CN105460805A

CN105460805A - Optimized crane

Info

Publication number: CN105460805A
Application number: CN201610017958.0A
Authority: CN
Inventors: 周磊
Original assignee: Individual
Current assignee: Huzhou Yufan Cosmetic Technology Co ltd
Priority date: 2014-06-25
Filing date: 2014-06-25
Publication date: 2016-04-06
Anticipated expiration: 2034-06-25
Also published as: CN105417407B; CN105480877B; CN105417407A; CN104071708B; CN105460804A; CN105565187A; CN105565187B; CN105460805B; CN104071708A; CN105460804B; CN105480877A

Abstract

The invention discloses an optimized crane. A plurality of lightening holes are formed within regions, where holes can be formed, of sidewalls of a boom of the optimized crane; a minimum distance between a left contour of each region where holes can be formed and a left contour of each sidewall of the boom is 1/10 to 1/9 of a longitudinal maximum size of the sidewall of the boom; a minimum distance between a right contour of each region where holes can be formed and a right contour of each sidewall of the boom is 1/10 to 1/9 of the longitudinal maximum size of the sidewall of the boom; a maximum distance between an upper contour of each region where holes can be formed and an upper contour of each sidewall of the boom is 1/4-1/3 of a transverse maximum size of the sidewall of the boom; a maximum distance between a lower contour of each region where holes can be formed and a lower contour of each sidewall of the boom is 1/4-1/3 of the transverse maximum size of the sidewall of the boom; each lightening hole is an elliptical hole, and a minor axis of the elliptical hole is 1/4-1/3 of the transverse maximum size of each sidewall of the boom, while a major axis of the same is less than 2 times longer than the minor axis, and a direction of the major axis is an axial direction of the boom; the sum of sectional areas of the lightening holes is 35%-40% of the area of the regions where the holes can be formed, and a minimum distance between the contours of every two adjacent lightening holes is not smaller than one half of a center distance of the adjacent lightening holes. The optimized crane has the advantages that the weight of the boom can be reduced and the performance of the boom can be improved.

Description

A kind of hoisting crane of improvement

The present invention is the divisional application that applicant is " 201410291223.8 " in the number of patent application of proposition on 06 25th, 2014, name is called the Chinese invention patent application of " hoisting crane and jib thereof ", and its full content is incorporated among the application.

Technical field

The present invention relates to elevator machinery, particularly relate to a kind of hoisting crane of improvement.

Background technology

Long-armed frame is the important component part of many goliath products, is the key structure that can hoisting crane normally work.But in real work, jib is frequent owing to using, and individual part (position) wherein easily forms endurance failure, and then causes whole hoisting crane normally to work; Thus, bring huge loss to client, cause great waste, be unfavorable for the competitive power of enterprise product.As can be seen here, jib is as the main load bearing component of hoisting crane, and its intensity and deadweight are directly connected to safety and the performance of hoisting crane.In order to make meet design requirement the fatigue life of jib, usually use high strength material to strengthen jib intensity, this can strengthen jib and complete machine weight undoubtedly, and it is helpless to improving product performance, but greatly increases manufacturing cost.

Summary of the invention

In view of this, the invention provides a kind of hoisting crane of improvement, on the basis meeting Fatigue life design requirement, jib weight can be alleviated.

For solving above technical matters, the invention provides a kind of hoisting crane of improvement, comprise jib, jib side wall surface can offer multiple lightening hole in opening area, describedly can to meet the following conditions between opening area profile and jib side wall surface gabarit: described can the minor increment between opening area left profile and the left outside exterior feature of jib side wall surface be jib side wall surface longitudinally maximum sized 1/10 ~ 1/9; Described can the minor increment between the right profile of opening area and the right outside exterior feature of jib side wall surface be jib side wall surface longitudinal maximum sized 1/10 ~ 1/9; Described can the minor increment on opening area on profile and jib side wall surface between gabarit be 1/4 ~ 1/3 of jib side wall surface horizontal maximum size; Described can the minor increment under opening area bottom profiled and jib side wall surface between gabarit be 1/4 ~ 1/3 of jib side wall surface horizontal maximum size; Wherein, described lightening hole is elliptical aperture, and the minor axis of lightening hole is 1/4 ~ 1/3 of jib side wall surface horizontal maximum size, and the major axis of lightening hole is not more than 2 times of minor axis and the long axis direction of lightening hole is jib axis; Further, the sectional area sum of described lightening hole be described can opening area area 35% ~ 40%, the minor increment between adjacent lightening hole profile is not less than the half of the distance at adjacent lightening hole center.

Preferably, head end and/or the tail end of jib are provided with bearing pin, and described can the minor increment inside opening area profile and bearing pin be 10cm ~ 20cm; Further, the middle part of jib arranges an oil cylinder seat, described can the right profile of opening area close on the left of oil cylinder seat.

Compared with prior art, the present invention is based on balanced life design philosophy, lightening hole offered by jib, the life-span at jib all parts or position is reached unanimity as far as possible, realize the structure optimization to jib, when meeting Fatigue life design requirement, farthest alleviating jib weight, promote the performance of jib and reduce costs.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of crane arm support of the present invention;

Fig. 2 is the structural representation of the application example of jib one shown in Fig. 1.

Detailed description of the invention

Be described in detail below in conjunction with accompanying drawing and specific embodiment.Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.

Basic conception of the present invention is, can offer at least one lightening hole at jib side wall surface in opening area.Obviously, for ensureing to meet Fatigue life design requirement, the key elements such as the size of lightening hole, shape and position of opening carry out a definite limitation and optimization, are described below in conjunction with accompanying drawing and specific embodiment.

Refer to Fig. 1, this figure is the schematic diagram of crane arm support of the present invention.This crane arm support arranges lightening hole, and these lightening holes not can arbitrarily be offered, otherwise seriously will damage jib.In fact, the mode of offering of the lightening hole in the present embodiment is through repeatedly, the result of strict l-G simulation test and in-place test, size, the key element such as shape and position of opening of these lightening holes form an organic whole, on the basis meeting Fatigue life design requirement, reach the object alleviating jib weight thus, below describe in detail.

As shown in Figure 1, in this jib 100, following condition can be met by the relative position relation between opening area profile 2 and jib side wall surface gabarit 1:

Can the minor increment L1 between opening area left profile and the left outside exterior feature of jib side wall surface be 1/10 ~ 1/9 of the longitudinal upperlimit L of jib side wall surface;

Can the minor increment L2 between the right profile of opening area and the right outside exterior feature of jib side wall surface be 1/10 ~ 1/9 of the longitudinal upperlimit L of jib side wall surface;

Can the minor increment H1 on opening area on profile and jib side wall surface between gabarit be 1/4 ~ 1/3 of jib side wall surface horizontal maximum size H;

Can the minor increment H2 under opening area bottom profiled and jib side wall surface between gabarit be 1/4 ~ 1/3 of jib side wall surface horizontal maximum size H.

For the size of lightening hole 3, following condition should be met:

Lightening hole is 1/4 ~ 1/3 of jib side wall surface horizontal maximum size H at the upperlimit D2 of jib side wall surface transverse direction;

Lightening hole is 2 ~ 3 times of jib side wall surface horizontal maximum size H at the upperlimit D1 of jib side wall surface longitudinal direction.

Meanwhile, the sectional area sum of lightening hole 3 be not more than can opening area area 35% ~ 40%.

Due to above-mentioned can fatigue life of opening area on 5% times of jib maximum life value, and this can the stress of opening area relatively little, less on jib impact fatigue life after perforate, be conducive to the safety ensureing jib.

Especially, when offering multiple lightening hole, the interval of lightening hole also should limit, and the minor increment d2 between its adjacent lightening hole profile is not less than the half of the distance d1 at adjacent lightening hole center.

As shown in Figure 1, the shape of lightening hole 3 can be multiple: such as, and lightening hole 3 is circular hole, and diameter D is not more than 1/4 ~ 1/3 of jib side wall surface horizontal maximum size H; For another example, lightening hole 3 is elliptical aperture, and minor axis b is not more than 2 times that 1/4 ~ 1/3, major axis a of jib side wall surface horizontal maximum size H is not more than minor axis b, and long axis direction is jib axis; And for example, lightening hole 3 is slotted hole, and the maxim that lateral dimension D2 is not more than 1/4 ~ 1/3 of jib side wall surface horizontal maximum size, longitudinal size D1 is 2 times of lateral dimension D2.

It is noted that when jib arranges bearing pin and oil cylinder seat, also reply can add sternly by opening area: if jib is provided with bearing pin, meeting on aforementioned condition basis, can opening area profile should close to inside bearing pin; If when arranging oil cylinder seat in the middle part of jib, should make can the right profile of opening area close to oil cylinder seat.

Refer to Fig. 2, this figure is the structural representation of the application example of jib one shown in Fig. 1.This jib 100, by top board 11, base plate 12 and a biside plate 13, forms box type construction; Some brace panels 14, along jib lateral arrangement, for strengthening the structural strength of jib; One oil cylinder seat 15, is arranged in the middle part of jib, for hinged driving oil cylinder (scheming not shown); Bearing pin 16, is arranged on head end A and/or the tail end B of jib 100, for realizing the rotation of jib.

For this kind of box type construction, can meet by opening area region S:

Can on opening area profile and side plate line of centers ultimate range H3, the ultimate range H4 of opening area bottom profiled and side plate line of centers can be respectively 1/8 ~ 1/6 of side plate width H0.

Because arranging bearing pin 16, can the minor increment D3 inside opening area profile and bearing pin be 10cm ~ 20cm., because being provided with brace panel 14 and oil cylinder seat 15, should make further meanwhile: can opening area left profile close to leftmost side brace panel 14, can the right profile of opening area close on the left of oil cylinder seat 15.

The product life that the present invention is concerned about from user most, based on balanced life design philosophy, jib 100 is offered some lightening holes 3, instead of pursues the reinforcement in intensity simply; Thus, ensureing the structure optimization basis that the life-span is constant realizing jib 100, the performance of jib 100 is improved.Specifically: by offering lightening hole 3, each position life-span of jib 100 being reached unanimity, realizes the loss of weight of jib 100, reduce productive costs; Meanwhile, increase the flexibility of jib 100, realize the passive vibration damping of jib 100, improve the resistance to shock of jib 100; In addition, also can improve the alerting ability of jib 100, promote the work efficiency of jib 100.

Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims

1. the hoisting crane improved, comprise jib, it is characterized in that, jib side wall surface can offer multiple lightening hole in opening area, describedly can to meet the following conditions between opening area profile and jib side wall surface gabarit: described can the minor increment between opening area left profile and the left outside exterior feature of jib side wall surface be jib side wall surface longitudinally maximum sized 1/10 ~ 1/9; Described can the minor increment between the right profile of opening area and the right outside exterior feature of jib side wall surface be jib side wall surface longitudinal maximum sized 1/10 ~ 1/9; Described can the minor increment on opening area on profile and jib side wall surface between gabarit be 1/4 ~ 1/3 of jib side wall surface horizontal maximum size; Described can the minor increment under opening area bottom profiled and jib side wall surface between gabarit be 1/4 ~ 1/3 of jib side wall surface horizontal maximum size; Wherein, described lightening hole is elliptical aperture, and the minor axis of lightening hole is 1/4 ~ 1/3 of jib side wall surface horizontal maximum size, and the major axis of lightening hole is not more than 2 times of minor axis and the long axis direction of lightening hole is jib axis; Further, the sectional area sum of described lightening hole be described can opening area area 35% ~ 40%, the minor increment between adjacent lightening hole profile is not less than the half of the distance at adjacent lightening hole center.

2. the as claimed in claim 1 hoisting crane improved, it is characterized in that, head end and/or the tail end of jib are provided with bearing pin, and described can the minor increment inside opening area profile and bearing pin be 10cm ~ 20cm; Further, the middle part of jib arranges an oil cylinder seat, described can the right profile of opening area close on the left of oil cylinder seat.