ANSI ISO 4252-2012 Agricultural tractors - Operator's workplace access and exit - Dimensions.pdf

1、 ASABE/ISO 4252:2007 MAY2012 (R2017) Agricultural tractors Operators workplace, access and exit Dimensions American Society of Agricultural and Biological Engineers ASABE is a professional and technical organization, of members worldwide, who are dedicated to advancement of engineering applicable to

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10、 4252:2007 MAY2012 (R2017) Copyright American Society of Agricultural and Biological Engineers 1ASABE/ISO 4252:2007 MAY2012 (R2017) Approved June 2012; reaffirmed January 2017 as an American National Standard Agricultural tractors Operators workplace, access and exit Dimensions These materials are s

11、ubject to copyright claims of ISO and ASABE. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of ASABE. All requests pertaining to the ASABE/ISO 4252:2007 MAY2012 (R2017) standard should be submitted to ASABE. T

12、his standard was reviewed for adoption by the ASABE Power and Machinery Agricultural Machinery Agricultural Tractor Technical subcommittee, and has been formerly approved by the Power and Machinery Division. Adopted and approved as an American National Standard June 2012; reaffirmed January 2017. Ke

13、ywords: Access, Clearance, Doorway, Exit, Operator workplace, Tractors 0 Foreword 0.1 ASABE/ISO 4252:2007, Agricultural tractors Operators workplace, access and exit Dimensions, is an adoption without modifications of the identically titled ISO standard ISO 4252:2007, Agricultural tractors Operators

14、 workplace, access and exit Dimensions 0.2 ASABE/ISO 4252:2007 specifies the design dimensions of agricultural tractors having a minimum track width exceeding 1 150 mm in respect of a) the minimum dimensions of their access doorways, b) the number, location and minimum dimensions of their emergency

15、exits, and c) their minimum internal clearance dimensions. 0.3 Two normative references are listed in ISO 4252:2007. These references have been reviewed and accepted as part of the adoption of ASABE/ISO 4252:2007. 0.4 This standard has been approved as an American National standard by ANSI (American

16、 National Standards Institute). Text of ISO 4252:2007, Agricultural tractors Operators workplace, access and exit Dimensions, follows. 1 Scope This International Standard specifies the design dimensions of agricultural tractors having a minimum track width exceeding 1 150 mm in respect of a) the min

17、imum dimensions of their access doorways, b) the number, location and minimum dimensions of their emergency exits, and c) their minimum internal clearance dimensions. ASABE/ISO 4252:2007 MAY2012 (R2017) Copyright American Society of Agricultural and Biological Engineers 22 Normative references The f

18、ollowing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 789-6, Agricultural tractors Test procedures Part

19、6: Centre of gravity ISO 5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry Seat index point 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 emergency exit means of exit that can be opened from the inside of

20、 the cabin NOTE: It can be a normal access door. 3.2 access door doorway means of entry to, and exit from, the workplace or cabin 3.3 mountain tractor four-wheel drive agricultural or forestry tractor whose interchangeable equipment is intended for agricultural or forestry use and which is character

21、ized by a supporting frame, one or more power take-offs, a technically permissible mass not greater than 10 t at a ratio to the maximum unladen mass in running order of less than 2,5, and which has a centre of gravity less than 850 mm, determined in accordance with ISO 789-6 and measured in relation

22、 to the ground using the tyres that are normally fitted 4 Access doorway(s) The minimum dimensions of the access doorway aperture, both for the frame and with the door open, shall be as shown in Figures 1 and 2. For tractors where the seat can be reached straight from the footstep, the heights at wh

23、ich the widths are measured may be decreased. Dimensions in millimetres Figure 1 Access doorway dimensions ASABE/ISO 4252:2007 MAY2012 (R2017) Copyright American Society of Agricultural and Biological Engineers 3Key 1 wheel or other tractor part M Minimum dimension according to Figure 1. Figure 2 Ex

24、ample of limitation of dimensions with door open 5 Emergency exits 5.1 Number and location There shall be a minimum of two emergency exits, each of which shall be on a different side of the cabin: the front, rear and roof of the cabin may be considered as sides for this purpose. NOTE: In order to me

25、et market needs and/or national regulations, two emergency exits can be necessary in addition to an access door. Any window of sufficient size may be designated as an emergency exit if it is made of breakable glass that can be broken with a tool provided in the cab for that purpose. Laminated glass,

26、 plastic or double glass are not considered breakable for the purposes of this International Standard. 5.2 Dimensions The cross-sectional dimensions of each emergency exit shall be large enough to enclose an ellipse with principal axes of 640 mm and 440 mm. 6 Internal clearance dimensions The minimu

27、m clearance dimensions inside the cab shall be as shown in Figure 3 and in accordance with Table 1. The clearance dimensions for the hand controls (see Figure 3) shall be in accordance with Table 2. These dimensions are defined in relation to the vertical reference plane, which is generally longitud

28、inal to the tractor and passes through the seat index point (SIP) and the steering-wheel centre. The SIP shall be determined in accordance with ISO 5353. These dimensions are valid for tractors with only one operator position. For verification purposes, the seat shall be set in the rearmost longitud

29、inal position and at the mid-point of the height adjustment range. Seats having a suspension system whether or not adjustable according to the drivers weight shall be set to the mid-point of the suspension travel. ASABE/ISO 4252:2007 MAY2012 (R2017) Copyright American Society of Agricultural and Bio

30、logical Engineers 4Dimensions in millimetres Key 1 left cab wall 3 hand controls 2 right cab wall 4 SIP h equal to half the horizontal seat adjustment aValid for tractors with only one operator position. Not applicable for mountain tractors when the drivers seat SIP is more than 100 mm from the medi

31、an longitudinal plane of the tractor. For other mountain tractors, the 450 mm dimension may be reduced to 350 mm at a height of 310 mm above SIP and to 300 mm at a height of 810 mm above SIP. bSee Table 2. cThe clearance zone, as defined in this region by the 1 150 mm radius, may be reduced for cabi

32、ns where the limiting overall tractor maximum dimensions are of prime importance and/or for the accommodation of specific roof-mounted equipment. Figure 3 Minimum internal clearance dimensions ASABE/ISO 4252:2007 MAY2012 (R2017) Copyright American Society of Agricultural and Biological Engineers 5Ta

33、ble 1 Minimum internal clearance dimensions Distance Dimension min./mm Distance from a point 90 mm below and (140 + h ) mm behind the SIP to any part of the cab ceiling surface, above, forward and to either side of the operators heada1 050 Distance from SIP to the cab back wall at a height between 2

34、10 mm above the SIP and the roof contour defined by the 1 050 mm radius and the 150 mm blend radius 290 + h Lateral clearance at any distance between 310 mm above the SIP and the roof contour as defined by the 1 050 mm radius, perpendicular to the vertical reference plane for a distance of (310 h )

35、mm forward and (140 h ) mm rearward from the SIP 450 Distance from the outer side of the steering-wheel rim to the cab surface or other hand controlsb80 h is equal to half the horizontal seat adjustment. aSoft materials such as padding may penetrate into the free space up to a maximum of 50 mm. bExc

36、luding hand controls mounted on the steering-column. Table 2 Clearance dimensions for hand controls Control/Type of Control Dimensionamin./mm Controls that require an operating force of 150 N and engine controls 50 Controls that require an operating force of 80 N to 150 N (other than engine controls) 25 For controls that require an operating force of less than 80 N, maintain adequate clearance for operation. aThese minimum distances shall be valid for all control positions. Bibliography 1 ISO 4253, Agricultural tractors Operators seating accommodation Dimensions