This standard specifies the terminology for dimensions of motorcycles and mopeds. This standard applies to motorcycles and mopeds as specified in GB/T 5359.1 "Terminology for motorcycles and mopeds - Vehicle types". GB/T 5359.7-1996 Terminology for motorcycles and mopeds - Dimensions of tricycles GB/T5359.7-1996 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Terms for motorcycles and mopeds
Dimensions of three-wheeled vehicles
Term for motorcycles and mopeds-Dimensions of vehicle with three wheels1 Subject content and scope of application
This standard specifies the terms for dimensions of three-wheeled motorcycles and three-wheeled mopeds. GB/T 5359.7—1996
Replaces GB5359.2—85
This standard applies to three-wheeled motorcycles and three-wheeled mopeds as specified in GB/T5359.1 "Terms for motorcycles and mopeds-Vehicle types".
Cited standards
GB/T5359.1Terms for motorcycles and mopeds-Vehicle types GB/T5359.3Terms for motorcycles and mopeds-Dimensions of two-wheeled vehicles3 General
Unless otherwise specified, the following provisions shall be met: a. The supporting surface of the vehicle is horizontal, the length and width are measured in the horizontal plane, and the height is measured in the vertical plane; b. The vehicle mass is the maximum total mass set by the factory; c. The tires are inflated to the pressure corresponding to the maximum total mass set by the factory; d. The vehicle is stationary, the engine is not running, and the wheels are in a straight-line driving position; the doors and windows of the three-wheeled vehicle are closed; Note: The content of this article does not apply to Articles 5.22 and 5.23. e. The vehicle is a new vehicle equipped according to the standard by the manufacturer; f. The wheels of the vehicle are all placed on the supporting surface; g. "Wheel center plane" refers to the plane equidistant from the inner side of the rim flange; h. "Wheel center" refers to the intersection of the wheel center plane and the wheel rotation axis. 4 Reference plane and longitudinal center plane
4.1 Reference plane
The reference plane is the X, Y, and Z planes in the three-dimensional orthogonal coordinate system (see Figure 1). Among them: Z——horizontal plane (supporting surface);
Y-—vertical plane,
-a plane perpendicular to Y and Z.
Approved by the State Administration of Technical Supervision on July 23, 1996, 78
Implemented on March 1, 1997
GB/T5359.7-1996
4.2 Longitudinal center plane
a. The longitudinal center plane of a three-wheeled vehicle is the vertical plane Y that passes through the midpoint of the line segment AB and is perpendicular to the line segment AB. Points A and B are the intersection points of the intersection of the vertical plane passing through the wheel axes at both ends of the same shaft and the wheel center plane and the wheel support surface (see Figure 2). Note: The longitudinal center plane of a three-wheeled vehicle is also called the longitudinal symmetry plane of the three-wheeled vehicle or the reference Y plane. 5
b. The longitudinal center plane of a sidecar is the longitudinal center plane of the two-wheeled vehicle when no sidecar is installed, see Article 4.2 of GB/T5359.3. 5 Terminology
5.1 Vehicle lengthvehiclelength
The distance between two planes perpendicular to the longitudinal center plane, in contact with the front and rear ends of the vehicle respectively and parallel to the X plane (see Figure 3). Note: Except for the spare wheel, all vehicle parts and front and rear protrusions (bumpers, fenders, etc.) are between these two planes. 79
5.2 Vehicle widthvehiclewidth
GB/T5359.7—1996
The distance between two planes parallel to the longitudinal center plane, in contact with the two sides of the vehicle respectively (see Figure 4). Note: Except for the rearview mirror, all vehicle parts and laterally protruding fixed parts are between these two planes. Figure 4
5.3 Vehicle heightvehicleheight
The distance between the horizontal plane in contact with the top of the vehicle and the support surface (see Figure 5). Note: Except for the rearview mirror, all vehicle parts are between these two planes. Figure 5
5.4 Wheelbase
wheel base
GB/T5359.7-1996
The distance between two planes passing through the center of the wheel and parallel to the X plane (see Figure 6). Figure 6
5.5 Track
a. The track of a three-wheeled vehicle is the sum of the distances AH and BH from points A and B to the longitudinal center plane (see 4.2a for the definition of A and B) (see Figure 7). Y
b. The track of a sidecar vehicle is the distance from the center of the sidecar vehicle to the longitudinal center plane (see Figure 8). Figure 8
5.6 Front overhang
The distance between the plane passing through the center of the front wheel and parallel to the X plane and the front end of the vehicle (including additional rigid parts) (see Figure 9). 81
5.7 Rear overhang
GB/T 5359.7—1996
The distance between the plane passing through the center of the rear wheel and parallel to the X plane and the rear end of the vehicle (including additional rigid parts) (see Figure 10). Figure 10
5.8 Ground clearance
The distance between the lowest point of the vehicle within the wheelbase and the supporting surface, excluding wheels and fenders (see Figure 11). Figure 11
5.9 Longitudinal rampangle
When the intersection of two planes perpendicular to the longitudinal center plane and tangent to the front and rear wheels of the vehicle touches the lower part of the inner wheelbase of the vehicle, the minimum angle between the two planes is the longitudinal rampangle. This angle is the maximum slope angle that the vehicle can pass (see Figure 12). Note: This definition does not apply to sidecars. 82
5.10 Approach angle
approach angle
GB/T5359.7—1996
The maximum angle between the plane perpendicular to the longitudinal center plane and tangent to the front wheel and the support surface. There are no vehicle parts or additional rigid parts of the vehicle within this angle (see Figure 13). Figure 13
5.11 Departure angle departureangle
The maximum angle between the plane perpendicular to the longitudinal center plane and tangent to the rear wheel and the support surface. There are no vehicle parts or additional rigid parts of the vehicle within this angle (see Figure 14). Figure 14
5. 12 Height of chassis above ground The distance from the vehicle support plane to the horizontal line perpendicular to the longitudinal center plane of the vehicle and touching the upper surface of the frame. The distance is measured on the center line of the axle (see Figure 15). Note: In addition to being determined under the factory-specified maximum total mass, the height of the chassis above ground should also be determined at the fully equipped mass of the vehicle. 83
GB/T5359.7
5.13 Maximum usable length of chassis behind cab (vehicle with cab)
maximum usable length of chassis behind cab The distance between two planes C and D perpendicular to the longitudinal center plane of the vehicle. Vertical plane C is the frontmost plane that can be used to install the cargo compartment. Vertical plane D is the plane against the rear end of the frame (see Figure 16). Figure: 16
5.14 Maximum internal dimensions of body The maximum internal dimensions of the body of a three-wheeled vehicle are the length, width and height of the body (excluding internal protrusions such as wheel covers, local reinforcement ribs, hooks, etc.) (see Figure 17).
Note: If the inner wall or roof is a curved surface, the dimensions should be measured between two planes (vertical or horizontal) that cut the highest point of the curved surface. Figure 17
5.15 Camberangle
The acute angle between the wheel axis and the horizontal line in the vertical plane through the wheel axis (see Figure 18). Note: This angle is also equal to the acute angle between the vertical line and the wheel center plane. 84
5.16 Kingpin inclinationGB/T5359.7-1996
The acute angle between the vertical line and the real or imaginary steering knuckle kingpin axis on a plane perpendicular to the longitudinal center plane of the vehicle (see Figure 19).
5.17 Kingpin offsetThe distance from the intersection of the extension of the steering knuckle kingpin axis and the support surface to the intersection of the wheel center plane and the support surface (see Figure 20).
Note: The kingpin offset shown in the figure is positive.
5.18 Toe-in
5.18.1 Toe-in (length) a positive tricycle toe-in is the horizontal diameter of the inner contour line of the wheel rims at both ends of the same axis. The endpoints are the vertices of the isosceles trapezoid. The difference between the front and rear base lengths of the trapezoid is the toe-in. When the front base of the trapezoid is smaller than the rear base, the toe-in is positive, otherwise it is negative (see Figure 21).
GB/T5359.7—1996
b, the toe-in of a sidecar tricycle is the vertical line from the end point of the horizontal diameter of the inner contour line of the sidecar rim to the longitudinal center plane, and the difference between the lengths of the front and rear bases of the trapezoid is the toe-in. When the front base of the trapezoid is smaller than the rear base, the toe-in is positive. Otherwise it is negative (see Figure 22).
toe-in (angle)
5.18.2 Toe-in (angle)bzxz.net
The angle between the horizontal diameter of the wheel and the longitudinal center plane of the vehicle or the angle α between the vertical plane G passing through the wheel axis and the vertical plane H perpendicular to the longitudinal center plane of the vehicle (see Figure 23). Figure 23
5.19 Castor
The distance between the plane passing through the steering column axis and perpendicular to the Y plane and the plane passing through the center of the front wheel and parallel to the X plane at the intersection of the Y plane and the Z plane (see Figure 24). Note: In the driving direction, when the force point is before 9 o'clock, the value is positive. When point p is after point, the value is negative. 86
Driving direction
GB/T5359.7—1996
Axis of steering column
5.20 Castorangle
The acute angle between the plane passing through the axis of the steering column and perpendicular to the Y plane and the plane passing through the center of the front wheel and parallel to the X plane (see Figure 25).
Driving direction
Axis of steering column
5.21 Residual vertical wheel clearance The vertical distance moved by the vehicle suspension relative to the wheel when it is loaded from the position of the factory-determined maximum total mass to the position where it can no longer move in the vertical direction (see Figure 26). Figure 26
GB/T5359.7-1996
5.22 Turning circle diameter turning circle diameter The diameter of the largest circle tangent to the wheel center plane on the support surface when the vehicle is running with the steering wheel turned to the extreme position (see Figure 27). Note: Each vehicle has a left turning circle diameter and a right turning circle diameter. Figure 27
5.23 Turning clearance circle diameters The diameter of the circle measured in accordance with the following provisions when the vehicle is running with the steering wheel turned to the extreme position (see Figure 28). a. The diameter of the largest circle drawn by the outer side of the projection of all vehicle parts on the support surface; b. The diameter of the smallest circle drawn by the inner side of the projection of all vehicle parts on the support surface. Note: Each vehicle has a left turning clearance circle diameter and a right turning clearance circle diameter. Figure 28
Height of frame from the ground
Maximum dimensions inside the vehicle compartment·
Camber
Approach angle
GB/T5359.7—1996
Appendix A
Chinese index
(reference)
Departure angle·
Maximum usable length of frame behind cab (vehicles with cab)
Ground clearance
approach angle
camber angle
castor
castor angle
departure angle.
Toe-in (length)
Toe-in (angle)
Reach
Reach angle
Remaining vertical wheel clearance·
Longitudinal passing angle
Kingpin inclination
Kingpin lateral offset·
Turning circle diameter
Turning channel circle diameter·
Appendix B
English index
(reference)
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