This standard specifies the terms and definitions of dimensions of motor vehicles and trailers. This standard does not specify the measurement method, measurement unit, precision and order of magnitude of dimensions. This standard applies to motor vehicles and trailers specified in the national standard GB 3730.1 "Terms and definitions of motor vehicles and semi-trailers / vehicle types"? GB/T 3730.3-1992 Terms and definitions of motor vehicles and trailers Vehicle dimensions GB/T3730.3-1992 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Terms and definitions of motor vehicles and trailers
Vehicle dimensions
Motor vehicles and towed yehicles-Dimensions of vehicles
-Terms and definitions
GB/T3730.3-92
Replaces GB3730.3--83
This standard adopts the international standard ISO612-1978 "Terms and definitions of motor vehicles and trailers - Dimensions of vehicles". 1 Subject content and scope of application
This standard specifies the terms and definitions of dimensions of motor vehicles and trailers. This standard does not specify the measurement method, measurement unit, precision and order of magnitude of dimensions.
This standard applies to motor vehicles and trailers specified in the national standard GB3730.1 "Terms and definitions of motor vehicles and semi-trailers - Vehicle types".
2 General Provisions
2.1 Vehicle Support Plane (X-Plane for short) A flat, solid horizontal plane used to support the wheel when measuring vehicle dimension parameters. 2.2 Wheel Center Plane
For single-type wheels, the wheel center plane is a plane equidistant from the inner edges of the wheel rim on both sides. For double-type wheels, the wheel center plane is a plane equidistant from the inner edge of the outer wheel rim and the outer edge of the inner wheel rim. 2.3 Wheel Center
The intersection of the wheel center plane and the wheel rotation centerline. 2.4 The perpendicular bisector plane of the vehicle longitudinal symmetry plane (Y-Plane for short). Points A and B are the intersection points of the intersection line △ of the perpendicular plane of the X-plane passing through the wheel axes at both ends on the same axis and the wheel center plane and the X-plane (see figure). Approved by the State Bureau of Technical Supervision on August 15, 1992 and implemented on April 1, 1993
3 Terms
vehicle length
motor vehicle
length
trailer length
GB/T 3730.3--92
The distance between two planes passing through the outermost ends of the front and rear of the vehicle and perpendicular to the Y and X planes
full trailer includes and excludes towing
full trailer Two lengths of the length bar, that is, the distance between the two planes passing through the front end point of the trailer drawbar or the front end point of the trailer body and the rear end point of the trailer body and perpendicular to the Y and X planes. Semi-trailer length scmi-trailer length vehicle width vehicle height (unladen mass) vehicle height (unladen) wheel space GB/T 3730.3— 92
The distance between two planes passing through the front end point of the semitrailer body or the axis of the towing pin and the rear end point of the semitrailer body and perpendicular to the Y and X planes
The distance between two planes passing through the outermost points of the fixed protrusions on both sides of the vehicle (excluding rearview mirrors, side marker lights, position lights, turn indicators, flexible fenders, folding pedals, anti-skid chains and deformed parts of the tires in contact with the ground) and parallel to the Y plane
The distance from the highest point of the vehicle to the X plane
motor vehicle or
full trailer wheel
semj-trailer
wheel space
GB/T 3730.3
The distance between two planes passing through the A or (B) points of two adjacent wheels on the same side of the vehicle (see (2.4)
and perpendicular to the ' and X planes! )
The distance between two planes passing through the axis of the semitrailer's traction pin and the center of the semitrailer's wheel and perpendicular to the Y and X planes!
front overhang
rcar overhang
GB/T3730.3—92
The distance between two points on the wheels A and B (see 2.4) on the same axle
The distance between two planes passing through the frontmost point of the vehicle (including the front tow hook, the license plate and any rigid parts fixed to the front of the vehicle) and the center of the front wheels and perpendicular to the Y and X planes
The distance between two planes passing through the center of the two wheels of the rear axle of the vehicle and the rearmost point of the vehicle (including the towing device, the license plate and any rigid parts fixed to the rear of the vehicle) and perpendicular to the Y and X planes
Minimum ground clearance
ground clearance
Longitudinal passing angle
ramp angle
approach angle
approach angle
departure angle
height of chassis
above ground
GB/T 3730.392
The distance from the lowest point in the middle area of ​​the vehicle to the X-plane. The middle area is the part contained between two planes which are parallel to the Y-plane and equidistant from it. The distance between the two planes is the minimum distance between the inner edges of the wheels at both ends on the same axis. The minimum acute angle between the two sections of the outer edges of the wheels when two planes which are respectively tangent to the outer edges of the front and rear tires of the statically loaded wheels and are perpendicular to the Y-plane intersect at the lower part of the vehicle body. This angle is the maximum angle that the vehicle can exceed. It is the maximum acute angle between the plane tangent to the outer edge of the static front wheel tire and perpendicular to the Y plane and the X plane. Any rigid parts fixed to the vehicle in front of the front axle are above this plane. It is the maximum acute angle between the X plane and the plane tangent to the outer edge of the tire of the rearmost static vehicle wheel. Any rigid component fixed to the vehicle behind the rearmost axle is on this plane
The distance between the intersection of the plane passing through the two wheel centers of the rearmost axle of the vehicle and perpendicular to the
X-plane and the upper surface of the frame under the conditions of the factory-specified maximum gross mass and
vehicle curb mass
maximum usablebzxZ.net
length of chassis
behind cab (vehicle
with cab)
bodywork length
body work length
of passenger car
and bus
bodywork length
of chassis with
driver's cab.
The largest dimension inside the vehicle box
GB/T3730.3-—92
The distance between the two planes perpendicular to the Y and X planes passing through the frontmost point of the frame on which the cargo box can be installed and the rearmost point of the frame
The distance between the two planes E
and F which are perpendicular to the Y and X planes2). The positions of the two vertical planes E and F are defined in
3.14.1 and 3.14.2
E plane passes through the frontmost point of the vehicle body,
F plane passes through the rearmost point of the vehicle body
E plane passes through the frontmost point of the box behind the cab,
F plane passes through the rearmost point of the vehicle body
refers to the length, width
maximum internal
and height of the box (internal protrusions such as wheel covers, local reinforcement ribs, hooks, etc. can be ignored) 3)
dimensions of
drawgear length
draw bar length
position of towing
attachment
overhang of tow-.
ing attachment
GB/T3730.3--92
When the drawbar is in the front position, the distance from the center line of the drawbar pin hole perpendicular to the X plane to the plane passing through the center of the front wheel of the trailer and perpendicular to the X plane
When the drawbar is in the front position, the distance from the center line of the drawbar pin hole perpendicular to the X plane to the plane passing through the axis of the connecting pin fixed to the drawbar on the trailer and perpendicular to the X plane
The following The distance from the point or surface of various traction devices to the V plane passing through the axis of the rear axle of the vehicle and perpendicular to the X plane: a. Ball-head traction device
The center of the ball
b. Fork-pin U-shaped traction device
The apple passing through the axis of the fork pin hole and parallel to the V plane
c. Tow hook traction device
The center of the meridian section of the annular tow hook (the center line of the section is perpendicular to the X plane)
Height of traction device
distance of towing
attachment
distance of towing
atachment in front
of rear of vehicle
fifth-wheel lead
fifth-w heel lead
for calculation of
length
fifth--w heel lead
for calculation of
mass distribution
GB/T 3730.3-- 92
The distance from the following points or surfaces of the traction devices to the X plane:
i. Ball-head traction device - the center of the ball head;
b. Forked U-shaped traction device - a horizontal plane equidistant from the two inner surfaces of the forked U-shaped device;
℃. Towing hook traction device
The center of the meridian section of the annular towing hook (the center line of the section is perpendicular to the X plane)
The point or surface of the three types of traction devices a, b and c specified in 3.18.1 to the rear end point of the vehicle body (excluding the hinge of the tailgate)
pin, etc.). distance between the vertical line passing through the center of the towing pin hole of the towing wheel of the semitrailer towing vehicle and passing through the axis of the rearmost wheel of the semitrailer towing vehicle and perpendicular to the X plane distance between the two planes passing through the axis of the longitudinal swing of the towing wheel of the semitrailer towing vehicle and the axis of the rear wheel of the semitrailer towing vehicle and perpendicular to the X plane height of coupling distance between towing device and front end of towing vehicle distance between jaw and front distance bet ween
fifth - w hee!
coupling pin and
front end of
towing vehicle
rear fitting radius
of semi- trailer
towing vehicle
rear tractor
clearance radius
of semi -- trailer
GB/T 3730.3-92 The distance from the joint surface of the towing saddle in the horizontal position to the X plane passing through points or planes of various towing devices (see ab and c of 3.18.1) and the distance from the vertical line through the center of the towing pin hole of the fifth wheel to the vertical line passing through the frontmost point of the vehicle and perpendicular to the Y and X planes. Distance between the center of the fifth wheel pin hole of the semi-trailer to the projection point of the farthest point on the rear end of the tractor on the X plane. Horizontal distance between the axis of the fifth wheel pin and the nearest point on the cylindrical surface or other downward protruding surface of the semi-trailer gooseneck on the Y plane. Front fitting radius of semi-trailer camber angle kingpin inclination kingpin offset offset
GB/T3730.3--92
The distance from the axis of the semitrailer's traction pin to the farthest point of the semitrailer's front end from the axis of the traction pin in the X plane
In the plane passing through the wheel axis and perpendicular to the X plane, the acute angle between the wheel axis and the horizontal
In the plane perpendicular to both the Y and X planes, the acute angle formed by the projection of the axis of the real or imaginary steering kingpin on this plane and the perpendicular to the X plane
The distance from the intersection point C of the kingpin axis and the X plane to the projection of the intersection of the wheel center plane and the X plane in the Y plane
CA, the CA value shown in the figure is positive
toe- in
castor
vertical clearance
of wheel
lift of wheel
GB/T 3730.3—92
The endpoints of the horizontal diameter of the inner wheel
outline of the wheel rims at both ends of the same axis are the vertices of the isosceles trapezoid, and the difference between the front
and rear base lengths of the isosceles trapezoid is the toe-in. When the front base of the trapezoid is smaller than the rear base,The toe-in is positive, and vice versa. The angle between the horizontal diameter of the wheel and the Y plane is the toe-in angle. The distance between the two intersections of the plumb line through the center of the wheel and the projection line of the real (or imaginary) steering kingpin axis on the Y plane and the X plane is the kingpin rear inclination. The acute angle between the two projection lines is the kingpin caster angle. The maximum vertical distance that the wheel can move upward relative to the frame (or body) from the position at the maximum total mass specified by the vehicle manufacturer. When the other wheels do not leave the X plane, the distance from the lowest point of the wheel at one end of the axle to the X plane at the height that can be raised. The direction of travel.
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