CN106275036B - Folding trolley - Google Patents

Abstract

The invention discloses a folding trolley, the vehicle frame of which includes side brackets respectively located on the left and right sides, and a cross brace assembly connected between the side brackets on both sides, and each side bracket includes a front strut and a rear strut , the push rod and the seat post that are slidably arranged on the rear support rod along the length extension direction of the rear support rod, and the connecting rod connected between the front support rod and the rear support rod, the upper part of the front support rod and the lower part of the push rod The rear part of the seat post is pivotally connected to the rear support rod, the front part of the seat post and the front support post can be connected in a relatively rotatable and relatively sliding manner, and one end of the connecting rod is pivotally connected to the On the front strut, the other end of the connecting rod is pivotally connected to the upper part of the rear strut. When the frame is folded, on the side bracket on the same side, the push rod slides down relative to the rear strut and gradually moves closer to the rear strut. , drive the front portion of the front strut and the front portion of the seat post upwards and backwards to gradually turn over towards the push rod and the rear strut until the front strut and the seat post are close to the front side of the push rod and the rear strut.

Description

foldable stroller

technical field

The invention relates to a folding cart.

Background technique

In the prior art, there are many types of children's strollers, and their structures are also varied. The number of rods and the connection methods of the rods are different for each stroller. Correspondingly, the folding principles and folded structures of the strollers are also different. .

Contents of the invention

The object of the present invention is to provide a folding stroller with simple structure and compact structure after folding.

In order to achieve the above object, the technical solution adopted by the present invention is: a folding cart, comprising a vehicle frame in an unfolded state and a folded state, a wheel assembly arranged at the bottom of the vehicle frame, used to lock the vehicle frame in The locking mechanism in the unfolded state, the vehicle frame includes side brackets located on the left and right sides respectively, and a cross brace assembly connected between the side brackets on both sides, and the side brackets on each side include a structure that gradually goes up from front to back. a front strut extending obliquely, a rear strut extending in the up-down direction, a push rod slidably arranged on the rear strut along the length extension direction of the rear strut, a seatpost extending in the front-rear direction, and a connecting rod link between the front strut and the rear strut, the upper portion of the front strut is pivotally connected to the lower portion of the push rod, the rear portion of the seat post is pivotally connected to the On the rear support rod, the front part of the seat post is connected to the front support rod in a relatively rotatable and slidable manner, and one end of the connecting rod is pivotally connected to the front support rod, so The other end of the connecting rod is pivotally connected to the upper part of the rear support rod. When the vehicle frame is folded, on the same side of the side support, the push rod slides downward relative to the rear support rod and gradually Close to the rear support rod, drive the front part of the front support rod and the front part of the seat post upward and gradually turn backwards towards the push rod and rear support rod until the front support rod, seat post The rod is close to the front side of the push rod and the rear strut.

Preferably, a first sliding member is pivotally connected to the front support rod, and the first sliding member is provided on the seat post so as to be slidable along the length extension direction of the seat post.

Further, one end of the connecting rod is pivotally connected to the front strut through a first shaft, and the first shaft is located behind the first slider on the front strut.

Preferably, the rear support rod is fixedly provided with a second slider for providing sliding guidance for the push rod, and there is at least one second slider, and the push rod can move up and down relative to the second slider Swipe to set.

Further, the second sliding member is a second sliding sleeve slidably sleeved on the push rod, and the push rod passes through the lower end of the second sliding sleeve and the upper part of the front support rod. Phase pivot connection.

Preferably, the cross brace assembly can be expanded or folded along the left and right directions and connected between the side brackets on both sides. When the frame is folded, the cross brace assembly can be folded along the left and right directions to drive the the side brackets close together.

Further, the cross bracing assembly at least includes a bottom cross bracing assembly, and the bottom cross bracing assembly includes two bottom bracing rods that intersect each other and are pivotally connected at the intersections and extend along the front-to-back direction. The front of the bottom bracing rods The front part of the seatpost is rotatably connected to one side, and the rear part of the bottom brace is rotatably connected to the lower part of the rear strut on the other side.

Furthermore, the front part of the bottom brace is rotatably connected to the front part of the seatpost through a first adapter, and the first adapter is located between the seatpost and the seatpost on the seatpost. The front of the position where the front strut is connected.

Furthermore, the rear part of the bottom support rod is rotatably connected to the lower part of the rear support rod through a second adapter, and the second transfer member is located between the seat post and the rear support rod on the rear support rod. Below the location where the rear struts are connected.

As a specific implementation manner, the cross brace assembly further includes a rear attachment brace assembly that can be folded or unfolded along the left and right directions and arranged between the rear support bars on both sides.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art: the frame of the folding cart of the present invention has good stability in the unfolded state, and when the frame is folded, only the locking mechanism needs to be unlocked Then press the push rod down to make the push rod and the rear support gradually move closer together, so that the front support and the seat post move upward and backward toward the push rod and the rear support gradually, until the front support and the seat post move closer to the push rod. Folding of the frame is achieved when the rod is connected to the front side of the rear strut. The trolley has a small number of poles, a simple structure, and is convenient to fold. After the vehicle frame is folded, all the poles are closely connected together, the structure is compact, and the space occupied is small, which provides convenience for users' daily use.

Description of drawings

Accompanying drawing 1 is the perspective view under the expanded state of folding cart of the present invention;

Accompanying drawing 2 is the structural exploded schematic view of folding cart of the present invention;

Accompanying drawing 3 is the schematic diagram of the folding principle of the folding cart of the present invention;

Accompanying drawing 4 is the three-dimensional view that folding cart of the present invention is in folding process;

Accompanying drawing 5 is the perspective view of the foldable stroller of the present invention in a folded state;

Among them: 100, side bracket; 1, front support rod; 2, rear support rod; 3, push rod; 4, seat post; 5, first sliding part; 6, connecting rod; 7, second sliding part (second Sliding sleeve); 8. Bottom cross support assembly; 81. Bottom support rod; 82. First adapter; 83. Second adapter; 9. Rear support assembly; 11. First shaft; 12. Second Axle; 20, front wheel; 30, rear wheel.

Detailed ways

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

Referring to the folding cart shown in Fig. 1 and Fig. 2, it includes a frame with an unfolded state and a folded state, a wheel assembly at the bottom of the frame, and a locking mechanism for locking the frame in the unfolded state. The vehicle frame includes side brackets 100 respectively located on the left and right sides and a cross brace assembly connected between the side brackets 100 on both sides.

The side bracket 100 on each side includes a front strut 1, a rear strut 2, a push rod 3, a seat post 4, and a connecting rod 6. The lower part of the rod 3 is pivotally connected, and the lower part of the front strut 1 is provided with a front wheel 20; Slidably arranged on the rear strut 2; the seat post 4 extends along the front and rear direction, the rear part of the seat post 4 is pivotally connected to the lower part of the rear strut 2, the front part of the seat post 4 and the front strut 1 can be Relatively rotatable and relatively slidable; one end of the connecting rod 6 is pivotally connected to the front strut 1 , and the other end of the connecting rod 6 is pivotally connected to the upper part of the rear strut 2 .

Specifically, as shown in FIG. 1 and FIG. 2 , a first sliding member 5 is pivotally connected to the front strut 1 , and the first sliding member 5 is slidably arranged on the seat post 4 along the length extension direction of the seat post 4 . Here, the first sliding member 5 is a sliding sleeve slidably sleeved on the seat post 4 . The rear support rod 2 is fixedly provided with a second sliding member 7 for providing sliding guidance of the push rod 3, and the second sliding member 7 can be one or more, and the push rod 3 can be set up and down relative to the second sliding member 7 , so as to realize sliding up and down relative to the rear strut 2. Here, the second sliding member 7 is a second sliding sleeve that is slidably sleeved on the push rod 3, and there are two second sliding sleeves, and the two second sliding sleeves are arranged on the rear support rod 2 at intervals. , so as to provide a stable sliding guide for the push rod 3 along the length direction of the rear strut 2 , and the lower end of the push rod 3 passing through all the second sliding sleeves 7 is pivotally connected to the upper part of the front strut 1 .

One end of the link 6 is pivotally connected to the front strut 1 through a first shaft 11, which is located behind the first slider 5 on the front strut 1; the other end of the link 6 is pivotally connected to the front strut 1. It is connected to the top of the rear strut 2, and it can also be directly pivotally connected to the second sliding sleeve 7 on the top of the rear strut 2 during setting.

Referring to the drawings, the upper cross brace assembly of the folding cart can be unfolded or folded along the left and right directions and connected between the side brackets 100 on both sides, so that when the frame is folded, the cross brace assembly can be folded along the left and right directions Then, the side brackets 100 on both sides can be driven to move closer together along the left and right directions.

Specifically, on the vehicle frame, the cross brace assembly includes a bottom cross brace assembly 8 and a rear attachment brace assembly 9 . The bottom cross brace assembly 8 includes two bottom braces 81 that cross each other and are pivotally connected at the crossings and extend in the front-rear direction. Each bottom brace 81 is arranged in the following manner: the front portion of the bottom brace 81 passes The connecting part 82 is rotatably connected to the front part of the seat post 4 on one side, and the rear part of the bottom brace 81 is rotatably connected to the lower part of the rear support post 2 on the other side through the second adapter part 83 . Wherein, the first adapter 82 is located in front of the first slider 5 on the seatpost 4, the rear part of the seatpost 4 is pivotally connected to the rear strut 2 through the second shaft 12, and the second adapter 83 is on the rear The strut 2 is located below the above-mentioned second shaft 12 . The rear support assembly 9 can be folded or unfolded along the left and right directions and is arranged between the rear struts 2 on both sides. Here, the support assembly commonly used in the field with a lateral locking function is used.

When the vehicle frame is locked in the unfolded state, as shown in Figure 1, the rear support assembly 9 is deployed along the left and right directions and supported between the rear struts 2 on both sides, and the bottom cross support assembly 8 is deployed crosswise and supports the seatposts on both sides. Between the front part of 4 and the bottom of rear strut 2. On the side bracket 100 on each side, the push rod 3 stretches out relative to the rear support rod 2, and the push rod 3 and the rear support rod 2 extend approximately along the same length direction. The front support rod 1, the connecting rod 6, the rear support rod 2, the push rod 3 forms a triangular structure, and also forms a triangular structure among the seatpost 4, the front strut 1 and the rear strut 2, which makes the vehicle frame have good stability in the unfolded state.

When the frame needs to be folded, after unlocking the locking mechanism, as shown in Figure 3 and Figure 4, unlock the rear support assembly 9 upwards in the direction of arrow C, and then push the push rods 3 on both sides along the direction of arrow A direction downwards, so that the push rod 3 moves downward along the length direction of the rear strut 2 and gradually moves closer to the rear strut 2; Under the action of the rod 6, the front part of the front strut 1 and the front wheel 20 gradually turn upwards and backwards toward the push rod 3 along the direction of the arrow E; The piece 5 slides forward along the length extension direction of the seatpost 4, that is, slides forward along the direction of the arrow D in FIG. Flip, ie the front of the seatpost 4 is turned up and back towards the rear strut 2 and pushrod 3 . In the above process, when the seat post 4 is overturned, it drives the front parts of the bottom stays 81 on both sides to move upward and backward, so that the bottom stays 81 on both sides rotate relatively and gradually gather in the left and right directions, so that the side faces on both sides The brackets 100 gradually move closer along the left and right directions, that is, gradually move closer along the direction of arrow B in FIG. 3 .

Finally, as shown in Figure 5, on the side bracket 100 on the same side, the push rod 3 and the rear strut 2 are close together, and the front strut 1 and the seat post 4 are close to the front side of the rear strut 2 and the push rod 3; The side brackets 100 close together along the left and right directions, the rear support assembly 9 is folded between the side brackets 100 on both sides, and the two bottom struts 81 of the bottom cross support assembly 8 are folded together and moved closer to the front side of the seat post 4 . The folded vehicle frame has a simple and compact structure and takes up less space, which is convenient for users to carry and store.

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 (10)

1. A folding stroller, comprising a vehicle frame with an unfolded state and a folded state, a wheel assembly arranged at the bottom of the vehicle frame, a locking mechanism for locking the vehicle frame in the expanded state, the vehicle frame It includes side brackets respectively located on the left and right sides, and a cross brace assembly connected between the side brackets on both sides. A rear support rod extending in the up-down direction, a push rod slidably arranged on the rear support rod along the length extension direction of the rear support rod, a seat post extending in the front-rear direction, and a connection between the front support rod and the a link between the rear struts, the upper portion of the front strut is pivotally connected to the lower portion of the push rod, the rear portion of the seatpost is pivotally connected to the rear strut, the The front part of the seat post is connected to the front strut in a relatively rotatable and slidable manner, one end of the connecting rod is pivotally connected to the front strut, and the other end of the connecting rod pivotally attached to the upper portion of the rear strut, When the vehicle frame is folded, on the side bracket on the same side, the push rod slides downward relative to the rear support rod and gradually moves closer to the rear support rod, driving the front part of the front support rod to connect with the rear support rod. The front part of the seatpost turns upwards and backwards toward the push rod and the rear support rod gradually until the front support rod and the seat post close to the front sides of the push rod and the rear support rod. 2. The folding stroller according to claim 1, wherein a first sliding member is pivotally connected to the front support rod, and the first sliding member can slide along the length extension direction of the seatpost. set on the seat post. 3. The folding stroller according to claim 2, wherein one end of the connecting rod is pivotally connected to the front support rod through a first shaft, and the first shaft is on the front support rod. on the rear of the first slider. 4. The folding stroller according to claim 1, characterized in that: the rear support rod is fixedly provided with a second sliding member for providing sliding guidance of the push rod, and the second sliding member has at least one , the push rod can be arranged to slide up and down relative to the second sliding member. 5. The folding cart according to claim 4, wherein the second sliding member is a second sliding sleeve slidably sleeved on the push rod, and the push rod passes through the first push rod. The lower ends of the two sliding sleeves are pivotally connected to the upper part of the front strut. 6. The folding cart according to any one of claims 1 to 5, characterized in that: the cross brace assembly can be unfolded or folded along the left and right directions and connected between the side brackets on both sides, the cart When the frame is folded, the cross brace assembly is folded along the left and right directions to drive the side brackets on both sides to move closer together. 7. The foldable stroller according to claim 6, wherein the cross brace assembly includes at least a bottom cross brace assembly, and the bottom cross brace assembly includes cross braces that intersect each other and are pivotally connected at intersections along the front-to-rear direction. Extended two bottom stays, the front of the bottom stay is pivotally connected to the front of the seat post on one side, and the rear of the bottom stay is pivotally connected to the rear stay on the other side on the lower part. 8. The folding stroller according to claim 7, characterized in that: the front part of the bottom brace is rotatably connected with the front part of the seat post through a first adapter, and the first adapter Located on the seat post in front of where the seat post connects to the front strut. 9. The folding stroller according to claim 7, characterized in that: the rear part of the bottom support bar is rotatably connected to the lower part of the rear support bar through a second adapter piece, and the second adapter piece It is located below the position where the seat post is connected to the rear support post on the rear support post. 10 . The foldable stroller according to claim 7 , wherein the cross brace assembly further includes a rear support assembly arranged between the rear support rods on both sides so as to be foldable or unfoldable along the left and right directions. 11 .