CN204368228U - Folding trolley - Google Patents

Abstract

The utility model discloses a folding cart, wherein the cart frame includes a front wheel bracket, a rear wheel bracket, a push rod, a sliding part, a seat post and a pull rod, the upper part of the rear wheel bracket is pivotally connected to the push rod; the front wheel The rear of the bracket is pivotally connected to the rear wheel bracket; the slider is set on the rear wheel bracket to slide up and down; the front end of the seat post is pivotally connected to the push rod, and the rear end is pivotally connected to the slider; one end of the tie rod is pivotally connected On the slider, the other end is pivotally attached to the front wheel bracket. When the cart frame is in the expanded state, a triangular structure is formed between the rear wheel bracket, the push rod and the seat post, the front wheel bracket, the rear wheel bracket and the pull rod, so that the cart frame has a Strong rigidity and good stability. The foldable cart has a simple structure, a small number of rods, a simple and elegant appearance, convenient and easy unfolding and folding operations of the cart frame, and the folded cart frame has a compact structure, takes up little space, and is easy to carry and store.

Description

foldable stroller

technical field

The utility model relates to a folding cart.

Background technique

The children's stroller in the prior art includes a stroller frame with an unfolded position and a folded position, a front wheel assembly and a rear wheel assembly arranged at the bottom of the stroller frame, and is used to lock the stroller frame in the unfolded state the locking mechanism. There are many kinds of existing children's strollers, the number of rods of the stroller frame is different, and the connection positions between the rods are different, so the folding principles and folding methods are different, and some children's strollers have more rods , poor structural rigidity and stability.

Contents of the invention

The purpose of the utility model is to provide a folding cart which is simple in structure, less in number of rods, strong in rigidity, high in stability, and convenient in folding and unfolding.

For achieving the above object, the technical scheme that the utility model adopts is:

A foldable stroller, comprising a stroller frame with an expanded state and a folded state, a front wheel assembly arranged at the front bottom of the cart frame, and a rear wheel assembly arranged at the bottom rear of the cart frame . A locking mechanism for locking the cart frame in an unfolded state, the cart frame comprising:

a front wheel bracket, the front wheel bracket extends from front to rear, and the front wheel assembly is installed on the front part of the front wheel bracket;

a rear wheel bracket, the rear of the front wheel bracket is pivotally connected to the rear wheel bracket, and the rear wheel assembly is mounted on the lower part of the rear wheel bracket;

a push rod, the upper pivot of the rear wheel bracket is connected to the push rod;

a sliding piece, the sliding piece is arranged on the rear wheel support to slide up and down along the length direction of the rear wheel support;

a seat post extending in a fore-aft direction, the front portion of the seat post being pivotally connected to the lower portion of the push rod, and the rear portion of the seat post being pivotally connected to the slider;

a pull rod, one end of the pull rod is pivotally connected to the slider, and the other end of the pull rod is pivotally connected to the front wheel bracket,

When the cart frame is unfolded, a triangular structure is formed between the front wheel bracket, the rear wheel bracket and the pull rod, and another triangle structure is formed between the rear wheel bracket, the seat post and the push rod. A triangular structure; when the stroller frame is folded, the push rod turns backward and the rear wheel support turns forward, the front wheel assembly and the rear wheel assembly are far away from each other along the front-to-back direction, and the push rod , the rear wheel bracket, the seat post, the tie rod and the front wheel bracket are close to each other along the height direction.

Preferably, the rear portion of the front wheel bracket is pivotally connected to the rear wheel bracket via a first shaft, and the slider is located above the first shaft on the rear wheel bracket.

Further, the rear wheel bracket is fixed with a connecting piece protruding forward, and the rear part of the front wheel bracket is pivotally connected to the connecting piece through the first shaft.

Preferably, a seat bracket for grafting a child's seat is fixed on the push rod, the front part of the seat post is pivotally connected to the lower part of the push rod through a second shaft, and the seat bracket A frame is positioned above the second shaft on the push rod.

Further, the upper pivot of the rear wheel bracket is connected to the seat bracket.

Further, the rear part of the seat post is pivotally connected to the sliding part through a third shaft, and the upper part of the pull rod is pivotally connected to the sliding part through a fourth shaft, and the third shaft is pivotally connected to the sliding part through a fourth shaft. The slider is located above the fourth shaft.

Preferably, the rear wheel bracket includes rear struts respectively located on the left and right sides, and a cross bar connected between the lower parts of the rear struts on both sides, and the front wheel bracket is U-shaped with the opening facing backward, so The rear ends on both sides of the front wheel support are respectively pivotally connected to the rear support rods on both sides.

Further, the sliding member is a sliding sleeve that slides up and down on the rear support rod.

Further, the push rod is U-shaped with the opening facing downward, and the upper parts of the rear support rods on both sides are respectively pivotally connected to both sides of the push rod.

Preferably, the locking mechanism is provided between the slider and the rear wheel bracket for locking the two.

Due to the application of the above-mentioned technical solution, the utility model has the following advantages compared with the prior art: the utility model folding cart, wherein the rear wheel bracket of the cart frame, between the push rod and the seat post, as well as between the front wheel bracket and the rear A triangular structure is formed between the wheel bracket and the tie rods, so that the cart frame has strong rigidity and good stability. The folding cart has a simple structure and a small number of rods. The unfolding and folding operations of the cart frame Convenient and easy to move, the folded stroller frame has a compact structure, takes up little space, and is easy to carry and store.

Description of drawings

Accompanying drawing 1 is the perspective view of the folding cart of the present utility model in the unfolded state;

Accompanying drawing 2 is the side view of the foldable trolley of the present invention in the unfolded state;

Accompanying drawing 3 is the side view of the practical folding cart in the half-folded state;

Accompanying drawing 4 is the side view of the folding cart of the present invention in the folded state.

Among them: 1. Front wheel bracket; 11. Front wheel connecting rod; 2. Rear wheel bracket; 21. Rear support rod; 22. Cross bar; 23. Connecting piece; 3. Push rod; 31. Seat bracket; 4 , sliding part; 5, seat post; 6, tie rod; 7, first shaft; 8, second shaft; 9, third shaft; 10, fourth shaft; 70, front wheel assembly; 80, rear wheel assembly.

Detailed ways

The technical solution of the present utility model will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

Referring to the folding cart shown in Figures 1 to 4, it includes a cart frame with an unfolded state and a folded state, a front wheel assembly 70 located at the bottom front of the cart frame, and a front wheel assembly 70 located at the bottom rear of the cart frame. The rear wheel assembly 80 and the locking mechanism for locking the stroller frame in the unfolded state.

The stroller frame includes a front wheel bracket 1, a rear wheel bracket 2, a push rod 3, a slider 4, a seat post 5 and a pull rod 6. The front wheel bracket 1 is gradually tilted up from front to back, and the front wheel assembly 70 is installed on the front wheel. The front part of the bracket 1, the rear part of the front wheel bracket 1 is pivotally connected to the rear wheel bracket 2; ; The sliding part 4 is arranged on the rear wheel bracket 2 to slide up and down along the length direction of the rear wheel bracket 2; the seat post 5 extends along the front and rear direction, and the front end pivot of the seat post 5 is connected to the bottom of the push rod 3, and the rear end pivot The shaft is connected to the slider 4; one end of the pull rod 6 is pivotally connected to the slider 4, and the other end is pivotally connected to the front wheel bracket 3. Like this, a slider crank mechanism is formed between the push rod 3, the rear wheel bracket 2, the slider 4 and the seat post 5, and a slider crank mechanism is also formed between the rear wheel bracket 2, the front wheel bracket 1, the slider 4 and the pull rod 6. block mechanism.

In this embodiment, the rear wheel bracket 2 is fixedly provided with a connecting piece 23 protruding forward, the rear portion of the front wheel bracket 1 is pivotally connected to the connecting piece 23 through the first shaft 7, and the sliding piece 4 is mounted on the rear wheel bracket. 2 is located above the first shaft 7; the push rod 3 is fixed with a seat bracket 31 for grafting a child seat, and the front part of the seat post 5 is pivotally connected to the lower part of the push rod 3 through the second shaft 8 , the seat bracket 31 is located above the second shaft 8 on the push rod 3, the upper part of the rear wheel bracket 2 is pivotally connected to the seat bracket 31; the rear part of the seat post 5 is pivotally connected to the third shaft 9 On the slider 4 , the upper part of the pull rod 6 is pivotally connected to the slider 4 through a fourth shaft 10 , and the third shaft 9 is located above the fourth shaft 10 on the slider 4 .

Referring to the accompanying drawings, in this embodiment, the rear wheel bracket 2 includes rear struts 21 respectively located on the left and right sides, and a cross bar 22 connected between the lower parts of the rear struts 21 on both sides; the front wheel bracket 1 is U-shaped with the opening facing the rear, the rear ends on both sides of the front wheel bracket 1 are respectively pivotally connected to the rear struts 21 on both sides, and the lower part of the front end of the front wheel bracket 1 is fixedly provided with a front wheel connection for connecting the front wheel assembly 70 Rod 11; the push rod 3 is U-shaped with the opening facing downwards, and the upper ends of the rear support rods 21 on both sides are pivotally connected to both sides of the push rod 3; 21 on the sliding sleeve.

When the cart frame is unfolded, the slider crank mechanism formed between the push rod 3, the rear wheel bracket 2, the slider 4 and the seat post 5 is locked, or the rear wheel bracket 2, the front wheel bracket 1, the slider 4 And the slider crank mechanism that forms between pull bar 6 locks, just can all lock these two slider crank mechanisms, and then can lock the cart vehicle frame. In this embodiment, the locking mechanism is disposed between the rear wheel bracket 2 and the slider 4 for locking the slider 4 on the rear wheel bracket 2 , that is, locking the sliding sleeves on both sides to the corresponding rear struts 21 . When the locking mechanism is locked, the above two slider crank mechanisms are locked so that the rods of the cart frame are relatively fixed.

When the stroller frame is in the unfolded position, as shown in Figures 1 and 2, the locking mechanism is locked, the front wheel assembly 70 and the rear wheel assembly 80 are supported on the ground, and the rear wheel bracket 2, the push rod 3 and the seat post 5 A triangular structure is formed between the front wheel bracket 1, the rear wheel bracket 2 and the tie rod 6, and another triangular structure is formed between the front wheel bracket 1, the rear wheel bracket 2 and the tie rod 6. The cart frame is stably in the unfolded state, and the cart frame has a good rigidity. In this unfolded state, the foldable stroller can be used as an ordinary stroller by relying on the seat post 5 to form a seat, and it can also be used for sitting and standing on a high seat by grafting the seat bracket 31 to a child's seat, which is very convenient to use. The shape in the unfolded state is also very simple and stylish.

When the stroller frame needs to be folded up, as shown in Figure 3, first unlock the locking mechanism, press down on the rear of the push rod 3, the push rod 3 turns backward relative to the rear wheel bracket 2, and the push rod 3 drives the seatpost 5. Drive the slider 4 to slide upward along the rear wheel bracket 2, and the slider 4 slides upward along the rear wheel bracket 2 to drive the pull rod 6, so that the rear wheel bracket 2 is turned forward relative to the front wheel bracket 1, which makes the push rod 3, seat The rod 5, the rear wheel bracket 2, the tie rod 6 and the front wheel bracket 1 gradually move closer together along the height direction, and the front wheel assembly 70 and the rear wheel assembly 80 gradually move away from each other along the front and rear directions, finally forming a state as shown in Figure 4. All the rods on the frame are closely connected together. The folded trolley frame has a very compact structure, takes up little space, and is convenient for storage and carrying.

When the cart frame needs to be expanded and used, the push rod 3 is pulled up to pull the rear wheel bracket 2 and the seat post 5 to overturn, and the slider 4 slides down gradually along the rear wheel bracket 2, so that each part of the cart frame The rods are gradually extended until the cart frame is fully extended and the locking mechanism locks.

To sum up, the folding cart of the present invention, when the cart frame is in the unfolded state, between the rear wheel bracket 2, the push rod 3 and the seat post 5, the front wheel bracket 1, the rear wheel bracket 2 and the tie rod 6 A triangular structure is formed respectively, so that the cart frame has strong rigidity and good stability in the unfolded state. The foldable stroller can be used as an ordinary stroller, and can also be used by grafting a child seat through the seat bracket 31 . The foldable cart has a simple structure, a small number of rods, a simple and elegant appearance, convenient and easy unfolding and folding operations of the cart frame, and the folded cart frame has a compact structure, takes up little space, and is easy to carry and store.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (10)

1. a Folding trolley, comprise the stroller frame with deployed condition and folded state, the front component being located at front portion at the bottom of described stroller frame, be located at rear portion at the bottom of described stroller frame wheel assembly, for by described stroller frame locking lockout mechanism in the deployed state, it is characterized in that, described stroller frame comprises:

Front-wheel support, described front-wheel support extends from front to back, and described front component is installed on the front portion of described front-wheel support;

Rear wheel support, the back pivot of described front-wheel support is connected on described rear wheel support, and described wheel assembly is installed on the bottom of described rear wheel support;

Push rod, the upper pivot of described rear wheel support is connected on described push rod;

Sliding part, described sliding part slides up and down to be located on described rear wheel support along the length direction of described rear wheel support;

Seat bar, described seat bar extends along the longitudinal direction, and the front portion of described seat bar is connected with the bottom phase pivot of described push rod, and the back pivot of described seat bar is connected on described sliding part;

Pull bar, the provided at one of described pull bar is connected on described sliding part, and the other end of described pull bar is pivotally connected on described front-wheel support,

When described stroller frame is launched, form triangular structure between described front-wheel support, described rear wheel support and described pull bar, between described rear wheel support, described seat bar and described push rod, form another triangular structure; When described stroller frame folds, turn over after described push rod and turn over before described rear wheel support, described front component and described wheel assembly along the longitudinal direction away from, described push rod, rear wheel support, seat bar, pull bar and front-wheel support are drawn close mutually along short transverse.

2. Folding trolley according to claim 1, is characterized in that: the rear portion of described front-wheel support is pivotally connected on described rear wheel support by the first axle, and described sliding part in the rear wheel support is positioned at the top of described first axle.

3. Folding trolley according to claim 2, is characterized in that: described rear wheel support is installed with the attaching parts stretched out forward, and the rear portion of described front-wheel support is pivotally connected on described attaching parts by described first axle.

4. Folding trolley according to claim 1, it is characterized in that: described push rod is installed with the seat pocket care frame for grafting baby seat pocket, the front portion of described seat bar is connected with the bottom phase pivot of described push rod by the second axle, and described seat pocket care frame is positioned at above described second axle on described push rod.

5. Folding trolley according to claim 4, is characterized in that: the upper pivot of described rear wheel support is connected on described seat pocket care frame.

6. Folding trolley according to claim 4, it is characterized in that: the rear portion of described seat bar is pivotally connected on described sliding part by the 3rd axle, the top of described pull bar is pivotally connected on described sliding part by the 4th axle, and described 3rd axle is positioned at above described 4th axle on described sliding part.

7. Folding trolley according to claim 1, it is characterized in that: described rear wheel support comprise lay respectively at the left and right sides back stay, be connected to the cross bar between back stay bottom described in both sides, described front-wheel support is opening U-shaped backwards, and the rear end, both sides of described front-wheel support is pivotally connected on the described back stay of both sides respectively.

8. Folding trolley according to claim 7, is characterized in that: described sliding part is slide up and down to be set in the sliding sleeve on described back stay.

9. Folding trolley according to claim 7, is characterized in that: described push rod is downward opening U-shaped, and the top of the described back stay of both sides is pivotally connected in the both sides of described push rod respectively.

10. Folding trolley according to claim 1, is characterized in that: described lockout mechanism is located between described sliding part and described rear wheel support for both being locked.