A chain retractable device

A technology of retractable device and chain, which is applied to the parts of the binding machine, etc., can solve problems such as ramming and safety hazards, and achieve the effect of improving stability and safety

Active Publication Date: 2016-03-02
ZHEJIANG TOPSUN LOGISTIC CONTROL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When in use, fix the upper and lower hooks of the hand chain tensioner to tighten the goods. When the chain is manually tightened, turn the handle to further tighten the chain. force, and the force gradually increases during the process of tightening the chain; when the chain needs to be loosened, reverse the handle to disengage the worm from the worm wheel, and the force directed to the housing will slowly be consumed during this process, However, since the stroke of the worm and the worm wheel is fixed, when the worm and the worm wheel are completely disengaged, the force pointing to the housing may not be consumed. At this time, the fixed end of the chain will rush towards the housing or have a direction towards the housing. The direction is rushing towards the building, and there is a big security risk

Method used

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  • A chain retractable device
  • A chain retractable device
  • A chain retractable device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Such as figure 1 , figure 2 and image 3 As shown, the retractable device of the chain is composed of a cavity inside the housing 1, the worm 2, the worm wheel 3, the rotating shaft 4, the pawl 16, the elastic member, and the ratchet handle 5 {see for details: two-way ratchet 10 wrench [application number: 201120164696.3; authorized announcement number: CN202129748U]} and other components.

[0054] Among them, such as figure 1 As shown, the housing 1 is composed of an upper housing 1a, a middle housing 1b and a lower housing 1c which are fixedly connected to each other. The inner side of the upper end of the middle casing 1b is provided with a support 6, and the number of the support 6 is two and the positions are opposite. The fastener passes through the upper casing 1a and the middle casing 1b and is fixed on the support 6, and the other side of the support 6 is also fixed on the upper end of the middle casing 1b by the fastener. The fastener can be a bolt, a scr...

Embodiment 2

[0071] The structure and principle of this embodiment are basically the same as that of Embodiment 1, the difference is that the elastic member is a torsion spring, and the torsion spring is sleeved on the gear shaft 17, one end of the torsion spring acts on the pawl 16, and the other end is fixed Be connected on the worm wheel 3 sides. And under the action of the torsion spring, the ratchet 16 always has a tendency to be embedded in the ratchet of the ratchet 10 .

Embodiment 3

[0073] The structure and principle of this embodiment are basically the same as that of Embodiment 1, the difference is that the toggle member is a pressing plate, which is hinged on the side of the ratchet 10 on the worm wheel 3, and the pressing plate can be away from the contact by rotating around the hinge point. The first part 16a or the first contact part 16a abuts against the elastic force of the elastic member to make the second contact part 16b disengage from the ratchet 10 . The shell 1 has a circular opening on the surface, and the pressing plate includes a handle portion and an abutting portion for contacting with the ratchet of the ratchet 16 , and the handle portion partially protrudes from the opening. The handshake part protrudes from the opening, and the hand holds the part of the handshake part outside the housing to facilitate the rotation of the pressing plate.

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PUM

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Abstract

The invention provides a retracting and releasing device for a chain and belongs to the technical field of machines; the problem that a traditional hand chain tensioner is unsafe when the chain is loosened is solved by the retracting and releasing device provided by the invention. The retracting and releasing device for the chain comprises a shell of which the interior is a cavity; a revolving shaft is arranged in the shell; one end of the revolving shaft is fixedly connected with a chain wheel; the chain is twined on the chain wheel; both ends of the chain respectively extend out of the shell, and one of both ends of the chain is fixedly connected with a hook I; a worm is also axially and fixedly connected with the interior of the shell; the outer end of the worm extends out of the shell, and is connected with a handle; the other end of the revolving shaft is fixedly connected with a ratchet wheel; the revolving shaft is sheathed with a worm wheel, and the worm wheel is meshed with the worm; the side part, located on the ratchet wheel, of the worm wheel is hinged to a pawl; an elastic part for enabling the pawl to have a tendency of being embedded into ratchets of the ratchet wheel is arranged between the pawl and the worm wheel; the pawl is also provided with a shifting part; the shifting part is shifted through an external force, so that the elasticity of the elastic part can be overcome by the pawl, and the pawl is separated from the ratchets of the ratchet wheel. The retracting and releasing device for the chain has the advantages of simple in structure, and safe when the chain is loosened.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a retractable and retractable device for chains. Background technique [0002] In logistics operations, it is necessary to bundle the goods to prevent the goods being transported from being damaged or lost due to bumps and vibrations during transportation. A chain tensioner is one such tool used to tie cargo. [0003] For example, the driving mechanism of a hand chain tensioner proposed by the applicant [application number: 201220367023.2; authorized announcement number: CN202783850U], which includes a housing with a cavity inside, and a chain that can be rotated and the chain is wound inside the housing. The driving mechanism includes a rotating handle, a worm, a worm wheel and a guide. The rotating handle is axially fixed on the housing, the worm wheel is fixedly connected with the sprocket, and the worm is fixed circumferentially with the rotating handle. When meshing, the g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65B13/22
Inventor 牛胜良
Owner ZHEJIANG TOPSUN LOGISTIC CONTROL CO LTD
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