1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
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3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
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/J2754_201405 SURFACE VEHICLE STANDARD J2754 MAY2014 Issued 2007-06 Revised 2014-0
5、5 Superseding J2754 JUN2007 Volumetric Rating of Excavator Mounted, Bucket Linkage Operated Grapples RATIONALE This revision is to correct an error in Equation 6. Additionally, dates were removed from references, and they were reordered. TABLE OF CONTENTS 1. SCOPE AND APPLICATION 2 2. REFERENCES 2 2
6、.1 Related Publications 2 2.1.1 ISO Publications 2 3. RESTRICTIONS AND LIMITATIONS . 2 4. DEFINITIONS, SYMBOLS AND TERMINOLOGY 2 5. CALCULATION . 5 5.1 Enclosed Volume 5 5.2 End Volume . 5 5.3 Side Volume 5 5.4 Total Volume . 6 6. EXPRESSION OF THE VOLUMETRIC RATING . 6 6.1 Volumetric Rating of a Gr
7、apple . 6 6.2 Designation of the Commercial Capacity 6 7. NOTES 9 7.1 Marginal Indicia . 9 FIGURE 1 GRAPPLE NOMENCLATURE 6 FIGURE 2 GRAPPLE AREA IN THE GRAB POSITION 7 FIGURE 3 GEOMETRIC REPRESENTATION OF END AREA . 7 FIGURE 4 VOLUME SOLIDS THAT COMPOSE THE TOTAL VOLUME 8 FIGURE 5 GRAPPLE SPECIFICAT
8、IONS 8 TABLE 1 ALLOWABLE CAPACITY INCREMENTS. 6 SAE J2754 Revised MAY2014 Page 2 of 9 1. SCOPE AND APPLICATION This standard specifies a procedure for approximating the volume of materials contained in the grapple of bucket linkage operated grapples mounted to excavators. The volume ratings are base
9、d on the inside dimensions of the grapple and representative volumes extending beyond the grapple. The method employs the technique of dividing the complex shape of the material in the grapple into simple geometric forms to allow volume calculations of different grapple configurations. The rating me
10、thod is intended to provide a consistent means of comparing grapple capacities. It is not intended to define actual capacities that might be observed in any specific application. 2. REFERENCES 2.1 Related Publications The following publications are provided for information purposes only and are not
11、a required part of this SAE Technical Standard. 2.1.1 ISO Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ISO 7451 Earth moving machinery - Volumetric ratings for hydraulic excavator buckets and backhoe
12、 loader buckets ISO 7546 Earth moving machinery - Loader and front-loading excavator buckets - Volumetric ratings ISO 9248 Earth-moving machinery - Units for dimensions, performance and capacities, and their measurement accuracies 3. RESTRICTIONS AND LIMITATIONS The effect on volumes of local discon
13、tinuities such as tine teeth, tooth adapters, wear components and gussets shall be ignored. 4. DEFINITIONS, SYMBOLS AND TERMINOLOGY 4.1 GRAPPLE COMPONENTS (See Figure 1.) 4.1.1 Hinge Pin The pivot pin that connects the upper and lower jaws. 4.1.2 Inner Sheet The inside face that composes the inside
14、of the jaw. SAE J2754 Revised MAY2014 Page 3 of 9 4.1.3 Lower Jaw The half of the grapple not attached to the machines bucket linkage . 4.1.4 Outer Sheet The sheet that composes the outside of the jaw. 4.1.5 Stiff Link Bracket The bracket attached to the machines arm used for attaching the stiff lin
15、k. 4.1.6 Stiff Link The link that positions the lower jaw. 4.1.7 Tine Tip The end of the tine. 4.1.8 Tine A finger that is that portion of the jaw that interlocks with the opposing jaw. 4.1.9 Upper Jaw The half of the grapple that is attached to the machines bucket linkage. 4.1.10 Wear Plate Plates
16、that are attached to the inner and outer sheets of a grapple expressly as a sacrificial component to accommodate wear and therefore protect the grapple structure. 4.2 OPEN POSITION The position of the grapple jaws when the host machines bucket cylinder is fully retracted, or retracted as much as the
17、 grapple allows. 4.3 CLOSED POSITION The position of the grapple jaws when the host machines bucket cylinder is fully extended, or extended as much as the grapple allows. 4.4 GRAB POSITION The position of the grapple tines in which the area AGis maximized. 4.5 RATED GRAPPLE VOLUME VRMaximum grapple
18、capacity in the grab position. SAE J2754 Revised MAY2014 Page 4 of 9 4.6 GRAB POSITION AREA AGThe side area defined by the grapple shape in the grab position. (See Figure 2) 4.7 END AREA AEThe area defined as the distance between the tine tips with the grapple jaws in the grab position and the avera
19、ge of the widths of the lower and upper jaws. 4.8 ENCLOSED VOLUME VCThe volume constrained by the upper and lower tines of the grapple. 4.9 END VOLUME VEThe volume of material with a 1:2 inclination that is situated on the end of the enclosed volume. 4.10 SIDE VOLUME VSThe volume of material with a
20、1:1 inclination that is situated on the side of the enclosed volume. 4.11 UPPER JAW WIDTH A The width of the upper jaw at the tip of the jaw. (See Figure 5) 4.12 LOWER JAW WIDTH B The width of the lower jaw at the tip of the jaw. (See Figure 5) 4.13 MAXIMUM OPENING C The maximum distance between the
21、 jaw tips when fully opened. (See Figure 5) 4.14 MINIMUM THICKNESS D The thickness of the grapple when closed, measured from the outermost of upper jaw inner sheet to the outermost of the lower jaw inner sheet. 4.15 MAXIMUM THICKNESS E The height of the grapple when open, measured from the outermost
22、 of upper jaw. 4.16 TIP RADIUS F The distance from tine tip to the hinge pin. 4.17 JAW DEPTH G The distance from an line defined by the tine tip and the back edge of the jaw inner sheet to the furthest portion of the jaw shape curve. (See Figure 5) SAE J2754 Revised MAY2014 Page 5 of 9 5. CALCULATIO
23、N 5.1 Enclosed Volume The enclosed volume is calculated as follows: With the grapples jaws opened to the grab position VC= AGWA (Eq.1) where: AG= area in the grab position (See Figure 2) and 2BAwA (Eq. 2) 5.2 End Volume The end volume is approximated by creating a pyramid with a slope of 1:2, whose
24、base area and shape are the same as the end area and shape. Use the following formula to calculate the end volume: When AoWL t then: Ao2AA3EWL8W12WV x (Eq. 3) Otherwise when AoWL d then: o-Ao2o3ELW8L12LV x (Eq. 4) where: oL = distance between tine tips when jaws are opened to maximize AG(See Figure
25、3) 5.3 Side Volume The side volume is calculated using a method similar to the end volume, except the grab area is the equivalent area as a square. Use the grab area in the following formula to calculate the side volume: 6WVsq3s (Eq.5) where: GsqAW (Eq.6)SAE J2754 Revised MAY2014 Page 6 of 9 5.4 Tot
26、al Volume The total volume is the summation of the enclosed volume, the end volume and twice the side volume. It is expressed in the following calculation. (See Figure 4.) SECR2VVVV (Eq.7) 6. EXPRESSION OF THE VOLUMETRIC RATING 6.1 Volumetric Rating of a Grapple The volumetric rating of the bucket s
27、hall be the total volume as calculated in 5.4. 6.2 Designation of the Commercial Capacity The commercial capacity shall not exceed 3% of the calculated value. (See Table 1) TABLE 1 - ALLOWABLE CAPACITY INCREMENTS Values in Cubic Meters Range of Rated Capacity Increments Up to 1.5 0.05 1.6 to 3.5 0.1
28、 3.6 to 8 0.25 8 and larger 0.5 Stiff link bracket Stiff link Lower jaw Tine Tine tip Outer sheet Wear plate Upper jawHinge pin Inner sheet FIGURE 1 - GRAPPLE NOMENCLATURE SAE J2754 Revised MAY2014 Page 7 of 9 AGLOFIGURE 2 - GRAPPLE AREA IN THE GRAB POSITION AEFIGURE 3 - GEOMETRIC REPRESENTATION OF
29、END AREA SAE J2754 Revised MAY2014 Page 8 of 9 VSVEVCVSFIGURE 4 - VOLUME SOLIDS THAT COMPOSE THE TOTAL VOLUME ECFABGDFIGURE 5 - GRAPPLE SPECIFICATIONS SAE J2754 Revised MAY2014 Page 9 of 9 7. NOTES 7.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in
30、 locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE MTC C5, EXCAVATORS COMMITTEE
