Adjustable and foldable platform cart

Abstract

The utility model relates to the technical field of flatbed trolleys, in particular to an adjustable and foldable flatbed trolley which comprises a trolley plate frame, an armrest frame and a gear adjusting and containing structure used for adjusting the height of the armrest frame, and the gear adjusting and containing structure comprises an adjusting linkage rod, a plurality of sets of gear adjusting grooves and limiting rods capable of being clamped in the gear adjusting grooves. One end of the adjusting linkage rod is movably hinged to the trolley plate frame, the other end of the adjusting linkage rod is movably hinged to the armrest frame, the trolley plate frame is provided with two sliding rails, the lower end of the armrest frame is slidably installed in the two sliding rails, the limiting rod is arranged on the lower portion of the armrest frame and slides along the upper ends of the side walls of the sliding rails, and the gear adjusting grooves are symmetrically formed in the side walls of the two sliding rails. The armrest frame slides along the sliding rail and can drive the limiting rod to be clamped in the gear adjusting groove. By arranging the gear adjusting and containing structure, the height of the armrest frame can be adjusted or the armrest frame can be folded and contained, a user can conveniently find the armrest frame height and pushing mode suitable for the armrest frame, and the armrest frame is convenient to place or transport.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flat cart, concretely relates to adjustable and foldable flat cart. BACKGROUND

[0002] The flat cart is a carrying vehicle that is pushed and pulled by manpower, and it is the ancestor of all vehicles. The main function of the handcart is to save power, increase work load and improve labor.

[0003] The patent with the announcement number CN 219154517U discloses a flat cart with a storable handrail, relates to the technical field of flat cart, and comprises a flat cart body, the flat cart body is of a rectangular structure, a corner through slot is arranged on the left side of the flat cart body, a spring mounting hole is formed on the back of the flat cart body, a first storage assembly is arranged on the inner side of the spring mounting hole, a reinforcing rib is fixed on the front of the flat cart body, the reinforcing rib is symmetrically arranged about the center line of the flat cart body, and a second storage assembly is arranged on the front of the flat cart body. The flat cart with a storable handrail has a handrail accommodating cavity formed on the flat cart, and the spring force enables the pressing rod to press the handrail, so that the handrail can be stored. The handrail does not occupy space and can be directly stored in the flat cart body, and the back of the flat cart body remains flat, so that multiple flat carts can be stacked together, and the storage space is maximized.

[0004] The above scheme realizes the storage of the handrail, but the handrail has only two states, one is a folding storage state, and the other is an unfolded state. For users of different heights, the most suitable handrail height is different, and the most comfortable cart pushing method is also different. The above scheme cannot realize the height adjustment of the handrail, and is only suitable for the method of directly pushing the cart, so the applicability is not high. SUMMARY

[0005] The utility model aims at solving the prior art's insufficient, provides a kind of adjustable and foldable flat cart, can adjust the height of handrail and can select different cart pushing method, it is convenient for different users to use, it can also fold and store handrail frame simultaneously, it is convenient to place or batch installation transportation.

[0006] To solve the above problems, the utility model adopts the following scheme:

[0007] The adjustable and foldable flat cart comprises a cart board frame, a handrail frame movably mounted on the cart board frame, a gear adjusting and storing structure for adjusting the height of the handrail frame, the gear adjusting and storing structure comprises an adjusting linkage, a plurality of gear adjusting grooves, and a limiting rod capable of being clamped in the gear adjusting groove, one end of the adjusting linkage is movably hinged to the cart board frame, the other end is movably hinged to the handrail frame, the cart board frame is provided with two sliding rails, the lower end of the handrail frame is slidably mounted in the two sliding rails, the limiting rod is arranged at the lower part of the handrail frame and slides along the upper end of the side wall of the sliding rail, and the gear adjusting groove is symmetrically opened on the side wall of the two sliding rails, the lower end of the handrail frame slides along the sliding rail and drives the limiting rod to be clamped in one of the gear adjusting grooves to adjust the height of the handrail frame.

[0008] In the above scheme, the handrail frame is movably connected with the cart board frame through the sliding rail and the adjusting linkage movably hinged to the handrail frame, and the lower end of the handrail frame slides along the sliding rail to drive the limiting rod to move and be clamped in different groups of gear adjusting grooves, so as to adjust the height of the handrail frame, when the gear adjusting grooves are changed, the handrail frame is pressed down to make the lower end of the handrail frame rotate upward around the hinge point with the adjusting linkage, so as to be separated from the gear adjusting groove, and then the appropriate gear adjusting groove is selected, so that different users can find the appropriate height of the handrail frame and the cart mode.

[0009] As a preferred, the sliding rail has a starting point end near the hinge point of the adjusting linkage and the cart board frame, and a terminal end, when the handrail frame slides to the terminal end of the sliding rail, the handrail frame and the adjusting linkage are in a folded and stored state parallel to the cart board frame.

[0010] The above setting makes the handrail frame also foldable and stored, which is convenient for arrangement and transportation.

[0011] As a preferred, the gear adjusting and storing structure further comprises a locking assembly capable of fixing the handrail frame near the starting point end, the locking assembly comprises a handle pedal, a limiting piece mounted at the lower end of the handle pedal, and a restoring spring connected with the lower end of the limiting piece, when the restoring spring is in an initial state, the limiting rod is clamped in the limiting piece, when the handle pedal is pressed down to compress the restoring spring, the limiting rod is separated from the limiting piece.

[0012] In the above arrangement, the handrail frame can be fixed near the start end. In this way, the angle between the handrail frame and the board frame is small, the height of the handrail frame is high, and it is convenient to directly push, which provides an option for the pushing mode of the user. By arranging the locking member, the locking and unlocking of the handrail frame near the start end are realized. The lower handle pedal is pressed to press the limiting member, so that the limiting rod is separated from the limiting member and can slide along the side wall of the sliding rail. The appropriate gear adjusting groove is selected. If the handrail rod is to be returned to the start end, the handle pedal is pressed again, and the sliding rail is slid to the start end. At this time, the handle pedal is released, and the limiting member is moved upward to the limiting rod under the action of the restoring spring.

[0013] Preferably, the limiting member includes a horizontal part and a limiting part protruding from the horizontal part to clamp the limiting rod.

[0014] In the above arrangement, as long as the limiting rod is moved to the horizontal part, the handle pedal can be released. The limiting rod is clamped at the intersection of the limiting part and the horizontal part, and the limiting of the limiting rod by the limiting member is realized.

[0015] Preferably, the board frame is provided with two front wheels and two rear wheels, and the rear wheels are arranged near the start end. The gear adjusting groove is arranged near the end point.

[0016] Sometimes, in order to push comfortably and conveniently, the user will lift the two rear wheels off the ground and then push. Therefore, the gear adjusting groove is arranged near the end point. First, the height of the handrail frame is greatly reduced, which is more suitable for lifting and pushing. Then, the height of the handrail frame is adjusted according to different groups of gear adjusting grooves, which is convenient for the user to lift the two rear wheels and push.

[0017] Preferably, the gear adjusting groove is in the shape of an inverted trapezoid, including a vertical side and an inclined side. The vertical side of each group of gear adjusting grooves is near the start end, and the inclined side is near the end point.

[0018] In order to further facilitate the user to lift the two rear wheels and push, the side of the gear adjusting groove near the start end is arranged as a vertical side to facilitate clamping the limiting rod. In order to facilitate the replacement of different gear adjusting grooves, an inclined side is arranged to easily make the lower end of the handrail frame rotate around the hinge point of the adjusting linkage rod after the handrail frame is pressed down, so as to separate from the gear adjusting groove and re-slide along the sliding rail to the appropriate gear adjusting groove.

[0019] Preferably, the board frame is provided with a brake assembly capable of fixing the rear wheels at the two rear wheels. The brake assembly includes a connecting member connected with the board frame and a fixed clamping plate movably hinged with the connecting member. The fixed clamping plate can rotate along the hinge between the connecting member and the fixed clamping plate and clamp the rear wheel.

[0020] The brake assembly is arranged to fix the rear wheels when the board frame is used to carry goods, so as to keep the board cart stable and facilitate the carrying.

[0021] As preferred, the handle pedal is in the shape of a rod and a space for conveniently holding the hand is formed between the handle pedal and the board frame.

[0022] The above arrangement realizes dual-purpose, that is, the handle pedal can not only function in the locking assembly but also serve as a handle for convenient holding.

[0023] As preferred, a guard handle is arranged on the board frame near the front wheel, and a space for conveniently holding the hand is formed between the guard handle and the board frame.

[0024] The arrangement of the guard handle can release part of the collision during pushing, thereby protecting the goods on the board frame, and on the other hand, it is convenient for the user to hold the flat cart near the front wheel end.

[0025] As preferred, the handrail frame is in the shape of a rod with multiple corners, two of which are arranged to form a contact operation part for conveniently holding the handrail frame, and the handrail frame is further provided with a pushing operation rod for assisting pushing.

[0026] The above arrangement makes it convenient for the user to find a part of the handrail frame for conveniently holding or pushing the cart, thereby facilitating lifting and pushing operations.

[0027] The present utility model has the following beneficial effects:

[0028] The present utility model is arranged with a gear adjusting and storage structure, so that the handrail frame can be locked near the starting point end by the limiting rod and the locking assembly, or the limiting rod can be clamped in different groups of gear adjusting grooves, thereby adjusting the height of the handrail frame, making it convenient for different users to find the most suitable pushing mode and handrail frame height, or directly adjusting the handrail frame to be parallel to the board frame, thereby facilitating storage or batch installation and transportation.

[0029] The multiple groups of gear adjusting grooves are arranged near the ending point end, so that the height of the handrail frame can be first reduced to a large extent, making the height suitable for the mode of lifting the rear wheel and then pushing, thereby making it convenient for the user to select the most suitable pushing mode. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 FIG. 6 is a structural schematic view of the limiting rod clamped in one of the gear adjusting grooves of the present utility model;

[0031] Figure 2 FIG. 7 is a structural schematic view of the handrail frame in a folded storage state of the present utility model;

[0032] Figure 3 FIG. 8 is a partial side sectional view of the handrail frame in a folded storage state of the present utility model;

[0033] Figure 4Part side view of the limiting rod clamped in one group of gear adjusting grooves of the utility model;

[0034] Figure 5 Part sectional view of the locking assembly when locking the limiting rod of the utility model;

[0035] Figure 6 Part sectional view of the locking assembly when the locking assembly and the limiting rod are separated;

[0036] Figure 7 Part structure schematic view of the brake assembly installed on the vehicle plate frame of the utility model.

[0037] The drawings are as follows: vehicle plate frame 10, handrail frame 20, gear adjusting and storage structure 30, brake assembly 40, sliding rail 11, starting point end 12, terminal end 13, front wheel 14, rear wheel 15, guard plate handle 16, contact operation part 21, pushing operation rod 22, adjusting linkage rod 31, gear adjusting groove 32, vertical edge 321, inclined edge 322, limiting rod 33, locking assembly 34, limiting part 342, horizontal part 3421, limiting part 3422, restoring spring 343, connecting part 41, fixed clamping plate 42. DETAILED DESCRIPTION

[0038] The other advantages and effects of the utility model can be easily understood by those skilled in the art from the content disclosed in the specification. The utility model can also be implemented or applied by different specific embodiments, and the details in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0039] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the utility model in a schematic manner, and only show the components related to the utility model in the diagrams, not the number, shape and size of the components when actually implemented. The shape, number and proportion of each component in actual implementation can be randomly changed, and the component layout pattern can also be more complex.

[0040] In the embodiment, refer to Figures 1-7The embodiment provides an adjustable and foldable flat cart, which comprises a cart plate frame 10, a handrail frame 20 movably arranged on the cart plate frame 10, a gear adjusting and storing structure 30 for adjusting the height of the handrail frame 20, the gear adjusting and storing structure 30 comprises an adjusting linkage rod 23, a plurality of gear adjusting grooves 32, a limiting rod 33 capable of being clamped in the gear adjusting groove 32, one end of the adjusting linkage rod 23 is movably hinged to the cart plate frame 10, the other end is movably hinged to the handrail frame 20, the cart plate frame 10 is provided with two sliding rails 11, the lower end of the handrail frame 20 is movably arranged in the two sliding rails 11, the limiting rod 33 is arranged at the lower part of the handrail frame 20 and slides along the upper end of the side wall of the sliding rail 11, the gear adjusting groove 32 is symmetrically opened on the side wall of the two sliding rails 11, and the lower end of the handrail frame 20 slides along the sliding rail 11 and drives the limiting rod 33 to be clamped in one of the gear adjusting grooves 32, so that the height of the handrail frame 20 is adjusted; the sliding rail 11 is close to the starting point end 12 of the end where the adjusting linkage rod 23 is hinged to the cart plate frame 10, and the other end is the terminal end 13, when the handrail frame 20 slides to the terminal end 13 of the sliding rail 11, the handrail frame 20 and the adjusting linkage rod 23 are in a folded and stored state parallel to the cart plate frame 10, in the embodiment, the gear adjusting groove 32 is provided with three groups, and the cart plate frame 10 is assembled by a plurality of plate blocks.

[0041] In the above scheme, the handrail frame 20 is movably connected with the cart plate frame 10 through the sliding rail and the adjusting linkage rod 23 hinged thereto, and the lower end of the handrail frame 20 slides along the sliding rail 11 to drive the limiting rod 33 to move and be clamped in different groups of gear adjusting grooves 32, so that the height of the handrail frame 20 is adjusted, or the limiting rod 33 is slid to the terminal end 13 to realize the folding and storage of the handrail frame 20.

[0042] Reference Figures 5-6 In order to further increase the adjusting gears and make them suitable for more users, the gear adjusting and storing structure 30 further comprises a locking assembly 34 capable of fixing the handrail frame 20 close to the starting point end 12, the locking assembly 34 comprises a handle pedal 341, a limiting piece 342 arranged at the lower end of the handle pedal 341, a restoring spring 343 connected with the lower end of the limiting piece 342, when the restoring spring 343 is in the initial state, the limiting rod 33 is clamped in the limiting piece 342, when the handle pedal 341 is pressed to compress the restoring spring 343, the limiting rod 33 is separated from the limiting piece 342; the limiting piece 342 comprises a horizontal part 3421 and a limiting part 3422 protruding relative to the horizontal part 3421 to clamp the limiting rod 33.

[0043] By setting the locking assembly 34, the locking and unlocking of the handrail frame 20 near the starting end 12 is realized; if you want to lock, you can press the handle pedal 341 down, slide the limiting rod 33 to the horizontal part 3421, and then release the handle pedal 341, so that the limiting part 342 moves up under the action of the restoring spring 343, and the limiting rod 33 is clamped at the intersection of the limiting part 3422 and the horizontal part 3421; if you want to unlock, press the handle pedal 341 down again, so that the limiting rod 33 is separated from the limiting part 342, and at this time the handrail frame 20 can be slid and the limiting rod 33 can be slid.

[0044] Reference Figures 1-4 In order to provide different stroller modes for users, so that they can be used by more users. The stroller frame 10 is provided with two front wheels 14 and two rear wheels 15, and the rear wheels 15 are arranged near the starting end 12. The gear adjusting groove 32 is arranged near the ending end 13. Therefore, when the limiting rod 33 is slid to the gear adjusting groove 32, the height of the handrail frame 20 can be greatly reduced, so that the height is also suitable for the mode of lifting the rear wheels 15 and then pushing. According to different groups of gear adjusting grooves 32, the height of the handrail frame 20 can be adjusted, which is convenient for users to lift the two rear wheels 15 and push.

[0045] Reference Figures 1-4 The gear adjusting groove 32 is in the shape of an inverted trapezoid, including a vertical edge 321 and an inclined edge 322. The vertical edge 321 of each group of gear adjusting grooves 32 is near the starting end 12, and the inclined edge is near the ending end 13. In this embodiment, the part of the limiting rod 33 clamped in the gear adjusting groove 32 can be provided with anti-skid lines or wrapped with a relatively rough anti-skid layer. The anti-skid layer can be rubber material or anti-skid cloth, so as to increase the friction of the limiting rod 33 in the gear adjusting groove 32, and prevent the limiting rod 33 from being pushed out of the gear adjusting groove 32 during pushing.

[0046] The side of the gear adjusting groove 32 near the starting end 12 is arranged as a vertical edge 321, so as to facilitate clamping the limiting rod 33. At the same time, in order to facilitate replacement of different gear adjusting grooves 32, the inclined edge 322 is arranged, so that when the handrail frame 20 is pressed down, the lower end of the handrail frame 20 is easily turned upward around the hinge point of the adjusting linkage rod 23, so as to be separated from the gear adjusting groove 32 and be slid to the appropriate gear adjusting groove 32 along the sliding rail 11 again.

[0047] Reference Figure 7 In order to fix the rear wheels 15 when carrying goods to the stroller frame 10, so as to ensure that the flat stroller is stably parked and facilitate carrying. The stroller frame 10 is provided with a brake assembly 40 capable of fixing the rear wheels 15 at the two rear wheels 15. The brake assembly 40 includes a connecting piece 41 connected with the stroller frame 10, and a fixed clamping plate 42 movably hinged with the connecting piece 41. The fixed clamping plate 42 can rotate along the hinge of the connecting piece 41 and be clamped on the rear wheels 15.

[0048] Reference Figures 1-2 , for the convenience of carrying the plate cart. The handle pedal 341 is rod-shaped and is provided with a space for the convenience of carrying the plate cart. The plate frame 10 is provided with a guard plate handle 16 near the front wheel 14, and the space for the convenience of carrying the plate cart is formed between the guard plate handle 16 and the plate frame 10. The guard plate handle 16 can also release part of the collision during pushing, protecting the goods on the plate frame 10.

[0049] Reference Figures 1-2 , for the convenience of pushing the cart by holding the handrail 20. The handrail 20 is a rod-shaped structure with multiple corners, two of which are arranged to form a contact operation part 21 for the convenience of holding and lifting. The handrail 20 is also provided with a pushing operation rod 22 to assist in pushing.

[0050] The working process of the embodiment is as follows:

[0051] The handrail 20 of the embodiment has three states. The first state is to fix the handrail 20 near the starting point 12. The adjustment and locking process is as follows: step on the handle pedal 341 to make the limiting part 342 move downward to leave space for the movement of the limiting rod 33, then slide the limiting rod 33 along the upper end of the side wall of the sliding track 11 to the starting point 12, and then release the handle pedal 341 to make the limiting part 342 move upward and clamp the limiting rod 33 under the action of the restoring spring 343, realizing the locking of the handrail 20 near the starting point 12. The first state is suitable for the user to directly push the plate cart.

[0052] The adjustment process from the first state to the second state is as follows: release the handle pedal 341 to make the limiting rod 33 disengage from the limiting part 342, so that the limiting rod 33 can slide along the upper end of the side wall of the sliding track 11 and be clamped in the gear adjustment groove 32 selected. If you want to change to another gear adjustment groove 32, press the contact operation part 21 of the handrail 20 to make the lower end of the handrail 20 rotate upward around the hinge point of the adjustment linkage rod 23, so that the limiting rod 33 disengages from the gear adjustment groove 32 and slides into the gear adjustment groove 32 to be changed. The second state is suitable for the user to lift the rear wheel 15 first and then push the plate cart, and is also suitable for short people to directly push the plate cart.

[0053] The third state is to make the limiting rod 33 slide along the upper end of the side wall of the sliding track 11 to the end point 13. In this process, the handrail 20 and the adjustment linkage rod will gradually be in a folded and stored state parallel to the plate frame 10. This state is suitable for storage or batch installation and transportation.

[0054] The above description is only one specific example of the present application, and does not constitute any limitation on the present application. Obviously, for those skilled in the art, after understanding the content and principle of the present application, various modifications and changes in form and details can be made without departing from the principle and structure of the present application, but these modifications and changes based on the idea of the present application are still within the protection scope of the claims of the present application.

Claims

1. An adjustable and foldable flat cart, characterized by, The utility model provides a kind of vehicle board frame, handrail frame, gear adjusting and storage structure, the gear adjusting and storage structure includes adjusting linkage rod, multiple groups of gear adjusting slot, the limiting rod that can be clamped in gear adjusting slot, adjusting linkage rod (23) one end is hingedly connected in vehicle board frame (10), the other end is hingedly connected in handrail frame (20), vehicle board frame (10) is equipped with two sliding tracks (11), and the lower end of handrail frame (20) is slidably installed in two sliding tracks (11), limiting rod (33) is arranged in the lower part of handrail frame (20) and along the upper end of the side wall of sliding track (11) sliding, gear adjusting slot (32) is symmetrically opened in the side wall of two sliding tracks (11), the lower end of handrail frame (20) is slid along sliding track (11) and drives limiting rod (33) to be clamped in one of gear adjusting slot (32) to realize the height adjustment of handrail frame (20).

2. The adjustable and foldable flat cart of claim 1, wherein, The sliding track (11) is close to the starting point end (12) of the hinge connection of adjusting linkage rod (23) and vehicle board frame (10), and the other end is the end point end (13), when handrail frame (20) is slid to the end point end (13) of sliding track (11), handrail frame (20) and adjusting linkage rod (23) are all in the folding storage state parallel to vehicle board frame (10).

3. The adjustable and foldable flat cart of claim 2, wherein, The gear adjusting and storage structure (30) further includes a locking assembly (34) that can fix the handrail frame (20) near the starting point end (12), the locking assembly (34) includes a handle pedal (341), a limiting piece (342) installed at the lower end of the handle pedal (341), and a restoring spring (343) connected to the lower end of the limiting piece (342), when the restoring spring (343) is in the initial state, the limiting rod (33) is clamped in the limiting piece (342), when the restoring spring (343) is depressed by the handle pedal (341), the limiting rod (33) is disengaged from the limiting piece (342).

4. The adjustable and foldable flat cart of claim 3, wherein, The limiting piece (342) includes a horizontal part (3421) and a limiting part (3422) protruding from the horizontal part (3421) to clamp the limiting rod (33).

5. The adjustable and foldable flat cart of claim 2, wherein, The vehicle board frame (10) is installed with two front wheels (14) and two rear wheels (15), the rear wheels (15) are arranged near the starting point end (12), and the gear adjusting slot (32) is arranged near the end point end (13).

6. The adjustable and foldable flat cart of claim 5, wherein, The gear adjusting slot (32) is in the shape of an inverted trapezoid, including a vertical edge (321) and an inclined edge (322), and the vertical edge (321) of each group of gear adjusting slots (32) is close to the starting point end (12), and the inclined edge is close to the end point end (13).

7. The adjustable and foldable flat cart of claim 5, wherein, The vehicle board frame (10) is installed with a brake assembly (40) that can fix the rear wheel (15) at the two rear wheels (15), the brake assembly (40) includes a connecting piece (41) connected to the vehicle board frame (10) and a fixed clamping plate (42) hingedly connected to the connecting piece (41), and the fixed clamping plate (42) can rotate along the hinge connection of the connecting piece (41) and be clamped in the rear wheel (15).

8. The adjustable and foldable flat cart of claim 3, wherein, The handle pedal (341) is in the shape of a rod and forms a space for conveniently holding the handle pedal (341) with the board frame (10).

9. The adjustable and foldable flat cart of claim 5, wherein, The board frame (10) is provided with a guard handle (16) near the front wheel (14), and a space for conveniently holding the guard handle (16) is formed between the guard handle (16) and the board frame (10).

10. The adjustable and foldable flat cart of claim 1, wherein, The armrest frame (20) is in the shape of a rod with multiple corners, two of which are arranged to form a contact operation part (21) for conveniently holding and operating the armrest frame (20), and the armrest frame (20) is further provided with a pushing operation rod (22) for assisting pushing.

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