CN2561763Y - Overload limiters - Google Patents

Abstract

The utility model discloses an overload limiter. The utility model includes a hand chain wheel, friction sheets, a pressing block B, a pressing block A, a load limiting spring, a key and a long shaft, one end of the long shaft is connected with the pressing block A by a thread, the pressing block B, the load limiting spring and a screw nut which is used for regulation of the pressure of the load limiting spring are sequentially arranged on the pressing block A along the axial direction, the hand chain wheel and two friction sheets are respectively arranged between the pressing block B and the pressing block A, and the key is arranged between the pressing block A and pressing block B. When a hand-operated chain hoist is overloaded, the friction force caused by overloading exceeds the preset valve of the load limiting spring and then the hand chain wheel skids and rotates idling, so as to play the load limiting protection function.

Description

Load limiter

One, technical field

The utility model relates to a kind of killer, and is especially relevant with the load limiter that is used for chain hoist (hereinafter to be referred as cucurbit).

Two, background technology

Existing chain hoist ubiquity such defective: use chain block during the weight of hoisting heavy not knowing, the user can't learn whether the chain block of working overloads, and chain block self can not send corresponding warning yet, and so just the personal safety to the user has constituted a kind of potential danger.

Three, summary of the invention

The purpose of this utility model provides and a kind ofly is intended to improve safety performance, and can uses the load limiter of the prompting that gives a warning to the chain block overload.

For achieving the above object, technical solution of the present utility model is: load limiter comprises bangle wheel, friction lining, briquetting second, the briquetting first, the limit for tonnage spring, nut, key and major axis, one end of major axis is equipped with the briquetting first by being threaded, briquetting second, limit for tonnage spring are housed on the briquetting first vertically successively and are used to regulate the nut of limit for tonnage spring pressure, bangle wheel and two friction linings are loaded on respectively between briquetting second and the briquetting first, and key is loaded between briquetting first and the briquetting second.

The utility model compared with prior art, have following distinguishing feature and good effect: (one) is the safe reliability height: the use in case appearance overloads when chain block, the automatic skid of bangle wheel meeting in the utility model, chain block quits work automatically, has guaranteed operator's personal safety; (2) be the prompting that gives a warning automatically: when the chain block overload was used, the bangle wheel skidded, and weight keeps original position not to be raised, and points out the user thus, and the chain block that is using is overloaded, could normally use behind the off-load of must taking measures.

Four, description of drawings

Fig. 1 is the structural representation of the utility model load limiter.

Five, the specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

As shown in Figure 1, load limiter comprises bangle wheel 1, friction lining 2, briquetting second 3, briquetting first 4, limit for tonnage spring 5, nut 6, key 7 and major axis 8, an end of major axis 8 is equipped with briquetting first 4 by being threaded, briquetting second 3, limit for tonnage spring 5 are housed on briquetting first 4 vertically successively and are used to regulate the nut 6 of limit for tonnage spring 5 pressure, 1 and two friction lining 2 of bangle wheel is loaded on respectively between briquetting second 3 and the briquetting first 4, and key 7 is loaded between briquetting first 4 and the briquetting second 3.Chain block is when the weight of lifting in the rated load weight, the pressure of limit for tonnage spring 5 is aligned a setting value by nut 6, because the effect of limit for tonnage spring 5 pressure, briquetting first 4, briquetting second 3, friction lining 2 and bangle wheel 1 are pressed into one, entire mechanism can be made cw or left-hand revolution together along with major axis 8, forms the normal operation of chain block thus; When the weight of hoisting heavy surpasses the rated load of chain block, because the required friction force between briquetting first 4, briquetting second 3, friction lining 2 and bangle wheel 1 that overload causes has surpassed the preset value of limit for tonnage spring 5, this moment, bangle wheel 1 can not drive friction lining 2 and briquetting first 4, briquetting second 3 are rotated together, so bangle wheel 1 is the skid state, chain block quits work, weight keeps original position motionless, plays the effect of limit for tonnage thus.

Claims (1)

1, a kind of load limiter, comprise bangle wheel (1), friction lining (2), briquetting second (3), briquetting first (4), limit for tonnage spring (5), nut (6), key (7) and major axis (8), it is characterized in that: an end of major axis (8) is equipped with briquetting first (4) by being threaded, briquetting second (3) is housed on briquetting first (4) vertically successively, limit for tonnage spring (5) and be used to regulate the nut (6) of limit for tonnage spring (5) pressure, bangle wheel (1) and two friction linings (2) are loaded on respectively between briquetting second (3) and the briquetting first (4), and key (7) is loaded on briquetting first (4), between the briquetting second (3).