Trolley convenient to use

Abstract

The trolley convenient to use comprises a bearing frame, a front wheel assembly, two linkage rods, a rear wheel assembly, a pull handle and a limiting mechanism, and the bearing frame is provided with a bearing space; the front wheel assembly comprises at least two front wheels, each front wheel comprises a wheel body and a wheel seat, and the wheel seats are detachably and rotationally connected with the bearing frame through vertical pivotal shafts; the two linkage rods comprise the first linkage rod and the second linkage rod, the first linkage rod and the second linkage rod are rotationally connected with the wheel seats, and the rotation center between the first linkage rod and the wheel seats is coaxial with the pivot shaft. A base is arranged at the bottom of the pull handle, the base is rotationally connected with the two linkage rods, and when the base swings in the left-right direction along with the pull handle, all the front wheels can be driven by the two linkage rods to steer synchronously. During steering operation, the front wheels synchronously steer along with the pull handle, the influence of road conditions is avoided, steering is more convenient, and when the front wheel assembly is disassembled, the two linkage rods, the pull handle and the base are separated from the bearing frame, so that packaging and transportation are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carrying devices, and particularly relates to a trolley convenient to use. BACKGROUND

[0002] The existing trolley, especially a camping trolley used for outdoor pushing, when running on uneven road surfaces, such as grassland, beach, etc., the operator needs to turn the pull rod left and right when performing the steering operation, but the wheels cannot steer or the steering angle does not reach the requirement due to the uneven road surface, so that the operator needs to exert greater force to drive the whole trolley to steer, and the operation is inconvenient. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a trolley convenient to use, which is convenient to steer and convenient to package, transport and assemble.

[0004] The present application provides a trolley convenient to use, which comprises:

[0005] A bearing frame having a bearing space;

[0006] A front wheel assembly comprising at least two front wheels, each of the front wheels comprising a wheel body and a wheel seat, and the wheel seat is detachably connected with the bearing frame through a vertical pivot shaft;

[0007] Two connecting rods comprising a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are connected with the wheel seat, and the rotation center between the first connecting rod and the wheel seat is coaxially arranged with the pivot shaft;

[0008] A rear wheel assembly;

[0009] A pull handle, the bottom of the pull handle is provided with a base, the base is connected with the two connecting rods, and when the base swings left and right with the pull handle, all the front wheels can be driven to steer synchronously through the two connecting rods.

[0010] The following also provides several optional modes, but not as an additional limitation of the above general scheme, just a further supplement or preferred, without technical or logical contradiction, each optional mode can be combined with the above general scheme, and the combination between multiple optional modes is also possible.

[0011] Optionally, the trolley further comprises a limiting mechanism for limiting the steering angle of the front wheels.

[0012] Optionally, the first connecting rod comprises a rod portion and a pivot base connected with the rod portion, the pivot shaft is connected with the bearing frame through the pivot base, and the limiting mechanism is arranged between the pivot base and the corresponding wheel seat.

[0013] Optionally, the pivot base comprises:

[0014] A U-shaped connecting base comprising a base connected with the rod part, and two connecting arms connected with the base;

[0015] A connecting cylinder penetrating and connected with the two connecting arms, the connecting cylinder being provided with a pivot hole rotatingly matched with the pivot shaft.

[0016] Optionally, the two connecting arms are respectively a first connecting arm and a second connecting arm from bottom to top, the wheel base being provided with an upper surface, the first connecting arm being provided with an outward protruding limiting part, and the limiting mechanism comprising:

[0017] A limiting groove extending circumferentially with the pivot shaft as the center;

[0018] A limiting pin arranged in the limiting part and extending into the limiting groove, when the limiting pin abuts against the end wall of the limiting groove, the steering angle of the front wheel is at a maximum value.

[0019] Optionally, the connecting base and the wheel base are made of metal, the limiting part extending horizontally and being arranged in parallel and spaced apart from the upper surface.

[0020] Optionally, a first gasket is arranged between the limiting part and the upper surface, and the limiting pin penetrates the first gasket.

[0021] Optionally, the second connecting rod and the wheel base are made of metal, the upper surfaces of the second connecting rod and the wheel base being arranged in spaced apart, and the trolley comprises a second gasket arranged between the second connecting rod and the upper surface.

[0022] Optionally, the pull handle is rotatingly matched with the base, and the pull handle rotates in a vertical plane.

[0023] Optionally, the wheel body is detachably connected with the wheel base.

[0024] The trolley of the present application, when steering, operates the pull handle to make the front wheel steer synchronously, which is not affected by the road condition, and the steering is more convenient, when the front wheel assembly is detached, the two connecting rods, the pull handle and the base are separated from the bearing frame, which is convenient for packaging, transportation and subsequent assembly. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural view of the trolley of an embodiment of the present application;

[0026] Figure 2 is Figure 1 is an exploded view of the bearing frame and the front wheel assembly of the trolley;

[0027] Figure 3 isFigure 2 An exploded view between the middle wheel body and the wheel seat;

[0028] Figure 4 A top view of the trolley at the front wheel assembly according to an embodiment of the present application;

[0029] Figure 5 A top view of the trolley at the front wheel assembly according to an embodiment of the present application; Figure 4 A structural view of the middle front wheel assembly;

[0030] Figure 6 A top view of the trolley at the front wheel assembly according to an embodiment of the present application; Figure 4 A top view of the trolley at the front wheel assembly according to an embodiment of the present application;

[0031] Figure 7 A structural view of the middle front wheel assembly; Figure 6 A structural view of the middle front wheel assembly;

[0032] Figure 8 An exploded view between the first linkage rod, the second linkage rod and the wheel seat of the trolley according to an embodiment of the present application.

[0033] The reference signs in the drawings are explained as follows:

[0034] 1000, trolley; 100, carrying frame;

[0035] 200, front wheel assembly; 210, front wheel; 211, wheel body; 220, wheel seat; 221, pivot shaft; 222, limiting groove; 223, upper surface;

[0036] 300, rear wheel assembly;

[0037] 410, first linkage rod; 411, rod part; 412, pivot shaft seat; 413, connecting seat; 4131, base; 4132, connecting arm; 4133, limiting part;

[0038] 414, connecting cylinder; 4141, pivot hole;

[0039] 420, second linkage rod;

[0040] 500, pull handle; 510, base; 610, limiting pin; 620, first gasket; 630, second gasket. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0042] It is to be understood that where the terms "connected" or "coupled" are used herein, these terms are intended to be synonymous with each other unless otherwise indicated. That is, for the purposes of this application, a component that is "connected" or "coupled" to another component can be directly connected or coupled to the other component or can be indirectly connected or coupled to the other component through an intervening component. In addition, it is to be understood that where the term "comprising" is used herein, it is intended to be synonymous with the term "including" and vice versa.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "and / or" includes a set of one or more associated listed items.

[0044] In this application, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0045] First, for the convenience of description, "end" in the text represents the end point of the structure or a certain point or area in the direction or the specific structure connected to the point or area. "Pull handle" is mostly pulled by the operator to drive the trolley to move forward, and can also be pushed to move the trolley forward.

[0046] Referring to Figures 1-7 The present application provides a convenient trolley (hereinafter referred to as trolley 1000), the following left and right, front and back, and vertical directions are based on the trolley 1000 placed on the horizontal plane. The trolley 1000 includes a carrying frame 100, a front wheel assembly 200, a rear wheel assembly 300, a pull handle 500, and two connecting rods. The carrying frame 100 is connected by a plurality of rods and has a carrying space, which can be used to carry children or load articles. In order to improve comfort and convenience, a flexible cloth bag is installed in the carrying frame 100.

[0047] The front wheel assembly 200 includes at least two front wheels 210, each front wheel 210 including a wheel body 211 and a wheel seat 220, the wheel seat 220 being detachably rotatably connected to the carrying frame 100 through a vertical pivot shaft 221. The two connecting rods include a first connecting rod 410 and a second connecting rod 420, the first connecting rod 410 and the second connecting rod 420 being rotatably connected to the wheel seat 220, and the rotation center between the first connecting rod 410 and the wheel seat 220 being coaxially arranged with the pivot shaft 221.

[0048] The bottom of the pull handle 500 is provided with a base 510, which is rotationally connected with the two connecting rods. When the base 510 swings along with the pull handle 500 in the left-right direction, all the front wheels 210 can be driven to synchronously steer through the two connecting rods. For the understanding of the synchronization: the steering angle and direction of the front wheels 210 are the same as the swinging angle and direction of the pull handle 500 in the left-right direction. Corresponding to the structure: the sequentially connected points of the first connecting rod 410, the second connecting rod 420 and any two-wheel seat 220 form a first parallelogram, and the sequentially connected points of the first connecting rod 410, the second connecting rod 420, the base 510 and any wheel seat 220 form a second parallelogram. Among them, the wheel seat 220 is detachably connected with the bearing frame 100, and the two connecting rods and the pull handle 500 are also detached, which is convenient for packaging, transportation and assembly. For example, the bearing frame 100 is provided with a socket extending in the height direction and a lock piece sliding in the radial direction. During assembly, the pivot shaft 221 is inserted into the socket, and the lock piece is reset under the action of the spring to limit the pivot shaft 221 from being separated from the bearing frame 100.

[0049] The trolley of the present application can steer the front wheels 210 synchronously when the pull handle 500 is operated, which is not affected by the road conditions and is more convenient to steer. Among them, the trolley 1000 further comprises a limiting mechanism for limiting the steering angle of the front wheels 210, so as to avoid interference between the pull handle, the two connecting rods, the front wheels and the wheel seats and damage to the parts. The trolley 1000 further comprises a limiting mechanism arranged between two components, and the action object is as follows:

[0050] a. Between the base and at least one connecting rod;

[0051] b. Between at least one connecting rod and a wheel seat;

[0052] c. Between the two connecting rods.

[0053] Among them, the number of front wheels 210 shown in the drawings is two, and they are connected to the two ends of the first connecting rod 410. Referring to Figures 4-8 In an embodiment, the first connecting rod 410 comprises a rod portion 411 and a pivot seat 412 connected with the rod portion 411. The pivot shaft 221 is rotationally connected with the bearing frame 100 through the pivot seat 412, and the limiting mechanism is arranged between the pivot seat 412 and the corresponding wheel seat 220. In the drawing, the pivot seat 412 comprises a U-shaped connecting seat 413 and a connecting cylinder 414. The connecting seat 413 comprises a base portion 4131 connected with the rod portion and a connecting arm 4132 connected with the base portion 4131. The connecting cylinder 414 penetrates and is connected with the connecting arm 4132, and the connecting cylinder 414 is provided with a pivot hole 4141 rotationally matched with the pivot shaft 221.

[0054] The two connecting arms 4132 are a first connecting arm and a second connecting arm from bottom to top, respectively, and the wheel seat 220 has an upper surface 223, the first connecting arm has an outward protruding limiting portion 4133, the limiting mechanism includes a limiting slot 222 and a limiting pin 610, the limiting slot 222 is arranged on the wheel seat 220 and extends circumferentially with the pivot shaft 221 as the center; the limiting pin 610 is arranged on the limiting portion 4133 and extends into the limiting slot 222, when the limiting pin 610 abuts against the end wall of the limiting slot 222, the steering angle of the front wheel 210 is at a maximum value. For example, the maximum steering value of the front wheel 210 is 60 degrees.

[0055] Among them, the connecting seat 413 and the wheel seat 220 are metal materials, the limiting portion 4133 extends horizontally and is arranged in parallel and spaced apart from the upper surface 223 to reduce friction between metals. Preferably, the trolley 1000 further comprises a first gasket 620 arranged between the limiting portion 4133 and the upper surface 223, the limiting pin 610 penetrates the first gasket 620, the first gasket 620 is a non-metal material, for example, a rubber material, to avoid friction with the connecting seat 413 and the wheel seat 220 and make the connecting seat 413 and the wheel seat 220 move smoothly.

[0056] The second connecting rod 420 is a metal material, and it is arranged in spaced apart from the upper surface 223 of the wheel seat 220, and the trolley 1000 comprises a second gasket 630 arranged between the second connecting rod 420 and the upper surface 223. The second gasket 630 is a non-metal material, for example, a rubber material, to avoid friction with the second connecting rod 420 and the wheel seat 220 and make the second connecting rod 420 and the wheel seat 220 move smoothly to maintain the steering fluency of the front wheel.

[0057] Among them, the pull handle 500 is rotationally connected with the base 510, and the pull handle 500 rotates in a vertical plane. That is, the rotation plane of the pull handle 500 is perpendicular to the rotation plane of the base 510, so that the steering feedback of the pull handle 500 to the speed of the front wheel is more timely.

[0058] Referring to Figure 3 In an embodiment, the wheel body 211 is detachably connected with the wheel seat 220, facilitating replacement of the wheel body 211 to adapt to different scenes. For example, in the case of uneven road surface such as beach or grassland, the front wheel 210 and the rear wheel of the rear wheel assembly can be a large-size wheel body as shown in the figure, the large size including the diameter and width of the wheel body, and the surface tread of the wheel body should be more suitable for such scenes. For another example, in indoor or shopping mall, etc., it can be a common wheel body, for example, with smaller width than the foregoing. The rear wheel assembly 300 includes a second wheel seat and a second wheel body, the second wheel body and the second wheel seat are detachably connected, and the second wheel seat is detachably connected with the carrying frame 100 through a second pivot shaft. In the foregoing, the wheel seat 220 of the front wheel 210 is a first wheel seat, the pivot shaft 221 is a first pivot shaft, and the wheel body 221 is a first wheel body.

[0059] Specific steering operation is: rotating the pull handle in left and right direction, the base turns, the second connecting rod is offset relative to the first connecting rod, thereby driving the wheel seat relative to the pivot shaft, realizing the synchronous steering of the front wheel. When the front wheel rotates to the limit angle, the limiting mechanism is triggered, limiting the rotation of the front wheel, feedback to the pull handle, the pull handle can not be further rotated. If the operator still applies force to drive the pull handle to further turn, the force is fed back to the bearing frame through the limiting mechanism at both ends, causing the bearing frame to move left and right as a whole, while avoiding the interference of the main components and damage.

[0060] The handcart of the present application, when steering, operates the pull handle to make the front wheel synchronous steering, which is not affected by road conditions, steering is more convenient, and it is convenient for packaging, transportation and assembly.

[0061] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope disclosed in the specification. When the technical features in different embodiments are embodied in the same figure, it can be considered that the figure also discloses the combination of each embodiment involved.

[0062] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A trolley for easy use, characterized in that The utility model provides a handcart, comprising: a bearing frame having a bearing space; a front wheel assembly comprising at least two front wheels, each of the front wheels comprising a wheel body and a wheel seat, the wheel seat being detachably pivotally connected to the bearing frame by a vertical pivot shaft; two connecting rods, the first connecting rod and the second connecting rod being pivotally connected to the wheel seats, the pivot center between the first connecting rod and the wheel seat being coaxially arranged with the pivot shaft; a rear wheel assembly; a handle, the bottom of the handle being provided with a base, the base being pivotally connected to the two connecting rods, when the base swings left and right with the handle, all the front wheels can be synchronously steered by the two connecting rods.

2. The easy-to-use stroller of claim 1, wherein, The utility model further comprises a limiting mechanism for limiting the steering angle of the front wheels.

3. The easy-to-use stroller of claim 2, wherein, The first connecting rod comprises a rod portion and a pivot base connected to the rod portion, the pivot shaft being pivotally connected to the bearing frame through the pivot base, the limiting mechanism being arranged between the pivot base and the corresponding wheel seat.

4. The easy-to-use stroller of claim 3, wherein, The pivot base comprises: a U-shaped connecting seat comprising a base connected to the rod portion and two connecting arms connected to the base; a connecting cylinder penetrating through and connected to the two connecting arms, the connecting cylinder being provided with a pivot hole pivotally matched with the pivot shaft.

5. The easy-to-use stroller of claim 4, wherein, The two connecting arms are a first connecting arm and a second connecting arm from bottom to top, the wheel seat being provided with an upper surface, the first connecting arm being provided with an outward convex limiting portion, the limiting mechanism comprising: a limiting groove extending circumferentially with the pivot shaft as the center; a limiting pin arranged in the limiting portion and extending into the limiting groove, when the limiting pin abuts against the end wall of the limiting groove, the steering angle of the front wheels reaches the maximum value.

6. The easy-to-use stroller of claim 5, wherein, The connecting seat and the wheel seat are made of metal, the limiting portion extending horizontally and being arranged in parallel and spaced apart from the upper surface.

7. The easy-to-use stroller of claim 6, wherein, The utility model further comprises a first gasket arranged between the limiting portion and the upper surface, the limiting pin penetrating through the first gasket.

8. The easy-to-use stroller of claim 4, wherein, The second connecting rod and the wheel seat are made of metal, the upper surfaces of the second connecting rod and the wheel seat being arranged in parallel and spaced apart, the utility model further comprising a second gasket arranged between the second connecting rod and the upper surface.

9. The easy-to-use stroller of claim 1, wherein, The handle is pivotally matched with the base, and the handle rotates in a vertical plane.

10. The easy-to-use stroller of claim 1, wherein, The wheel body is detachably connected to the wheel seat.

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