CN219904428U - Foldable frame - Google Patents

Abstract

The utility model relates to the technical field of frames, in particular to a foldable frame, which comprises two opposite vertical frames, wherein rollers are arranged at the bottoms of the vertical frames, two sides of the two vertical frames are respectively connected through two telescopic components, the telescopic components are of a scissor type connecting rod structure and comprise at least two scissor units which are sequentially connected, the scissor units are in an X shape, a first hinge point is formed in the middle of each scissor unit, and two ends of each telescopic component are respectively connected with the two vertical frames to form a second hinge point and a third hinge point on each vertical frame, wherein the second hinge point is positioned on the upper side of the third hinge point; in the shearing fork unit adjacent to the vertical frame, the part of the shearing fork unit between the first hinging point and the third hinging point can stretch and retract relative to the first hinging point; after the folding bicycle frame is folded, the whole height is smaller, so that the packaging size of the folded bicycle frame in the height direction is smaller, and meanwhile, the folding bicycle frame is also beneficial to transportation and storage.

Description

Foldable frame

Technical Field

The utility model relates to the technical field of frames, in particular to a foldable frame.

Background

The trolley is widely used in daily life, and the traditional trolley frame generally cannot be folded, so that the trolley is inconvenient to carry when going out, and along with the development of technology, a plurality of frames capable of realizing flat folding are appeared in the related technology.

The existing folding frame mainly comprises two vertical frames which are connected through a telescopic connecting rod structure, when the folding frame is folded, the two vertical frames are mutually closed, and the connecting rod structure starts to shrink, so that the frame is folded in a flat state; conversely, when the frame needs to be unfolded, the two uprights are unfolded in the direction away from each other, and the connecting rod structure starts to be unfolded along with the two uprights, so that the frame is unfolded; for such a folding chassis, an integral foldable tool car is disclosed with specific reference to patent document publication No. CN 202071860U.

Although the folding frame can realize the folding function, the folding frame still has the defects in practical application, for example, the frame is contracted in the folding process, the middle top position of the connecting rod structure (namely the upper connecting point for connecting the two cross rods in the patent document) can be lifted upwards in the contraction process of the connecting rod structure, so that the top position of the connecting rod structure is higher than the vertical frame after the frame is completely folded, the whole height of the folded frame is correspondingly increased, the packaging size of the folded frame in the height direction is increased, and the folding frame is also unfavorable for transportation and carrying.

Disclosure of Invention

In order to solve at least one technical problem mentioned in the background art, an object of the present utility model is to provide a foldable frame.

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

the foldable frame comprises two opposite vertical frames, wherein rollers are arranged at the bottoms of the vertical frames, two sides of the two vertical frames are respectively connected through two telescopic assemblies, the telescopic assemblies can be telescopic along the opposite directions of the two vertical frames, the lower parts of the two vertical frames are connected through foldable supporting frames, and the supporting frames act to drive the two vertical frames to be folded or unfolded; the telescopic component is of a scissor type connecting rod structure and comprises at least two scissor units which are sequentially connected, the scissor units are in an X shape, a first hinge point is formed in the middle of each scissor unit, two ends of the telescopic component are respectively connected with two vertical frames, so that a second hinge point and a third hinge point are formed on each vertical frame, and the second hinge point is located on the upper side of the third hinge point; and in the shearing fork unit adjacent to the vertical frame, the part of the shearing fork unit between the first hinging point and the third hinging point can stretch and retract relative to the first hinging point.

Compared with the prior art, the scheme has the advantages that:

in the scheme, an X-shaped shear fork unit is adopted to form a telescopic assembly, and the part, between a first hinging point and a third hinging point, of the shear fork units adjacent to the vertical frame can be telescopic relative to the first hinging point; so, in the frame folding process, the part between first hinge point and third hinge point in the fork unit of cutting adjacent with the grudging post can shrink to make first hinge point can move down in folding process, guarantee like this that the frame is under final folding condition, the middle part summit position of flexible subassembly (cut fork connecting rod structure promptly) can not upwards stretch out the grudging post, thereby make the frame highly can not increase after folding, and then just also make the packing size in the direction of height of the frame after folding less, be favorable to transportation and storage.

Preferably, the scissor unit adjacent to the vertical frame comprises a positioning rod and a telescopic rod, wherein the positioning rod and the telescopic rod are arranged in an X-shaped cross manner, and one end of the positioning rod is hinged with the vertical frame to form the second hinge point; the telescopic rod comprises a fixed rod and an inclined sliding rod which can axially and relatively slide, wherein the fixed rod is hinged with the middle part of the positioning rod to form a first hinge point, and one end of the inclined sliding rod, which is far away from the fixed rod, is hinged with the vertical frame to form a third hinge point.

Preferably, the fixing rod is hinged with the middle part of the positioning rod through a hinge shaft, a sliding groove penetrating through the inclined sliding rod is formed in the inclined sliding rod, the sliding groove extends along the length direction of the inclined sliding rod, and the hinge shaft penetrates through the sliding groove.

Preferably, the fixing rod is internally provided with a channel extending along the length direction of the fixing rod, and the inclined sliding rod is movably arranged in the channel in a penetrating way.

Preferably, a positioning sleeve is arranged in the opening part of the channel of the fixed rod, and the inclined slide rod is arranged in the positioning sleeve in a sliding way.

Preferably, the positioning sleeve is provided with a positioning hole which penetrates through, and the hinge shaft penetrates through the positioning hole.

Preferably, the telescopic assembly comprises two shearing fork units, and the two shearing fork units are respectively connected with the two vertical frames; one ends of two positioning rods in the two scissors fork units are hinged, and the other ends of the two positioning rods are respectively hinged with the two vertical frames to form the second hinge point; one ends of the two telescopic rods are hinged, and the other ends of the two telescopic rods are respectively hinged with the two vertical frames to form a third hinge point; in the same scissors unit, the positioning rod is hinged with the fixed rod of the telescopic rod to form the first hinge point.

Preferably, the support frame comprises two underframes, the two underframes are respectively connected to the two uprights in a rotating way, the lower parts of one ends of the two underframes, which are far away from the uprights, are hinged, and one ends of the two underframes, which are hinged, are propped against each other in the unfolded state of the frame.

Preferably, when the frame is in an unfolding state, the upper sides of one ends, which are abutted against the two underframes, of the frame form an included angle alpha, wherein the included angle alpha is more than 180 degrees and less than or equal to 190 degrees.

Preferably, the two underframes are fixedly connected with engaging pieces at the ends far away from the vertical frame, and the lower parts of the end sides of the two engaging pieces are hinged.

Additional advantages and effects of the utility model are set forth in the detailed description and drawings.

Drawings

FIG. 1 is a schematic view of the structure of the present utility model in an unfolded state;

FIG. 2 is a front view of the present utility model in an expanded state;

FIG. 3 is a schematic view of the present utility model in a folded configuration;

FIG. 4 is a schematic view of the structure of the present utility model in a folded state;

FIG. 5 is a partial cross-sectional view of the telescoping rod of the present utility model;

FIG. 6 is a schematic view of the structure of the positioning sleeve;

FIG. 7 is a schematic structural view of a support frame;

fig. 8 is a schematic view of a partial state of the support frame in the unfolded state according to the present utility model.

Fig. 9 is a schematic view of the structure of the engaging piece.

Detailed Description

The technical solutions of the embodiments of the present utility model will be explained and illustrated below with reference to the drawings of the embodiments of the present utility model, but the following embodiments are only preferred embodiments of the present utility model, and not all embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present utility model.

In the following description, directional or positional relationships such as the terms "inner", "outer", "upper", "lower", "left", "right", etc., are presented for convenience in describing the embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Referring to fig. 1-9, the present embodiment provides a foldable frame, which includes two opposite upright frames 1, wherein one of the upright frames 1 is used as a front upright frame, the other is used as a rear upright frame, and the left upright frame 1 is used as a front upright frame, and the right upright frame 1 is used as a rear upright frame in the viewing angle direction of fig. 1.

As shown in fig. 1, the bottom of each stand 1 is provided with rollers 11, specifically, in this embodiment, the situation of using 4 rollers 11 is shown, and the bottom of each stand 1 is provided with two rollers 11 respectively, which is worth to be noted, in this embodiment, the space between two rollers 11 on one stand 1 is larger than the space between two rollers 11 on the other stand 1, so as to ensure that when the stand is folded, two rollers 11 with smaller space can be received in the space between two rollers 11 with larger space, and the state of the rollers after being folded can be shown in fig. 4.

In this embodiment, two rollers 11 with larger spacing are arranged on the rear stand, and two rollers 11 with smaller spacing are arranged on the front stand.

As shown in fig. 1, two sides of the two uprights 1 are respectively connected through two telescopic assemblies 2, and the telescopic assemblies 2 can be telescopic along opposite directions of the two uprights 1, wherein the opposite directions of the two uprights 1 can be understood as the length direction of the frame.

The lower parts of the two vertical frames 1 are connected through a foldable supporting frame 3, and the supporting frame 3 acts to drive the two vertical frames 1 to be folded or unfolded.

As shown in fig. 1 and fig. 2, the telescopic assembly 2 is a scissor-fork type connecting rod structure, and includes at least two sequentially connected scissor units, the scissor units are in an X shape, and a first hinge point R1 is formed in the middle of each scissor unit, and it should be noted that the first hinge point R1 herein refers to a hinge point of the scissor unit itself, that is, the scissor unit itself can rotate based on the first hinge point R1.

The two ends of the telescopic assembly 2 are respectively connected with the two uprights 1, so that a second hinging point R2 and a third hinging point R3 are formed on each upright 1, and the scissor units adjacent to the uprights 1 can rotate relative to the uprights 1.

Wherein the second hinge point R2 is located above the third hinge point R3; in the scissors assembly adjacent to the stand 1, a portion of the scissors assembly located between the first hinge point R1 and the third hinge point R3 is capable of telescoping with respect to the first hinge point R1.

Through the arrangement, in the process of switching the frame from the unfolded state (the state shown in fig. 1) to the folded state (the state shown in fig. 4), as shown in fig. 3, the support frame 3 is gradually folded, the two uprights 1 are continuously closed together, the telescopic assemblies 2 on the two sides are continuously contracted, and in the contraction process, the telescopic assemblies 2 are contracted at the part between the first hinging point R1 and the third hinging point R3 in the scissor units adjacent to the uprights 1, so that the first hinging point R1 can move downwards in the folding process, and the middle vertex position (the vertex position of the telescopic assemblies 2 can be understood as the upper connecting point at the connecting position of the two adjacent scissor units) of the telescopic assemblies 2 cannot extend upwards out of the uprights 1 under the folded state of the frame as shown in fig. 4; therefore, the height of the frame is not increased in the folded state, and the folded frame is smaller in packaging size, so that the frame is favorable for transportation and storage.

To achieve this: in the scissors assembly adjacent to the stand 1, a portion between the first hinge point R1 and the third hinge point R3 can be extended and contracted with respect to the first hinge point R1, and in this embodiment, the scissors assembly adjacent to the stand 1 is designed as follows:

as shown in fig. 1 and 2, the scissor unit adjacent to the stand 1 includes a positioning rod 21 and a telescopic rod 22, and the positioning rod 21 and the telescopic rod 22 are disposed in an X-shaped cross.

One end of the positioning rod 21 is hinged with the vertical frame 1 to form a second hinge point R2; the telescopic rod 22 includes a fixed rod 221 and a diagonal slide rod 222 that are axially slidable relative to each other, and the axial direction is also understood herein as the length direction of the telescopic rod 22.

The fixing rod 221 is hinged to the middle portion of the positioning rod 21 to form the first hinge point R1, and one end of the diagonal sliding rod 222, which is far away from the fixing rod 221, is hinged to the stand 1 to form the third hinge point R3.

As a specific embodiment, as shown in fig. 1, this embodiment shows a telescopic assembly 2 using two scissor units, specifically as follows: the two scissor units are respectively connected with the two uprights 1, and at this time, the two scissor units are equivalent to the scissor units adjacent to the uprights 1, so at this time, the two scissor units are equivalent to each other and consist of a positioning rod 21 and a telescopic rod 22.

The specific connection structure of the two shearing fork units is as follows: as shown in fig. 2, one ends of two positioning rods 21 in the two scissors elements are hinged together, and the other ends of the two positioning rods 21 are hinged with two uprights 1 respectively to form the second hinge point R2, for example, in this embodiment, one end of the two positioning rods 21 is hinged together, wherein the other end of one positioning rod 21 is hinged with a front upright, so as to form the second hinge point R2 on the front upright, and the other end of the other positioning rod 21 is hinged with a rear upright, so as to form the second hinge point R2 on the rear upright.

In addition, one ends of the two telescopic rods 22 are hinged together, and the other ends of the two telescopic rods 22 are respectively hinged with the two uprights 1 to form the third hinge point R3, specifically:

the rear ends of the fixing rods 221 of the two telescopic rods 22 are hinged, and the front end of the inclined slide rod 222 in one telescopic rod 22 is hinged on the front vertical frame, so that a third hinge point R3 is formed on the front vertical frame, and the front end of the inclined slide rod 222 of the other telescopic rod 22 is hinged on the rear vertical frame, so that a third hinge point R3 is formed on the rear vertical frame.

In addition, in the same scissor unit, the positioning rod 21 is hinged with the fixing rod 221 of the telescopic rod 22 to form the first hinge point R1.

Of course, in other alternative embodiments, the telescopic assembly 2 may also be formed by more than two scissor units, wherein in the telescopic assembly 2, other scissor units except the scissor units adjacent to the stand 1 may be X-shaped scissor units formed by two common connecting rods. The specific number of scissor units in the telescopic assembly 2 can be selected according to actual needs.

In the scissor unit adjacent to the stand 1, the specific structure of the telescopic rod 22 is:

as shown in fig. 2 and 5, the fixing rod 221 is hinged to the middle portion of the positioning rod 21 through a hinge shaft 23, and the hinge shaft 23 forms the aforementioned first hinge point R1, wherein the hinge shaft 23 may be a rivet or the like, which is not particularly limited herein.

The inclined slide bar 222 is provided with a sliding groove 2221 penetrating the inclined slide bar 222, the sliding groove 2221 extends along the length direction of the inclined slide bar 222, the hinge shaft 23 is arranged in the sliding groove 2221 in a penetrating manner, and the hinge shaft 23 can slide in the sliding groove 2221, so that the normal sliding of the inclined slide bar 222 is not hindered by the existence of the hinge shaft 23.

The fixing rod 221 has a channel extending along the length direction of the fixing rod 221, and the inclined sliding rod 222 movably penetrates the channel, which is equivalent to sliding the inclined sliding rod 222 in the channel of the fixing rod 221.

A positioning sleeve 24 with two open ends is fixed in the opening position of the channel of the fixed rod 221, the inclined sliding rod 222 is arranged in the positioning sleeve 24 in a sliding penetrating way, and the positioning sleeve 24 is preferably a plastic piece; the positioning sleeve 24 is equivalent to a sliding sleeve of the inclined sliding rod 222, and the inclined sliding rod 222 slides in the positioning sleeve 24; the meaning of setting the positioning sleeve 24 is that, in general, if the fixing rod 221 and the inclined slide rod 222 are made of metal, if the positioning sleeve 24 is not set, but the fixing rod 221 and the inclined slide rod 222 are attached to slide relatively, in the sliding process, larger friction damage is caused to the fixing rod 221 and/or the inclined slide rod 222, and after the positioning sleeve 24 is set, the fixing rod 221 and the inclined slide rod 222 can be prevented from being directly contacted, so that friction damage to the fixing rod 221 and the inclined slide rod 222 in the sliding process is reduced.

In this embodiment, the positioning sleeve 24 is disposed at the opening of the channel of the fixing rod 221, so as to facilitate installation of the hinge shaft 23, in this embodiment, a positioning hole 241 is formed in the positioning sleeve for the hinge shaft 23 to pass through, the hinge shaft 23 passes through the positioning hole 241, at this time, the hinge shaft 23 not only serves as a hinge point between the fixing rod 221 and the positioning rod 21, but also can fix the positioning sleeve 24 to prevent the positioning sleeve from falling out of the channel.

In this embodiment, the specific structure of the supporting frame 3 is: as shown in fig. 1 and 7, the supporting frame 3 includes two bottom frames 31, two bottom frames 31 are respectively connected to the two vertical frames 1 in a rotating manner, one end of one bottom frame 31 is hinged to the lower portion of one end of the two bottom frames 31 far away from the vertical frames 1, that is, one end of the other bottom frame 31 is connected to the front vertical frame in a rotating manner, and meanwhile, two opposite end undersides of the two bottom frames 31 are connected together in a rotating manner, when the folding device is folded, the two vertical frames 1 are gradually closed, and one end of the two bottom frames 31 connected in a rotating manner is turned upwards, so that folding is finally realized.

On the contrary, when the two stand frames 1 are unfolded, the two stand frames 1 are gradually far away, one end of the two stand frames 31 which are connected in a rotating way is turned downwards, and finally, in a fully unfolded state, one hinged end of the two stand frames 31 is propped against each other, so that the two stand frames 31 cannot be turned downwards continuously, and the frame is unfolded at the moment.

One end of the two chassis 31 that are rotatably connected is specifically configured as follows: as shown in fig. 7, two ends of the bottom frames 31 far away from the vertical frame 1 are fixedly connected with engaging pieces 311, and the lower parts of the end sides of the two engaging pieces 311 are hinged, which is equivalent to that the two bottom frames 31 are rotatably connected by hinging the two engaging pieces, and the specific structure of the engaging pieces 311 can be shown in fig. 9.

In order to make the frame have a certain self-locking property, that is, the two chassis 31 cannot easily turn upwards in the unfolded state, in this embodiment, in the unfolded state, as shown in fig. 9, the upper sides of one ends of the two chassis 31 abutted against each other are set to form an included angle α, specifically, it can be understood that an included angle α is formed between the upper side walls of the two engaging pieces 311, where the included angle α is 180 ° < 190 °, and preferably 185 °. At this time, under the dead weight of the two bottom frames 31, the two engaging pieces 311 are abutted against each other at the end sides to form a V-shape structure, so that the two bottom frames 31 cannot be turned upwards easily.

In addition, in other alternative embodiments, as shown in fig. 1 and 4, a foldable handle assembly 4 may be further disposed on at least one of the uprights 1, for example, the front upright, and the foldable handle assembly 4 is specifically applied and described in the existing foldable bicycle frame, so that redundant description is omitted herein.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (10)

1. The foldable frame comprises two opposite vertical frames, wherein rollers are arranged at the bottoms of the vertical frames, two sides of the two vertical frames are respectively connected through two telescopic assemblies, the telescopic assemblies can be telescopic along the opposite directions of the two vertical frames, the lower parts of the two vertical frames are connected through foldable supporting frames, and the supporting frames act to drive the two vertical frames to be folded or unfolded; the telescopic component is of a scissor type connecting rod structure and comprises at least two scissor units which are sequentially connected, wherein the scissor units are in an X shape, a first hinge point is formed in the middle of each scissor unit, two ends of the telescopic component are respectively connected with two vertical frames so as to form a second hinge point and a third hinge point on each vertical frame, and the second hinge point is positioned on the upper side of the third hinge point; and in the shearing fork unit adjacent to the vertical frame, the part of the shearing fork unit between the first hinging point and the third hinging point can stretch and retract relative to the first hinging point.

2. The foldable frame as claimed in claim 1, wherein the scissor unit adjacent to the stand comprises a positioning rod and a telescopic rod, the positioning rod and the telescopic rod are arranged in an X-shaped cross, and one end of the positioning rod is hinged with the stand to form the second hinge point; the telescopic rod comprises a fixed rod and an inclined sliding rod which can axially and relatively slide, wherein the fixed rod is hinged with the middle part of the positioning rod to form a first hinge point, and one end of the inclined sliding rod, which is far away from the fixed rod, is hinged with the vertical frame to form a third hinge point.

3. The foldable bicycle frame according to claim 2, wherein the fixing rod is hinged to the middle part of the positioning rod through a hinge shaft, a sliding groove penetrating through the inclined sliding rod is formed in the inclined sliding rod, the sliding groove extends along the length direction of the inclined sliding rod, and the hinge shaft penetrates through the sliding groove.

4. A foldable frame according to claim 3, wherein the fixing bar has a channel extending along the length of the fixing bar, and the diagonal slide bar is movably disposed in the channel.

5. The foldable frame of claim 4, wherein a positioning sleeve is provided in the mouth of the channel of the fixing rod, and the diagonal slide bar is slidably disposed in the positioning sleeve.

6. The foldable frame of claim 5, wherein the positioning sleeve is provided with a positioning hole therethrough, and the hinge shaft passes through the positioning hole.

7. A foldable frame according to claim 2, wherein the telescopic assembly comprises two scissor units, each connected to two uprights; one ends of two positioning rods in the two scissors fork units are hinged, and the other ends of the two positioning rods are respectively hinged with the two vertical frames to form the second hinge point; one ends of the two telescopic rods are hinged, and the other ends of the two telescopic rods are respectively hinged with the two vertical frames to form a third hinge point; in the same scissors unit, the positioning rod is hinged with the fixed rod of the telescopic rod to form the first hinge point.

8. A foldable frame as claimed in claim 1, wherein the support comprises two underframes, the two underframes are respectively rotatably connected to the two uprights, the lower parts of the ends of the two underframes, which are far away from the uprights, are hinged, and the ends of the two underframes, which are hinged, are abutted against each other in the unfolded state.

9. A foldable frame according to claim 8, wherein in the unfolded state the upper sides of the ends of the two chassis which are in abutment are arranged at an angle α, wherein 180 ° < angle α is less than or equal to 190 °.

10. A foldable frame according to claim 8 or 9, wherein the end of the underframe remote from the stand is fixedly connected with a snap-in piece, and the lower parts of the end sides of the two snap-in pieces are hinged.