CN107386345A - Fit structure and excavator at high temperature resistant construction excavator boom front end - Google Patents

Fit structure and excavator at high temperature resistant construction excavator boom front end Download PDF

Info

Publication number
CN107386345A
CN107386345A CN201710721810.XA CN201710721810A CN107386345A CN 107386345 A CN107386345 A CN 107386345A CN 201710721810 A CN201710721810 A CN 201710721810A CN 107386345 A CN107386345 A CN 107386345A
Authority
CN
China
Prior art keywords
excavator
axle sleeve
fit
temperature resistant
bearing pin
Prior art date
Application number
CN201710721810.XA
Other languages
Chinese (zh)
Inventor
郭刚
陈维雄
昌盛
廖跃禄
张盼
高月光
王蓉
冯素格
Original Assignee
青岛雷沃工程机械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 青岛雷沃工程机械有限公司 filed Critical 青岛雷沃工程机械有限公司
Priority to CN201710721810.XA priority Critical patent/CN107386345A/en
Publication of CN107386345A publication Critical patent/CN107386345A/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36Component parts
    • E02F3/38Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms

Abstract

The present invention proposes fit structure and excavator at a kind of high temperature resistant construction excavator boom front end, fit structure includes dipper at excavator high temperature resistant construction excavator boom front end, the front end of dipper offers pilot hole, axle sleeve is equipped with pilot hole, the internal diameter of pilot hole and the external diameter of axle sleeve are interference fitted using H7/u7, bearing pin, the internal diameter of axle sleeve and the external diameter of bearing pin is hinged with axle sleeve using H8/f8 gaps to coordinate.Beneficial effects of the present invention:Fit structure at excavator high temperature resistant construction excavator boom front end is applied to excavator to adapt to construction at high temperature, when excavator works under about 120 DEG C of hot environments, the working time that the axle sleeve and bearing pin of dipper front end wear was postponed till 2000 hours by present 700 hours, the service life of part is extended, reduces maintenance cost.

Description

Fit structure and excavator at high temperature resistant construction excavator boom front end

Technical field

The present invention relates to excavator technical field, more particularly to cooperation at a kind of high temperature resistant construction excavator boom front end Structure and excavator.

Background technology

At present, the environment temperature in steel mill workshop is at 50-70 DEG C, and dust is big, high humidity, main in steel mill workshop to use digging Pick machine excavates the mineral powder in stewing hole, about 300 DEG C of the temperature of mineral powder, or excavates with the steel in tower destroyer processing crucible Slag, in this way, making the radiation temperature of excavator boom front end reach about 120 DEG C.As shown in figure 1, existing matching somebody with somebody of irising out of dipper front end Close in structure 1, sealing ring and axle sleeve on dipper, linkage component use plain edition, sealing ring be easily deformed at high temperature with always Change, lose sealing function, lubricating grease thinning outflow at high temperature, lubrication disappears.Dust can enter bearing pin and axle sleeve quickly Between gap, increase and rubbed between bearing pin and axle sleeve, cause premature wear and sintering failure.

The content of the invention

It is an object of the invention to provide fit structure and excavator at a kind of high temperature resistant construction excavator boom front end, solution Fit structure does not adapt to the technical problem of construction at high temperature at certainly current excavator boom front end.

The present invention provides fit structure at a kind of high temperature resistant construction excavator boom front end, including dipper, the front end of dipper Pilot hole is offered, axle sleeve, the internal diameter of pilot hole and the external diameter of axle sleeve are equipped with pilot hole and is interference fitted using H7/u7, axle Bearing pin, the internal diameter of axle sleeve and the external diameter of bearing pin is hinged with set using H8/f8 gaps to coordinate.

Further, the inner surface of axle sleeve is inlaid with solid graphite lubricant.

Further, axle sleeve is made up of high intensity high-tensile strength brass.

Further, bearing pin is formed from steel.

The present invention also provides a kind of excavator, and the excavator is constructed using above-mentioned high temperature resistant at excavator boom front end Fit structure.

Compared with prior art, fit structure and excavator have at high temperature resistant of the invention construction excavator boom front end Following characteristics and advantage:

Fit structure at the high temperature resistant construction excavator boom front end of the present invention, is applied to excavator to adapt to high temperature Construction, when excavator works under about 120 DEG C of hot environments, working time that the axle sleeve and bearing pin of dipper front end wear by Present postpones till 2000 hours for 700 hours, extends the service life of part, reduces maintenance cost.

After the embodiment of the present invention is read in conjunction with the figure, the features and advantages of the invention will become clearer.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis These accompanying drawings obtain other accompanying drawings.

Fig. 1 is assembling structure at current excavator boom front end;

Fig. 2 is the sectional view of pilot hole and axle sleeve fit structure in the embodiment of the present invention;

Fig. 3 is the sectional view of bottom bracket axle of the embodiment of the present invention and bearing pin fit structure;

Fig. 4 is the sectional view of bottom bracket axle of the embodiment of the present invention;

Wherein, 1, existing fit structure, 2, the front end of dipper, 3, axle sleeve, 4, bearing pin, 5, solid graphite lubricant.

Embodiment

As shown in Figures 2 to 4, the present embodiment provides fit structure at a kind of high temperature resistant construction excavator boom front end, bag Dipper is included, the front end 2 of dipper offers pilot hole, and axle sleeve 3, the internal diameter of pilot hole and the external diameter of axle sleeve 3 are equipped with pilot hole It is interference fitted using H7/u7, increases the frictional force of pilot hole and axle sleeve 3, even if the short time loses between axle sleeve 3 and bearing pin 4 The failure altered outside pilot hole will not also occur for lubrication, axle sleeve 3.Bearing pin 4, the internal diameter and bearing pin 4 of axle sleeve 3 are hinged with axle sleeve 3 External diameter using H8/f8 gaps coordinate, high temperature Lower shaft sleeve 3, which prolongs, radially-inwardly to be expanded, and bearing pin 4 prolongs radial outward expansion, due to adopting With suitable clearance fit relationship, enough gaps after high-temperature expansion therebetween also be present, will not be in contact and kill Failure, the two smoothly relative motion can be made, improve the reliability at the position and the service life of parts.

At present, the axle sleeve on dipper uses 45# steel, under hot environment lubricating grease volatilization or due to poor sealing reason and When causing lubrication failure, axle sleeve and bearing pin directly contact, in the presence of impulsive force and inertia friction power, bearing pin and axle sleeve it is hard To change layer (quenching layer) to wear quickly, the steel bushing and steel shaft of two equivalent materials, iron molecule therebetween can accelerate mutually to move, Easily it is engaged, even melting is integrated under serious conditions.In the present embodiment, axle sleeve 3 is made up of high intensity high-tensile strength brass, high-strength The hardness of degree high-tensile strength brass is not less than 255HB, and the inner surface of axle sleeve 3 is inlaid with solid graphite lubricant 5, can be in hot environment It is lower to realize axle sleeve 3 and the good lubrication of bearing pin 4.Bearing pin 4 is formed from steel, on the basis of cost is reduced, even if in special circumstances Lower generation lubrication failure, can also avoid the occlusion of axle sleeve 3 and bearing pin 4.

The present embodiment also provides a kind of excavator, is tied using coordinating at above-mentioned high temperature resistant construction excavator boom front end Structure.

Fit structure at the high temperature resistant construction excavator boom front end of the present embodiment, is applied to excavator, Ke Yishi Construction at high temperature is answered, when excavator works under about 120 DEG C of hot environments, is persistently added without the axle sleeve to dipper front end and bearing pin Lubricating grease, the working time that the axle sleeve and bearing pin of dipper front end wear were postponed till 2000 hours by present 700 hours, prolonged The service life of part has been grown, has reduced maintenance cost.

Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck The variations, modifications, additions or substitutions that the technical staff in domain is made in the essential scope of the present invention, it should also belong to the present invention's Protection domain.

Claims (5)

  1. A kind of 1. fit structure at high temperature resistant construction excavator boom front end, it is characterised in that:Including dipper, the front end of dipper is opened Provided with pilot hole, axle sleeve, the internal diameter of pilot hole and the external diameter of axle sleeve are equipped with pilot hole and is interference fitted using H7/u7, axle sleeve In be hinged with bearing pin, the internal diameter of axle sleeve and the external diameter of bearing pin using H8/f8 gaps coordinate.
  2. 2. fit structure at high temperature resistant construction excavator boom front end according to claim 1, it is characterised in that:Axle sleeve Inner surface is inlaid with solid graphite lubricant.
  3. 3. fit structure at high temperature resistant construction excavator boom front end according to claim 2, it is characterised in that:Axle sleeve by High intensity high-tensile strength brass is made.
  4. 4. fit structure at high temperature resistant construction excavator boom front end according to claim 3, it is characterised in that:Bearing pin by Steel is made.
  5. A kind of 5. excavator, it is characterised in that:The excavator is using the high temperature resistant construction described in any one of Claims 1-4 Fit structure at excavator boom front end.
CN201710721810.XA 2017-08-22 2017-08-22 Fit structure and excavator at high temperature resistant construction excavator boom front end CN107386345A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710721810.XA CN107386345A (en) 2017-08-22 2017-08-22 Fit structure and excavator at high temperature resistant construction excavator boom front end

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710721810.XA CN107386345A (en) 2017-08-22 2017-08-22 Fit structure and excavator at high temperature resistant construction excavator boom front end

Publications (1)

Publication Number Publication Date
CN107386345A true CN107386345A (en) 2017-11-24

Family

ID=60352776

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710721810.XA CN107386345A (en) 2017-08-22 2017-08-22 Fit structure and excavator at high temperature resistant construction excavator boom front end

Country Status (1)

Country Link
CN (1) CN107386345A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201953818U (en) * 2010-12-20 2011-08-31 无锡润鹏复合新材料有限公司 Self-lubricating sliding bearing
CN103362154A (en) * 2013-07-09 2013-10-23 广西柳工机械股份有限公司 Loader for shovel-loading of hot slag
EP2662597A1 (en) * 2012-05-08 2013-11-13 VCST Industrial Products BVBA An idler gear assembly, as well as an internal combustion engine comprising the idler gear assembly, and a method for fixing a bushing in a through bore of a gear of the idler gear assembly
WO2014065320A1 (en) * 2012-10-25 2014-05-01 Ntn株式会社 Support point bearing device for pulley arm

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201953818U (en) * 2010-12-20 2011-08-31 无锡润鹏复合新材料有限公司 Self-lubricating sliding bearing
EP2662597A1 (en) * 2012-05-08 2013-11-13 VCST Industrial Products BVBA An idler gear assembly, as well as an internal combustion engine comprising the idler gear assembly, and a method for fixing a bushing in a through bore of a gear of the idler gear assembly
WO2014065320A1 (en) * 2012-10-25 2014-05-01 Ntn株式会社 Support point bearing device for pulley arm
CN103362154A (en) * 2013-07-09 2013-10-23 广西柳工机械股份有限公司 Loader for shovel-loading of hot slag

Similar Documents

Publication Publication Date Title
CN101427038B (en) Electrical machine with magnetic bearing and safety bearing
CA2598545C (en) Self-lubricating guiding element
JP2832800B2 (en) Plain bearing assembly
JP2005524030A (en) Sealed spherical roller bearing for dragline swing shaft
US7309186B2 (en) Pin cartridge for a pin joint
WO1992001881A1 (en) Low friction seal assembly
AU2013357102B2 (en) Guiding member in the form of a metal ring for assembly with friction and with the articulating and/or sliding capability of a shaft
JP5575472B2 (en) Copper alloy-based sliding material and copper alloy-based sliding member
WO2007132735A1 (en) Bearing unit
CN106763159B (en) A kind of zinc-containing alloy bearing based on kollag
US20070242910A1 (en) Grease For Slide Bearing
CN203948627U (en) Float grease seal ring, float grease seal and engineering machinery
EP2881631A1 (en) Sealing device
CA2634578A1 (en) Bidirectional hydrodynamic thrust bearing
WO2005019664A1 (en) Sliding bearing assembly and sliding bearing
BRPI0504694B1 (en) Rotating union to direct a heat exchange fluid
EP2916048B1 (en) Seal assembly
CN102780303B (en) Motor shaft sealing structure with high protection grade
CN104455000B (en) A kind of graphite dry powder lubrication bearing and its processing technology
CN201953818U (en) Self-lubricating sliding bearing
US20150135866A1 (en) Sealed guard for motor grader draft apparatus
CN201884479U (en) Sealed double-row angular contact ball bearing
JP4451276B2 (en) Grease for slide bearing
CN201116568Y (en) Self-lubricating centripetal oscillating bearing
US20140197675A1 (en) Self-lubricating and Cooling Metal Face Seal

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination