SAE J 2417-2014 Lift Capacity Calculation Method Knuckle-Boom Log Loaders and Certain Forestry Equipment.pdf

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4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2417_201410 SURFACE VEHICLE STANDARD J2417 OCT2014 Issued 1998-06 Revised 2014-1

5、0 Superseding J2417 AUG2009 Lift Capacity Calculation Method Knuckle-Boom Log Loaders and Certain Forestry Equipment RATIONALE The references listed in sections 1.0 SCOPE, 2.1.1 SAE Publications, Rationale, Application, and Reference Sections are no longer accurate, and shall be revised to indicate

6、proper referencing below: x Reference SAE J1209 Identification Terminology of Mobile Forestry Machine has been superseded by ISO 6814 Machinery for forestry Mobile and self-propelled machinery - Terms, definitions and classification. x Reference SAE J2055 Identification Terminology and Component Nom

7、enclature Knuckle Boom Log Loader has been superseded by ISO 17591 Machinery for forestry Knuckle Boom Log Loaders Identification terminology, classification and component nomenclature. x Reference SAE J1255 Specification Definitions Feler/Buncher has been superseded by ISO 13862 Machinery for fores

8、try Feller-bunchers - Terms, definitions and commercial specifications. x Reference SAE J1097 Hydraluic Excavator Lift Capacity Calculation and Test Procedure has been superseded by ISO 10567 Earth-moving Machinery Hydraulic excavators Lift capacity. 1. SCOPE This SAE Standard provides a uniform met

9、hod to calculate the lift capacity of knuckle-boom log loaders and certain forestry equipment. It establishes definitions and specifies machine conditions for calculations. This document applies to knuckle-boom log loaders as defined in ISO 6814 and ISO 17591 and certain forestry equipment defined i

10、n ISO 6814 that have a rotating upper-structure such as feller bunchers, forwarders, harvesters, and behind the cab or rear-mounted knuckle-boom log loaders not having their own power supply. It does not apply to harvesters that are incapable of lifting a tree or log completely off the ground. This

11、document applies to those machines that are crawler, rubber-tired, and pedestal or stationary mounted. 1.1 Purpose The purpose of the SAE document is to establish a consistent, repeatable means of determining the lift capacity for the types of equipment contained therein. SAE INTERNATIONAL J2417 Rev

12、ised OCT2014 Page 2 of 16 1.2 Applicability Lift capacity calculations and the resulting rated lift capacity chart are developed by the equipment manufacturer or the entity that assembles and or modifies basic components to produce the complete machine for each machine model that is produced. These

13、charts are developed solely for comparative purposes. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1SAE Publications Available from

14、 SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. J1254 Component Nomenclature - Feller Buncher 2.1.2ISO Publication Available from American National Standards Institute, 25 West 43rd Street, N

15、ew York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ISO 6814 Machinery for forestry-mobile and self propelled machinery - Identification vocabulary ISO 17591 Machinery for forestry Knuckleboom log loaders Identification terminology, classification and component nomenclature 2.2 Related Publicat

16、ions The following publications are provided for information purposes only and are not a required part of this SAE Technical Report. 2.2.1ISO Publication Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ISO 10567 Ear

17、th-moving machinery - Hydraulic excavators - Lift capacity ISO 13862 Machinery for forestry Feller-bunchers Terms, definitions and commercial specifications 3. DEFINITIONS 3.1 ATTACHMENT That portion of the machine that is unique and dedicated to the machines primary purpose, i.e., log and material

18、handling and the processing of trees and logs. NOTE: The attachment, depending upon the type of machine, can be called working equipment, boom set, front linkage, or front. SAE INTERNATIONAL J2417 Revised OCT2014 Page 3 of 16 3.2 BALANCE POINT The theoretical location on the machine at which the for

19、ward moment produced by the attachment and load is equal to the rearward moment produced by the weight of the machine. 3.3 FORESTRY PROCESSING HEAD The component of a forestry attachment that processes the tree or log, e.g., felling, delimbing, slashing, bucking, and piling. 3.4 GROUND REFERENCE PLA

20、NE For crawler and rubber-tired mounted machines, the ground reference plane is that firm level supporting surface that the machine sits on, see Figures 1, 2, 3, 4, and 5. For pedestal or other stationery-mounted machines, the ground reference plane may be either the firm, level supporting surface t

21、he entire machine and structure sits on or an arbitrary but easily distinguished physical feature selected by the manufacturer. See Figure 6. For those machines supplied without a crawler, rubber-tired, or pedestal mounting, it is the responsibility of the manufacturer to select and define the groun

22、d reference plane. 3.5 HOLDING CIRCUIT PRESSURE The maximum static pressure in a specific circuit, limited by a relief valve at a flow no greater than 10% of rated circuit flow. 3.6 HYDRAULIC LIFT CAPACITY The load that can be supported from the lift point at a specific lift point position by applyi

23、ng working circuit pressure to any cylinder(s) without exceeding holding circuit pressure in any other circuit. 3.7 LIFT POINT The location on the attachment specified by the manufacturer, to which a load may be attached for lifting purposes. NOTE: If more than one lift point is provided, the one ha

24、ving the greatest lift point radius shall be used for determining lift capacities. See Figures 1 through 6. The lift points location shall be identified on the rated capacity chart. 3.8 LIFT POINT HEIGHT The vertical distance from the ground reference plane to the lift point. See Figures 1 through 6

25、. 3.9 LIFT POINT POSITION The location of the lift point as defined by the lift point height and radius. 3.10 LIFT POINT RADIUS The horizontal distance from the axis of rotation to the lift point. See Figures 1 through 6. 3.11 LOAD The external weight including the weight of the grapple, processing

26、head, and attaching equipment, (kilograms) applied at the lift point. 3.12 MAXIMUM RADIUS (RATED) LIFT CAPACITY The lift capacity, determined in the same manner as the (rated) lift capacity, except that the lift point position is at the maximum radius for a given lift point height. SAE INTERNATIONAL

27、 J2417 Revised OCT2014 Page 4 of 16 3.13 MINIMUM RADIUS (RATED) LIFT CAPACITY The lift capacity determined in the same manner as the (rated) lift capacity, except that the lift point position is at the minimum radius for a given lift point height. 3.14 RATED HYDRAULIC LIFT CAPACITY 87% of the lesser

28、 of the hydraulic lift capacities at a specific lift point position. 3.15 RATED LIFT CAPACITY The smaller of either the rated tipping lift capacity or rated hydraulic lift capacity. 3.16 RATED TIPPING LIFT CAPACITY 75% of the tipping load at the specific lift point position. 3.17 TIPPING LINE A theo

29、retical line about which the machine is assumed to tip. In most instances, the tipping line moves as increased tipping occurs. NOTE: For calculation purposes, the tipping line is assumed fixed relative to the machine. See Figures 1 through 6. 3.18 TIPPING LIFT CAPACITY The load that can be supported

30、 from the lift point at a specific lift point position with the machine at its balance point. 3.19 WORKING CIRCUIT PRESSURE The nominal pressure produced in the specific circuit by resistance to flow from the pump(s). 4. LIFT CAPACITY CALCULATIONS 4.1 Machine Configuration for Calculations 4.1.1 Ope

31、rating Mass The mass of the base machine with standard equipment, or equipment specified by the manufacturer, operator (75 kg), full fuel tank, full lubricating, hydraulic, and cooling systems. The weight of grapples and forestry processing heads shall not be included in the operating mass. 4.1.2 Pe

32、rmissible Variations Because of the large number of attachment options and machine variations available, the manufacturer shall publish revised lift capacity charts if these variations would decrease the machine rated lift capacity by more than 5%. 4.1.3 Machine configuration for calculations 4.1.3.

33、1 Lift capacities shall be calculated with the machine on a firm level supporting surface. 4.1.3.2 For machines equipped with oscillating axles, the axle(s) shall be positioned perpendicular to the longitudinal axis of the machine. 4.2 Hydraulic Load Calculations At various lift point positions, to

34、determine the load that can be supported at the lift point by the force generated by each hydraulic cylinder(s). Sufficient lift point positions shall be considered to develop the rated lift capacity chart throughout the machines operating range as defined in 5.3. SAE INTERNATIONAL J2417 Revised OCT

35、2014 Page 5 of 16 4.3 Tipping Load Calculations At various lift point positions, to determine the load required to achieve the balance point as defined in 3.2. Lift point positions shall encompass those that are over both the ends and sides of the machine. Sufficient lift point positions shall be co

36、nsidered to develop the rated lift capacity chart throughout the machines operating range as defined in 5.3. Over-end tipping may be either over the front and/or over the rear of the machine; but shall be defined and identified by the manufacturer. For the purposes of this document, the two over-sid

37、e tipping conditions are assumed to be equal. The over-side tipping calculations shall be done in the least stable condition. 4.4 Over-End Tipping The tipping line to be used for balance point calculations over the front and rear of crawler-mounted machines shall be the centerline of the support idl

38、ers or drive sprockets. See Figure 1. The rear of the crawler mount is the end that contains the drive sprocket. The front of the crawler mount contains the support idler. The tipping line to be used for calculations over the front and rear of rubber-tired mounted machines shall be the axle centerli

39、ne, bogie axle centerline, or the centerline of the outrigger pads as shown in Figures 2 through 5. For machines equipped with outriggers, the calculations shall be developed for the outriggers fully applied in the manufacturers recommended position and also with the outriggers fully retracted. See

40、4.6 and Figures 2, 4, and 5. 4.5 Over-Side Tipping The tipping line to be used for balance point calculations over the side of crawler-mounted machines shall be the theoretical tipping point between the support rollers and the track links as shown in Figure 7. The tipping line to be used for balance

41、 point calculations over the side of rubber-tired mounted machines shall be the distance to the centerline of the tires at the ground reference plane, the midpoint between dual tires at the ground reference plane, or the tipping line of outrigger pads as defined in 4.6. See Figures 2, 4, 5, and 8. F

42、or machines equipped with outriggers, calculations shall be developed for the outriggers fully applied in the manufacturers recommended position and also with the outriggers fully retracted. For calculations with the outriggers fully applied, the rubber-tired mounting shall be free of the ground wit

43、h the machine fully supported by the outriggers. See Figure 2. For calculations with the outriggers fully retracted, the tipping line shall be defined through the wheel tipping line. 4.6 Outrigger Pads When defined through oscillating, (ball and socket), or pivoting outrigger pads, the tipping line

44、shall be at the ground reference plane directly below the centerlines of the outrigger pad oscillation points or pivots. When defined through rigid outrigger pads, the tipping line shall be at the ground reference plane throughout the centroids of the pad ground contact areas. See Figures 2, 4, and

45、5. 4.7 Blades For machines equipped with dozer or back-fill blades, the blade may be used to increase the over-front and over-side tipping capability of the machine. The tipping line is the intersection of the blade and the ground reference plane. See Figure 3. When the blade is used to increase the

46、 machines tipping capability, the manufacturer shall ensure that the blades hydraulic system and its structural integrity are sufficient to withstand the loads imposed by the tipping condition. For machines equipped with blades, calculations shall be developed with and without the influence of the b

47、lade. 4.8 Pedestal-Mounted Machines For pedestal- or stationary-mounted machines where tipping conditions do not exist, the manufacturer shall ensure that the structural integrity of the machine is sufficient to withstand the calculated hydraulic lift capacities. Derating the lift capacity chart to

48、compensate for structural inadequacies is not permissible. 4.9 Machines Without Mountings For machines supplied without mountings, such as trailer-mounted and truck-mounted log loaders and for loaders that are to be pedestal mounted by a third party, the manufacturer shall base the lift capacities s

49、olely on the machines hydraulic capacity. The provisions of 4.8 shall apply. SAE INTERNATIONAL J2417 Revised OCT2014 Page 6 of 16 5. RATED LIFT CAPACITY CHART 5.1 The rated lift capacity chart shall show the rated lift capacity at specific lift point positions. The chart shall note if the values are limited by hydraulic lift capacity. 5.2 Two acceptable formats for the rated lift capacity chart