CN104139794B - Folding trolley - Google Patents

Abstract

The invention discloses a folding cart, wherein the cart frame includes side brackets on both sides, a strut assembly connected between the side brackets on both sides, each side bracket includes a front bracket, a rear bracket, a push Rods and connecting rods, wherein the rear bracket is rotatably connected with the front bracket, and the upper part of the rear bracket is rotatably connected with a first slider, which is slidably arranged on the push rod along the length extension direction of the push rod, and the connecting rod One end of the connecting rod is rotatably connected with the lower part of the push rod, and the other end of the connecting rod is rotatably connected to the rear bracket. on the front bracket. The strut assembly includes a front support assembly arranged between the rear support and the connecting rod, a rear support assembly arranged between the front support and the rear support, and when the cart frame is folded, the push rod, the front support and the push rod are connected by the support assembly. , the rear bracket and the push rod move closer to each other. The folding cart has a compact structure after being folded, and is easy to carry and store.

Description

foldable stroller

technical field

The invention relates to a folding cart.

Background technique

In the prior art, in order to facilitate storage and portability, children's strollers are usually foldable, which usually include a stroller frame with an unfolded position and a folded position, a wheel assembly located at the bottom of the stroller frame, and a wheel assembly located at the bottom of the stroller frame. The locking mechanism on the cart frame that locks the cart frame in the deployed position. There are many types of existing cart frames, and the number of rods is also different, and the connection relationship and connection position between the rods are different, so the folding principles and folding methods of the cart frames are also different.

Contents of the invention

The purpose of the present invention is to provide a folding cart with simple structure and simple and convenient folding operation.

In order to achieve the above object, the technical scheme adopted in the present invention is: A foldable cart, comprising a foldable cart frame, a wheel assembly arranged at the bottom of the cart frame, and a locking mechanism for locking the cart frame in an unfolded state, the cart The vehicle frame includes side brackets on both sides, and a strut assembly between the side brackets on both sides. The side brackets on each side include front brackets, rear brackets, push rods and connecting rods. The bracket is rotatably connected with the front bracket, and the upper part of the rear bracket is rotatably connected with a first sliding member, and the first sliding member is slidably provided on the push rod along the length extension direction of the push rod, One end of the connecting rod is rotatably connected to the lower part of the push rod, the other end of the connecting rod is rotatably connected to the rear bracket, and the connecting rod is also rotatably provided with a second slider, so The second sliding member is slidably provided on the front bracket along the length extension direction of the front bracket, and the brace assembly includes a front brace assembly arranged between the rear bracket and the connecting rod, and a The rear support assembly between the front support and the rear support, when the cart frame is folded, the push rod, the front support, the rear support and the The putters move closer together.

Preferably, the front bracket is rotatably connected to the rear bracket through a first shaft, the connecting rod is rotatably connected to the rear bracket through a second shaft, and the first slider is rotatably connected to the rear bracket through a third shaft. Connected to the upper part of the rear bracket, the first shaft is located between the third shaft and the second shaft on the rear bracket.

Further preferably, the connecting rod is rotatably connected to the lower part of the push rod through a fourth shaft, the second slider is rotatably connected to the connecting rod through a fifth shaft, and the fifth shaft is in the The connecting rod is located between the second shaft and the fourth shaft, and the first shaft is located above the fifth shaft on the front bracket.

Preferably, the front brace assembly includes two first braces that intersect with each other and are rotatably connected at the intersections, one end of the first brace is rotatably connected to the connecting rod on one side, and the first brace The other end of a strut is rotatably connected to the rear bracket on the other side; the rear support assembly includes two second struts that intersect each other and are rotatably connected at the intersection. One end is rotatably connected to the front bracket on one side, and the other end of the second strut is rotatably connected to the rear bracket on the other side.

Further, the length of the second strut is distributed along the vertical direction, the upper end of the second strut is rotatably connected to the upper part of the front bracket through the first connecting piece, and the lower end of the second strut is rotatably Connected to the rear bracket, the transition shaft between the front bracket and the rear bracket is located below the first connecting piece on the front bracket.

Further, the length of the first strut is distributed along the front-rear direction, and the front end of the first strut is rotatably connected to the connecting rod through a second connecting piece, and the second connecting piece is connected to the connecting rod is located in front of the second slider; the rear end of the first strut is rotatably connected to the rear bracket through a third connecting piece, and the third connecting piece is located on the rear bracket on the between the transfer shaft between the front bracket and the rear bracket, and the transfer shaft between the connecting rod and the rear bracket.

Preferably, the stroller frame further includes a footboard connected between the bottoms of the front brackets on both sides, and the footboard can be folded along the left-right direction of the stroller frame.

As a specific implementation, the footboard includes two support plates with one ends rotatably connected, and the other ends of the two support plates are respectively fixedly connected to the front brackets on both sides.

Preferably, the locking mechanism is arranged between the first slider and the push rod for locking the first slider on the push rod, or the locking mechanism is arranged on the second Between the sliding piece and the front bracket is used to lock the second sliding piece on the front bracket.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art: the folding cart of the present invention has a simple structure, and the rods on the cart frame can be moved closer to each other by pushing down the push rod. Folding, by pulling up the push rod, the rods on the cart frame can be gradually unfolded. The folding and unfolding operations are very convenient. When the cart frame is unfolded, the push rod has good rigidity, and the cart frame is folded At the same time, its structure is compact and can stand on the ground, so it is easy to carry and store.

Description of drawings

Attached picture 1 It is a perspective view of the folding cart of the present invention in an unfolded state;

Attached picture 2 It is a side view of the folding cart of the present invention in an unfolded state;

Attached picture 3 It is a rear view of the folding cart of the present invention in an unfolded state;

Attached picture 4 It is a side view of the folding cart of the present invention in a half-folded state;

Attached picture 5 It is a side view of the folding cart of the present invention in a folded state;

Attached picture 6 It is a perspective view of the folding cart of the present invention in a folded state;

in: 1 , front bracket; 2 , rear support; 3 , putter; 4 ,link; 5 , the first slider; 6 , the second sliding member; 7 , front support components; 71 , the first strut; 8 , back support components; 81 , the second strut; 9 , pedals; 91 , support plate; 10 , the first axis; 11 , the second axis; 12 , the third axis; 13 , the fourth axis; 14 , the fifth axis; 15 , the first connector; 16 , the second connector; 17 , the third connector; 18 , the fourth connector; 20 , front wheel; 30 ,rear wheel.

detailed description

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

see picture 1 ~ 6 The shown foldable cart includes a foldable cart frame, a wheel assembly arranged at the bottom of the cart frame, and a locking mechanism (not shown) for locking the cart frame in an unfolded state. The stroller frame includes side supports on both sides, and a strut assembly connected between the side supports on both sides.

Side brackets on each side including front brackets 1 , rear bracket 2 , putter 3 ,link 4 , rear bracket 2 with front bracket 1 through the first axis 10 Phase swivel connection, rear bracket 2 The upper part passes through the third axis 12 Rotationally connected with the first slider 5 , the first slider 5 along the putter 3 The length extension direction is slidably set on the push rod 3 superior. link 4 Distributed along the front-to-back direction, the connecting rod 4 rear of the second axle 11 pivotally attached to the rear bracket 2 up, connecting rod 4 front of the 4th axle 13 pivotally attached to the pushrod 3 lower part of the connecting rod 4 The middle of the fifth axis 14 rotationally connected to the second slide 6 , the second slider 6 along the front bracket 1 The length extension direction is slidably set on the front bracket 1 superior. The wheel assembly includes front brackets located on both sides 1 bottom front wheel 20 , located on both sides of the rear bracket 2 bottom rear wheel 30 .

above first axis 10 , the second axis 11 , the third axis 12 , the fourth axis 13 , the fifth axis 14 The axis lines are parallel to each other, and in the rear support 2 upper first axis 10 on the third axis 12 with the second axis 11 between the connecting rod 4 upper fifth axis 14 on the fourth axis 13 with the second axis 11 between, and in front of the bracket 1 upper first axis 10 on the fifth axis 14 above. first slider 5 , the second slider 6 All can adopt slide block, also can adopt the sliding sleeve among the present embodiment.

In this way, in the side brackets on each side, the push rod 3 ,link 4 , rear bracket 2 , and the first slider 5 The slider crank mechanism is formed between; the connecting rod 4 , front bracket 1 , rear bracket 2 and the second slider 6 Another crank-slider mechanism is formed between them. With the first slider 5 along the putter 3 slide up and down, and the second slide 6 along the front bracket 1 slide up and down, push 3 , front bracket 1 , rear bracket 2 and connecting rod 4 Can expand relatively or draw close to each other between.

The strut assembly can be deployed and folded along the left and right directions of the cart frame and is arranged between the side brackets on both sides. 2 with connecting rod 4 front strut assembly 7 and set on both sides of the front bracket 1 with rear bracket 2 back support assembly 8 . In this embodiment, the front support assembly 7 and backrest components 8 All adopt cross-bracing structure.

see picture 1 ,picture 2 ,picture 3 shown, the front support assembly 7 Comprising two first struts that intersect each other and are rotationally connected at the intersection 71 , the first strut 71 Distributed along the front-to-back direction, two first struts 71 are set as follows: the first strut 71 The front end passes through the second connector 16 connecting rod rotationally attached to one side 4 up, first strut 71 The rear end of the through the third connector 17 pivotally attached to the rear bracket on the other side 2 superior. In this embodiment, the second connector 16 in the connecting rod 4 on the fourth axis 13 with fifth axis 14 Between, the third connecting piece 17 On the rear bracket located on the second axis 11 with the first axis 10 between.

see picture 1 ,picture 2 ,picture 3 shown, rear strut assembly 8 Comprising two second struts that intersect each other and are pivotally connected at the intersection 81 , the second strut 81 The length is distributed along the up and down direction, two second struts 81 are set as follows: the second strut 81 The upper end of the first connector passes through the 15 pivotally attached to the front bracket 1 the upper part of the first connector 15 in front bracket 1 on the first axis 10 above; the second strut 81 The lower end passes through the fourth connecting piece 18 pivotally attached to the rear bracket 2 on, the fourth connector 18 in the rear bracket 2 on the second axis 11 below.

Referring to the accompanying drawings, the children's stroller also includes front brackets located on both sides 1 tread between bottom 9 , the pedal 9 It can be folded and set along the left and right directions of the cart. as shown in the picture 1 As shown, the pedal 9 Includes two support plates 91 , two support plates 91 The adjacent ends are connected by rotation, and the two support plates 91 The other end is pivotally connected to the front brackets on both sides 1 superior.

On the cart frame, the locking mechanism can be located on the first slider 5 with putter 3 between, for placing the first slide 5 lock on putter 3 on; the locking mechanism can also be provided on the second slide 6 with front bracket 1 between, for placing the second slide 6 lock on front bracket 1 In this way, the rods on the cart frame can be fixed to each other. Of course, the locking mechanism can also be arranged at other positions, as long as the rods are fixed to each other when the cart frame is unfolded.

see picture 1 to 3 As shown, when the cart frame is in the unfolded state, the locking mechanism is locked, and the connecting rod 4 Supported on the push rod in the fore-aft direction 3 , front bracket 1 , rear bracket 2 between, front support components 7 Connecting rods supported on both sides 4 with rear bracket 2 Between, back support components 8 Front brackets supported on both sides 1 with rear bracket 2 between the treads 9 Expand left and right, push the 3 by connecting rod 4 with rear bracket 2 support, which has good rigidity.

When the stroller frame needs to be folded, the locking mechanism is first unlocked so that the first slide 5 in the putter 3 Upper and second slides 6 in front bracket 1 are in an active state. see picture 4 shown, put the push rod 3 push down, push rod 3 The lower part moves down, the first slider 5 relatively along the putter 3 slide up. link 4 front end with putter 3 The lower part moves down, the connecting rod 4 relative front bracket 1 Turn and drive the second slider 6 along the front bracket 1 Slide down and drive the rear bracket 2 relative front bracket 1 Turn the bracket forward gradually 1 move closer. At the same time, the first strut 71 front end with connecting rod 4 move down, second connector 16 with the third connector 17 The distance between them gradually increases, and the two first struts 71 Rotate each other so that the front support assembly 7 Gradually fold along the left and right directions of the cart frame; the second sliding part 6 along the front bracket 1 During the slide, on the same side, the first connector 15 with the fourth connector 18 The distance between them gradually increases, and the two second struts 81 Rotate each other so that the back support assembly 8 Fold gradually along the left and right directions of the cart frame, and the back support assembly 8 The fold also drives the front bracket 1 with rear bracket 2 Relatively rotate and gradually gather along the front and rear directions; at the same time, the footboard 9 two support plates 91 Rotate each other so that the pedals 9 Fold gradually along the left and right directions of the stroller frame.

Ultimately, putt 3 , front bracket 1 , rear bracket 2 ,link 4 , front support components 7 The two first struts of 71 , back support components 8 The two second struts of 81 are close to each other, forming a 5 ,picture 6 State shown, running board 9 Front stand tucked in on both sides 1 between. The folded trolley frame has a compact structure, takes up less space, is small and light, and can rely on the pedals 9 with front wheel 20 Standing on the ground, it is easy to store and carry.

When the cart frame needs to be unfolded, pull the push rod up 3 , the first slider 5 relative putter 3 slip, putt 3 The lower part moves up to drive the connecting rod 4 The front end moves up accordingly, and the connecting rod 4 relative front bracket 1 Rotate and drive the second slider 6 along the front bracket 1 Slide up and drive the rear bracket at the same time 2 relative front bracket 1 Rotate and gradually with the front bracket 1 Spread out in the front-to-back direction. In the above process, the second connector 16 with the third connector 17 The distance between them decreases gradually, driving the two first struts 71 mutual rotation so that the front support assembly 7 Expand gradually in the left-right direction; the first connector 15 with the fourth connector 18 The distance between them decreases gradually, driving the two second struts 81 Rotate each other so that the back support assembly 8 Expand gradually in the left and right direction; tread plate 9 two support plates 91 Rotate with each other and gradually unfold along the left and right directions, until the rods of the cart frame are fully unfolded, the locking mechanism locks, forming a 1 ,picture 2 The expanded state shown.

To sum up, the folding cart of the present invention has a simple structure, and the push rod has good rigidity. The cart frame can be folded along the left and right directions and the front and rear directions. The folded structure is compact and can stand on the ground independently. The operation is very convenient.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (9)

1. A folding cart, comprising a foldable cart frame, a wheel assembly located at the bottom of the cart frame, and a locking mechanism for locking the cart frame in an unfolded state, its features In that: the cart frame includes side brackets on both sides, a strut assembly between the side brackets on both sides, and the side brackets on each side include a front bracket, a rear bracket, a push rod and The connecting rod, the rear bracket is rotatably connected with the front bracket, the upper part of the rear bracket is rotatably connected with a first slider, and the first slider is slidably arranged on the On the push rod, one end of the connecting rod is rotatably connected to the lower part of the push rod, the other end of the connecting rod is rotatably connected to the rear bracket, and the connecting rod is also rotatably provided with The second sliding piece is provided on the front bracket so as to slide along the length extension direction of the front bracket, and the strut assembly includes a connecting rod arranged between the rear bracket and the connecting rod. The front support assembly and the rear support assembly are arranged between the front support and the rear support. When the cart frame is folded, the push rod, the front support, and the The rear bracket and the push rod move closer to each other. 2. The folding cart according to claim 1, wherein the front bracket is rotatably connected to the rear bracket via a first shaft, and the connecting rod is rotatably connected to the rear bracket via a second shaft. Above, the first slider is rotatably connected to the upper part of the rear bracket through a third shaft, and the first shaft is located between the third shaft and the second shaft on the rear bracket. 3. The folding cart according to claim 2, wherein the connecting rod is rotatably connected to the lower part of the push rod through the fourth shaft, and the second sliding member is connected to the connecting rod through the fifth shaft. The rods are rotatably connected, the fifth shaft is located between the second shaft and the fourth shaft on the connecting rod, and the first shaft is located above the fifth shaft on the front bracket . 4. The folding stroller according to claim 1, wherein the front brace assembly includes two first braces that intersect each other and are rotatably connected at the intersections, one end of the first brace is rotatably connected to the connecting rod on one side, and the other end of the first strut is rotatably connected to the rear support on the other side; Two second struts, one end of the second strut is rotatably connected to the front bracket on one side, and the other end of the second strut is rotatably connected to the rear bracket on the other side . 5. The folding cart according to claim 4, characterized in that: the length of the second strut is distributed along the vertical direction, and the upper end of the second strut is rotatably connected to the front The upper part of the bracket, the lower end of the second strut is rotatably connected to the rear bracket, and the transfer shaft between the front bracket and the rear bracket is located on the first connecting piece on the front bracket below. 6. The folding cart according to claim 4, characterized in that: the length of the first strut is distributed along the front-to-back direction, and the front end of the first strut is rotatably connected to the connecting rod through a second connecting piece. On the rod, the second connecting piece is located in front of the second sliding piece on the connecting rod; the rear end of the first strut is rotatably connected to the rear bracket through the third connecting piece, so The third connecting piece is located on the rear bracket between the transition shaft between the front bracket and the rear bracket, and the transition shaft between the connecting rod and the rear bracket. 7. The foldable stroller according to claim 1, wherein the stroller frame further comprises a footboard connected between the bottoms of the front brackets on both sides, and the footboard can move along the The folding setting of the left and right directions of the vehicle frame. 8. The folding trolley according to claim 7, characterized in that: said footboard comprises two support plates with one ends rotatably connected, and the other ends of the two support plates are respectively fixedly connected to the two sides. on the front bracket. 9. The folding stroller according to claim 1, wherein the locking mechanism is arranged between the first slider and the push rod for locking the first slider on the push rod. or the locking mechanism is arranged between the second sliding piece and the front bracket for locking the second sliding piece on the front bracket.