CN218000282U - Hollow pin shaft lifting chain - Google Patents

Abstract

The utility model discloses a hollow pin axle lifting chain, including a plurality of chain links, inner link board and outer link board, the chain link both sides divide through inner link board or outer link board and adjacent chain link connection, and every chain link all includes round pin axle, sleeve and roller, and the roller all rotates with the inner link board that sets up respectively outside the roller both ends and sets up on the sleeve, still includes hollow pin axle, and hollow pin axle clearance fit is in the sleeve, and round pin axle clearance fit is in hollow pin axle, and two outer link boards set up respectively in the sleeve both ends outside and close-fitting at hollow pin axle both ends. The hollow pin shaft is additionally arranged between the sleeve and the pin shaft, so that the maintenance means is convenient and quick after the pin shaft is seriously worn; when the chain is assembled, the press-fitting stroke is short, and the requirements on a press machine and a tool are low; the split pin type fixing mode ensures that the accessories are not easy to fall off, reduces the frequency of replacing parts and prolongs the service life of the chain; the abrasion resistance degree is greatly improved.

Description

Hollow pin shaft lifting chain

Technical Field

The utility model belongs to the technical field of the chain technique and specifically relates to a hollow pin axle hoisting chain is related to.

Background

The chain usually includes a plurality of chain links of mutual lock, and wherein the occasion that the lifting chain used is heavy load, high strength industry transportation environment, leads to the round pin axle among the chain link often wearing and tearing in the use, and wherein the round pin axle wearing and tearing of bearing chain link are the most frequent, often need to change and lead to delay production. On the other hand, because the existing chain is heavy in weight and large in size, and the outer chain plate of the existing chain and the pin shaft are in a close fit mode, the worn pin shaft is inconvenient to disassemble and replace. In addition, in the chain assembling stage, the length of the pin shaft provided with the roller is long, the pin shaft is tightly matched with the outer chain plate, a long stroke is realized when the pin shaft is pressed to a specified position, a large-tonnage press machine and a large-tonnage tool are needed, and high requirements on the tool and equipment are met.

For example, a multi-station suspension type stereo garage lifting chain disclosed in chinese patent literature, whose application number is CN202020824167.0, includes an upper outer chain plate, inner chain plates are respectively arranged at the lower parts of the two ends of the upper outer chain plate, rollers are arranged inside the inner chain plates, a lower outer chain plate is arranged below the inner chain plates, a pin shaft penetrates through the upper outer chain plate, the upper part of the inner chain plate, the rollers, the lower part of the inner chain plate and the lower outer chain plate in sequence, a plurality of deep groove ball bearings are arranged between the pin shaft and the rollers, a half-cone rivet penetrates through the lower part of the pin shaft, and a hexagonal slotted nut is screwed on the half-cone rivet. The defects that the pin shaft is inconvenient to disassemble and replace, and the assembly of the chain has higher requirements on the tool and the equipment.

Disclosure of Invention

The utility model relates to an it is inconvenient to overcome current lifting chain and tear open and trade, and the problem that the equipment chain required height provides a hollow pin axle lifting chain, tears open and trades the convenience, and the equipment chain requires lowly to the construction installation equipment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a hollow pin axle lifting chain, includes a plurality of chain links, inner link board and outer link board, and the chain link both sides divide through inner link board or outer link board and adjacent chain link connection, and every chain link all includes round pin axle, sleeve and roller, and the roller all rotates with the inner link board that sets up respectively outside the roller both ends and sets up on the sleeve, still includes hollow pin axle, hollow pin axle clearance fit is in the sleeve, round pin axle clearance fit is in hollow pin axle, and two outer link boards set up respectively in the sleeve both ends outside and close-fitting at hollow pin axle both ends.

The utility model discloses a characteristics lie in having add hollow pin axle between sleeve and round pin axle, hollow pin axle and round pin axle clearance fit, will be originally change with the outer link joint of round pin axle tight fit into with hollow pin axle tight fit, after this has just made the round pin axle appear serious wearing and tearing, the maintenance means is convenient quick, will need the round pin axle top of replacement usefulness in former round pin epaxially after round pin axle wearing and tearing, at last through knocking the round pin axle of replacement usefulness, because round pin axle and hollow pin axle clearance fit, new round pin axle will be old round pin axle release hollow pin axle and insert wherein, can accomplish the change. In addition, in the chain assembling stage, the end part of the hollow pin shaft and the outer chain plate only need to be flattened, the press fitting stroke is short, the subsequent hollow pin shaft and the pin shaft are in clearance fit, the overall assembling difficulty is greatly reduced, and the requirement on a press machine and a tool is low.

Preferably, the chain link comprises a non-wheel chain link and a belt wheel chain link, two ends of a pin shaft of the belt wheel chain link extend outwards towards the hollow pin shaft and are rotatably connected with idler wheels, and the idler wheels are arranged on one side, far away from the inner chain plate, of the outer chain plate.

The two ends of the pin shaft of the partial chain links are not provided with idler wheels, and the two ends of the pin shaft of the partial chain links extend in the axial direction and are provided with idler wheels for being matched with structures such as external guide rails and the like, so that the friction force is reduced.

Preferably, split pins are respectively inserted at two ends of the pin shaft and are arranged on one side of the roller far away from the outer chain plate.

The two ends of the existing pin shaft are usually fixed through shaft clamps, particularly, for the pin shaft with a belt wheel chain link with a large load, the condition that the shaft clamp falls off sometimes occurs, if the situation is found that accessories such as a bearing, a spacer bush and the like fall off untimely, related equipment is damaged by smashing to influence production, and the split pin is ensured to be not easy to fall off and be fixed more stably by changing a clamping type fixing mode into a splicing split pin.

Preferably, a gasket is arranged between the cotter pin and the roller, and the gasket is sleeved on the pin shaft.

Avoid the cotter pin and the roller to generate friction.

Preferably, the two ends of the pin shaft of the wheel-free chain joint are respectively clamped with a shaft clamp, and the shaft clamps are attached to the end faces of the hollow pin shafts.

The load of the non-wheel chain joint is small, the clamping type fixing is convenient, and the weight is light.

Preferably, two adjacent belt wheel chain links are connected through a bearing chain plate, and the bearing chain plates are connected and fixed through a connecting plate.

The bearing chain plates between two adjacent belt wheel chain links are used for being connected with a structure to be lifted, are conveniently connected with an external structure through the L-shaped bearing chain plates, and are connected through welding to increase the strength.

Preferably, the surface of the pin shaft of the belt wheel chain link is provided with a high-frequency quenching layer.

The abrasion of the pin shaft of the bearing chain link is the most serious, and the abrasion resistance of the bearing chain link is improved by performing high-frequency quenching on the circumferential surface of the pin shaft.

Therefore, the utility model discloses following beneficial effect has: (1) The hollow pin shaft is additionally arranged between the sleeve and the pin shaft, so that the maintenance means is convenient and quick after the pin shaft is seriously worn; (2) When the chain is assembled, the press-fitting stroke is short, the subsequent hollow pin shaft and the pin shaft are in clearance fit, the overall assembly difficulty is greatly reduced, and the requirements on a press machine and a tool are low; (3) The split pin type fixing mode ensures that the accessories are not easy to fall off, reduces the frequency of replacing parts and prolongs the service life of the chain; and (4) the abrasion resistance degree is greatly improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the wheel-less chain link of the present invention.

Figure 3 is a cross-sectional view of the inventive pulley link.

In the figure: 1. the inner chain plate, 2, the outer chain plate, 3, the pin shaft, 31, the split pin, 32, the shaft clamp, 33, the gasket, 4, the sleeve, 5, the roller, 6, the hollow pin shaft, 7, the roller, 8, the bearing chain plate, 81 and the connecting plate.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

In the embodiment shown in fig. 1, a hollow pin lift chain comprises a plurality of chain links, an inner link plate 1 and an outer link plate 2. The adjacent chain links are connected through two inner chain plates and two outer chain plates, and the inner chain plates and the outer chain plates are respectively arranged on two sides of the chain links. The chain links comprise wheel-free chain links and belt wheel chain links, the wheel-free chain links shown in figure 2 comprise pin shafts 3, sleeves 4, rollers 5 and hollow pin shafts 6, the hollow pin shafts 6 are sleeved outside the pin shafts 3, the pin shafts 3 are in clearance fit with the hollow pin shafts 6, shaft clamps 32 are clamped at two ends of the pin shafts 3 respectively, and the shaft clamps 32 are attached to the end faces of the hollow pin shafts 6. The hollow hinge pin 6 overcoat is equipped with sleeve 4, and the sleeve 4 overcoat is equipped with roller 5 and two inner link plates 1, and two inner link plates 1 set up respectively in the roller 5 both ends outside, and hollow hinge pin 6 still is equipped with two outer link plates 2 outward, and two outer link plates 2 tight fit respectively are at hollow hinge pin 6 both ends, and outer link plate 2 forms the clearance with sleeve 4, inner link plate 1, and outer link plate 2 lateral surface and hollow hinge pin 6 terminal surface parallel and level.

As shown in fig. 3, compared with a non-wheel chain link, two ends of a pin shaft 3 extend outwards, a roller 7 is rotatably arranged at the end of the pin shaft 3, split pins 31 are respectively inserted at two ends of the pin shaft 3 outside the roller 7, a gasket 33 is arranged between the split pins 31 and the roller 7, and the gasket 33 is sleeved on the pin shaft 3.

As shown in fig. 1, two adjacent belt wheel links are connected through a bearing chain plate 8, at this time, the bearing chain plate 8 is used as an outer chain plate, the whole bearing chain plate 8 is L-shaped, two bearing chain plates 8 are welded and fixed through two connecting plates 81, and the two connecting plates 81 are vertically arranged. The surface of the pin shaft 3 on the chain link connected with the bearing chain plate 8 is provided with a high-frequency quenching layer, and the high-frequency quenching layer is arranged on the surface of the pin shaft 3 between two rollers 7 (including the roller covered).

The utility model greatly improves the wear resistance degree through high-frequency quenching, and ensures that the accessories are not easy to fall off through the arrangement of a more stable cotter pin structure, thereby reducing the times of replacing parts, prolonging the service life of the chain and improving the economic benefit; because the pin shaft is in clearance fit with the rest structures of the chain, the pin shaft to be replaced is propped against the original pin shaft after being worn, and finally the replacement can be completed by knocking the pin shaft to be replaced; in the chain assembling stage, the hollow pin shaft and the outer chain plate are flattened, the press fitting stroke is short, the subsequent fit of the hollow pin shaft and the pin shaft is a loose fit with a small gap, the overall assembling difficulty is greatly reduced, and the requirement on a press machine and a tool is low.

Claims (7)

1. The utility model provides a hollow pin axle lifting chain, includes a plurality of chain links, inner link board (1) and outer link board (2), and the chain link both sides divide through inner link board (1) or outer link board (2) and adjacent chain link connection, and every chain link all includes round pin axle (3), sleeve (4) and roller (5), and roller (5) all rotate with inner link board (1) that sets up respectively outside roller (5) both ends and set up on sleeve (4), characterized by still includes hollow pin axle (6), hollow pin axle (6) clearance fit is in sleeve (4), round pin axle (3) clearance fit is in hollow pin axle (6), and two outer link boards (2) set up respectively in sleeve (4) both ends outside and tight fit at hollow pin axle (6) both ends.

2. A hollow-pin hoisting chain according to claim 1, characterized in that the chain links comprise a non-wheel chain link and a belt wheel chain link, the two ends of the pin (3) of the belt wheel chain link extend out of the hollow pin (6) and are rotatably connected with rollers (7), and the rollers (7) are arranged on the side of the outer link plate (2) away from the inner link plate (1).

3. A hollow-pin lift chain according to claim 2, characterized in that a cotter pin (31) is inserted at each end of the pin (3), said cotter pin (31) being arranged on the side of the roller (7) remote from the outer link plate (2).

4. A hollow-pin lifting chain according to claim 3, characterized in that a washer (33) is arranged between the cotter pin (31) and the roller (7), said washer (33) being fitted over the pin (3).

5. The hollow pin shaft lifting chain as claimed in claim 2, wherein the two ends of the pin shaft (3) of the non-wheel chain link are respectively clamped with a shaft clamp (32), and the shaft clamps (32) are attached to the end surfaces of the hollow pin shaft (6).

6. A hollow-pin hoisting chain according to any of claims 2-5, characterized in that two adjacent pulley links are connected by a load-bearing link plate (8), and the load-bearing link plates (8) are connected and fixed by a connecting plate (81).

7. A hollow-pin lift chain according to claim 6, characterized in that the surface of the pin (3) of the pulley link is provided with a high-frequency quenching layer.

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