CN214299048U - Improved structure of load limiter for chain block - Google Patents

Abstract

The utility model discloses a chain block is with improvement structure of limit for tonnage ware, including brake disc and suit limit for the load friction disc, chain wheel, two dish reeds and one on the brake disc stabilize the spacer ring, be located the outside of dish reed and be fixed with a limit for the load adjusting nut on the brake disc, the bowl mouth mutual disposition of two dish reeds, and through stabilizing the sufficient contact of spacer ring between the bowl mouth of two dish reeds. The utility model discloses after addding stable space ring, make the bowl mouth of two dish reed fully contact, it can play the effect that prevents the mutual dislocation of dish reed well to stabilize the space ring, increase respectively and stabilize the area of contact of space ring after two dish reed, the installation dislocation that the people's naked eye can not see appears when both can effectively preventing the assembly of dish reed, can also stop the emergence of the mutual dislocation phenomenon of dish reed in the use, consequently, the work elasticity distribution of each dish reed is even, the axial atress is stable, the accumulative error is little, the wearing and tearing of each dish reed are relatively even, limit for tonnage stability and precision have been ensured.

Description

Improved structure of load limiter for chain block

[ technical field ] A method for producing a semiconductor device

The utility model relates to a chain block especially relates to a chain block is with improvement structure of limit for tonnage ware.

[ background of the invention ]

The chain block is taken as a common small-sized lifting device and is well known for flexibility and portability; the load limiter is an overload limiter as the name implies, and once an accident occurs during the overload operation of the chain block, the chain block can directly endanger the life safety and property loss of operators, so that the chain block is provided with the load limiter according to the requirements of safety regulations of hoisting machinery so as to ensure the operation safety of the chain block.

Taking a chain block with rated lifting capacity of one ton as an example, according to the technical requirements of the industry, the load limit value is 1.3 t-1.6 t, specifically, the weight of the chain block hanging is less than 1.3t, the chain block can meet the requirements of normal lifting and descending, namely, the chain block does not slip under friction transmission, when the load is more than or equal to 1.3t, the chain block can ensure that a chain wheel of the load limiter slips from a load limit friction plate, namely, the chain block cannot lift, and the chain block can ensure that a lifting chain wheel stops rotating, so as to avoid potential safety hazards.

The load limiter of the existing chain block comprises a brake disc, a load limiting friction plate, a hand chain wheel and two disc spring pieces, wherein after the two disc spring pieces are assembled on the chain block, the contact area between the two disc spring pieces is small, installation dislocation which cannot be seen by naked eyes of people is easy to occur, the phenomenon that the disc spring pieces are staggered mutually also exists in the actual use process, the working elastic force distribution of each disc spring piece is uneven, the axial stress stability is poor, the abrasion of each disc spring piece is uneven, the load limiting stability and the load limiting precision of the chain block are influenced, and therefore the load limiter of the existing chain block is necessary to improve.

[ Utility model ] content

The utility model aims at providing a chain block is with improvement structure of limit for tonnage ware to above-mentioned prior art not enough.

Therefore, the utility model provides a following technical scheme:

the utility model provides an improvement structure of limit for load ware for chain block, includes the brake disc and suit in proper order a slice limit for load friction disc, a hand sprocket, two dish reeds on the brake disc, is located the outside of dish reed and is fixed with a limit for load adjusting nut on the brake disc, and its improvement point lies in: the brake disc further comprises a stable space ring sleeved on the brake disc, the bowl openings of the two disc spring pieces are arranged oppositely, and the bowl openings of the two disc spring pieces are in full contact through the stable space ring.

The brake disc is a flange type brake disc and comprises a disc body and a flange formed by axial necking of one side of the disc body, the load limiting friction plate, the hand chain wheel, the disc spring plate, the stable spacer ring and the load limiting adjusting nut are mounted on the flange together, and two sides of the load limiting friction plate face the disc body and the hand chain wheel respectively.

The load limiting adjusting nut is a slotted nut and is fixed through a stop washer sleeved on the flange.

Compared with the prior art, the utility model has the advantages of as follows and positive effect:

after the stable space ring is additionally arranged on the basis of the structure of the load limiter of the existing chain block, the bowl openings of the two disc spring pieces are in full contact, the stable space ring can well play a role of preventing the disc spring pieces from being staggered mutually, after the contact area between the two disc spring pieces and the stable space ring is increased respectively, the mounting dislocation which cannot be seen by naked eyes can be effectively prevented when the disc spring pieces are assembled, the bowl openings of the two disc spring pieces are in full contact with the stable space ring respectively, the phenomenon that the disc spring pieces are staggered mutually in the use process can be avoided, therefore, the working elastic force of each disc spring piece is uniformly distributed, the axial stress is stable, the accumulated error is small, the abrasion of each disc spring piece is relatively uniform, and the high load limiting stability and the high load limiting precision of the chain block are ensured.

[ description of the drawings ]

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the load limiter for the chain block of the present invention;

fig. 2 is an enlarged view of the combination state of the stable space ring and the two disc reeds of the present invention.

[ detailed description ] embodiments

Referring to fig. 1 and 2, an improved structure of a load limiter for a chain block comprises a brake disc 1, a load limiting friction plate 2, a hand chain wheel 3, two disc springs 4, and a load limiting adjusting nut 5, wherein the load limiting friction plate 2, the hand chain wheel 3, the two disc springs 4 are sequentially sleeved on the brake disc 1, the load limiting adjusting nut is fixed on the brake disc and is positioned outside the disc springs, and the improvement point is that: still including the suit stabilize spacer ring 6 on brake disc 1, the bowl mouth of two dish spring pieces 4 is arranged relatively, and fully contacts through stabilizing spacer ring 6 between the bowl mouth of two dish spring pieces 4.

The stable spacing ring 6 is positioned between the two disc spring pieces 4, and the stable spacing ring 6 is respectively and fully contacted with the bowl mouth of each disc spring piece 4.

The brake disc 1 is a flange type brake disc having a disc body 10 and a flange 11 formed by axially necking one side (shown as left side in fig. 1) of the disc body 10, and a load-limiting friction plate 2, a hand sprocket 3, a disc spring 4, a stabilizer spacer 6, and a load-limiting adjusting nut 5 are mounted together on the flange 11, wherein both sides of the load-limiting friction plate 2 face the disc body 10 and the hand sprocket 3, respectively.

The inner side surface of the plate body 10 faces the load limiting friction plate 2, and the end surface faces the brake device of the chain block in the prior structure.

The load limiting adjustment nut 5 is a slotted nut which is secured by a stop washer 7 which is sleeved over a flange 11.

The utility model discloses when specifically installing chain block on, earlier with 1 transmission threaded connection of brake disc to lever block's major axis (publicly known), after that in proper order toward installing a slice limit for the load friction disc 2, a hand sprocket 3, a dish reed, a slice stable spacer 6, another dish reed, lock washer 7 on flange 11, will limit for the load adjusting nut 5 at last and fix through lock washer 7 after revolving to flange 11.

The disc reed arranged inside and outside respectively supports against the hand chain wheel 3 and the load-limiting adjusting nut 5.

When the two disc spring leaves bear axial pressure, the outer diameter of each disc spring can change slightly, after the stable space ring 6 is configured, the disc spring leaves can be effectively prevented from being staggered, and the inner side surfaces of the two disc spring leaves opposite to each other can still be in full contact with the stable space ring 6 respectively.

Claims (3)

1. The utility model provides an improvement structure of limit for load ware for chain block, includes the brake disc and a slice limit for load friction disc, a hand sprocket, two dish reeds of suit on the brake disc in proper order, is located the outside of dish reed and is fixed with a limit for load adjusting nut, its characterized in that on the brake disc: the brake disc further comprises a stable space ring sleeved on the brake disc, the bowl openings of the two disc spring pieces are arranged oppositely, and the bowl openings of the two disc spring pieces are in full contact through the stable space ring.

2. The improved structure of the load limiter for the chain block according to claim 1, wherein: the brake disc is a flange type brake disc and is provided with a disc body and a flange formed by axial necking at one side of the disc body, the load limiting friction plate, the hand chain wheel, the disc spring plate, the stable spacer ring and the load limiting adjusting nut are mounted on the flange together, and two sides of the load limiting friction plate face the disc body and the hand chain wheel respectively.

3. The improved structure of the load limiter for the chain block according to claim 2, wherein: the load-limiting adjusting nut is a slotted nut and is fixed through a stop washer sleeved on the flange.

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