CN201026906Y - Foldable hand cart - Google Patents

Abstract

The utility model discloses a can receive and close handcart, include fore-stock, after-poppet, back frame and the seat frame that link together through the pin joint seat, pushing hands, front wheel subassembly, back wheel subassembly, two branches that are "ㄣ" are articulated to constitute the cross pipe support in its center department, two upper ends of cross pipe support articulate the upper portion of controlling two fore-stocks, two lower extremes of cross pipe support articulate the upper portion of controlling two after-bolsters. The utility model discloses can receive and close the handcart and receive the volume after closing very little, receive and close back front and back wheel in addition and can stand side by side to can continue to promote.

Description

foldable trolley

technical field

The utility model relates to a foldable trolley, in particular to a foldable trolley whose front and rear wheels can stand side by side after being folded and can continue to be pushed.

Background technique

The known collapsible trolley can only realize a simple folding function. When it is folded, its front and rear wheels can only be opened outwards. Keep the standing state, let alone make the trolley continue to be pushed in this state, which will cause inconvenience to storage and movement.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art and provide a foldable trolley which can stand side by side after the front and rear wheels are folded and can continue to be pushed.

The purpose of this utility model is achieved through the following technical solutions: construct a foldable trolley, including a front bracket, a rear bracket, a backrest frame and a seat frame connected together by a pivot seat, a push handle, a front wheel assembly, a rear Wheel assembly, two "ㄣ" struts are hinged at the center to form a cross tube bracket, the two upper ends of the cross tube bracket are hinged on the upper parts of the left and right front brackets, the two lower ends of the cross tube bracket Hinged on the top of the left and right rear brackets.

One end of a hinge with several circular holes is hinged on one side of the center of one of the struts, and correspondingly, one end of the hinge with cylindrical protrusions is hinged on the same side of the center of the other strut.

The hinge is in the shape of "ㄑ", and there are two round holes, one of which is located at the corner of the hinge, and the other is located at the tail end of the hinge.

The pivot seat includes a rear bracket connecting piece and a front bracket connecting assembly that are pivotally connected together, and a back seat board connecting piece is fixedly connected to the inner side of the rear bracket connecting piece.

The connecting end of the rear bracket connector and the rear bracket tube has a stepped body, the small end of the step body is inserted into the upper end of the rear bracket tube and fixed by screws on its side walls, and the other end of the rear bracket connector is provided with A cylindrical cavity, the center of the two walls of the cylindrical cavity is provided with a shaft hole, and the outer side of the inner wall is provided with several tenons.

The front bracket connection assembly includes a pivotal seat connector, a front bracket sleeve, an inner support frame that connects the pivotal seat connector and the front bracket sleeve, and one end of the pivotal seat connector has a At the cylindrical end of the cylindrical cavity, the center of the cylindrical end is provided with a shaft hole, and the other side of the pivotal seat connection has a chute along the direction of the front bracket, and the inner support frame is fixed In the chute, the front support sleeve sleeve is sleeved on the front support pipe, and its inner side wall is fixed on the inner support frame by screws.

The backrest seat board connector includes a backrest frame connection part and a seat board frame connection part, and several holes for matching tenons are arranged on the outside thereof.

From top to bottom, the front bracket includes a push handle height adjuster connected with the push handle, a front bracket tube whose middle part is inserted into the front bracket sleeve, and the lower ends of the two front bracket shrink rods hinged together in an "X" shape respectively The left and right front brackets are hinged together by an "L"-shaped connector, and the upper ends of the bracket retraction rods are respectively connected to the inner side of the seat frame.

The push handle height regulator includes one end connected to the push handle, and a slide bar with a stepped plunger inserted into the bracket tube at the other end. Several height adjustment holes are provided on the slide bar, and a tubular hinged frame is sleeved on the slide bar. It is connected with the front bracket tube and fixed on the screw hole on the outside of the front bracket tube through the screw hole on the outside. A stop button is hinged on the outside of the tubular hinged frame, and the stop head of the stop button enters the height adjustment hole on the slide bar. .

The rear bracket includes a rear bracket tube and two horizontal folding rods, the outer ends of the two horizontal folding rods are connected to the rear bracket tube through a "U" connector, and the two inner ends of the horizontal folding rods are hinged on a on deck.

The inner side of the lower ends of the two front support tubes is provided with pedals.

Two steel wire ropes are cross-connected at the lower parts of the front bracket and the rear bracket.

The front wheel assembly includes, from top to bottom, a front wheel frame fixture, a front wheel frame, a front wheel, and a shock absorbing device arranged in the front wheel frame fixture.

The rear wheel assembly includes, from top to bottom, a rear wheel frame fixture connected to the rear bracket pipe, a rear wheel frame, two rear wheels connected to both sides of the lower part of the rear wheel frame, and a brake device. The braking device comprises a brake key hinged in the cavity at the bottom of the rear wheel frame, and the brake key is connected with a brake iron plate.

There are two rear wheel assemblies, and the two brake iron plates are hinged together. One of the iron plates is provided with a protrusion on the upper and lower sides, and the other iron plate is provided with a gap at the corresponding position on the upper and lower sides. The brake iron plate engages with each other through the notch and the protrusion.

The utility model has the following advantages: since the front bracket and the rear bracket of the trolley are connected through a pivot joint, and a cross pipe bracket is provided at the back of the trolley, the trolley can keep standing after being folded and can continue to push; The adjuster is connected with the front bracket, and the height of the push handle can be adjusted to suit the needs of different users. In addition, the trolley is also provided with a braking device and an anti-vibration device.

Description of drawings

Fig. 1 is the perspective view of the right front side of the foldable trolley of the present invention;

Fig. 2 is a perspective view of the foldable trolley of the present invention observed from the left rear side;

Fig. 3 is an exploded view of the structure of the pivot seat of the foldable trolley of the present invention;

Fig. 4 is an exploded view of the structure of the push handle height adjuster of the foldable trolley of the present invention;

Fig. 5 is an exploded view of the structure of the front wheel assembly of the collapsible trolley of the present invention;

Fig. 6 is an exploded view of the structure of the rear wheel assembly of the foldable trolley of the present invention

Detailed ways

The collapsible trolley of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

As shown in Fig. 1 and Fig. 2, the foldable trolley of the present utility model includes a front bracket 1, a rear bracket 2, a backrest frame 5, a seat frame 6, a push handle 7, and a front wheel assembly 9 connected together by a pivot seat 4. , the rear wheel assembly 8, two "ㄣ" struts 30 are hinged at their centers to form a cross pipe bracket 3, and the two upper ends of the cross pipe bracket 3 are hinged on the upper parts of the left and right front brackets 1. The two lower ends of the cross pipe support 3 are hinged on the tops of the left and right rear supports 2, so that the whole handcart forms a four-bar mechanism, and the handcart can keep standing after being folded, and can continue to be promoted.

One end of a hinge 31 with two round holes 32 in the shape of "ㄑ" is hinged on one side of the center of one of the poles 30, and correspondingly, one end of a hinge 33 with a cylindrical protrusion is hinged on the same side of the center of the other pole 30 , the fastening of the two can enhance the firmness of the entire cross pipe bracket 3, and if it is necessary to fold the trolley, the two can be separated.

As shown in Fig. 1 and Fig. 3, the front bracket 1 and the rear bracket 2 are connected by a pivotal seat 4, and the pivotal seat 4 includes a rear bracket connector 40 and a front bracket connection assembly 41 which are pivotally connected together, and a back seat board is connected The member 42 is fixedly connected to the inner side of the rear support connecting member 40 . The rear support connector 40 and the connection end have a step body 400, the small end of the step body 400 is inserted into the upper end of the rear support pipe 24 and fixed by screws on its side wall, and the other end of the rear support connector 40 is provided with a cylindrical cavity 401, the center of the two walls of the cylindrical cavity 401 is provided with a shaft hole, and the outer side of the inner wall 402 is provided with several tenons 403 . The front bracket connection assembly 41 includes a pivotal seat connector 43 and an inner support frame 44. One end of the pivotal seat connector 43 has a cylindrical end 410 that can be accommodated in the cylindrical cavity 401, and the cylindrical end 410 has a There is a shaft hole in the center, and the other side of the pivot seat connector 43 has a chute 430 along the direction of the front bracket 1, the inner support frame 44 is fixed in the chute 430, and the front bracket tube 14 is fixed inside by screws on the support frame 44. The back seat board connector 42 comprises the back frame connection part 420 of the fixed back frame 5 and the seat board frame connection part 421 of the fixed seat board frame 6, and its outside is provided with several holes (not shown in the figure) that match the tenon 403 ), the back seat board connector 42 and the rear bracket connector 40 are connected by the screws described in the hole and the tenon and by its central hole. The backrest height adjustment button 51 is fixed on the backrest seat board connector 42 through a hinge 52, the backrest frame 5 has a cap 53, and the cap 53 can slide in the long groove 54, and the gap of the backrest height adjustment button 51 bottom is provided with Have spring 55, press backrest height adjustment button 51, and backrest frame 5 can make backrest frame 5 recline, and handcart can lie down for the user.

As shown in Fig. 1, Fig. 2 and Fig. 4, the front bracket 1 includes the push handle height adjuster 13 connected with the push handle 7 and the front bracket pipe 14 connected with the inner support frame 44 from top to bottom, which are hinged together in the shape of "X" The lower ends of the two front bracket retraction rods 17 in the "L" shape are respectively hinged together by the "L" shaped connector 11, and the left and right front brackets 1 are hinged together. The device 13 includes one end connected to the push handle 7, and a slide bar 131 that is a stepped body plunger 136 and inserted into the front bracket pipe 14 is installed in the other end. The slide bar 131 is provided with several height adjustment holes 132, and a tubular hinged frame 133 Be enclosed within slide bar 131 and front support pipe 14 joints and be fixed on the screw hole 15 of front support pipe 14 outsides by the screw hole 134 of its outside, tubular articulation frame 13 outsides are hinged with stop button 135, the stop button 135 The stop head enters the height adjustment hole 132 on the slide bar 131, presses the stop button 135 and applies push or pull force to the push handle 7 to adjust the height of the push handle 7 to suit users with different requirements. The inner sides of the lower ends of the two front support pipes 14 are provided with pedals 151, and the two ends of the pedals 151 are fixed by screws.

As shown in Figure 2, the rear bracket 2 includes a rear bracket tube 24 and two horizontal folding rods 26, the outer ends of the two horizontal folding rods 26 pass through the "U" connector 21, and the two horizontal folding rods 26 The inner end is hinged on a deck 22 . Two steel wire ropes 152 are cross-connected at the bottom of the front bracket 1 and the rear bracket 2 to strengthen the fastness of the entire vehicle body.

As Fig. 1, Fig. 5, described front wheel assembly 9 comprises front wheel frame fixture 90, front wheel frame 91, front wheel 93 successively from top to bottom, also comprises the damping device that is located in front wheel frame fixture 90 92, the damping device 92 includes two horizontal springs 920 connected to the neck of the moving shaft 95 and a vertical spring 922 supported by a vertical rod 921, the horizontal spring 920 is limited by a hook 923 The neck of the moving shaft 95 is fixed in the cavity 901 inside the front wheel frame fixture 90 through a cross-shaped cover 902. The side of the vertical rod 921 of the vertical spring 922 is provided with a square hole, and a square cover 903 passes through The inner side of the vertical rod 921 is matched with a protrusion with a square hole, which is fixed in the cavity 904 inside the front wheel frame fixing part 90 . The lower end of the moving shaft 95 has a cap, and is connected with the first positioning structure 94, the second positioning structure 95, the third positioning structure 96 and the wheel frame 91 through the cap in turn, because there are anti-vibration devices in the left and right front wheel assemblies. , which greatly enhances the smoothness of the entire trolley operation.

As shown in Fig. 2 and Fig. 6, the rear wheel assembly 8 includes a rear wheel frame fixture 80 connected to the rear bracket pipe 24, a rear wheel frame 81, and a rear wheel frame 81 connected on both sides of the bottom of the rear wheel frame 81 from top to bottom. Two rear wheels 83 of part 810, and brake device 82, and described brake device 82 comprises the brake key 84 that is hinged in the cavity 85 of the bottom center of rear wheel frame 81, and brake key 84 is connected by the gap 840 on its inner side wall Brake iron plate 86; Similarly, the other side of handcart is also symmetrically provided with a rear wheel assembly 8, and two brake iron plates 86 are hinged together by the hole 860 near its end, and wherein one iron plate 86 upper and lower sides respectively is provided with There is a protrusion 87, and a notch 88 is provided at the corresponding positions on the upper and lower sides of the other iron plate 86, and the two brake iron plates 86 engage with each other through the notch 88 and the protrusion 87. When the brake button 84 is pressed, the brake iron plate 86 Move down, push down two rear wheels 83, realize braking.

Claims (10)

1. A collapsible trolley, including a front bracket (1), a rear bracket (2), a backrest frame (5), a seat frame (6), and a push handle (7) connected together by a pivot seat (4) , the front wheel assembly (9), the rear wheel assembly (8), are characterized in that two struts (30) that are "ㄣ" are hinged at their centers to form a cross pipe support (3), and the cross pipe support ( The two upper ends of 3) are hinged on the tops of the left and right front brackets (1), and the two lower ends of the cross pipe brackets (3) are hinged on the tops of the left and right rear brackets (2). 2. The collapsible trolley according to claim 1, characterized in that one end of a hinge (31) with several round holes (32) is hinged on one side of the center of one of the poles (30), correspondingly, One end of a hinge (33) with cylindrical protrusions is hinged on the same side of the center of another strut (30). 3. The collapsible trolley according to claim 2, characterized in that, the hinge (31) is in the shape of "ㄑ", and the number of the round holes (32) is two, one of which is located on the hinge (31) On the corner, another is located at the tail end of hinge (31). 4. The collapsible trolley according to claim 1, characterized in that, the pivot joint seat (4) comprises a rear bracket connecting piece (40) and a front bracket connecting assembly (41) pivotally connected together, a backrest The seat board connector (42) is affixed to the inner side of the rear bracket connector (40). 5. The collapsible trolley according to claim 4, characterized in that, the connecting end of the rear bracket connector (40) and the rear bracket pipe (24) has a step body (400), and the small step body end is inserted into the upper end of the rear bracket pipe (24) and fixed by screws on its side wall, the other end of the rear bracket connector (40) is provided with a cylindrical cavity (401), and the cylindrical cavity (401) Shaft holes are arranged at the centers of the two walls, and several tenons (403) are arranged on the outside of the inner wall (402). 6. The collapsible trolley according to claim 4, characterized in that, the front bracket connection assembly (41) includes a pivotal seat connection piece (43) and an inner support frame (44), and the pivotal seat is connected to One end of the piece (43) has a cylindrical end (410) that can be accommodated in the cylindrical cavity (401), the center of the cylindrical end (410) is provided with a shaft hole (411), and the inner support frame (45) is fixed in the chute (430), and the front support tube (14) is fixed on the inner support frame (45) by screws. 7. The collapsible trolley according to claim 4, characterized in that, the backrest seat board connector (42) includes a backrest frame connection part (420) and a seat board frame connection part (421), and several Fits the hole of the tenon (403). 8. The collapsible trolley according to claim 1, characterized in that, the front bracket (1) sequentially includes a push handle height adjuster (13) connected with the push handle (7) from top to bottom, and the middle part is inserted into The front bracket tube (14) in the front bracket sleeve (44), the lower ends of the two front bracket shrink rods (17) in the shape of an "X" that are hinged together connect the left and right sides through the "L" shape connector (11) respectively. The two front supports (1) are hinged together, and the upper ends of the support contraction rods (17) are respectively connected with the inner sides of the seat frame (6). 9. The collapsible trolley according to claim 8, characterized in that, the push handle height adjuster (13) includes one end connected to the push handle (7), a stepped plunger (136) installed in the other end and Insert the slide bar (131) of the front support tube (14), and the slide bar (131) is provided with several height adjustment holes (132), and a tubular hinged frame (133) is sleeved on the slide bar (131) and the front support tube. (14) the joint is fixed on the screw hole 15) on the outside of the front bracket pipe (14) by the screw hole (134) on its outside, and the stop button (135) is hinged on the outside of the tubular hinged frame (133). The stop head of (135) enters in the height adjustment hole (132) on the slide bar (131). 10. The collapsible trolley according to claim 1, characterized in that, the rear support (2) comprises a rear support tube (24) and two horizontal folding bars (26), and the two horizontal folding bars ( The outer end of 26) is connected with rear bracket pipe (24) through " U " shape connector ( 21 ), and the two inner ends of described horizontal folding bar ( 26 ) are hinged on a deck ( 22 ); A foot pedal (151) is provided on the inner side of the lower end of the front support pipe (14); two crossing wire ropes (152) are connected at the bottom of the front support (1) and the rear support (2).

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