CN106697031A - Folding cart - Google Patents

Abstract

The invention discloses a folding cart, comprising a cart frame in an unfolding state and a folding state; the cart comprises a push rod, a front wheel bracket, a front wheel installed at the lower part of the front wheel bracket, a back wheel bracket and a back wheel installed at the lower part of the back wheel bracket; the push rod is relatively and glidingly connected with the front wheel bracket; the back wheel bracket comprises an upper back wheel bracket and a lower back wheel bracket which are rotationally connected to each other; the upper back wheel bracket is rotationally connected with the push rod; the cart frame further comprises a side supporting rod, and two ends of the side supporting rod are respectively and rotationally connected with the front wheel bracket and the lower back wheel bracket. The folding cart is convenient to fold and unfold, the floor volume after folding is small, the cart can be stand independently, and is wide in application scale.

Description

a folding cart

technical field

The invention relates to the technical field of carts, in particular to a folding cart.

Background technique

With the continuous improvement of people's living standards, carts are widely used in people's daily life, such as children's carts, supermarket shopping carts, and carts used by students to replace schoolbags. The styles of existing carts are also more and more diverse. Considering factors such as taking up space and whether it is convenient to carry, most carts are designed to be foldable. However, the existing collapsible carts are still large in volume after being folded, unable to stand on their own, and have a relatively complicated structure. The operation of unfolding and folding has certain complexity and difficulty, and it is inconvenient to use.

Contents of the invention

In view of this, in order to overcome the defects of the prior art, the object of the present invention is to provide a foldable cart which is easy to operate and small in volume after folding.

In order to achieve the above object, the present invention adopts the following technical solutions:

A kind of foldable trolley, comprises the trolley frame that has unfolded state and folded state, and described cart frame comprises push rod, front wheel bracket, the front wheel that is installed in the lower part of described front wheel bracket, rear wheel bracket and installation For the rear wheel at the bottom of the rear wheel bracket, the push rod is connected to the front wheel bracket by sliding fit; the rear wheel bracket includes an upper rear wheel bracket and a lower rear wheel bracket that are rotatably connected, and the upper rear wheel bracket The wheel bracket is rotatably connected to the push rod; the cart frame also includes side struts, and the two ends of the side struts are respectively rotatably connected to the front wheel bracket and the lower rear wheel bracket .

Preferably, when the foldable stroller is in the unfolded state, the lower end of the push rod is located on the upper part of the front wheel bracket, and the front wheel bracket is relatively opened from the side brace, and the The upper rear wheel bracket is relatively opened from the lower rear wheel bracket; when the folding cart is in the folded state, the lower end of the push rod extends downward beyond the lower part of the front wheel bracket, and the The front wheel support is relatively close to the side strut, and the lower rear wheel support is relatively close to the upper rear wheel support.

Preferably, one of the front wheel bracket and the push rod is provided with a sliding slot extending along its own length direction, and the other is provided with a sliding block slidingly fitted with the sliding slot.

Preferably, the push rod at least includes an upper push rod and a lower push rod that are rotatably connected, and the lower push rod is connected with the front wheel bracket in a relative sliding fit, and the foldable cart is in the unfolded state , the upper push rod opens relative to the lower push rod and extends toward the top of the cart frame; when the foldable cart is in the folded state, the upper push rod relative to the lower push rod The push rods are close together and extend towards the bottom of the cart frame.

More preferably, the upper push rod and the lower push rod are rotatably connected through a push rod rotation joint.

Further preferably, the upper end of the upper rear wheel bracket is rotatably connected to the push rod rotation joint through the rear wheel bracket connection shaft.

Preferably, the upper rear wheel bracket and the lower rear wheel bracket are rotatably connected through a rear wheel bracket rotation joint.

Preferably, the upper end of the side strut is rotatably connected to the upper end of the front wheel bracket through the front wheel bracket rotation joint; part, the lower end of the side brace is rotatably connected to the connecting part.

Preferably, the folding stroller further includes a seat post, the front end of the seat post is rotatably connected to the lower end of the push rod, and the rear end of the seat post is rotatably connected to the side stay superior. When the folding cart is in the folded state, the front end of the seat post and/or the lower end of the push rod are supported on the ground.

More preferably, the seat post includes a front section of the seat post and a rear section of the seat post that are integrally bent, the end of the front section of the seat post is rotatably connected to the lower end of the push rod, and the rear section of the seat post The end is rotatably connected with the side struts; when the foldable cart is in the unfolded state, the front section of the seat post is relatively opened from the push rod, and the foldable cart is in the In the folded state, the front section of the seat post is relatively close to the push rod, and is jointly supported by the end of the front section of the seat post and/or the lower end of the push rod and the front wheel, so that the stroller in the folded state can maintain self-support.

The folding principle of the folding stroller of the present invention is as follows: the push rod slides down along the front wheel bracket, and the upper end of the upper rear wheel bracket connected with the push rod will move forward; The lower rear wheel bracket connected by the side strut through the connecting piece turns forward around the rotation joint of the rear wheel bracket, and the upper rear wheel bracket closes to the side strut. The folding principle is simple and the operation is convenient; after folding, the lower end of the push rod is downward Extending beyond the lower part of the front wheel bracket, the front wheel bracket is relatively close to the side strut, the lower rear wheel bracket is relatively close to the upper rear wheel bracket, the front wheel is in the angle formed by the front wheel bracket and the upper rear wheel bracket, and the rear wheel Located above the front wheels, it occupies a small area.

Compared with the prior art, the present invention is beneficial in that the folding and unfolding operation of the folding cart provided by the present invention is convenient, the folded cart occupies a small volume, can stand on its own, and has a wide range of applications.

Description of drawings

Fig. 1 is a side view of a folding cart of the present invention in an unfolded state;

Fig. 2 is a three-dimensional schematic diagram of a folding cart of the present invention in an unfolded state;

Fig. 3 is a side view during the folding process of a folding cart of the present invention;

Fig. 4 is a three-dimensional schematic diagram during the folding process of a folding cart of the present invention;

Fig. 5 is a side view of a folding cart of the present invention in a folded state;

Fig. 6 is a three-dimensional schematic diagram of a folding cart of the present invention in a folded state;

In the attached picture:

1-upper push rod, 2-lower push rod, 3-front wheel bracket, 4-side stay, 5-seat post, 51-seat post front section, 52-seat post rear section, 6-upper rear wheel support, 7 -Lower rear wheel bracket, 8-push rod swivel joint, 9-front wheel bracket swivel joint, 10-lower push rod link shaft, 11-seat post link shaft, 12-side strut link shaft, 13-rear wheel bracket link Joint, 14-rear wheel support rotating shaft, 15-front wheel support connecting rod, 16-front wheel, 17-rear wheel, 18-connecting piece.

detailed description

Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to Figures 1 to 2, a folding cart of the present invention includes a cart frame with an unfolded state and a folded state, which includes push rods, side stays 4, seat posts 5, front wheel brackets 3, mounted on the front The front wheel 16 of wheel support 3 bottoms, trailing wheel support and the trailing wheel 17 that is installed in the rear wheel support bottom. When the folding stroller is in the unfolded state, the lower end of the push rod is positioned on the top of the front wheel bracket 3, the front wheel bracket 3 is relatively opened with the side strut 4, and the upper rear wheel bracket 6 is relatively opened with the lower rear wheel bracket 7; When the cart was in the folded state, the lower end of the push rod extended downward beyond the bottom of the front wheel bracket 3, the front wheel bracket 3 was relatively close to the side strut 4, and the lower rear wheel bracket 7 was relatively close to the upper rear wheel bracket 6.

One of the front wheel bracket 3 and the push rod is provided with a chute extending along its own length direction, and the other is provided with a slide block slidably matched with the chute. The push rod at least includes two parts, the upper push rod and the lower push rod, which are rotatably connected. In this embodiment, the preferred push rod includes two parts, the upper push rod 1 and the lower push rod 2. The parts are connected by push rod rotary joint 8. The lower push rod 2 is connected with the front wheel bracket 3 in relative sliding fit. When the folding cart is in the unfolded state, the upper push rod 1 is opened relative to the lower push rod 2 and extends toward the top of the cart frame, as shown in Figures 1 and 2; when the folding cart is in the folded state, the upper push rod 1 is relatively The lower push rods 2 are brought together and extend toward the bottom of the cart frame, as shown in FIGS. 5 and 6 .

The rear wheel support at least includes two parts, the upper rear wheel support and the lower rear wheel support. In this embodiment, the preferred rear wheel support includes two parts, the upper rear wheel support 6 and the lower rear wheel support 7. As shown in Figure 2, in the present embodiment, the upper rear wheel bracket 6 and the lower rear wheel bracket 7 are "U"-shaped structures respectively, and the openings of the two "U"-shaped structures are opposite, and the upper rear wheel bracket 6 and the lower rear wheel bracket 7 are connected by the rear wheel support swivel joint 13. The upper end of the upper rear wheel support 6 is connected to the push rod rotary joint 8 through the rear wheel support connecting shaft 14, and the bottom of the lower rear wheel support 7 is provided with a connecting piece protruding towards the front wheel support 3, which is preferably connected in this embodiment. Part is connecting piece 18.

The upper end of the side stay 4 is rotatably connected with the upper end of the front wheel support 3 through the front wheel support revolving joint 9 , and the lower end of the side stay 4 is rotatably connected with the connecting piece 18 through the side stay link rotating shaft 12 .

The front end of the seat post 5 is rotatably connected with the lower end of the push rod through the lower push rod link shaft 10 , and the rear end of the seat post 5 is rotatably connected with the lower middle part of the side stay 4 through the seat post link shaft 11 . In this embodiment, the preferred seat post 5 includes a front section 51 of the seat post formed by integral bending, a rear section 52 of the seat post and a connecting rod connecting the rear section 52 of the seat post. The lower end of the rod is rotatably connected, and the end of the seat post rear section 52 is rotatably connected with the lower middle part of the side stay 4 through the seat post link shaft 11 . When the folding cart is in the unfolded state, the front section 51 of the seat post is relatively open to the push rod, and when the folding cart is in the folded state, the front section 51 of the seat post is relatively close together with the push rod.

The lower end of the front wheel bracket 3 is connected by a front wheel bracket connecting rod 15 . The front wheel 16 is connected with the lower end of the front wheel bracket 3 through conventional settings in the field, and the rear wheel 17 is connected with the lower end of the lower rear wheel bracket 7 through conventional settings in the field. In this embodiment, the preferred rotating shaft is a pin.

A folding cart of the present invention has a cart frame in an unfolded state and a folded state. When the foldable cart is in the unfolded state, the extension directions of the upper push rod 1 and the lower push rod 2 are on the same straight line, and The extension lines of the front wheel bracket 3 are parallel, the lower end of the lower push rod 2 is positioned at the top of the front wheel bracket 3, the front wheel bracket 3 and the side strut 4 are relatively opened, and the upper rear wheel bracket 6 and the lower rear wheel bracket 7 themselves The length extension direction is on the same straight line, the front section 51 of the seat post is relatively open to the push rod, and a locking device is installed on the front wheel 16 and/or the rear wheel 17, as shown in Fig. 1 and Fig. 2 .

In the process of changing the folding cart from the unfolded state shown in Figure 1 and Figure 2 to the folded state shown in Figure 5 and Figure 6, first push the upper push rod 1 downward along its extension direction to push the push down Rod 2 slides down along front wheel support 3, and the upper end of upper rear wheel support 6 that is connected with lower push rod 2 can move forward, and simultaneously, the end of seat post front end 51 that is connected with lower push rod 2 can move downward, Drive the side struts 4 to close together with the front wheel brackets 3, the lower rear wheel brackets 7 connected with the side struts 4 through the connecting piece 18 turn forward around the rear wheel bracket swivel joints 13, and the upper rear wheel brackets 6 turn toward the side struts 4 Close together, and then turn the upper end of the push rod 1 forward, as shown in Figure 3 and Figure 4.

When the folding cart completes the above actions, the folding cart is in the folded state. At this time, the upper push rod 1 is closed relative to the lower push rod 2 and extends toward the bottom of the cart frame. Relatively close together, the lower rear wheel support 7 and the upper rear wheel support 6 are relatively close together, and the seat post front section 51 is relatively close together with the push rod, as shown in Figure 5 and Figure 6 . At this time, the pushcart in the folded state can be kept self-supporting through the joint support of the end of the seat post front section 51 and the front wheel 16 . In some other embodiments, when the stroller is in the folded state, the lower end of the lower push rod 2 and the front wheel 16 can also be jointly supported to keep the stroller self-supporting.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention. Equivalent changes or modifications made in the spirit shall fall within the protection scope of the present invention.

Claims (10)

1. a kind of Folding trolley, including the stroller frame with deployed condition and folded state, the stroller frame include push rod, Front-wheel support, the front-wheel installed in the front-wheel support bottom, rear wheel support and the trailing wheel installed in the rear wheel support bottom, It is characterized in that：Push rod sliding connection relative with the front-wheel support；The rear wheel support includes the connection that rotates Upper rear wheel support and lower rear wheel support, the upper rear wheel support rotates with the push rod and is connected；The stroller frame is also wrapped Side brace is included, the two ends end of the side brace rotates and be connected with the front-wheel support and the lower rear wheel support respectively.

2. Folding trolley according to claim 1, it is characterised in that：Described Folding trolley is in described deployed condition When, in the top of the front-wheel support, the front-wheel support is relative with the side brace to be opened the lower end part of the push rod, institute State that rear wheel support is relative with the lower rear wheel support to be opened；It is described when described Folding trolley is in described folded state The bottom of push rod is extended downwardly beyond the bottom of the front-wheel support, and the front-wheel support is relative with the side brace to be closed up, Described lower rear wheel support is relative with described upper rear wheel support to be closed up.

3. Folding trolley according to claim 1, it is characterised in that：One of them of the front-wheel support and the push rod The chute extended along its own length direction is offered, another is provided with the sliding block being slidingly fitted with the chute.

4. Folding trolley according to claim 1, it is characterised in that：Described push rod at least includes the upper of connection that rotate Push rod and lower push-rod, lower push-rod sliding connection relative with the front-wheel support, described Folding trolley is in described Deployed condition when, the relatively described lower push-rod of the upper push-rod open and towards the stroller frame top extend；Described folding When folded go-cart is in described folded state, the relatively described lower push-rod of the upper push-rod closes up and towards the lower section of the stroller frame Extend.

5. Folding trolley according to claim 4, it is characterised in that：The upper push-rod and described lower push-rod pass through push rod Rotary joint rotates connection.

6. Folding trolley according to claim 5, it is characterised in that：The upper end of the upper rear wheel support is by trailing wheel branch Frame connection rotating shaft is rotatably connected on described push rod rotary joint.

7. the Folding trolley according to claim 1,2 or 6, it is characterised in that：Described upper rear wheel support and it is described under Rear wheel support is rotated connection by rear wheel support rotary joint.

8. Folding trolley according to claim 1, it is characterised in that：Revolved by front-wheel support the upper end of the side brace Turn joint and rotated with the upper end of the front-wheel support to be connected；The bottom of the lower rear wheel support is provided with one towards before described The connector that wheel support stretches out, the bottom of the side brace rotates with described connector and is connected.

9. Folding trolley according to claim 1, it is characterised in that：Described Folding trolley also includes seat bar, the seat The leading section of bar rotates with the bottom of the push rod and is connected, and the rearward end of the seat bar is rotatably connected on described side brace On.

10. Folding trolley according to claim 9, it is characterised in that：The seat bar includes the seat bar that one bending is formed Leading portion and seat bar back segment, the end of the seat bar leading portion rotate with the bottom of the push rod and are connected, the seat bar back segment End rotates with the side brace and is connected；When described Folding trolley is in described deployed condition, described seat bar leading portion Relative with the push rod to open, when described Folding trolley is in described folded state, described seat bar leading portion is pushed away with described Bar is relative to be closed up.