CN111252180A

CN111252180A - Folding frame and folding car

Info

Publication number: CN111252180A
Application number: CN202010205313.6A
Authority: CN
Inventors: 姚立
Original assignee: Dongguan Tailing Vehicle Industry Co ltd
Current assignee: Dongguan Tailing Vehicle Industry Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-06-09

Abstract

The invention discloses a folding frame and a folding bicycle. The folding frame comprises a cross beam, a stand column and a support column; the cross beam comprises a front beam and a rear beam; the bottom of the rear end of the front beam is rotationally connected with the bottom of the front end of the rear beam so that the front beam and the rear beam can be vertically folded and cannot rotate to be folded during riding; one end of the supporting column is rotatably connected with the upright column, the other end of the supporting column is detachably connected with the front beam through the inserting mechanism and is supported below the front beam, and the cross beam, the upright column and the supporting column are triangular, so that the stability of the whole frame can be ensured; the inserting mechanism comprises a pulling piece, a connecting rod and an inserting module, the pulling piece is rotationally connected with the supporting column, two ends of the connecting rod are respectively rotationally connected with the pulling piece and the inserting module, the inserting module is slidably connected with the supporting column along the axial direction of the supporting column, and the pulling piece, the connecting rod and the inserting module form a crank slider mechanism; the acting force is applied to the trip piece, so that the plugging module can slide to realize plugging with the front beam, and the operation is simple and the use is convenient.

Description

Folding frame and folding car

Technical Field

The invention relates to the field of vehicles, in particular to a folding frame and a folding vehicle.

Background

Folding frame among the prior art, the structure after the expansion is firm inadequately, because can produce the vibration at the in-process of riding, fixed knot constructs the easy pine and takes off to bring the potential safety hazard. The folding and unfolding operations are complicated and are not easy to use.

Disclosure of Invention

The invention aims to provide a folding frame and a folding vehicle, which have reliable stability and are simple and convenient to operate.

In order to solve the above technical problem, in one aspect, an embodiment of the present invention provides a foldable frame, which is characterized by including a cross beam, a column and a support column;

the cross beam comprises a front beam and a rear beam, and the bottom of the rear end of the front beam is rotatably connected with the bottom of the front end of the rear beam so as to enable the front beam and the rear beam to be vertically folded; the upright post is fixedly connected with the rear beam;

one end of the supporting column is rotatably connected with the upright column, and the other end of the supporting column is detachably connected with the front beam through an inserting mechanism; the inserting mechanism comprises a pulling piece, a connecting rod and an inserting module, the pulling piece is rotationally connected with the supporting column, two ends of the connecting rod are respectively rotationally connected with the pulling piece and the inserting module, the inserting module is slidably connected with the supporting column along the axial direction of the supporting column, and the pulling piece, the connecting rod and the inserting module form a crank slider mechanism;

when the supporting column is connected with the front beam, the front end of the supporting column abuts against the front beam and is supported below the front beam, the rear end of the front beam abuts against the front end of the rear beam, and the cross beam, the upright post and the supporting column are triangular; the trip piece is positioned at a first position, and the plug-in module is in plug-in fit with the front beam; when the trip piece rotates to a second position relative to the support column, the plug-in module slides in a direction away from the front beam and is separated from the front beam.

The support column is of a hollow structure, and a pulling hole is formed in the support column; the plug-in module is arranged in the inner cavity of the supporting column in a sliding manner; the trip piece is positioned at the trip hole and comprises a trip rod and a rotating handle, two ends of the rotating handle are respectively and rotatably connected with the supporting column and the connecting rod, one end of the trip rod is fixedly connected with the rotating handle, and the trip rod is positioned on the outer side of the supporting column; when the trip piece is located at the first position, the connecting rod and the rotating handle are both located in the inner cavity of the supporting column.

The plug-in module comprises a sliding block and a plug-in rod, and one end of the plug-in rod is fixedly connected with the sliding block;

when the trip piece is positioned at the first position, the other end of the insertion rod extends out of the support column and can be inserted into the front beam;

when the trip piece is located at the second position, the other end of the insertion rod is located in the support column.

The spring is used for applying acting force towards the movement of the support column to the insertion rod.

A guide ring is fixed in the support column, the guide ring and the slide block are arranged at intervals, and the insertion rod penetrates through the guide ring;

the other end of the insertion rod is provided with a connecting cap, the outer diameter of the connecting cap is larger than that of the insertion rod, and the outer diameter of the connecting cap is smaller than the inner diameter of the support column;

the spring comprises a first section of spring and/or a second section of spring; two ends of the first section of spring are respectively connected with the connecting cap and the guide ring, and two ends of the second section of spring are respectively connected with the guide ring and the sliding block; when the connecting cap of the inserting rod is in an extending state, the first section of spring is stretched and deformed, and the second section of spring is compressed and deformed.

Wherein, the other end of the pull rod is provided with a handle ring.

A first rotation axis is formed between the connecting rod and the plugging module, a second rotation axis is formed between the trip piece and the supporting column, and a third rotation axis is formed between the connecting rod and the trip piece; the first rotating axis and the second rotating axis are coplanar to form a rack surface;

when the trip piece is located at the first position, the third rotation axis and the trip piece are respectively located at two sides of the rack surface;

when the trip member rotates to the second position, the third rotation axis passes through the rack surface and then is positioned on the same side of the rack surface as the trip member.

The trip piece is provided with a positioning mechanism for positioning the trip piece at a first position.

The support column is provided with a hooking part, the positioning mechanism comprises a positioning piece and a torsion spring, when the pulling piece is located at the first position, the middle part of the positioning piece is connected with the pulling piece in a rotating mode, one end of the positioning piece is provided with a clamping hook, the other end of the positioning piece is provided with a handle part, the torsion spring is connected between the positioning piece and the pulling piece and used for providing elasticity to enable the clamping hook to be abutted against the hooking part, and when the pulling piece is located at the first position, the clamping hook can be hooked on the hooking part.

In another aspect, the invention provides a folding bicycle, which comprises the folding bicycle frame.

According to the folding frame and the folding bicycle, the front beam and the rear beam are vertically folded, so that the folding bicycle cannot rotate and fold during riding, and has better reliability; the supporting columns are inserted into the front beam through the inserting mechanisms and are supported below the front beam, and the cross beam, the stand column and the supporting columns are triangular, so that the stability of the whole frame can be ensured; the pulling piece, the connecting rod and the inserting module of the inserting mechanism form a crank sliding block mechanism, acting force is applied to the pulling piece, the inserting module can slide to realize inserting with the front beam, and the inserting mechanism is simple to operate and convenient to use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a folding frame in an unfolded state according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the folding frame of FIG. 1 at another angle in an unfolded state;

FIG. 3 is a schematic structural view of the folding frame of FIG. 1 with the support posts separated from the front beam;

FIG. 4 is a schematic structural view of the foldable frame of FIG. 1 in a folded condition;

FIG. 5 is a schematic view of the folding frame of FIG. 4 at another angle in a folded position;

FIG. 6 is a schematic illustration of the docking mechanism of the foldable frame of FIG. 1 in an unfolded state;

fig. 7 is a schematic structural view of the plugging mechanism in fig. 6 in a folded state.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The orientations described in the following embodiments, such as front, rear, left, right, up, down, top, bottom, etc., refer to the orientation of the foldable wagon relative to the user during normal use.

The preferred embodiment of the invention provides a folding bicycle, which can be a folding bicycle or a folding electric bicycle. The foldable vehicle comprises a foldable frame 100, a front wheel and a rear wheel (not shown in the figure), wherein the front wheel and the rear wheel are respectively arranged at the front end and the rear end of the foldable frame 100, and the foldable frame 100 can turn the front wheel downwards and is deviated to one side of the foldable vehicle, so that the front wheel is moved to the position approximately overlapped with the rear wheel, and the space is saved and the foldable vehicle is convenient to store.

Referring to fig. 1 to 5, a foldable frame 100 according to a preferred embodiment of the present invention includes a cross member 1, a pillar 2, and a support pillar 3. The crossbeam 1 comprises a front beam 11 and a rear beam 12, wherein the bottom of the rear end of the front beam 11 is rotatably connected with the bottom of the front end of the rear beam 12 so as to enable the front beam and the rear beam to be vertically folded; the upright post 2 is fixedly connected with the back beam 12; one end of the supporting column 3 is rotatably connected with the upright column, and the other end of the supporting column 3 is detachably connected with the front beam 11 through the inserting mechanism 4.

As shown in fig. 1 and 2, in the unfolded state of the foldable frame, the rear end of the front beam 11 abuts against the front end of the rear beam 12, the overall beam 1 handles the unfolded state, the supporting column 3 is connected with the front beam 11 through a plug-in structure, the supporting column 3 is supported below the front beam 11, and the beam 1, the upright column 2 and the supporting column 3 can be connected to form a stable triangle. When the foldable frame needs to be folded, as shown in fig. 3, the support pillar 3 and the front beam 11 are firstly detached, the support pillar 3 is rotated downwards, and then the front beam 11 is turned downwards, so that the frame can be folded.

The angle between the axis of rotation of the front beam 11 and the central axis of the rear beam 12 is acute. Because the rotation axis between the front beam 11 and the rear beam 12 is not perpendicular to or parallel to the central axis of the rear beam 12, but forms an acute angle, after the front beam 11 rotates relative to the rear beam 12, the central axes of the front beam 11 and the rear beam 12 are coplanar straight lines, as shown in fig. 4 to 5, the front beam 11 can be turned downwards and is inclined to one side of the rear beam 12, so that the front wheels and the rear wheels are overlapped, and the folding of the whole vehicle is realized. Because the front beam 11 and the rear beam 12 are vertically folded, the bicycle cannot rotate and fold during riding, and has better reliability.

As shown in fig. 1 to 3, 6 and 7, the detachable connection between the support column 3 and the front beam 11 is realized by the plugging mechanism 4 provided on the support column 3.

The plugging mechanism 4 includes a trigger 41, a connecting rod 42 and a plugging module 43. The pulling member 41 is rotatably connected with the supporting column 3, two ends of the connecting rod 42 are rotatably connected with the pulling member 41 and the plugging module 43 respectively, the plugging module 43 is slidably connected with the supporting column 3 along the axial direction of the supporting column 3, and the pulling member 41, the connecting rod 42 and the plugging module 43 form a crank slider mechanism. The user makes the trip piece 41 rotate between first position and second position to trip piece 41 application of force, and trip piece 41 drives connecting rod 42 and rotates, and connecting rod 42 further drives grafting module 43 along the axial slip of support column 3, and grafting module 43 slides near front-axle beam 11 can with front-axle beam 11 grafting cooperation, and grafting module 43 keeps away from front-axle beam 11 and slides and can separate with front-axle beam 11.

When the supporting column 3 is connected with the front beam 11, the front end of the supporting column 3 abuts against the front beam 11 and is supported below the front beam 11, the rear end of the front beam 11 abuts against the front end of the rear beam 12, the inserting module 43 slides close to the front beam 11, the inserting module 43 can be matched with the front beam 11 in an inserting mode, the supporting column 3 is fixedly connected with the front beam 11, the cross beam 1, the upright post and the supporting column 3 are triangular, and the pulling piece 41 is located at a first position; when the trip piece 41 rotates to the second position relative to the supporting column 3, the plugging module 43 slides in the direction away from the front beam 11 and is separated from the front beam 11, the supporting column 3 rotates downwards to be separated from the front beam 11, the front beam 11 loses the support of the supporting column 3, at this time, the front beam 11 can turn downwards, and the whole folding frame can be folded.

The supporting column 3 is a hollow structure, and the plug-in module 43 is slidably disposed in an inner cavity of the supporting column 3, so as to facilitate the arrangement of the plug-in module 43. The pulling hole 30 is formed in the supporting column 3, and the pulling piece 41 is located at the pulling hole 30, so that two ends of the pulling piece 41 are located on the inner side and the outer side of the supporting column 3 respectively, and operation is facilitated for a user.

As shown in fig. 6 and 7, the trigger 41 includes a trigger 411 and a rotating handle 412, two ends of the rotating handle 412 are respectively rotatably connected to the supporting column 3 and the connecting rod 42, one end of the trigger 411 is fixedly connected to the rotating handle 412, and the trigger 411 is located outside the supporting column 3; when the trigger 41 is located at the first position, the connecting rod 42 and the rotating handle 412 are both located in the inner cavity of the supporting column 3, so that the movement of the rotating handle 412, the connecting rod 42 and the plugging module can be performed in the inner cavity of the supporting column 3, thereby avoiding the interference of external objects.

The plug-in module 43 comprises a sliding block 431 and a plug-in rod 432, the sliding block 431 is rotatably connected with the connecting rod 42, one end of the plug-in rod 432 is fixedly connected with the sliding block 431, and the other end of the plug-in rod 432 is used for being matched with the front beam 11 in a plug-in mode. When the trip piece 41 is located at the first position, the other end of the insertion rod 432 extends out of the support column 3 and can be inserted into the front beam 11; when the trigger 41 is located at the second position, the other end of the insertion rod 432 is located in the support column 3. The plug-in connection with the front beam 11 can be realized by means of a telescopic movement of the plug-in rod 432 of the plug-in module 43.

In this embodiment, the insertion rod 432 is inserted into the bottom surface of the front beam 11, so as to provide a more stable and warm supporting force for the front beam 11. Of course, in other embodiments, the insertion rod 432 may be inserted to the side of the front beam 11 or other parts of the front beam 11.

In order to facilitate the insertion and engagement between the insertion rod 432 and the front beam 11, the front beam 11 is provided with a positioning tube 111, and the insertion rod 432 is inserted into the positioning tube 111. When the foldable frame is in the unfolded state, the insertion rod 432 is inserted into the positioning tube 111 and the supporting column 3 are coaxially arranged, the positioning tube 111 abuts against the supporting column 3, and the supporting column 3 can provide supporting force for the front beam 11.

The spring 44 is sleeved on the plugging rod 432, and the spring 44 is used for applying a force to the plugging rod 432 to move towards the supporting column 3, so that the other end of the plugging rod 432 can be automatically kept in the supporting column 3. When the spring 44 is in the natural state, the trigger 41 is located at the second position, and the insertion rod 432 is in the retracted state. When the trigger 41 rotates to the second position, the end of the insertion rod 432 extends out of the supporting column 3, so that the shape of the insertion rod 432 is changed to apply a force moving into the supporting column 3, thereby facilitating the detachment operation of the user.

In this embodiment, a guide ring 31 is fixed in the support column 3, the guide ring 31 and the slider 431 are disposed at an interval, and the insertion rod 432 penetrates through the guide ring 31. The guide ring 31 can guide the support column 3 to further ensure the stability of the sliding of the insertion rod 432.

The other end of the plug rod 432 is provided with a connection cap 4320, the outer diameter of the connection cap 4320 is larger than that of the plug rod 432, and the outer diameter of the connection cap 4320 is smaller than the inner diameter of the support column 3, so that the connection cap 4320 is retracted into the support column 3. The insertion of the insertion rod 432 to the front beam 11 is performed by the connection cap 4320. The spring 44 includes a first spring 441 and a second spring 442, wherein both ends of the first spring 441 are respectively connected to the connection cap 4320 and the guide ring 31, and both ends of the second spring 442 are respectively connected to the guide ring 31 and the slider 431. When connection cap 4320 of bayonet rod 432 is in an extended state, first section spring 441 is deformed in tension and second section spring 442 is deformed in compression to provide a retracting force to bayonet rod 432. Here, in other embodiments, the spring 44 may include only the first-stage spring 441 or only the second-stage spring 442.

The first spring 441 and the second spring 442 of the spring 44 may be an integral spring 44, and when the insertion rod 432 is in the retracted state, the connection between the first spring 441 and the second spring 442 is fixed on the guide ring 31. The guide ring 31 includes two guide pieces and a guide tube (not shown), the guide pieces are annular, and the guide pieces are fixed on the inner walls of the two ends of the guide tube. The two guide pieces can be conveniently connected with the spring 44, and the guide tube can be fixedly connected with the plug column through a bolt.

In the above embodiment, the spring 44 can apply a force to the plugging rod 432 to move towards the inside of the supporting column 3, in other embodiments, the spring 44 can also be used to apply a force to the plugging rod 432 to move towards the outside of the supporting column 3, so that the other end of the plugging rod 432 can automatically extend, when the connection cap 4320 of the plugging rod 432 is in the retracted state, the first section spring 441 is compressed and the second section spring 442 is stretched to provide the extending force to the plugging rod 432.

A first rotation axis X is formed between the connecting rod 42 and the plugging module 43, a second rotation axis Y is formed between the trip piece 41 and the supporting column 3, and a third rotation axis Z is formed between the connecting rod 42 and the trip piece 41; the first rotation axis X and the second rotation axis Y are coplanar to form a rack surface XZ. When the trip member 41 is located at the first position, the third rotation axis Z and the trip member 41 are located on two sides of the frame surface XZ, respectively; when the trip member 41 rotates to the second position, the third rotation axis Z passes through the rack surface XZ and is located on the same side of the rack surface XZ as the trip member 41.

When the plugging column and the front beam 11 are in a plugging state, the trip member 41 is located at the first position, and the third rotation axis Z and the trip member 41 are located at two sides of the frame surface XZ respectively, so that when the plugging column retracts and moves automatically, the third rotation axis can move towards a direction away from the trip member 41, the trip member 41 cannot move towards the second position automatically, and the reliability of connection in the plugging state is ensured.

The other end of the lever 411 is provided with a handle ring 4110, the handle ring 4110 is utilized to facilitate the user to apply an acting force to the pulling part 41, and a cup can be inserted into the handle ring 4110, so that the user can conveniently carry the cup when riding.

The support column 3 is provided with a hooking part 32, and the trip piece 41 is provided with a positioning mechanism 5 for positioning the trip piece 41 at a first position. In this embodiment, the positioning mechanism is disposed on the trigger rod of the trigger 41. The positioning mechanism 5 includes a positioning member 51 and a torsion spring 52, when the trip member 41 is located at the first position, the middle portion of the positioning member 51 is rotatably connected to the trip member 41, one end of the positioning member 51 is provided with a hook 511, the other end of the positioning member 51 is provided with a handle portion 512, the torsion spring 52 is connected between the positioning member 51 and the trip member 41, and is configured to provide an elastic force to enable the hook 511 to abut against the hooking portion 32, and when the trip member 41 is located at the first position, the hook 511 can hook the hooking portion 32.

When the foldable frame is unfolded, the supporting column 3 is aligned to the positioning tube 111, the trip member 41 is rotated from the second position to the first position, when the trip member 41 is rotated to the first position, the hook 511 is hooked on the hooking portion 32, so that the trip member 41 is positioned at the first position, and the elastic force of the torsion spring 52 can enable the hook 511 and the hooking portion 32 to be always kept in a hooking state, thereby avoiding the disengagement of the hook 511 and the hooking portion 32. When the foldable frame needs to be folded, the handle part 512 is rotated to rotate the positioning member 51, the hook 511 moves and separates from the hooking part 32, and the trip 41 can rotate to move from the first position to the second position.

In this embodiment, the edge of the pulling hole 30 forms the hooking portion 32, which is simple in structure and easy to implement. Here, in other embodiments, the hooking portion 32 may be formed in another structure that can be matched with the hook 511. The pulling hole 30 is located on the downward surface of the supporting column 3 to prevent foreign matters from entering from the pulling hole 30 and affecting the movement of the mechanism.

The rotating shaft between the supporting column 3 and the upright is perpendicular to the central axis of the back beam 12 and the central axis of the upright 2. The rotation axial direction between the support column 3 and the upright column is the left and right direction, and is parallel to the rotation axial direction of the front wheel and the rear wheel. Here, in other embodiments, the rotation axis direction between the stay and the pillar may be parallel to the vertical plane, and the support pillar 3 may rotate toward the left and right direction of the folding cart.

A connecting piece 21 is fixed on the upright post 2, two clamping pieces 22 are arranged on the connecting piece 21, and the rear post 32 is rotatably connected between the two clamping pieces 22; the foldable frame 100 further comprises a rear wheel support 4, the rear wheel support 4 comprises two cross bars 41, and the two cross bars 41 are respectively fixed on two sides of the upright post 2 and are both fixedly connected with the connecting piece 21.

Through connecting piece 21, can conveniently link together support column 3, stand 2 and horizontal pole 41, strengthen connection structure intensity, guarantee the steadiness of whole frame.

The rear end of the folding frame is provided with a rear wheel frame, and the rear wheels can be arranged between the rear ends of the two cross rods of the rear wheel bracket. The rear wheel support can also include two slashes, and the rear end of two slashes respectively with the rear end fixed connection of two horizontal poles, the front end of two slashes can respectively with the upper end fixed connection of stand to guarantee rear wheel supporting structure's steadiness.

In the above embodiment, the plugging module 43 includes the sliding block 431 and the plugging rod 432, in other embodiments, the plugging module 43 may further include only the plugging rod 432, one end of the plugging rod 432 is directly connected with the connecting rod 42 in a rotating manner, and the other end is plugged and matched with the front beam 11; or the plug-in module 43 comprises a sliding block 431 and a plug-in pipe, the bottom surface of the front beam 11 is provided with a plug-in column, and when the folding frame is in the unfolded state, the plug-in column is plugged into the plug-in pipe to realize the plug-in fit between the plug-in module 43 and the front beam 11; or the plug-in module 43 comprises only the above-mentioned plug-in tube.

In the above embodiment, the positioning mechanism 5 includes the positioning member 51 and the torsion spring 52, and the positioning is realized by the hook of the positioning member 51 cooperating with the supporting column. In another embodiment, the positioning mechanism 5 may be a fastening screw, the fastening screw is inserted into the trip member and is screwed into a threaded hole of the support column, the trip member can be positioned by rotating the fastening screw to be screwed into the threaded hole of the support column, and the positioning of the trip member can be released by rotating the fastening screw to be rotated out of the threaded hole of the support column. As another embodiment, the positioning mechanism 5 may also be a sleeve, the sleeve is disposed on the supporting column of the sleeve and can slide relative to the supporting column, and when the trip member is located at the first position, the sliding sleeve enables the trip member and the supporting column to be sleeved in the sleeve, so that the trip member can be positioned at the first position. There are various positioning mechanisms 5 capable of positioning the trip member in the first position, which are not listed here. The positioning member 51 and the torsion spring 52 in this embodiment have the simplest structure, are convenient to process and manufacture, and are convenient and fast to operate.

The above embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. A folding bicycle frame is characterized by comprising a cross beam, a stand column and a support column;

when the supporting column is connected with the front beam, the front end of the supporting column abuts against the front beam and is supported below the front beam, the rear end of the front beam abuts against the front end of the rear beam, and the cross beam, the upright post and the supporting column are triangular; the trip piece is positioned at a first position, and the plug-in module is in plug-in fit with the front beam;

when the trip piece rotates to a second position relative to the support column, the plug-in module slides in a direction away from the front beam and is separated from the front beam.

2. The folding bicycle frame of claim 1, wherein the support pillar is a hollow structure, and a pulling hole is formed in the support pillar; the plug-in module is arranged in the inner cavity of the supporting column in a sliding manner; the trip piece is positioned at the trip hole and comprises a trip rod and a rotating handle, two ends of the rotating handle are respectively and rotatably connected with the supporting column and the connecting rod, one end of the trip rod is fixedly connected with the rotating handle, and the trip rod is positioned on the outer side of the supporting column; when the trip piece is located at the first position, the connecting rod and the rotating handle are both located in the inner cavity of the supporting column.

3. The folding bicycle frame of claim 2, wherein the plug-in module comprises a sliding block and a plug-in rod, and one end of the plug-in rod is fixedly connected with the sliding block;

4. A folding frame as claimed in claim 3, in which said peg is sleeved with a spring for applying a force to said peg moving towards said support post.

5. The folding bicycle frame of claim 4, wherein a guide ring is fixed in the support column, the guide ring and the slide block are arranged at intervals, and the insertion rod penetrates through the guide ring;

6. A foldable frame as claimed in claim 2, in which the other end of the trigger bar is provided with a handle ring.

7. The folding frame of claim 1, wherein a first axis of rotation is formed between the connecting rod and the plug-in module, a second axis of rotation is formed between the trip member and the support post, and a third axis of rotation is formed between the connecting rod and the trip member; the first rotating axis and the second rotating axis are coplanar to form a rack surface;

8. The folding frame of claim 1, wherein the trigger is provided with a positioning mechanism for positioning the trigger at the first position.

9. The foldable bicycle frame according to claim 8, wherein the supporting post is provided with a hooking portion, the positioning mechanism comprises a positioning element and a torsion spring, when the trip member is located at the first position, the middle portion of the positioning element is rotatably connected with the trip member, one end of the positioning element is provided with a hook, the other end of the positioning element is provided with a handle portion, the torsion spring is connected between the positioning element and the trip member and used for providing elasticity to enable the hook to abut against the hooking portion, and when the trip member is located at the first position, the hook can hook on the hooking portion.

10. A folding cart, comprising a folding cart frame according to any of claims 1 to 9.