CN215322806U

CN215322806U - Folding cart

Info

Publication number: CN215322806U
Application number: CN202120795135.7U
Authority: CN
Inventors: 高翔; 张兴荣
Original assignee: Goodbaby Child Products Co Ltd
Current assignee: Goodbaby Child Products Co Ltd
Priority date: 2021-02-05
Filing date: 2021-04-19
Publication date: 2021-12-28
Anticipated expiration: 2031-04-19
Also published as: CN113665658A; CN113665658B

Abstract

The utility model discloses a folding cart, wherein a frame of the folding cart comprises two groups of side supports and a cross support assembly connected between the side supports, the side supports comprise a first support rod and a second support rod which are connected in a rotating mode, the cross support assembly comprises a cross support rod, the cross support rod comprises a first rod and a second rod, the first rod is arranged on the first support rod on one side in a rotating mode around the axis of the first rod, the second rod is fixedly arranged on the first support rod on the other side, and the first rod and the second rod are connected in a sliding mode along the left-right direction. A matching structure is arranged between the first rod and the second rod, so that the first rod can slide and stretch relative to the second rod in the rotating process. The frame is also provided with a transmission mechanism which is used for enabling the first support rod to rotate around the axis of the first support rod in a linkage manner in the process that the second support rod rotates relative to the first support rod. According to the folding cart disclosed by the utility model, the side supports and the cross brace component can be folded and unfolded in a linkage manner, the operation is simple and convenient, and the volume is small after the cart frame is folded, so that the cart is convenient to store and carry.

Description

Folding cart

Technical Field

The utility model relates to the field of children products, in particular to a folding cart.

Background

Among the prior art, the frame structure diverse of folding shallow, its folding principle is also diverse, and many shallow can not realize folding in the width direction about the frame, or folding needs go on in multistep, have folding bulky, folding operation complicacy, be not convenient for accomodate and carry the problem.

Disclosure of Invention

The utility model aims to provide a folding trolley which is small in folding volume and simple and convenient to fold.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a folding cart comprises a cart frame with an unfolding state and a folding state, wherein the cart frame comprises two groups of side brackets which are respectively arranged at the left side and the right side, and a cross brace component which is connected between the two groups of side brackets, the side support at least comprises a first support rod and a second support rod which are mutually rotatably connected, the transverse support component comprises a transverse support rod arranged between the first support rods at two sides, the transverse supporting rods comprise a first rod and a second rod which respectively extend along the left and right directions, the first rod is arranged on the first supporting rod on one side in a relatively rotating mode around the axis of the first rod, the second rod is fixedly arranged on the first supporting rod on the other side, the first rod and the second rod are connected in a sliding way along the left-right direction, a matching structure is arranged between the first rod and the second rod, the matching structure enables the first rod to slide and stretch relative to the second rod in the process of rotating around the axis of the first rod; the frame is also provided with a transmission mechanism which is used for enabling the first rod to rotate around the axis of the first rod in a linkage manner in the process that the second support rod rotates relative to the first support rod; the transverse support component also comprises at least one auxiliary support rod which is arranged between the side supports at two sides and can slide and stretch along the left-right direction.

Preferably, the first rod can relatively slide and relatively rotate around the axis of the first rod to be inserted into the rod cavity of the second rod, the matching structure includes a spiral groove disposed on the second rod and a limiting member disposed on the first rod, wherein the limiting member is fixedly disposed on an end portion of the first rod inserted into the second rod, the spiral groove spirally extends along the length direction of the second rod, and the limiting member can be relatively slidably inserted into the spiral groove.

Further preferably, the limiting member is a limiting pin detachably disposed on the first rod, and an axial extending direction of the limiting pin is perpendicular to an axial line of the first rod.

Further preferably, an outer sleeve is fixedly sleeved outside the second rod, a fitting groove which is consistent with the extending track of the spiral groove is further formed in the inner peripheral wall of the outer sleeve, one end of the limiting member is slidably inserted into the spiral groove, and the other end of the limiting member is slidably inserted into the fitting groove.

Preferably, the transmission mechanism comprises: the first gear is fixedly arranged on the second support rod, and the second support rod and the first gear are connected together around a first rotation center line in a rotating mode relative to the first support rod; the second gear is fixedly arranged on the first rod and is arranged coaxially with the first rod.

In some embodiments, the first gear intermeshes with the second gear, and the first rotational centerline and the axis of the first shaft are parallel to each other.

In some embodiments, the transmission mechanism further comprises a transmission assembly drivingly disposed between the first and second gears.

Further preferably, the transmission assembly includes a transmission gear set, the transmission gear set includes a third gear and a fourth gear which are coaxially and fixedly arranged with each other, the third gear and the fourth gear are relatively rotatably connected to the first bracket rod around a second rotation center line, wherein the first gear is engaged with the third gear, and the fourth gear is engaged with the second gear.

Still further preferably, the first lever is rotatably connected to the first frame lever about the first rotation center line.

Still further preferably, the first rotation center line is located above the second rotation center line on the first carriage bar.

Still further preferably, the diameter of the first gear is larger than the diameter of the third gear, and the diameter of the fourth gear is larger than the diameter of the second gear.

Still further preferably, the second gear is integrally formed on the first rod.

Still further preferably, the second gear has an outer diameter larger than an inner diameter of the rod cavity of the second rod.

In some preferred embodiments, the side brackets include a front wheel bracket provided with a front wheel assembly at the bottom, and a rear wheel bracket provided with a rear wheel assembly at the bottom, and the front wheel bracket or the rear wheel bracket constitutes the first bracket rod.

In some preferred embodiments, an upper portion of the front wheel carrier is rotatably connected with an upper portion of the rear wheel carrier, and the side carrier further includes: the lower part of the push rod frame is rotationally connected with the upper part of the rear wheel bracket; the rear part of the armrest frame is rotationally connected to the push rod frame; the front supporting frame is rotationally connected to the front wheel bracket, the upper part of the front supporting frame is rotationally connected to the armrest frame, and the lower part of the front supporting frame is rotationally connected with a sliding piece; a link assembly including a front link and a rear link both extending in a front-rear direction, a front portion of the front link being rotatably connected to the front wheel bracket, a rear portion of the front link being rotatably connected to a front portion of the rear link, a rear portion of the rear link being rotatably connected to the rear wheel bracket, the slider being slidably disposed on the front link in a front-rear direction; the front wheel bracket forms the first bracket rod, the push rod bracket forms the second bracket rod, and the transverse support rod is arranged at the upper parts of the front wheel brackets at two sides.

In some preferred embodiments, an upper portion of the front wheel carrier is rotatably connected with an upper portion of the rear wheel carrier, and the side carrier further includes: a side rail, a lower portion of which is rotatably connected with an upper portion of the rear wheel bracket; the upper parts of the side handrails are rotatably connected to the push rod frame; the rear support frame is rotationally connected to the rear wheel bracket, and the upper part of the rear support frame is rotationally connected with the lower part of the push rod frame; the front part of the bottom bracket is rotationally connected to the front wheel bracket, and the rear part of the bottom bracket is rotationally connected with the lower part of the rear bracket; the rear wheel support forms the first support rod, the rear support forms the second support rod, and the transverse support rods are arranged at the upper parts of the rear wheel supports on the two sides.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages: according to the folding cart disclosed by the utility model, when the second support rod rotates relative to the first support rod, the transmission mechanism is matched with the matching structure, so that the first rod can slide and stretch along the left and right directions relative to the second rod, and the side support and the cross support component can be linked, folded and unfolded, the operation is simple and convenient, and the folded cart frame is small in size and convenient to store and carry.

Drawings

FIG. 1 is a perspective view of a folded stroller in an unfolded state in accordance with an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the foldable stroller at another angle in an unfolded state according to the first embodiment;

FIG. 3 is a schematic side view of the folding cart in an unfolded state according to the first embodiment;

FIG. 4 is an exploded view of the folding cart according to the first embodiment;

FIG. 5 is a schematic perspective view of a portion of a folding cart in accordance with a first embodiment;

FIG. 6 is an exploded view of FIG. 5;

FIG. 7 is a further exploded view of FIG. 6;

FIG. 8 is a schematic perspective view of the folding cart in the first embodiment;

FIG. 9 is a schematic perspective view of the folding cart shown in the first embodiment at another angle during folding;

FIG. 10 is a schematic side view of the folding cart in a first embodiment during folding;

FIG. 11 is a perspective view of the folding cart in the folded state according to the first embodiment;

FIG. 12 is a rear view of the folding cart in a folded state according to the first embodiment;

FIG. 13 is a schematic side view of the folding cart in a folded state according to the first embodiment;

fig. 14 is a perspective view of the folding cart in the second embodiment in an unfolded state;

fig. 15 is a perspective view of the folding cart according to the second embodiment at another angle in an unfolded state;

FIG. 16 is a schematic side view of the foldable stroller in the second embodiment in an unfolded state;

FIG. 17 is an exploded view of the folding cart in accordance with the second embodiment;

FIG. 18 is an exploded perspective view of the folding cart according to the second embodiment;

FIG. 19 is a partially exploded perspective view of the folding cart in accordance with the second embodiment;

FIG. 20 is a further exploded view of FIG. 19;

fig. 21 is a schematic perspective view of the folding cart in the second embodiment during folding;

FIG. 22 is a schematic perspective view of the folding cart shown in the second embodiment at another angle during folding;

FIG. 23 is a schematic side view of the folding cart in accordance with the second embodiment during folding;

FIG. 24 is a perspective view of the folding cart in a folded state according to the second embodiment;

FIG. 25 is a rear view of the folding cart in a folded state according to the second embodiment;

FIG. 26 is a schematic side view of the folding cart of the second embodiment in a folded state;

wherein: 100. a side bracket; 101. a front wheel bracket; 102. a rear wheel support; 103. a side arm rest; 104. a push rod frame; 1041. a push rod is arranged; 1042. a lower push rod; 105. a rear support frame; 106. a bottom bracket; 107. a handrail frame; 108. a front bracket; 1081. a slider; 109. a front link; 110. a rear connecting rod; 111. a seat post; 112. a seat link;

200. a cross brace assembly; 201. a transverse stay bar; 202. attaching a support rod;

300. a front wheel assembly; 400. a rear wheel assembly; 500. a handle bar; 501. an unlock button;

1. a first lever; 11. a limiting member; 2. a second lever; 21. a helical groove; 3. a first gear; 4. a second gear; 5. a third gear; 6. a fourth gear; 7. an outer sleeve; 8. a loop bar; 9. a slide bar;

1000. a first rotational centerline; 2000. a second centerline of rotation.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the utility model may be more readily understood by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "left-right", "height", "front-back" and the like indicate orientations or positional relationships that, when an adult of a stroller holds the putter frame 104, based on fig. 1, are shown only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, only have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. 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.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. Further, the description of the upper, lower, left, right, etc. used in the present invention is only with respect to the positional relationship of the respective components of the present invention with respect to each other in the drawings.

Example one

Referring to fig. 1 to 3, a foldable cart includes a frame having an unfolded state and a folded state, a front wheel assembly 300 and a rear wheel assembly 400 disposed at the bottom of the frame, the frame includes two sets of side brackets 100 disposed at the left and right sides, and a cross brace assembly 200 connected between the two sets of side brackets 100, the side brackets 100 at least include a first bracket rod and a second bracket rod which are connected in a mutual rotation manner, and when the first bracket rod and the second bracket rod rotate relatively to be folded, all the cross brace assemblies 200 can be linked to be folded in along the left and right directions. The folding cart further comprises a locking device for locking the frame in the unfolded state.

In this embodiment, the side bracket 100 specifically includes a front wheel bracket 101, a rear wheel bracket 102, a push rod bracket 104, an armrest bracket 107, a front bracket 108, a connecting rod assembly, and the like. Wherein, when the frame is in the development state:

the front wheel assembly 300 is provided at the bottom of the front wheel bracket 101, the rear wheel assembly 400 is provided at the bottom of the rear wheel bracket 102, and the rear portion of the front wheel bracket 101 is rotatably connected to the upper portion of the rear wheel bracket 102 through a rotation shaft i.

The push rod frame 104 includes an upper push rod 1041 and a lower push rod 1042 which are telescopically and slidably connected, the upper push rod 1041 is slidably accommodated in a rod cavity of the lower push rod 1042, and a lower portion of the push rod frame 104 is rotatably connected to an upper portion of the rear wheel bracket 102 through a rotating shaft j.

The rear portion of the handle frame 107 is rotatably coupled to the push rod frame 104 by a rotating shaft t.

The front bracket 108 is rotatably connected to the front wheel bracket 101 through a rotation shaft p, the upper part of the front bracket 108 is rotatably connected to the armrest frame 107 through a rotation shaft k, and the lower part of the front bracket 108 is rotatably connected to the slider 1081 through a rotation shaft m.

The link assembly specifically includes a front link 109 and a rear link 110 each extending in the front-rear direction, a front portion of the front link 109 is rotatably connected to the front wheel bracket 101 through a rotation shaft n, a rear portion of the front link 109 is rotatably connected to a front portion of the rear link 110 through a rotation shaft o, a rear portion of the rear link 110 is rotatably connected to the rear wheel bracket 102 through a rotation shaft u, and a slider 1081 is slidably provided on the front link 109 in the front-rear direction.

The axial lines of the rotating shaft i, the rotating shaft j, the rotating shaft k, the rotating shaft m, the rotating shaft n, the rotating shaft o, the rotating shaft p, the rotating shaft t and the rotating shaft u extend along the left-right direction of the frame. In the length direction of the front bracket 108, the rotating shaft p is located between the rotating shaft k and the rotating shaft m; the pivot j is located above the pivot i on the front wheel bracket 101.

Referring to fig. 4, the frame of the present embodiment further includes a handle rod 500 connected between the push rod frames 104 at two sides, two ends of the handle rod 500 are respectively rotatably connected to the upper end of the upper push rod 1041 at the same side through a rotating shaft q, and an axis of the rotating shaft q extends along the length direction of the push rod frame 104.

The locking device in this embodiment is disposed at the rotational connection between the down-push rod 1042 and the front wheel bracket 101, which may be implemented by the prior art, but the utility model is not limited thereto. The middle of the handle bar 500 is provided with an unlocking button 501 for unlocking the locking device.

In this embodiment, the front wheel bracket 101 forms a first bracket rod, and the push rod bracket 104 forms a second bracket rod.

The cross brace assembly 200 includes a cross brace 201 disposed between the first side braces at two sides, and a plurality of auxiliary braces 202 disposed between the side braces 100 and capable of sliding and stretching along the left-right direction, in this embodiment, at least two auxiliary braces 202 are respectively disposed between the front wheel brackets 101 and between the rear wheel brackets 102 at two sides. When the side brackets 100 rotate and drive the transverse supporting rods 201 to extend and retract along the left and right directions, all the auxiliary supporting rods 202 can extend and retract synchronously, so that the left and right side brackets 100 are close to each other, and the folding of the whole frame in the left and right directions is realized.

Referring to fig. 4 to 7, in the present embodiment, a crossbar 201 is provided at the upper portion of the front wheel carrier 101 on both sides. The transverse supporting rod 201 comprises a first rod 1 and a second rod 2 which respectively extend along the left-right direction, the first rod 1 is arranged on the left front wheel support 101 in a relatively rotating mode around the axis of the first rod 1, the second rod 2 is fixedly arranged on the right front wheel support 101, the first rod 1 is connected with the second rod 2 in a sliding mode along the left-right direction, and a matching structure is arranged between the first rod 1 and the second rod 2, so that the first rod 1 can stretch and retract relative to the second rod 2 in the rotating process around the axis of the first rod 1.

Specifically, the first rod 1 can both slide relatively and rotate relatively around its axis to penetrate through the rod cavity of the second rod 2. The matching structure comprises a spiral groove 21 arranged on the second rod 2 and a limiting part 11 arranged on the first rod 1, wherein the limiting part 11 is fixedly arranged on the end part of the first rod 1 penetrating the second rod 2, the spiral groove 21 spirally extends along the length direction of the second rod 2, and the limiting part 11 can be inserted in the spiral groove 21 in a relative sliding fit manner. In this embodiment, the limiting member 11 is a limiting pin detachably disposed on the first rod 1, and is in threaded connection with the first rod 1, and an axial extending direction of the limiting pin is perpendicular to an axial line of the first rod 1. In the process that the first rod 1 rotates around the axis line of the first rod, the limiting piece 11 slides along the spiral groove 21, so that the first rod 1 slides and stretches in the left-right direction relative to the second rod 2.

In addition, an outer sleeve (not shown) is fixedly sleeved outside the second rod 2, a matching groove which is consistent with the extending track of the spiral groove 21 is formed in the inner peripheral wall of the outer sleeve, one end of the limiting member 11 is slidably inserted into the spiral groove 21, and the other end of the limiting member 11 is slidably inserted into the matching groove, so that matching guidance is realized, the telescopic sliding of the transverse supporting rod 201 is smoother, and the outside is more beautiful.

Furthermore, the frame is also provided with a transmission mechanism which can make the first rod 1 rotate around the axis line of the first rod in a linkage manner in the process that the push rod frame 104 rotates relative to the front wheel bracket 101.

The transmission mechanism at least comprises a first gear 3 and a second gear 4, wherein the first gear 3 is fixedly arranged on the push rod frame 104, and the push rod frame 104 and the first gear 3 are connected together around a first rotation center line 1000 in a rotating way relative to the front wheel bracket 101; the second gear 4 is fixedly arranged on the first rod 1, and the second gear 4 and the first rod 1 are arranged coaxially.

In some embodiments, the first gear 3 can be directly meshed with the second gear 4, and the first rotation center line 1000 is parallel to the axis of the first rod 1, so that when the push rod frame 104 and the first gear 3 rotate, the second gear 4 and the first rod 1 are driven to rotate.

In this embodiment, the transmission mechanism further includes a transmission assembly, and the transmission assembly is drivingly disposed between the first gear 3 and the second gear 4, so that the first gear 3 rotates for a time period grounded to drive the second gear 4 to rotate. Specifically, the transmission assembly comprises a transmission gear set, the transmission gear set comprises a third gear 5 and a fourth gear 6 which are coaxially and fixedly arranged, the third gear 5 and the fourth gear 6 are connected to the front wheel bracket 101 in a relative rotation mode around a second rotation center line 2000 together, the first gear 3 and the third gear 5 are meshed with each other, and the fourth gear 6 and the second gear 4 are meshed with each other.

In this embodiment, on the front wheel bracket 101, the first rotation center line 1000 is located above the second rotation center line 2000, and the second rotation center line 2000 is located above the axis of the first lever 1.

Further, the diameter of the first gear 3 is larger than that of the third gear 5, and the diameter of the fourth gear 6 is larger than that of the second gear 4. In the present embodiment, the second gear 4 is integrally formed on the first lever 1. The outer diameter of the second gear 4 is larger than the inner diameter of the rod cavity of the second rod 2, so that a limit can be formed, and the first rod 1 cannot be completely accommodated in the rod cavity of the second rod 2.

In this embodiment, all the auxiliary stay bars 202 include a slide bar 9 and a sleeve bar 8 which extend along the left-right direction, in each group of auxiliary stay bars 202, the slide bar 9 is disposed on the right side support 100, the sleeve bar 8 is disposed on the left side support 100, the sleeve bar 8 has a bar cavity extending along the length direction thereof, the outer diameter of the slide bar 9 is smaller than the inner diameter of the bar cavity of the sleeve bar 8, and thus the slide bar 9 can be slidably inserted into the bar cavity of the sleeve bar 8 along the left-right direction.

The folding principle of the folding cart in this embodiment is specifically described below:

referring to fig. 8 to 10, when the folding cart of this embodiment is folded, the unlocking button 501 on the handle bar 500 is pressed first, so that the bars can rotate relatively; then the upper push rod 1041 is pressed down to contract and fold with the lower push rod 1042, and simultaneously the push rod frame 104 is rotated forward integrally and folds with the front wheel bracket 101.

In this process, drive mechanism and cooperation structure can order about first pole 1 and slide the indentation relative to second pole 2: taking the view angle shown in fig. 8 as an example, when the left side transmission mechanism of the folding cart is viewed from the left side of the folding cart, the push rod frame 104 rotates forward and downward, so that the first gear 3 rotates counterclockwise around the first rotation center line 1000, the third gear 5 engaged with the first gear rotates clockwise, the fourth gear 6 also rotates clockwise, and further the second gear 4 engaged with the fourth gear rotates counterclockwise, that is, the first gear 3 rotates the second gear 4 in the same direction as the first gear through the transmission assembly, the first rod 1 rotates counterclockwise, so that the limiting member 11 slides along the spiral groove 21, and the first rod 1 retracts in the left-right direction relative to the second rod 2.

When the first lever 1 retracts relative to the second lever 2, the left and right brackets 100 approach each other, so that all the auxiliary stays 202 can slide and retract in the left-right direction, and the push rod brackets 104 on both sides are retracted to the rear side of the grip lever 500 around the rotation axis q.

Meanwhile, the armrest frame 107 and the front support frame 108 are rotated and folded between the push rod frame 104 and the front wheel bracket 101, the sliding piece 1081 slides backwards along the front connecting rod 109, the push rod frame 104 continues to rotate forwards, so that the front wheel bracket 101 and the rear wheel bracket 102 are close to each other, and the frame is folded in the up-down and front-back directions.

Referring to fig. 11 to 13, when the push rod frame 104 and the front wheel support 101 are completely rotated and folded, all the cross brace assemblies 200 are also folded, all the slide rods 9 are inserted into the rod cavities of the loop bars 8, and the frame is folded in the height direction, the front-back direction and the width direction, so that the folding operation is simple, the folding volume is small, and the frame is convenient to store and carry.

When the frame in a folded state needs to be unfolded, the steps are reversely operated: the push rod frame 104 is pulled upwards to rotate upwards and backwards, and the transmission mechanism and the matching structure link the first rod 1 to slide and extend relative to the second rod 2, so that the whole left and right side supports 100 are far away from each other and are unfolded, and details are not repeated.

Example two

Referring to fig. 14 to 26, the folding cart of this embodiment is substantially the same as the first embodiment, and the main difference is the specific structure of each rod of the frame.

In this embodiment, the side frame 100 specifically includes a front wheel frame 101, a rear wheel frame 102, a side armrest 103, a push rod frame 104, a rear support frame 105, a bottom support frame 106, a seat rod 111, a seat link 112, and the like. Wherein, when the frame is in the development state:

the front wheel assembly 300 is provided at the bottom of the front wheel bracket 101, the rear wheel assembly 400 is provided at the bottom of the rear wheel bracket 102, and the upper portion of the front wheel bracket 101 and the upper portion of the rear wheel bracket 102 are rotatably connected by a rotating shaft c.

The lower portion of the side arm rest 103 is rotatably connected to the upper portion of the rear wheel bracket 102 via a rotating shaft b, and the upper portion of the side arm rest 103 is rotatably connected to the push rod frame 104 via a rotating shaft a.

The rear bracket 105 is rotatably connected to the rear wheel bracket 102 via a rotating shaft s, and an upper portion of the rear bracket 105 is rotatably connected to a lower portion of the push rod frame 104 via a rotating shaft r.

The front part of the bottom bracket 106 is rotatably connected to the front wheel bracket 101 through a rotating shaft g, and the rear part of the bottom bracket 106 is rotatably connected to the lower part of the rear bracket 105 through a rotating shaft d.

The seat rod 111 is used for providing sitting support for children, and the rear part of the seat rod is rotationally connected with the rear support frame 105 through a rotating shaft e; the upper portion of the seat link 112 is rotatably connected to the seat rod 111 through a rotation shaft f, and the lower portion of the seat link 112 is rotatably connected to the upper portion of the rear bracket 102 through a rotation shaft c.

The push rod frame 104 is inclined and extended from bottom to top, and the rotating shaft r is located below the rotating shaft a. In the length extending direction of the rear bracket 105, the rotating shaft s is positioned between the rotating shaft a and the rotating shaft d; the rotation axis b is located above the rotation axis c on the rear wheel bracket 102. The axes of the rotating shaft a, the rotating shaft b, the rotating shaft c, the rotating shaft d, the rotating shaft e, the rotating shaft f, the rotating shaft g, the rotating shaft r and the rotating shaft s extend along the left and right direction of the frame.

Referring to fig. 17, the frame of the present embodiment also includes a handle rod 500 connected between the push rod frames 104 on both sides, both ends of the handle rod 500 are respectively rotatably connected to the upper ends of the push rod frames 104 on the same side through a rotating shaft h, and an axis of the rotating shaft h extends along the length direction of the push rod frames 104.

The locking device in this embodiment is disposed at the rotational connection between the side armrest 103 and the push rod frame 104, and the specific structure of the locking device may be the existing locking device, which is not limited in the present invention. The middle of the handle bar 500 is also provided with an unlocking button 501 for unlocking the locking device.

In this embodiment, the rear wheel bracket 102 constitutes a first bracket bar, and the rear bracket 105 constitutes a second bracket bar.

The cross brace assembly 200 includes a cross brace 201 disposed between the first side support rods on both sides, and a plurality of auxiliary braces 202 disposed between the side supports 100 and capable of sliding and stretching in the left-right direction, in this embodiment, at least three auxiliary braces 202 are respectively disposed between the seat rods 111 on both sides, between the front wheel supports 101, and between the rear wheel supports 102. In each group of the auxiliary stay 202, the sliding rod 9 is arranged on the left side bracket 100, and the loop bar 8 is arranged on the right side bracket 100.

Referring to fig. 17 to 20, in the present embodiment, a lateral brace 201 is provided at an upper portion of each of the rear wheel brackets 102 on both sides, a first rod 1 is provided on the left rear wheel bracket 102 so as to be relatively rotatable about its own axis, and a second rod 2 is fixedly provided on the right rear wheel bracket 102. The structure of the engagement between the first rod 1 and the second rod 2 is the same as in the first embodiment.

In this embodiment, the outer portion of the second rod 2 is also fixedly sleeved with an outer sleeve 7, and the inner peripheral wall of the outer sleeve 7 is provided with a matching groove (not shown) which is consistent with the extending track of the spiral groove 21.

Similarly to the first embodiment, the transmission mechanism in this embodiment can be linked to rotate the first rod 1 around its axis during the rotation of the rear bracket 105 relative to the rear wheel bracket 102. The transmission mechanism also comprises a first gear 3, a second gear 4 and a transmission gear set, wherein the first gear 3 is fixedly arranged on the rear bracket 105, and the rear bracket 105 and the first gear 3 are connected together around a first rotation center line 1000 in a rotating manner relative to the rear wheel bracket 102; the second gear 4 is fixed on the first rod 1 and arranged coaxially.

The transmission gear set comprises a third gear 5 and a fourth gear 6 which are fixedly arranged with the same axial lead, the third gear 5 and the fourth gear 6 are connected to the rear wheel bracket 102 together around a second rotation central line 2000 in a relative rotation mode, wherein the first gear 3 is meshed with the third gear 5, and the fourth gear 6 is meshed with the second gear 4.

In this embodiment, the first rod 1 is rotatably connected to the rear wheel bracket 102 about a first rotation center line 1000, and the axis of the first rod 1 is collinear with the first rotation center line 1000, and the first rotation center line 1000 is also the common axis of the first gear 3 and the second gear 4, and the first rotation center line 1000 is located above the second rotation center line 2000 on the rear wheel bracket 102.

referring to fig. 21 to 23, when the frame needs to be folded, an unlocking button 501 on the handle bar 500 is firstly pressed, so that the bar members can rotate relatively; the push rod frame 104 is then pressed downward to drive the side arm rests 103 and the rear stay 105 to rotate backward and to be folded with the rear wheel bracket 102.

In this process, drive mechanism and cooperation structure can order about first pole 1 and slide the indentation relative to second pole 2: taking the view angle shown in fig. 22 as an example, when the left transmission mechanism of the folding cart is viewed from the left side of the folding cart, the rear stay 105 rotates backward and downward, so that the first gear 3 rotates clockwise around the first rotation center line 1000, the third gear 5 engaged with the first gear is driven to rotate counterclockwise, the fourth gear 6 also rotates counterclockwise, and further the second gear 4 engaged with the fourth gear is driven to rotate clockwise, that is, the first gear 3 drives the second gear 4 to rotate in the same direction as the first gear through the transmission assembly, the first rod 1 rotates clockwise, so that the limiting member 11 slides along the spiral groove 21, and the first rod 1 retracts in the left-right direction relative to the second rod 2.

As can be seen from the figure, the rotation extending direction of the spiral groove 21 in the present embodiment is opposite to that in the first embodiment, which is designed according to the specific arrangement of the first and second support rods, so as to enable the relative retraction of the first and

second rods

1 and 2 when the first and second support rods rotate close to each other.

When the first rod 1 retracts relative to the second rod 2, the left and right brackets 100 approach each other, so that all the auxiliary stay bars 202 can slide and retract in the left-right direction, and the push rod brackets 104 on both sides are retracted to the rear side of the grip lever 500 around the rotation axis h.

Meanwhile, when the rear stay 105 rotates, the bottom bracket 106 is driven to rotate, so that the front wheel bracket 101 and the rear wheel bracket 102 are drawn close to each other, and the frame is folded in the front-rear direction.

As shown in fig. 24 to 26, when the rear support frame 105 and the rear wheel bracket 102 are completely rotated and folded, all the cross brace assemblies 200 are also folded, all the slide bars 9 are inserted into the bar cavities of the loop bars 8, and the frame is folded in the height direction, the front-back direction and the width direction, so that the folding operation is simple, the folding volume is small, and the frame is convenient to store and carry.

When the frame in the folded state needs to be unfolded, the steps are operated in the reverse direction, and the detailed description is omitted.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a folding shallow, is including having the frame of expansion state and fold condition, the frame is including dividing two sets of collateral branch framves, the connection of locating the left and right sides two sets of stull subassembly between the collateral branch frame, its characterized in that: the side bracket at least comprises a first bracket rod and a second bracket rod which are mutually and rotatably connected,

the transverse supporting component comprises transverse supporting rods arranged between the first supporting rod on two sides, each transverse supporting rod comprises a first rod and a second rod which extend along the left-right direction, the first rods are arranged on the first supporting rod on one side in a relatively rotating mode around the axis of the first rods, the second rods are fixedly arranged on the first supporting rod on the other side, the first rods and the second rods are connected in a sliding mode along the left-right direction, a matching structure is arranged between the first rods and the second rods, and the matching structure enables the first rods to stretch and retract relative to the second rods in a sliding mode in the process that the first rods rotate around the axis of the first rods;

the frame is also provided with a transmission mechanism which is used for enabling the first rod to rotate around the axis of the first rod in a linkage manner in the process that the second support rod rotates relative to the first support rod;

the transverse support component also comprises at least one auxiliary support rod which is arranged between the side supports at two sides and can slide and stretch along the left-right direction.

2. The folding cart of claim 1, wherein: the first rod can relatively slide and can relatively rotate around the axis of the first rod to penetrate through a rod cavity of the second rod, the matching structure comprises a spiral groove and a limiting part, the spiral groove is formed in the second rod, the limiting part is arranged on the first rod, the limiting part is fixedly arranged at the end part of the first rod penetrating through the second rod, the spiral groove extends spirally along the length direction of the second rod, and the limiting part can be inserted into the spiral groove in a relatively sliding fit mode.

3. The folding cart of claim 2, wherein: the limiting part is a limiting pin detachably arranged on the first rod, and the axial extension direction of the limiting pin is perpendicular to the axial lead of the first rod.

4. The folding cart of claim 2, wherein: the outer portion of the second rod is fixedly sleeved with an outer sleeve, a matching groove which is consistent with the extending track of the spiral groove is further formed in the peripheral wall of the inner side of the outer sleeve, one end portion of the limiting piece is slidably inserted into the spiral groove, and the other end portion of the limiting piece is slidably inserted into the matching groove.

5. The folding cart of claim 1, wherein: the transmission mechanism at least comprises a first gear and a second gear, the first gear is fixedly arranged on the second support rod, the second support rod and the first gear are jointly connected around a first rotation center line in a rotating way relative to the first support rod, the second gear is fixedly arranged on the first rod, the second gear and the first rod are arranged coaxially,

the first gear and the second gear are meshed with each other; or the like, or, alternatively,

the transmission mechanism further comprises a transmission assembly which is arranged between the first gear and the second gear in a transmission manner.

6. The folding cart of claim 5, wherein: the transmission assembly comprises a transmission gear set, the transmission gear set comprises a third gear and a fourth gear which are fixedly arranged with the same axis, the third gear and the fourth gear are connected to the first support rod in a relative rotation mode around a second rotation center line, the first gear is meshed with the third gear, and the fourth gear is meshed with the second gear.

7. The folding cart of claim 6, wherein: the first rod is rotatably connected to the first support rod around the first rotation center line; and/or the presence of a gas in the gas,

the first rotation center line is positioned above the second rotation center line on the first support rod; and/or the presence of a gas in the gas,

the diameter of the first gear is larger than that of the third gear, and the diameter of the fourth gear is larger than that of the second gear; and/or the presence of a gas in the gas,

the second gear is integrally formed on the first rod; and/or the presence of a gas in the gas,

the second gear has an outer diameter greater than an inner diameter of the rod cavity of the second rod.

8. The folding cart according to any one of claims 1 to 7, characterized in that: the side support comprises a front wheel support with a front wheel assembly at the bottom and a rear wheel support with a rear wheel assembly at the bottom, and the front wheel support or the rear wheel support forms the first support rod.

9. The folding cart of claim 8, wherein: the upper portion of front wheel support with the upper portion of rear wheel support is connected with rotatoryly, the side branch frame still includes:

the lower part of the push rod frame is rotationally connected with the upper part of the rear wheel bracket;

the rear part of the armrest frame is rotationally connected to the push rod frame;

the front supporting frame is rotationally connected to the front wheel bracket, the upper part of the front supporting frame is rotationally connected to the armrest frame, and the lower part of the front supporting frame is rotationally connected with a sliding piece;

a link assembly including a front link and a rear link both extending in a front-rear direction, a front portion of the front link being rotatably connected to the front wheel bracket, a rear portion of the front link being rotatably connected to a front portion of the rear link, a rear portion of the rear link being rotatably connected to the rear wheel bracket, the slider being slidably disposed on the front link in a front-rear direction;

the front wheel bracket forms the first bracket rod, the push rod bracket forms the second bracket rod, and the transverse support rod is arranged at the upper parts of the front wheel brackets at two sides.

10. The folding cart of claim 8, wherein: the upper portion of front wheel support with the upper portion of rear wheel support is connected with rotatoryly, the side branch frame still includes:

a side rail, a lower portion of which is rotatably connected with an upper portion of the rear wheel bracket;

the upper parts of the side handrails are rotatably connected to the push rod frame;

the rear support frame is rotationally connected to the rear wheel bracket, and the upper part of the rear support frame is rotationally connected with the lower part of the push rod frame;

the front part of the bottom bracket is rotationally connected to the front wheel bracket, and the rear part of the bottom bracket is rotationally connected with the lower part of the rear bracket;

the rear wheel support forms the first support rod, the rear support forms the second support rod, and the transverse support rods are arranged at the upper parts of the rear wheel supports on the two sides.