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Four-connecting-rod locking mechanism and foldable trolley using same

A locking mechanism, four-bar linkage technology

Active Publication Date: 2017-03-08
陈昭胜 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the fact that the trolleys in the prior art cannot be folded, and even if they can be folded, the structure is complex and the purpose is single. In addition, after the existing trolleys are folded, they are not only bulky and inconvenient to carry, but also cannot be folded during the folding process. Full linkage, inconvenient opening and folding, poor practicability, low safety and other problems, the invention provides a four-link locking mechanism and a folding trolley using the mechanism

Method used

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  • Four-connecting-rod locking mechanism and foldable trolley using same
  • Four-connecting-rod locking mechanism and foldable trolley using same
  • Four-connecting-rod locking mechanism and foldable trolley using same

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Embodiment 1

[0035] Such as figure 1 As shown, Embodiment 1 of the present invention provides a four-link locking mechanism, which is mainly used to describe the use of a set of two-link assembly mechanisms in this technical solution to lock three sets of four-link assemblies mechanism, thereby forming a truss assembly that can be folded and opened in linkage.

[0036] The four-link locking mechanism includes a two-link assembly and a middle four-link assembly;

[0037] The middle four-link assembly is a rhombus structure composed of two symmetrically arranged first connecting rods 1 and two symmetrically arranged second connecting rods 2. The top ends of the two first connecting rods 1 and The bottom ends of the two second connecting rods 2 are hinged by hinges; the two connecting rod assemblies are composed of two equal-length third connecting rods 3 hinged; the two equal-length connecting rod assemblies are composed of two equal-length The third connecting rod 3 is formed, and when tw...

Embodiment 2

[0045] Such as image 3 or 4, the embodiment of the present invention provides a four-link locking mechanism, and this embodiment 2 further defines the structure of the four-link locking mechanism on the basis of embodiment 1, improving the four-link The stability and safety of the locking mechanism connection.

[0046] Such as Figure 4 As shown, the position of the hinge point in the middle of the two connecting rod assemblies is lower than the position of the hinge point with the first connecting rod 1, and the bottom of one of the second connecting rods 2 is connected with a limit rod 6, and the two The hinge point in the middle of the connecting rod assembly abuts against the limiting rod 6 .

[0047] The two-link assembly has three rotation centers, and the rotation center in the middle is lower than the rotation centers on both sides, so when the four-link locking mechanism is folded, the component force on the two-link assembly must be horizontal, Therefore, it is n...

Embodiment 3

[0050] Such as Figure 5 As shown, in order to overcome the defects existing in trolleys or handcarts in the prior art, the present invention provides a folding trolley using the four-link locking mechanism. The full linkage between the rods can be realized, and the trolley has wide application and high safety.

[0051] This handcart comprises car body 8, and described car body 8 comprises the folding vehicle frame 9 that can unfold or folds and the wheel 10 that is arranged at the bottom of described folding vehicle frame 9, and described wheel 10 comprises front wheel and rear wheel, and described folding The vehicle frame 9 is composed of two symmetrically arranged four-bar linkage locking mechanisms connected by struts 11, and the two-link assembly in the two four-bar linkage locking mechanisms is connected by struts 11 to form a double-folded chassis 12 , the ends of the first crossbar 5 in the two four-bar linkage locking mechanisms are connected by the struts 11 to for...

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Abstract

The invention provides a four-connecting-rod locking mechanism and a foldable trolley using the same. The locking mechanism comprises a two-connecting-rod component and middle four-connecting-rod components. The trolley comprises a foldable frame and wheels, wherein the foldable frame is formed by two symmetrical four-connecting-rod mechanisms connected by support rods; the unfolded foldable frame forms a trolley bin capable of containing objects, and a trolley top cover for protecting the objects in the trolley bin is arranged at the top of the trolley bin. The four-connecting-rod locking mechanism has the advantages that the three four-connecting-rod components are locked through one two-connecting-rod component to form a stable truss structure, full linkage among rods can be achieved by the mechanism, and fast folding and unfolding of the locking mechanism can be achieved effectively. In addition, the trolley has the advantages that the trolley can be pushed by hands and is small in floor space after folding, convenient to use, capable of achieving linkage, light and handy, stable and high in practicality.

Description

technical field [0001] The invention relates to the technical field of mechanical locking mechanisms, in particular to a four-link locking mechanism and a folding trolley using the mechanism. Background technique [0002] As we all know, the link mechanism is widely used in various mechanical equipment, such as appliances, supplies, etc., through the link mechanism to achieve predetermined actions and purposes, especially in foldable seats, bedding and outdoor furniture. [0003] At present, the link mechanism has been applied to various handcarts. Although the existing handcarts are all made up of wheels, chassis, fixed fence and push handles, their structural connections are different, so the effect and application places are also different. different. Existing trolleys are roughly divided into two categories, one is non-foldable trolleys, which are mostly used for transporting sundries or shopping, etc.; the other is foldable trolleys, most of which are used as baby carr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62B7/08
CPCB62B7/08B62B2205/06
Inventor 陈昭胜
Owner 陈昭胜
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