CN2154851Y

CN2154851Y - Hand hoist

Info

Publication number: CN2154851Y
Application number: CN 92241476
Authority: CN
Inventors: 傅喜廷; 马铁民; 王军
Original assignee: BEIJING HOIST TOOL FACTORY
Current assignee: BEIJING HOIST TOOL FACTORY
Priority date: 1992-11-21
Filing date: 1992-11-21
Publication date: 1994-02-02
Anticipated expiration: 2002-11-21

Abstract

The utility model discloses a hand hoist, i.e. the toothed gear and the contour design of the toothed gear in the machine body component of the HSZ-80A hand hoist series. The utility model is characterized in that the center distance of the toothed gears is the same as the HS hand hoist series, and the toothed gear number is odd. The designs of the toothed gear parameter, the toothed gear ratio and the contour in the equal lateral arc equiangular triangle machine body component are unique. The utility model has the comprehensive effects of small volume, light weight, advanced performance, high reliability, easy use, high durability and beautiful appearance.

Description

Hand hoist

The utility model relates to a kind of lifting gear, i.e. gear and configuration design thereof in the HSZ-80A chain block series cylinder block set.

Usually, chain block is by hook device, down cargo hook gear, cylinder block set, hoisting chain and pull five parts such as chain and form.The stressed Transmission of cylinder block set adopts the spur-geared structure of symmetric offset spread secondary.

Because it is little, in light weight, easy to carry, simple to operate that chain block has a volume, pull the characteristics that chain promotes weight rapidly with the single power that pulls with regard to stretchy, so it is a kind of broad-spectrum hand crane tool, especially under the narrow and small and power free situation in operation place, more demonstrate its preceence.

Yet, production both at home and abroad at present and the various chain blocks that use, in its cylinder block set one, secondary gear transmission design, at determining of transmitting ratio, the number of teeth, modulus, pressure angle of graduated circle select aspect such as selected with the actual gear width between centers for use, all exist some problem and shortage, and make chain block produce galloping thus, gear teeth application stress is big, safe and reliable property is poor, on the other hand, when module of gear and transmission when gear center apart from design when big slightly, though its transmission quality and intensity are improved, but cause the cylinder block set profile too big, ineffective shortcoming, this is the combined symptoms place of the big heaviness of some chain block body just.In addition, the profile of existing chain block cylinder block set, great majority are the stiff design of full circle shape, though have non-circular, manufacturing process complexity, and unelegant attractive in appearance.Therefore, to the profile of chain block cylinder block set, make the form Artline, the simple novel appearance design of well arranged, manufacturing process also is an important problem.

The utility model is at the gear driving member in the above-mentioned chain block cylinder block set and the existing problem of outward appearance thereof and the HSZ-80A chain block series of a kind of novelty of design-calculated.Now be described in detail as follows in conjunction with Figure of description:

Accompanying drawing 1 is the cylinder block set assembling scheme drawing of HSZ-80A chain block series.The A-A cutaway view in left side is expressed the gear in this cylinder block set among the figure, is to adopt symmetric offset spread secondary spur gear transmission.Among the figure, five tooth major axis 7 are formed first order transmission with left and right two identical plate gears 8, and two the five tooth minor axises 9 that are fitted on the plate gear 8 are formed second stage transmission with splined hole gear 10.As shown in the figure: pulling pulls chain 1 and promptly drives five tooth major axis 7, plate gear 8 and five tooth minor axises 9,10 rotations of splined hole gear, and hoisting chain 4 just rises thereupon or descends, thereby promotes or transfer weight.Characteristics of the present utility model are: be installed in each gear between Side fascia 11 and the right wallboard 5, its gear center adopts correspondingly-sized and the precision of the domestic HS chain block series of having produced in enormous quantities about part apart from complete series; Module of gear is 2.75-3.25; Each gear compound graduation circle angle of obliquity is 25 °; The gear multiplication of three kinds of types of complete series is respectively 17.64,25,33.48.The number of teeth of each gear is all selected odd number for use.This design has following characteristics:

The one, gear center has been saved new production tooling apart from identical with HS chain block series, is easy to realize batch manufacturing; The 2nd,, reach under the condition that volume requirement is little, deadweight is light again at chain block, guarantee that the application stress of the strength of gear teeth, the gear teeth is little, thereby improved the safety and reliability and the practicality of product; The 3rd, the gear-driven overlap coefficient in the second stage reaches more than 0.93, letter the is light impact of product running, the stationarity when having improved lifting; The 4th, the gear number of teeth all adopts odd number, and plate gear 8 is united two into one for two kinds by unreduced plate gear first and second, has made things convenient for the processing process and the part management formality of plate gear 8.

Accompanying drawing 2 is the projection view of the bangle wheel case 2 in the accompanying drawing 1, by diagram as can be known, its characteristics are: the equilateral triangle design that to adopt equilateral arc radius be R, its three sharp corner is 120 ° of angles, do arc and adjacent tangent connection of two straight flanges with minor radius r, for improving the rigidity and the intensity of bangle wheel case 2, its bottom periphery adopts the form of R1.5 flange, the shape of the left wallboard 3 in the size behind its flange, shape and the accompanying drawing 1 is same entirely, thereby makes the bangle wheel case 2 and the fixing means of left wallboard 3 change butt joint type into by general plug-in type.In view of above design, changed the stiff shape of general cylinder block set full circle shape fully, and reached form Artline, the simple novel appearance designing requirement of manufacturing process.

Accompanying drawing 3 is the projection view of the case 6 in the accompanying drawing 1, by diagram as can be known, its configuration design and bangle wheel case 2 is equal to, but the oblong step that matches in the shape of one of its short transverse protrusion and Side fascia 11, at the recess of oblong step, making product nameplate is installed.See that on the whole the design of this case 6 has compact and unique novel moulding.

Claims

1, a kind of chain block, by case, be positioned at the secondary transmission gear of case, bangle wheel cover and the parts such as bangle wheel that are positioned at the bangle wheel cover are formed, it is characterized in that five tooth major axis 7 and left and right two identical plate gears, 8 composition first order transmissions, two the five tooth minor axises 9 that are fitted on the plate gear are formed second stage transmission with splined hole gear 10, and gear center adopts correspondingly-sized and the precision of the domestic HS chain block series of having produced in enormous quantities about part apart from complete series; Module of gear is: 2.75～3.25, and each gear compound graduation circle angle of obliquity is 25 °.

2, chain block as claimed in claim 1 is characterized in that gear multiplication is 17.64.

3, chain block as claimed in claim 1 is characterized in that gear multiplication is 25.

4, chain block as claimed in claim 1 is characterized in that: gear multiplication is 33.48.

5, chain block as claimed in claim 1, it is characterized in that: bangle wheel cover and case are equilateral circular arc equilateral triangle, and wherein the arc radius is R, and its three sharp corner is 120 ° of angles, make arc and the tangent edge joint of adjacent two straight flanges with minor radius r, bottom periphery adopts the R1.5 flange.