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 theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2012 SAE International All rights reserved. No part of this pub
3、lication 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: +1 724-776-4970
4、(outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J49_201207SURFACEVEHICLESTANDARDJ49 JUL2012 Issued 1973-01 Revised 2012-07Supersedin
5、g J49 APR1980 Specification Definitions - Hydraulic Backhoes RATIONALEThis standard is being revised to update the figures to include roll-over protective structures and to update out-of-date references.1. SCOPE 1.1 This standard applies to hydraulic backhoes which have no more than 190 degrees of r
6、otational swing, and are mounted on wheel tractors and crawler tractors. 1.2 Purpose The purpose of the standard is to establish a uniform method of providing dimensional and operational specifications for hydraulic backhoes. Dimensional and operational specifications are determined without assembly
7、 or equipment changes such as buckets, dippersticks, etc. When specifications are affected by adjustable or extendable members, the position must be specified. 4.2.1 6.2 are further defined by Figures 18. Figures 18 are not intended to be descriptive of any existing machine and are used only to clar
8、ify the meaning of the standard. 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. SAE J49 Revised JUL2012 Page 2 of 10 2.1.1 SAE Publicatio
9、ns Available from 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.SAE J31 Hydraulic Backhoe Lift Capacity SAE J326 Nomenclature - Hydraulic Backhoes SAE J695 Turning Ability and Off Tracking -
10、Motor Vehicles SAE J732 Specification Definitions - Loaders 2.1.2 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 hoe-type and grab-type bucke
11、ts of hydraulic excavators and backhoe loaders ISO 7457 Earth-moving machinery - Determination of turning dimensions of wheeled machines ISO 8812 Earth-moving machinery - Backhoe loaders - Definitions and commercial specifications 3. SPECIFICATIONS - GENERAL 3.1 MODEL DESIGNATION Manufacturers model
12、 number for the backhoe specified. 3.2 TYPE OF BACKHOE 3.2.1 Integral Backhoe A backhoe which is an integral part of the prime mover.3.2.2 Utility Backhoe A backhoe which is not an integral part of the prime mover. 3.3 PRIME MOVER MODEL For utility backhoes, state the manufacturers model number on w
13、hich the specifications are based. 3.4 LOADER State whether the unit is equipped with a loader, and if so, give manufacturers model number of the loader. Specify type and size of loader bucket. 3.5 TIRE OR TRACK State the track shoe type and width in millimeters (inches) or the tire type size, ply a
14、nd specified tire inflation pressure; where the front and rear tires are different, both must be specified. SAE J49 Revised JUL2012 Page 3 of 10 3.6 TREAD OR TRACK GAGE The transverse distance in millimeters (inches) between the centerlines of the tires or sprockets; where front and rear treads are
15、different, both must be specified. 3.7 WHEELBASE As specified in ISO 8812.3.8 BUCKET Specify type, weight (kg, lb), cutting width (mm, in) and volumetric rating (capacity) per ISO 7451. 3.9 COUNTERWEIGHT Specify type and amount (kg, lb) of counterweight and/or ballast, if any. 3.10 EXTENDABLE DIPPER
16、STICK If dipperstick is extendable, specify: a. Type - Telescoping, additional member, sliding collar or other. b. Method of Extension - Hydraulic or manual. c. Extension - Minimum and maximum extension and number of intermediate positions available. 4. SPECIFICATIONS - DIMENSIONAL 4.1 General All a
17、pplicable measurements shall be made at bucket teeth, unless otherwise specified. Directional references in the specifications shall be in accordance with SAE J326. When the unit is equipped with an extendable dipperstick, indicate the position of the dipperstick used for this specification. 4.2 Tra
18、nsport These dimensions shall be taken with all components in the transport position. Transport position is to be defined by the manufacturer.4.2.1 Transport Height (A) The vertical distance in mm (in) from the ground to the highest point on the backhoe machine, or prime mover. 4.2.2 Stabilizer Spre
19、ad Transport (B) The distance in mm (in) between the farthest points of the stabilizer assemblies. 4.2.3 Ground Clearance (C) The minimum distance in mm (in) from the ground to lowest point on the backhoe or machine per ISO 8812. 4.2.4 Angle of Departure As specified in ISO 8812. SAE J49 Revised JUL
20、2012 Page 4 of 10 4.2.5 Overall Length In Transport Position (D) The horizontal distance in mm (in) with loader buckets, if so equipped, at carry position as specified in ISO 8812. 4.2.6 Overall Width (E) The maximum outside width in mm (in) of the backhoe or machine. 4.2.7 Operating Mass The total
21、mass in kg (lb) of unit as specified, fully serviced, and including a full fuel tank and an 80 kg (175 lb) operator. 4.2.8 Mass Distribution (Wheeled Machined) Front and rear wheel reactions of the unit as specified in 4.2.7. 4.2.9 Machine Clearance Diameter As specified in ISO 7457. 4.3 Operational
22、 These dimensions shall be obtained with main bearing surfaces of the stabilizers on the ground. On rubber-tired units, all the tires shall be tangent to the ground; and on track units, the track is to be on the ground and all rollers to contact the track. 4.3.1 Digging Depth, Maximum (F) The vertic
23、al distance in mm (in) from the ground line to the tip of the bucket teeth. 4.3.2 Digging Depth, 610 mm (2 ft) Flat Bottom (G) The vertical distance in mm (in) from the ground line to a flat bottom trench 610 mm (24 in) in length generated by the bucket teeth. 4.3.3 Digging Depth, 2440 mm (8 ft) Fla
24、t Bottom (H) The vertical distance in mm (in) from the groundline to a flat bottom trench 2440 mm (96 in) in length generated by the bucket teeth. 4.3.4 Overall Operating Height, Fully Raised (J) The vertical distance in mm (in) from the ground line to the highest point attainable. 4.3.5 Loading Hei
25、ght (K) The maximum vertical distance in mm (in) from the ground to the lowest point of the bucket. Bucket is to be positioned so that a line passing through the hinge pin center and passing through the farthest forward point of the bucket cutting edge shall be 60 degree maximum with respect to the
26、horizontal. 4.3.6 Loading Reach (L) The horizontal distance in mm (in) from the intersection of swing pivot centerline and supporting surface to the bucket teeth with bucket positioned and located as in 4.3.5. SAE J49 Revised JUL2012 Page 5 of 10 4.3.7 Reach from the Swing Pivot (M) The maximum hori
27、zontal distance in mm (in) from the intersection of the swing pivot centerline and the supporting surface to the bucket teeth at the ground line. 4.3.8 Swing Pivot to Rear Wheels (N) The perpendicular distance in mm (in) from the centerline of the swing pivot to the centerline of the rear wheels. 4.
28、3.9 Bucket Rotation (P) The degrees of uninterrupted rotation about the bucket hinge pin. 4.3.10 Swing Arc (Q) The degrees of uninterrupted rotation about the swing pivot centerline. 4.3.11 Stabilizer Spread, Operating Position (R) The distance in mm (in) between centers of stabilizer pads when posi
29、tioned as stated. 4.3.12 Side Shift (S), (Side Shift Backhoes) Specify in mm (in) the maximum operating distance which the swing pivot centerline can be offset from centerline of machine.4.3.13 Wall Clearance (T), (Side Shift Backhoes) The minimum distance in mm (in) from the centerline of swing piv
30、ot in the full side shift position to the extreme outer point of the backhoe or machine with the machine in the operating position (stabilizer may be repositioned). 4.3.14 Leveling Angle (U) The maximum side slope in degrees that the backhoe can dig a vertical trench by adjusting the stabilizers.5.
31、SPECIFICATION - HYDRAULIC The hydraulic specifications shall be determined with the oil temperature at 82 C (180 F). The viscosity of the oil used to rate the components shall be stated. If volumes are specified in gallons, state whether U. S. or Imperial. 5.1 System Relief Valve Setting Measured as
32、 minimum Pascals (psi) at specified flow in L/min (gal/min). 5.2 Pump Capacity Minimum delivery in L/min (gal/min) specified hydraulic fluid at rated engine rpm and relief valve pressure setting in Pascals (psi). 5.3 Hydraulic System Capacity Measured in liters (gallons) of hydraulic oil required to
33、 fill reservoir and hydraulic system to working capacity. SAE J49 Revised JUL2012 Page 6 of 10 6. SPECIFICATIONS - OPERATIONAL The unit shall be equipped as previously specified when determining the following specifications: 6.1 Digging Force, Using Bucket Cylinder (V) Maximum calculated force in Ne
34、wtons (pounds) applied at the tip of bucket teeth tangent to the arc of bucket rotation about the bucket hinge pin. 6.2 Digging Force, Using Dipperstick Cylinder (W) Maximum calculated force in Newtons (lb) applied at the tip of the bucket teeth tangent to the arc of the bucket rotation about the di
35、pperstick hinge pin. Use the bucket position as determined by 6.1. 6.3 Lift Capacity, Using Boom Cylinder(s) Specify per SAE J31. 6.4 Lift Capacity, Using Dipperstick Cylinder(s) Specify per SAE J31. FIGURE 1 - TRANSPORT POSITION OF INTEGRAL BACKHOE WITH EXTENDABLE DIPPERSTICK SAE J49 Revised JUL201
36、2 Page 7 of 10 FIGURE 2 - TRANSPORT POSITION OF CRAWLER BACKHOE WITH EXTENDABLE DIPPERSTICK FIGURE 3 - OPERATIONAL POSITION OF UTILITY BACKHOE SIDE SHIFT SAE J49 Revised JUL2012 Page 8 of 10 FIGURE 4 - OPERATIONAL POSITION OF UTILITY BACKHOE FIGURE 5 - SWING ARC SAE J49 Revised JUL2012 Page 9 of 10
37、FIGURE 6 - STABILIZER POSITIONS FIGURE 7 - DIGGING FORCE OF BUCKET CYLINDER SAE J49 Revised JUL2012 Page 10 of 10 FIGURE 8 - DIGGING FORCE OF DIPPERSTICK CYLINDER 7. NOTES 7.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where tech
38、nical 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 MTC1, LOADERS, CRAWLERS, SCRAPERSAND MOUNTED ATTACHMENTS COMMITTEE
