Light-load lever block and brake mechanism thereof
A technology of lever block and braking mechanism, which is applied in portable hoisting devices, hoisting devices, etc., can solve problems such as uneven release of braking force, achieve the effect of reducing heat attenuation effect and improving heat dissipation effect
Active Publication Date: 2016-11-09
维多利科技(江苏)有限公司
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Problems solved by technology
However, the thermal attenuation of this braking structure is very obvious, and the braking force is released unevenly.
Method used
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[0022] The standard parts used in the present invention can be purchased from the market, and the special-shaped parts can be customized according to the instructions and the accompanying drawings. The specific connection methods of each part adopt mature bolts, rivets, welding in the prior art , pasting and other conventional means, no longer described in detail here.
[0023] refer to Figure 1-6 , a specific embodiment of the present invention includes a lifting sprocket 1, the lifting sprocket 1 is sleeved on a major axis 2, a brake disc 3 is fixedly connected to the major axis 2, and a ratchet 4 is sleeved on the brake disc 3, A reversing ratchet 5 is sleeved on the long axis 2, and a handwheel 6 is connected to the reversing ratchet 5. A positioning seat 7 is fixed on the inside of the handwheel 6. The positioning seat 7 is connected with the inner wheel 9 of the handwheel through a spring positioning bead 10. A handwheel spring 8 is connected between the wheel 6 and th...
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The invention discloses a brake mechanism of a light-load lever block. The brake mechanism comprises a lifting chain wheel; the lifting chain wheel coats a long shaft; the long shaft is fixedly connected with a brake disc; the brake disc is coated with a ratchet wheel; the long shaft is coated with a steering ratchet wheel; the steering ratchet wheel is connected with a hand wheel; a positioning base is fixed on the inner side of the hand wheel, and is connected with a hand wheel inner wheel through a spring positioning ball; a hand wheel spring is connected between the hand wheel and the hand wheel inner wheel; an annular hole is formed in the contact surface of the ratchet wheel and the steering ratchet wheel; a rotating wheel is arranged in the annular hole; multiple parallel first ventilation grooves are formed between the bottom surface of the ratchet wheel and the rotating wheel; the rotating wheel is provided with multiple parallel second ventilation grooves; included angles between the first ventilation grooves and the second ventilation grooves are 20-40 degrees; the steering ratchet wheel is provided with a pin column selectively inserted in the annular hole; and the pin column and the rotating wheel are in clearance fit. The brake mechanism can improve the defects in the prior art, reduces the heat attenuation problem, and improves the release uniformity of braking force.
Description
technical field [0001] The invention relates to a mechanical hoisting mechanism, in particular to a light-load lever hoist and its braking mechanism. Background technique [0002] Lever block is a manual lifting tool that is easy to use and easy to carry. The lever hoist can be used for lifting, pulling, lowering, calibrating and other operations. The lifting capacity generally does not exceed 50T, and is widely used in equipment installation, item lifting, and mechanical parts pulling in shipbuilding, electric power, transportation, construction, mining, post and telecommunications and other industries. [0003] At present, due to the structure of the general lever hoist braking device, when the load is less than 10% of the rated load or no load, there will be a phenomenon that the load cannot be lifted or the load will fall freely and the brake will fail. This is the lightness of the lever hoist. Due to this feature, there are certain defects in the use of the lever bloc...
Claims
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IPC IPC(8): B66D5/02B66D5/14B66D3/12
CPCB66D3/12B66D5/023B66D5/14B66D2700/0183
Inventor 张景东
Owner 维多利科技(江苏)有限公司