Intermittent drive device for ratchet wheel

A transmission device and ratchet technology, applied in transmission devices, belts/chains/gears, mechanical equipment, etc., can solve the problem of fast pawl wear and achieve the effect of small wear and long working time

Pending Publication Date: 2015-04-22
重庆市合川区均恒金属加工厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a ratchet intermittent transmission device to solve the problem of rapid pawl wear in the existing ratchet mechanism

Method used

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  • Intermittent drive device for ratchet wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Such as figure 1 As shown, a ratchet intermittent transmission device in this embodiment includes a frame 1, a ratchet 2, a compression spring 3, a control rod 4 and a cam 5 hinged on the frame 1, and the ratchet 2 is rotatably connected to the frame 1 . One end surface of the cam 5 is provided with a drive ring 7 along the circumference, the drive ring 7 is located at one half of the diameter of the addendum circle of the ratchet 2, the middle part of the control rod 4 is hinged on the frame 1, and the right end of the control rod 4 is against the cam 5 , The right end of the control rod 4 is provided with a roller, and the left end of the control rod 4 is provided with two upper and lower struts 6 . The included angle between the two struts 6 is greater than the angle corresponding to a ratchet on the ratchet 2, wherein the lower strut 6 is provided with a friction plate 8 that can be in contact with the drive ring 7, and the upper strut 6 is provided with a brake pa...

Embodiment 2

[0019] The difference between this embodiment and Embodiment 1 is that the compression spring is replaced by a tension spring, and one end of the tension spring is still connected to the frame 1, but the other end is connected to the position near the right end of the control rod 4, and the purpose is also to make the control The rod 4 and the cam 5 are always in a tight state.

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Abstract

The invention discloses an intermittent drive device for a ratchet wheel. The intermittent drive device for the ratchet wheel comprises a stand, a ratchet wheel, a control rod hinged to the stand, and a cam, wherein the ratchet wheel is rotationally connected with the stand, a drive ring is arranged on one head face of the cam along the circumferential direction, the middle of the control rod is hinged to the stand, one end of the control rod is propped against the cam, the other end of the control rod is provided with two support rods, the angle between the two support rods is larger than the angle corresponding to a ratchet on the ratchet wheel, wherein one support rod is provided with a friction plate capable of contacting with the drive ring, and the other support rod is provided with a brake ratchet. The friction plate is used for driving the ratchet wheel to move, and the brake ratchet is used for braking the ratchet wheel. The friction plate is in surface contact with the drive ring on the ratchet wheel, compared with the point contact of a pawl, the abrasion is small; the brake ratchet does not need to rotate reciprocally on the ratchet wheel, the abrasion to the brake ratchet is small, and therefore, a user does not need to frequently change the friction plate and brake ratchet, and the whole body has a longer working time.

Description

technical field [0001] The invention belongs to the technical field of ratchet intermittent transmission devices. Background technique [0002] The ratchet mechanism is a one-way intermittent motion mechanism composed of a ratchet wheel and a pawl. It is mainly composed of rocker, pawl (pawl) and external ratchet (external ratchet). The rocker is a motion input component, and the ratchet is a motion output component. When the rocker swings clockwise, the pawl hinged on the rod is inserted into the teeth of the ratchet, so that the ratchet rotates through a certain angle at the same time. When the rocker swings counterclockwise, the pawl slides over the teeth of the ratchet, and the ratchet stands still. Like this, when rocking bar is done continuous reciprocating swing, ratchet just obtains unidirectional intermittent rotation. [0003] Existing ratchet devices all realize the intermittent transmission of the ratchet through the swing of a ratchet, and the ratchet will b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H29/00
CPCF16H29/00
Inventor 张均
Owner 重庆市合川区均恒金属加工厂
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