding drive structure 100 of the folding bicycle of the present invention are well known to those skilled in the art and will not be described in detail herein.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made by the scope of the present invention remain within the scope of the present invention.

200‧‧‧ front frame

300‧‧‧ rear frame

2‧‧‧ center axis

201‧‧‧cross bar

3‧‧‧ Drives

301‧‧‧Locking shaft

31‧‧‧Open slot

32‧‧‧ axle pin

4‧‧‧ linkages

41‧‧‧ hook

5‧‧‧Lock hook

6‧‧‧Pushing pieces

61‧‧‧Long hole

7‧‧‧Second tensile element

A‧‧‧first pivot point

b‧‧‧Second pivot point

C‧‧‧third pivot point

D‧‧‧fourth pivot point

E‧‧‧ fifth pivot point

Claims (10)

A folding drive structure of a folding vehicle, the folding vehicle comprising a front frame and a rear frame, wherein a rear section of the front frame overlaps a front section of the rear frame respectively, and a middle portion of the front frame Forming a first pivotal point with the front end of the rear frame, wherein the folding drive structure of the folding vehicle comprises an electric push rod, a middle shaft, a driving member and a pushing member, and the rear of the electric push rod The end of the electric push rod is pivotally connected to the middle axle; the front end of the driving member is pivotally connected with the front end of the rear frame to form a second pivoting point, a card slot is formed in a middle portion of the driving member, and an end of the center shaft is engaged with the card slot; a front end of the pushing member is pivotally connected with a cross bar at a rear end of the front frame to form a third pivoting point. The rear end of the pushing member is pivotally connected with the rear end of the driving member to form a fourth pivoting point; the first pivoting point, the second pivoting point, the third pivoting point, and the fourth pivoting point Forming a quadrangle, the output end of the electric push rod extending to push the middle shaft, the middle shaft top pushing the driving member to utilize the The polygonal deformation of the front frame and the rear frame relative folded. The folding drive structure of the folding vehicle of claim 1, wherein the card slot is an arcuate open slot formed in a lower edge of the middle portion of the driving member. The folding drive structure of the folding vehicle according to the second aspect of the invention, wherein the folding drive structure of the folding vehicle further comprises a linkage, the linkage is pivotally connected to the driving member, and the linkage has a hook The hook is fastened to the end of the central shaft in a direction to close the open slot. The folding drive structure of the folding vehicle of claim 3, wherein the folding drive structure of the folding vehicle further includes a locking hook, and a middle portion of the locking hook is pivotally connected to a rear end of the front frame. The inner side of the rear frame protrudes from the locking shaft, and the hook body at the lower end of the locking hook is fastened to the locking shaft. The folding drive structure of the folding vehicle of claim 4, wherein one side of the locking hook is bent to extend out of the top, and the end of the hook extends correspondingly to the top pillar; The rear end of the pushing member is provided with an elongated hole, and the rear end of the driving member is provided with a shaft pin, and the shaft pin is rotatably and slidably inserted into the elongated hole, and the driving member passes through the moving body The abutment column on the linkage drives the locking hook out of the locking shaft. The folding drive structure of the folding bicycle according to claim 5, wherein an upper end of the locking hook is disposed between the upper end of the locking hook and the inner side of the front frame, and the hook body is fastened to the locking shaft. The first tensile element. The folding drive structure of the folding bicycle according to claim 6, wherein the upper end of the locking hook is provided with a limiting portion for preventing the first tensile element from excessively contracting, and the limiting portion is abutted against The side of the crossbar. The folding drive structure of the folding vehicle of claim 3, wherein the front end of the linkage extends downwardly from the pushing portion, and the pushing portion is provided with a second portion between the rear frame and the rear frame Stretching element. The folding drive structure of the folding bicycle of claim 8, wherein the rear end of the linkage extends obliquely upward to a manually operable operation portion. The folding drive structure of the folding vehicle of claim 1, wherein the folding drive structure of the folding vehicle comprises at least one support rod, one end of the support rod is pivotally connected to the second pivot point On the driving member on the lower side, the other end of the support rod is sleeved on the central axis.