CN214296007U - Shallow - Google Patents

Abstract

The utility model relates to a cart, including main frame, front wheel support, rear wheel support, front wheel and rear wheel. Wherein, in the open state, the main frame comprises a lower frame rod, and the lower frame rod extends along the front-back direction; the front end part of the upper frame rod is rotatably connected with the front end part of the lower frame rod through a first pivot; the upper end part of the upper rear rod is rotatably connected with the rear end part of the upper frame rod through a second pivot; the upper end part of the lower rear rod is rotatably connected with the lower end part of the upper rear rod through a third pivot, and the lower end part of the lower rear rod is rotatably connected with the rear end part of the lower frame rod through a fourth pivot; the connecting line between the third pivot and the second pivot and the connecting line between the third pivot and the fourth pivot form an outer angle of more than 180 degrees on the outer side of the main frame. The utility model discloses a main frame structure to the shallow improves for folding of shallow is more simple convenient, and the more safe and stable of open mode.

Description

Shallow

Technical Field

The utility model relates to a shallow, concretely relates to shallow that can fold.

Background

The prior art carts are foldable in some cases and not foldable in some cases. The non-foldable cart occupies a large space in a non-use state and is not convenient to store; in the foldable cart, most of the folding mechanisms are complex in structure and inconvenient to operate. As disclosed in CN111204368A, the foldable frame of the stroller is complex; in contrast, in the passenger transport vehicle disclosed in CN207826322U, although the frame structure is simple, the outer angle formed by the lower rear frame part and the upper rear frame part of the frame is less than 180 degrees in the unfolded in-use position, and in the unfolded state, when the locking part fails, the frame is prone to be folded accidentally into the frame, which is a safety hazard.

Disclosure of Invention

The utility model aims at providing a collapsible shallow of open condition stability.

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

the utility model provides a cart, including the main frame that has open mode and fold condition, connect front wheel support on the main frame, connect rear wheel support on the main frame, set up in front wheel support on the front wheel, set up in the rear wheel support on the rear wheel, wherein, under the open mode, the main frame include

The lower frame rod extends along the front-back direction;

the front end part of the upper frame rod is rotatably connected with the front end part of the lower frame rod through a first pivot;

the upper end part of the upper rear rod is rotatably connected with the rear end part of the upper frame rod through a second pivot;

the upper end part of the lower rear rod is rotatably connected with the lower end part of the upper rear rod through a third pivot, and the lower end part of the lower rear rod is rotatably connected with the rear end part of the lower frame rod through a fourth pivot;

the connecting line between the third pivot and the second pivot and the connecting line between the third pivot and the fourth pivot form an external angle of more than 180 degrees on the outer side of the main frame, so that the main frame can not be folded into the main frame accidentally in an unlocked and opened state.

And a locking device can be arranged at the position of the third pivot, and can lock and fix the relative positions of the upper rear rod and the lower rear rod so as to prevent the upper rear rod and the lower rear rod from being folded inwards accidentally in the opening state.

Preferably, an included angle formed by a connecting line between the second pivot and the first pivot and a connecting line between the second pivot and the third pivot at the inner side of the main frame is an acute angle, so that force transmission during pushing of the cart is facilitated.

Preferably, the front portion of lower frame pole upwards bending type become the montant, the front end of last frame pole with the upper end of montant pass through first pivot rotation and connect, the height of shallow base can be raised in the setting of montant, avoid passenger and wheel to take place to rub.

Preferably, the lower frame rod forms the bottom of the main frame, and the front wheel bracket and the rear wheel bracket are both connected to the lower frame rod.

Preferably, in the process of changing the main frame from the unfolded state to the folded state, the lower rear rod is turned over forward and downward; in the folded state, the upper rear rod and the lower rear rod are close to each other. The folding process can fold and fold the main frame of the trolley as much as possible, and reduce the occupied space of the trolley after folding.

Further preferably, in the folded state, an outer angle formed by a connecting line between the third pivot and the second pivot and a connecting line between the third pivot and the fourth pivot outside the main frame is an acute angle.

More preferably, in the folded state, an included angle formed by a connecting line between the third pivot and the second pivot and a connecting line between the third pivot and the fourth pivot outside the main frame is 0-10 degrees, the smaller the degree of the formed included angle is, the smaller the size of the space occupied by the folded cart is, and the better the folding effect of the cart is.

Preferably, the first pivot, the second pivot, the third pivot and the fourth pivot are parallel, so that the rotating process is more convenient.

Preferably, the upper frame rod extends from the lower end part to the rear part from the rear upper part and bends and extends towards the rear lower part, so that the seat pocket can be more conveniently arranged.

Preferably, the main frame further comprises a push handle rod, and the rear end part of the upper frame rod and/or the upper end part of the upper rear rod are/is pivotally connected with the push handle rod; when the main frame is in a folded state, the pushing handle rod and the upper rear rod are folded and close to each other. The push handle rod may or may not be pivotally connected coaxially with the rear end of the upper frame rod and/or the upper end of the upper rear rod. The push handle rod can more conveniently push the cart, and the push handle rod can be folded and gathered at the rear side of the upper rear rod, so that the overall size of the folded cart can be further reduced.

Preferably, the front end of the rear wheel bracket is connected with the lower frame rod in a sliding and rotating manner through a sliding chute, the rear end of the rear wheel bracket is connected with the rear wheel in a rotating manner through a fifth pivot, the cart further comprises a second connecting rod, the front end of the second connecting rod is connected with the lower frame rod in a rotating manner through a sixth pivot, and the rear end of the second connecting rod is fixedly connected with the rear wheel; the stroller further has a further collapsed state, the fifth pivot being located rearwardly and upwardly of the sixth pivot when the stroller is in the further collapsed state; when the main frame is in the unfolding state or the folding state, the fifth pivot is positioned at the rear lower part of the sixth pivot.

The utility model discloses a setting is under the open mode, and the line between line third pivot between third pivot and the second pivot and the fourth pivot is greater than 180 degrees at the external angle that the main frame outside formed, prevents that the main frame from taking place unexpected folding to main frame inside under the unlocked state.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

the utility model discloses a main frame structure to the shallow improves for folding of shallow is more simple convenient, and the more safe and stable of open mode.

Drawings

FIG. 1 is a side schematic view of an embodiment of a cart in an open position;

FIG. 2 is a side view schematic illustration of an embodiment of the cart transitioning from an open collapsed state;

FIG. 3 is a side view schematic of an embodiment of the cart in a collapsed position;

FIG. 4 is a side view schematic of the main frame in an open position according to an embodiment;

FIG. 5 is a side view schematic illustration of the main frame of the exemplary embodiment transitioning from an unfolded state to a folded state;

FIG. 6 is a side view of the main frame in a folded state according to an embodiment;

FIG. 7 is a perspective view and an enlarged bottom view of part A of the main frame in a folded state according to an embodiment;

FIG. 8 is a perspective view of the embodiment of the cart in a further collapsed state;

fig. 9 is a perspective view of the embodiment of the cart in a further collapsed state.

In the above drawings: 1. a first pivot; 2. a second pivot; 3. a third pivot; 4. a fourth pivot; 5. a lower frame bar; 6. an upper frame bar; 7. mounting a rear rod; 8. a rear rod is arranged; 9. a vertical rod; 10. a front wheel bracket; 11. a rear wheel support; 12. a front wheel; 13. a rear wheel; 14. a handle pushing rod; 15. a fifth pivot; 16. a first fixed point; 17. a sixth pivot; 18. a first link; 19. a second link; 20. a shock absorber; 21. a chute.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in fig. 1, for example, the upper side of fig. 1 is upper, the lower side is lower, the left side is front, the right side is rear, the inner side of the main frame of the cart is inner, and the outer side of the main frame of the cart is outer. The above terms are merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; either directly or through the interior of the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 9, the present invention relates to a stroller which has two states of being opened and folded, and further has a further folded state, so that the stroller can be folded for storage, thereby facilitating use.

The cart mainly comprises a main frame, a front wheel bracket 10, a front wheel 12, a rear wheel bracket 11 and a rear wheel 13.

The main frame mainly comprises a lower frame rod 5, an upper frame rod 6, an upper rear rod 7 and a lower rear rod 8. As in the state of fig. 1, the lower frame bar 5 is located at the lower portion of the main frame, constitutes the bottommost portion of the main frame, and extends in the front-rear direction of the cart; in this embodiment, the front portion of the lower frame rod 5 is also bent upward to form a vertical rod 9, which can raise the height of the cart base. The upper frame rod 6 is positioned at the upper part of the main frame; in this embodiment, the upper frame rod 6 extends from the lower end portion thereof to the upper rear portion, bends to the rear portion and extends to the lower rear portion, and the bent portion is formed into an L-shaped curve and is naturally transited, so that the sitting pocket can be conveniently arranged. The upper rear bar 7 is located at the rear of the main frame and at the upper end of the main frame. The lower rear bar 8 is also located at the rear of the main frame and at the lower end of the main frame.

The front end part of the lower frame rod 5 is rotationally connected with the front end part of the upper frame rod 6 through a first pivot 1; in this embodiment, the lower frame rod 5 is pivotally connected to the front end of the upper frame rod 6 via the first pivot 1 from the upper end of the vertical rod 9. The rear end of the upper frame bar 6 is pivotally connected to the upper end of the upper rear bar 7 via the second pivot 2. The lower end of the upper rear link 7 is pivotally connected to the upper end of the lower rear link 8 by a third pivot 3. The lower end of the lower rear bar 8 is pivotally connected to the rear end of the lower frame bar 5 by a fourth pivot 4. Wherein, the first pivot 1, the second pivot 2, the third pivot 3 and the fourth pivot 4 are arranged in parallel, so that the rotating process is more convenient. Therefore, the lower frame rod 5, the upper frame rod 6, the upper rear rod 7 and the lower rear rod 8 are connected through the pivots to form the whole main frame.

In this embodiment, the main frame further comprises a push bar 14. The push handle lever 14 is provided at the rear end portion of the upper frame rod 6 and the upper end portion of the upper rear rod 7, and is pivotally connected to the rear end portion of the upper frame rod 6 and the upper end portion of the upper rear rod 7 not coaxially therewith. The push handle rod 14 can rotate around the pivot, so that the folding can be carried out, and the push handle rod 14 abuts against the outer side of the upper rear rod 7 after the folding is finished, so that the volume of the whole folded trolley can be reduced.

The main frame can have an unfolded and folded state because the rod members are pivotally connected to each other to be rotatable with respect to each other.

In the opened state, a connecting line between the third pivot shaft 3 and the second pivot shaft 2 and a connecting line between the third pivot shaft 3 and the fourth pivot shaft 4 are viewed as two sides of an angle with the third pivot shaft 3 as a vertex, so that an outer angle formed at the outer side of the main frame is larger than 180 degrees. Because the external angle that forms is greater than 180 degrees, when the main frame was under the open mode, because when receiving the thrust of the people who comes from the top and decurrent pressure, third pivot 3 can drive back rod 7 and back rod 8 down and be in the deformation that tends the main frame outside, consequently third pivot 3 can not take place to rotate to main frame inside voluntarily and make the main frame take place unexpected folding, can guarantee the stability of main frame under the open mode. In this embodiment, a locking device is further disposed at the position of the third pivot 3, so that the relative positions of the upper rear rod 7 and the lower rear rod 8 can be locked and fixed in the unfolded state, and the main frame can be further prevented from being folded accidentally. In addition, the connecting line between the second pivot 2 and the first pivot 1 and the connecting line between the second pivot 2 and the third pivot 3 are seen into two sides of an angle by taking the second pivot 2 as a vertex, so that an included angle formed inside the main frame is an acute angle, the forward transmission of the pushing force can be facilitated, and the pushing of the cart is facilitated.

When the main frame changes from the unfolded state to the folded state, a pushing force (e.g. a pushing force F in fig. 4 and 5) is applied to the inside of the main frame through the third pivot 3, so that the third pivot 3 drives the lower end of the upper rear rod 7 and the upper end of the lower rear rod 8 to move towards the inside of the main frame. The upper end part of the lower rear rod 8 is turned from the upper back part to the lower front part, and the lower end part of the lower rear rod 8 also drives the lower frame rod 5 to move towards the inner side of the main frame through the fourth pivot 4 to be folded. The lower end of the upper rear rod 7 is turned over forward and upward, and the upper end of the upper rear rod 7 also moves the upper frame rod 6 toward the inside of the main frame through the second pivot 2 to be folded.

In the folded state, the upper rear bar 7 and the lower rear bar 8 are brought together and drive the lower frame bar 5 and the upper frame bar 6 to be brought together. At this time, the connecting line between the third pivot 3 and the second pivot 2 and the connecting line between the third pivot 3 and the fourth pivot 4 are regarded as two sides of an angle by taking the third pivot 3 as a vertex, so that an external angle formed at the outer side of the main frame is an acute angle; in the embodiment, the formed external angle is 0-10 degrees, the smaller the formed included angle degree is, the smaller the occupied space of the cart after folding is, and the better the folding effect is.

The front wheel bracket 10 and the rear wheel bracket 11 of the cart are both connected to the lower frame bar 5.

A fixing piece is fixed below the lower frame rod 5, and two through holes are formed in the fixing piece along the front-back direction. The rear end of the front wheel bracket 10 is inserted on the lower frame rod 5 through a through hole; in this embodiment, the rear end of the front wheel bracket 10 is inserted into one of the through holes in the front. The front wheel bracket 10 is extended in the front direction of the cart in close contact with the lower frame bar 5. A clamping piece is fixed below the lower frame rod 5 and positioned in front of the fixing piece; the middle part of the front wheel bracket 10 can be fixedly clamped in the clamping piece. The clip also has a locking function, and can fix and lock the front wheel bracket 10 below the lower frame rod 5. The front wheel 12 of the cart is rotatably connected to the front end of the front wheel frame 10 via an axle.

The front end of the rear wheel bracket 11 is arranged in the middle of the lower frame rod 5, so that the gravity borne by the cart is more uniform. As shown in the enlarged bottom view of part a of fig. 7, a slide groove 21 is fixedly provided below the lower frame rod 5, the front end portion of the rear wheel bracket 11 is slidably and rotatably connected to the lower frame rod 5 through the slide groove 21, and the front end portion of the rear wheel bracket 11 is slidably and rotatably provided in the slide groove 21. A locking mechanism is arranged at the contact position of the front end part of the rear wheel bracket 11 and the sliding groove 21, and the locking mechanism can relatively fix the positions of the front end part of the rear wheel bracket 11 and the sliding groove 21 of the lower frame rod 5 in the opening and using process of the rear wheel bracket 11; in this embodiment, the front end portion of the rear wheel bracket 11 is fixed to the slide groove 21 by latching with a lock mechanism.

The rear wheel bracket 11 extends from the front end portion to the rear portion downward rearward, bends, and extends to the rear upper portion. The rear end of the rear wheel carrier 11 is pivotally connected to the axle of the rear wheel 13 by a fifth pivot 15.

The lower frame rod 5 includes a first link 18 at a rear end thereof and rearward of a front end of the rear wheel bracket 11. The front end of the first connecting rod 18 is fixedly connected with the lower frame rod 5 through a first fixing point 16; the rear end of the first link 18 is rotatably connected with the front end of the second link 19 by a sixth pivot 17; the rear end of the second link 19 is fixedly connected to the axle of the rear wheel 13. In this embodiment, the cart further includes a shock absorber 20. The shock absorber 20 is pivotally connected at its two ends to the fourth pivot 4 and the sixth pivot 17, respectively, and is capable of absorbing shock to the cart rear wheel 13 during pushing of the cart.

In this embodiment, the rear wheels 13 can be further folded in a state where the main frame of the cart is folded, as shown in fig. 7, 8 and 9 (fig. 9 is a perspective view with the wheels omitted). When the rear wheel 13 is folded, the rear wheel 13 is lifted upwards, so that the rear wheel 13 carries the second connecting rod 19 to rotate upwards around the sixth pivot 17; at the same time, the rear wheel 13 carries the rear wheel carrier 11 to slide and rotate in the slide groove 21 through the front end portion of the rear wheel carrier 11, so that the rear wheel carrier 11 and the rear wheel 13 rotate upward. When the stroller is in the further folded state, the fifth pivot 15 is located rearwardly and upwardly of the sixth pivot 17. The fifth pivot 15 is located rearward and below the sixth pivot 17 when the main frame is in the unfolded state or the folded state.

In the process of folding the rear wheel 13, the front end of the rear wheel bracket 11 firstly slides backwards in the sliding groove 21, and after the rear wheel 13 is turned upwards to the proper position, the front end of the rear wheel bracket 11 slides forwards in the sliding groove 21, so that the process of turning upwards the rear wheel 13 can be smoothly carried out.

When the rear wheel 13 is folded, one end of the second connecting rod 19 connected with the rear wheel 13 moves from the rear to the upper side, and the second connecting rod 19 is arranged in the vertical direction from the horizontal direction, so that the rear wheel 13 is folded and collected towards the inside of the main frame.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot 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 by the protection scope of the present invention.

Claims (10)

1. The utility model provides a cart, including the main frame that has open mode and fold condition, connect front wheel support (10) on the main frame, connect rear wheel support (11) on the main frame, set up in front wheel support (10) on front wheel (12), set up in rear wheel support (11) on rear wheel (13), its characterized in that: in the open state, the main frame comprises

The lower frame rod (5), the said lower frame rod (5) extends along the fore-and-aft direction;

the front end part of the upper frame rod (6) is rotatably connected with the front end part of the lower frame rod (5) through a first pivot (1);

the upper end part of the upper rear rod (7) is rotatably connected with the rear end part of the upper frame rod (6) through a second pivot (2);

the upper end part of the lower rear rod (8) is rotatably connected with the lower end part of the upper rear rod (7) through a third pivot (3), and the lower end part of the lower rear rod (8) is rotatably connected with the rear end part of the lower frame rod (5) through a fourth pivot (4);

the connecting line between the third pivot (3) and the second pivot (2) and the connecting line between the third pivot (3) and the fourth pivot (4) form an external angle of more than 180 degrees on the outer side of the main frame.

2. A cart according to claim 1, wherein: the included angle formed by the connecting line between the second pivot (2) and the first pivot (1) and the connecting line between the second pivot (2) and the third pivot (3) at the inner side of the main frame is an acute angle.

3. A cart according to claim 1, wherein: the front part of the lower frame rod (5) is bent upwards to form a vertical rod (9), and the front end part of the upper frame rod (6) is rotatably connected with the upper end part of the vertical rod (9) through the first pivot (1).

4. A cart according to claim 1, wherein: the lower frame rod (5) forms the bottommost part of the main frame, and the front wheel bracket (10) and the rear wheel bracket (11) are connected to the lower frame rod (5).

5. A cart according to claim 1, wherein: when the main frame is changed from the opening state to the folding state, the lower rear rod (8) is turned over towards the front lower direction; in the folded state, the upper rear rod (7) and the lower rear rod (8) are close to each other.

6. A cart according to claim 5, wherein: in the folded state, an outer angle formed by a connecting line between the third pivot (3) and the second pivot (2) and a connecting line between the third pivot (3) and the fourth pivot (4) outside the main frame is an acute angle.

7. A cart according to claim 1, wherein: the first pivot (1), the second pivot (2), the third pivot (3) and the fourth pivot (4) are parallel.

8. A cart according to claim 1, wherein: the upper frame rod (6) extends from the lower end part to the rear part from the rear upper part, is bent and extends towards the rear lower part.

9. A cart according to claim 1, wherein: the main frame also comprises a push handle rod (14), and the rear end part of the upper frame rod (6) and/or the upper end part of the upper rear rod (7) is/are pivotally connected with the push handle rod (14); when the main frame is in a folded state, the pushing handle rod (14) and the upper rear rod (7) are folded and close to each other.

10. A cart according to claim 1, wherein: the front end part of the rear wheel bracket (11) is connected with the lower frame rod (5) in a sliding and rotating way through a sliding groove (21), the rear end part of the rear wheel bracket (11) is connected with the rear wheel (13) in a rotating way through a fifth pivot (15), the cart further comprises a second connecting rod (19) of which the front end part is connected with the lower frame rod (5) in a rotating way through a sixth pivot (17), and the rear end part of the second connecting rod (19) is fixedly connected with the rear wheel (13); the stroller has a further collapsed state, the fifth pivot (15) being located rearwardly and upwardly of the sixth pivot (17) when the stroller is in the further collapsed state; the fifth pivot (15) is located rearward and below the sixth pivot (17) when the main frame is in the unfolded state or the folded state.

Images