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Differential device

A differential device and transmission shaft technology, applied in the field of fire doors, can solve the problems of rolling shutter accumulation or large pulling force, high power consumption and high cost, and achieve the effect of convenient use, low power consumption and low cost

Inactive Publication Date: 2017-06-09
王彩云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is driven by a motor, because the linear speed of the small sprocket remains unchanged, the diameter of the large sprocket gradually increases with the coiling of the roller blind, and the linear speed changes accordingly, so there is a speed difference between the large sprocket and the small sprocket , this will cause the accumulation of roller blinds or excessive tension. Although this problem can be solved by using two motors, using two motors will cause problems of high power consumption and high cost, which is inconvenient to use and promote.

Method used

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Embodiment Construction

[0011] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0012] see figure 1 and figure 2 , the front view and top view of the differential device, the differential device includes a housing 3, the housing 3 is located in a sleeve 7, the center of the housing is provided with a transmission shaft 6, and the transmission shaft 6 passes through The sleeve 7 is connected to a large sprocket 1, and the large sprocket 1 is connected to a small sprocket through a transmission chain 2. A spring leaf 4 is arranged in the housing, and one end of the spring leaf 4 is fixed on the On the transmission shaft 6, the other end is hooked on the inner edge of the housing 3, a sealing member is pressed between the outer wall of the housing and the inner wall of the sleeve, and a speed sensor is arranged on the transm...

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Abstract

The invention discloses a differential device. The device comprises a shell fixed to a sleeve, a transmission shaft is arranged in the center of the shell and connected with a large chain wheel, the large chain wheel is connected with a small chain wheel through a transmission chain, a leaf spring is arranged in the shell, one end of the leaf spring is fixed to the transmission shaft, and the other end of the leaf spring is hooked at the inner edge of the shell. A plurality of fixed blocks are evenly distributed on the inner edge of the shell, and the leaf spring is hooked on the fixed blocks. The leaf spring is fixed to the transmission shaft through a screw. A motor is used for opening and closing a roller shutter, the speed difference problem between the large chain wheel and the small chain wheel is solved, and the differential device is low in power consumption, low in cost and convenient to use.

Description

technical field [0001] The invention relates to a fireproof door, in particular to a differential device for a fireproof rolling door. Background technique [0002] Existing fire shutter doors include small sprockets, large sprockets and drive chains, which are driven by two motors to complete the shrinkage and extension of the fire shutters to realize the opening and closing of the fire doors. If it is driven by a motor, because the linear speed of the small sprocket remains unchanged, the diameter of the large sprocket gradually increases with the coiling of the roller blind, and the linear speed changes accordingly, so there is a speed difference between the large sprocket and the small sprocket , This will cause the accumulation of roller blinds or excessive tension. Although this problem can be solved by using two motors, the use of two motors will cause problems of high power consumption and high cost, which is inconvenient to use and promote. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H33/06E06B9/68
CPCF16H33/06E06B9/68E06B2009/6818
Inventor 不公告发明人
Owner 王彩云
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