JIS-A-8915-1982-ENG.pdf
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1、UDC 621.86/.87:624.132:531.24.083 JIS JAPANESE I NDUSTRIAL STANDARD Ear th-moving Machinery-Method for Locating the Centre of Gravity Printed in Japan 7s I _ JIS A 89 I 5 -1982 Translated and Published by Japanese Standards Association Copyright Japanese Standards Association Provided by IHS under l
2、icense with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 09:09:44 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S A*86115 82 = 4933b08 OU635258 CI Translation without guarantee standard in Japanese is to be evidence i n the event
3、of any doubt arising, the original Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 09:09:44 MDTNo reproduction or networking permitted without license from IHS -,-,- UDC 621.86/.87:624.132:
4、531.24.083 JAPANESE INDUSTRIAL STANDARD J I S Earth-moving Machinery-Method for A 8915-1982 Locating the Centre of Gravity 1. Scope This Japanese Industrial Standard specifies the method for locating the centre of gravity of the earth-moving machinery ( ) , hereinafter ref erred to as the “machine“.
5、 Note (l) The earth-moving machineries mentioned here are tractors, tractor shovels, scrapers, excavators, motor graders, dump trucks, tire rollers, vibration rollers, road rollers, etc, 2, Definitions For the purpose of this standard, the following definitions apply: (1) vertical reference plane 1
6、A plane which serves as a reference plane indicating the position of centre of gravity, that is generally a vertical plane through an axis of driving wheels or rear wheels (for 3 or more axles, the rearmost wheels). However, for a tractor shovel, a vertical plane through an axis of idle wheels(2) or
7、 front wheels. Note ( 2 ) The position Of the idle wheels shall be that corresponding to the grounding length prescribed in the specification. (3) ( 4 ) vertical reference plane 2 plane indicating the position of centre of gravity, that is a vertical plane intersecting vertically with the vertical r
8、eference plane 1, through the centre line of the centre distance of tracklinks, track or compacting width. A plane which serves as a reference horizontal reference plane plane, .on which a machine is to be placed. shall be such that no grouser penetration of a crawler type machine will cause. A plan
9、e which serves as a reference However, the plane horizontal fore-and- aft Co-ordinate A distance between the centre of gravity and the vertical reference plane 1.- lateral Co-ordinate in the horizontal plane A distance between the centre of gravity and the vertical reference plane 2. be taken as plu
10、s, if the centre of gravity lies on the right hand of the vertical reference plane 2 and as minus if it lies on the left hand, viewed towards advancing direction. It shall vertical Co-ordinate the horizontal reference plane. A distance between the centre of gravity and o. Applicable Standards and Co
11、rresponding International Standard: See page 9. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 09:09:44 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S A*8L
12、5 82 M L1933608 00635260 9 2 A 8915-1982 3. Measuring Conditions The machine shall be subjected to measurements under the following conditions. Furthermore , measurements may be made under the conditions otherwise as agreed between the parties concerned. (1) The machine shall be free from adhesion o
13、f mud, sand, etc. and partial deformation and the like, and shall be in a condition operatable normally. Quantity of the fuel shall be not less than 95 % in tank capacity, and the cooling water, lubricating oil, working oil, etc. shall respectively be the specified quantities, and the mass of operat
14、or shall not be included. (2) (3) Tools, spare tires and others shall be provided in the normal stowage positions. (4) The tire inflation-pressures shall be as specified in the manufacturers operating instructions or, if a range of pressures is specified, generally be at the highest pressure. machin
15、es fitted with hydro-inflation tires, these shall be filled with the liquid in accordance with the manufacturers designation. In the case of (5) The machine shall be subjected to measurement under no load condition, generally in the travel1ing.position or in the operat- ing position. However, if it
16、is required to obtain the centres of gravity in other positions ( 3, or other loaded conditions , measure- ments may be made under respective conditions. Note (3) Details for these positions shall be specified in the standards for respective machines. 4 . Measuring Instruments The measuring instrume
17、nts to be used for the measurements of centre of gravity shall be as given in the following, except for the crane, decking, knife edges, plumb rule or those having functions equal to these. (1) Levels The levels specified in JIS B 7510 or J I S B 7511. (2) Squares Those as specified in J I S B 7526
18、or J I S B 7534. (3) Tape Measures The tape measures of Grade 1 as specified in J I S B 7512. (4) Weighbridge The weighbridge having sufficient capacity for weighing the measuring objects shall be used, and its accuracy shall be 0.5 % FS (full scale). (5) Recording Board The recording board, a firm
19、board with smooth surface of 600 m m or more high and 450 mm or more wide in dimen- sions, shall be attached, at right-angles with the vertical refer- ence plane 1 and horizontal reference plane, and in parallel with the vertical reference plane 2, on an appropriate place at the side of the machine.
20、 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 09:09:44 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S A*89L5 82 = 4933608 0005263 O _ _ _ _ 3 A 8915-1982
21、 5. - Measuring Procedures 5.1 Horizontal Fore-and-Aft Co-ordinate 5.1.1 Crawler Type Machines The measuring procedures of the horizontal fore-and-aft Co-ordinate of the crawler type machines shall be as follows (see Fig. 1): . Measure the massMof the machine. However, a large scale machine or a lon
22、g machine which is immeasurable at once may be measured by splitting . Measure the sum r of the mass of the knife edge B and the mass of the deck distributed to the knife edge B. Mount the machine on the deck being supported by knife edges A and B in the state of (2) so that the vertical reference p
23、lane 1 comes near the knife edge A, and measure the sum Rilof the mass of the machine and deck distributed on the knife edge B and the mass of knife edge B. Measure the distance P between the knife edges A and B and the horizontal distance a from the knife edge A to the vertical refer- ence plane 1.
24、 Calculate the mass of the machine Rldistributed to the knife edge B, and then calculate the horizontal fore-and-aft Co-ordinatesfrom the following equation: where s: horizontal fore-and-aft Co-ordinate (mm) Ri: mass of the machine distributed to the knife edge B (kg) Ri = Ri -r where A,: sum of the
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