SAE J 348-1990 Wheel Chocks《轮制动垫块》.pdf

1、SAE-J348ADOPTION NOTICESAE-J348, “WHEEL CHOCKS“, was adopted on 03-OCT-94 for use by theDepartment of Defense (DoD). Proposed changes by DoDactivities must be submitted to the DoD Adopting Activity:Commander, US Army Tank-Automotive and Armaments Command, ATTN: AMSTA-TR-E/IE, Warren, MI 48397-5000.

2、Copies of this documentmay be purchased from the Society of Automotive Engineers 400Commonwealth Drive Warrendale, Pennsylvania, United States,15096-0001. http:/www.sae.org/_Custodians: Adopting Activity:Army - ATArmy - ATNavy - YDAir Force - 99FSC 2530DISTRIBUTION STATEMENT A: Approved for public r

3、elease; distributionis unlimited.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and

4、 engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it

5、may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.QUESTIONS REGARDING THIS DOCUMENT: (412) 772-8512 FAX: (412) 776-0243TO PLACE A DOCUMENT ORDER; (412) 776-4970 FAX: (412) 776-0790http:www.sae.orgCopyright 1990 Society of Automotive Engineers, Inc.All rights

6、 reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001STANDARDSubmitted for recognition as an American National StandardJ348REV.JUN90Issued 1968-07Revised 1990-06Superseding J348 JUL68(R) WHEEL CHOCKSForewordThis Document has not changed other than to put it into

7、 the new SAE Technical Standards BoardFormat.1. ScopeThis SAE standard presents the basic information required for the design and manufacture of a wheelchock.2. ReferencesThere are no referenced publications specified herein.3. Definitions3.1 Wheel ChockAn external device, of, but not necessarily li

8、mited to, generally triangular configuration, which,when positioned in contact with a rubber-tired wheel at rest, will maintain the wheel at rest within the limits ofthe design calculations.4. Design Calculations4.1 Equilibrium MethodAssumptionsa. 30% grade condition (based on Federal Vehicle Standa

9、rd for passenger car parking brake)b. One wheel chockedc. Concave surface (maximum contact area) for wheel chockd. Static load - evenly distributede. Maximum vertical weight acting on one wheel of 11 500 lb (5216 kg) (based on Federal Regulation of23 000 lb (10 433 kg)f. Maximum horizontal force par

10、allel to incline of 23 000 lb (10 433 kg) (based on 80 000 lb (36 287 kg)maximum gvw at 30% grade)4.2 Energy Consideration MethodAssumptionsa. 30% grade condition (based on Federal Vehicle Standard for passenger car parking brake)b. One wheel chockedc. Plane surface for wheel chockd. Maximum forces

11、vary with tire sizee. Dynamic forces are considered (tire roll-back)Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J348 Revised JUN90-2-5. Test ConditionsA wheel chock must be so constructed as to

12、 withstand a uniformly distributed test load thatvaries with tire size as indicated in Figure 1. The angle of load application (41.7 degrees) is also shown inFigure 1.FIGURE 1Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted witho

13、ut license from IHS-,-SAE J348 Revised JUN90-3-6. Wheel Chock Design CriteriaDimensionsa. Height varies with tire size as shown in Figure 2.b. Length is 1.73 times height.c. Width is at least 3/4 of tire tread width.d. Chock angle, 0, (overall angle between the chock base and the tire engaging face)

14、 shall be between 35and 45 degrees.FIGURE 2Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J348 Revised JUN90-4-7. Notes7.1 Marginal IndiciaThe change bar (l) located in the left margin is for the

15、convenience of the user in locatingareas where technical revisions have been made to the previous issue of the report. An (R) symbol to the leftof the document title indicates a complete revision of the report.PREPARED BY THE SAE TRUCK & BUS CHASSIS COMMITTEECopyright SAE International Provided by I

16、HS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J348 Revised JUN90RationaleNot applicable.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThis SAE Standard presents the basic information required for the design and manufacture of awheel chock.Reference SectionThere are no referenced publications specified herein.Developed by the SAE Truck & Bus Chassis CommitteeCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-