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Worm-driven hand pulling block

A chain hoist and worm drive technology, applied in portable hoisting devices, hoisting devices, etc., can solve the problems of large body, inability to rotate 360°, and no chain guide device, etc., and achieve the effect of good strength and simple transmission mechanism

Pending Publication Date: 2018-01-19
CIXI JIEBAO ELEVATOR MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hand zipper case has no chain guide device and cannot be rotated 360°, so it is easy to get stuck when the hand zipper is pulled quickly
Due to the above structure, the whole body is very large, and it is inconvenient to carry, operate and maintain

Method used

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  • Worm-driven hand pulling block
  • Worm-driven hand pulling block
  • Worm-driven hand pulling block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Such as Figure 1-11 As shown, a chain hoist driven by a worm is suitable for lifting heavy objects of small tonnage, including a frame 2, a lifting sprocket 7 arranged in the frame, and a lifting sprocket wound around the lifting sprocket. Chain 5, the upper hook 1 fixed on the upper end of the frame, the lower hook 6 fixed on one end of the lifting chain, the hand chain wheel 3 connected to the lifting sprocket through the transmission mechanism, and the hand chain 4 is wound around the hand chain wheel. The transmission mechanism includes The worm 9 that rotates synchronously with the hand chain wheel is engaged with the worm gear 8, and the worm gear transmission is connected with the lifting sprocket 7. The worm 9 is set as a toroidal worm, and the lead angle of the worm is set within the self-locking angle. The worm gear...

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PUM

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Abstract

The invention relates to a worm-driven hand pulling block. The worm-driven hand pulling block comprises a rack, a lifting chain wheel arranged in the rack, a lifting chain wound on the lifting chain wheel, an upper hook fixedly arranged at the upper end of the rack, a lower hook fixedly arranged at one end of the lifting chain and a hand chain wheel which is connected with the lifting chain wheelthrough a transmission mechanism, wherein a hand pulling chain is wound on the hand chain wheel; the transmission mechanism comprises a worm which synchronously rotates along with the hand chain wheel; the worm is connected with a worm gear in an engaged mode; the worm gear is in transmission connection with the lifting chain wheel; the worm is set to be a ring-surface worm; and a lead angle of the worm is set to be within a self-locking angle. According to the worm-driven hand pulling block disclosed by the invention, through a connecting mode of the ring-surface worm and the worm gear, reverse braking is realized through a reverse self-locking function of the worm and the worm gear, and a plurality of parts are cancelled, so that the structure is simpler; and through a matching mode of the ring-surface worm and the worm gear, contact teeth are more, and connecting strength is better.

Description

technical field [0001] The invention relates to a chain hoist. Background technique [0002] Chain hoists are mostly used for lifting heavy objects, so they are widely used in industrial and mining enterprises, storage terminals, ship construction, bridge construction, film and television scene erection, transmission line erection, cargo transportation and other places. The existing chain hoist is mainly composed of a braking mechanism, a gear transmission mechanism, a lifting chain mechanism, a hand chain driving mechanism, an upper and lower hook, a housing, etc., and the braking mechanism is mainly composed of a friction plate, a ratchet, a pawl, and a pawl spring. , Brake seat and hand chain wheel. Braking is achieved by fitting the friction plate with the braking surface of the ratchet wheel, brake seat, and hand chain wheel. The structure is more complicated, and the friction plate sometimes breaks, which affects the reliability of braking. The gear transmission mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66D3/16
Inventor 梁荣王大铭
Owner CIXI JIEBAO ELEVATOR MACHINERY CO LTD
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