This standard specifies the location and measurement method of the marking points of the driver's seat of agricultural tractors. This standard applies to the single-person driver's seat of wheeled and crawler tractors. JB/T 6715-1993 Agricultural tractor driver's seat marking points JB/T6715-1993 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T 6715-1993
Marking points of driving seat of agricultural tractor
Published on July 29, 1993
Ministry of Machinery Industry of the People's Republic of China
Implementation on January 1, 1994
Mechanical Industry Standard of the People's Republic of China
Marking points of driving seat of agricultural tractor
1 Subject content and scope of application
This standard specifies the location and measurement method of marking points of driving seat of agricultural tractor. This standard applies to single-person driving seat of wheeled and crawler tractors. 2 Definition
JB/T 67151993
The driver's seat index point (SIP, see Figure 1) is located in the longitudinal center plane of the driver's seat, 140 mm in front of the backrest rear surface of the measuring device (see Figure 2), and 90 mm above a horizontal plane that intersects the lower surface of the seat board 150 mm in front of the backrest rear surface.
The position of the driver's seat index point relative to the tractor is fixed and does not change due to different adjustment states of the driver's seat. 3 Measurement of the driver's seat index point
3.1 Measuring device
The driver's seat index point is measured using the device shown in Figure 2. The weight of the device is 6 ± 1 kg. 3.2 Adjustment of the driver's seat
Before measuring the driver's seat index point, the driver's seat should be adjusted as follows 3.2.1 For a driver's seat that can be adjusted forward and backward, up and down, and at an angle, each adjustment should be in the middle position. If it is not possible to adjust to the middle position due to structural limitations, it should be adjusted to the upper and rearward position closest to the middle position. 3.2.2 For driver's seats with adjustable suspension systems, they should be adjusted to the following state: after the measuring device and all the specified weights are placed on them, the suspension system should be in the middle position of the maximum vibration range. During the measurement of the driver's seat landmark points, the suspension system can be mechanically locked in this position.
3.2.3 For driver's seats with non-adjustable suspension systems, the measuring device and all the specified weights should be placed on them and locked in the position. 3.3 Method for measuring driver's seat landmark points
Use the device shown in Figure 2 and determine the driver's seat landmark points according to the following procedure. 3.3.1 Place the driver's seat landmark point measuring device (hereinafter referred to as SIP device) on the driver's seat cushion, and make the longitudinal center planes of the two coincide, and push it backwards so that it is attached to the backrest of the driver's seat. 3.3.2 Add a 20kg weight to the SIP device, so that the total weight of the device increases from 6±1kg to 26±1kg. The gravity point of this weight should be 30mm in front of the SIP mark (170mm in front of the rear surface of the backrest of the SIP device). 3.3.3 As shown in Figure 1, apply a horizontal force of about 100N to the device twice at the SIP. 3.3.4 Add a 39kg weight to increase the total weight of the SIP device from 26±1kg to 65±1kg. The gravity point of the added weight is the same as that of Article 3.3.2.
3.3.5 Determine the position of the SIP relative to the driver's seat according to the position defined in Chapter 2 of this standard. Approved by the Ministry of Machinery Industry on July 29, 1993
Implemented on January 1, 1994
Marking point of the number of views
JB/T6715-1993
Measurement status
Backing board
Driving seat marking point measuring device
Additional instructions:
JB/T6715-1993
This standard is proposed by the National Technical Committee for Tractor Standardization. This standard is under the jurisdiction of the Luoyang Tractor Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Luoyang Tractor Research Institute of the Ministry of Machinery Industry. The main drafter of this standard is Shi Ganqing.
This standard replaces the original GB6236-86 "Driving seat marking point of agricultural tractors". 3
People's Republic of China
Mechanical Industry Standard
Agricultural Tractor Driver Seat Marking Point
JB/T 67151993
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
1/16 Printing Sheet 3/8 Words 4,000
Format 880×1230
First Edition in December 1993
First Printing in December 1993bzxz.net
Print Quantity 1-500
Price 3.00 Yuan
Mechanical Industry Standard Service Network: http://www.JB.ac.cn66_9
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