JB/T 9719-1999 This standard is a revision of ZB J83 013-89 "Terms of Steering System of Wheeled Engineering Machinery". During the revision, editorial changes were made in accordance with relevant regulations, and some term definitions were modified or amended. This standard specifies the classification, components, technical parameters and characteristics of steering systems of wheeled engineering machinery. This standard applies to steering systems of wheeled engineering machinery. This standard was first issued on May 13, 1989. JB/T 9719-1999 Terms of Steering System of Wheeled Engineering Machinery JB/T9719-1999 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T 9719—1999
Wheel construction machinery
Steering system terms
Wheel construction machinery--Steering system terms1999-08-06 Issued
National Machinery Industry Department
2000-01-01 Implementation
.1B/T9719—1999
This standard is a revision of ZBJ83013-89 Wheel construction machinery--Steering system terms, and has collected or revised the definitions of some terms. This standard will be implemented from 2BJ83013—89. This standard was proposed and approved by the Technical Committee for Standardization of Machinery, and the drafting unit of the standard is Tianjin Engineering Machinery Research Institute. The main drafters of this standard are Liu Zongquan and Ma Hongxiang. The standard was first issued on May 13, 1989, and the terminology of the standard was revised. During the revision, the standard was edited.
Machinery Industry Standard of the People's Republic of China
Wheeled Engineering Machinery
Steering System Terminology
Wheel eutistruetlon machinarySteerlig system tcrms
JB/I9719—1999
Reference: J8301389
4 This standard specifies the classification, components, technical characteristics and characteristics of the steering system of wheeled engineering machinery. This standard classifies terminology for mechanical steering systems. 2.1 Manual steering systems are systems that are used to change the direction of travel of the vehicle. 2.2 Power steering systems are systems that use the driver's manual force to reduce the driver's manual force. 2.1.1 Hydraulic power steering systems are systems that use the driver's manual force to provide a simulated steering action. 2.2.2 Hydraulic power steering systems are systems that rely entirely on the power of the driver to control the steering. a) Flow hydraulic steering system b) Coistant pressure hydraulic steering system c Load sensing steering system 3 Components and parts terminology || TT || 3.1 Steering control mechanism Succring control mechanism The mechanism whereby the driver operates the steering gear. 3.1. Soft shaft sleering inner articulated shatt 3.1.2 Sleering column 3.1.3 Steering wheel (steering) 3.2 Inanual steering gear The mechanism that converts the rotation of the rotating wheel into the rotation of the steering wheel and amplifies the torque according to a certain transmission ratio. 3.2. Recirculating ball steering gear Recirculating ball rack and sector steering gear Recirculating ball rack and sector steering gear Recirculating ball steering gear with rack and gear transmission system. 3.2.1.2 Recirculating ball steering gear Recirculating ball rack and sector steering gear with pinion and pinion transmission system. 3.3 Power steering gear A device used to reduce the driver's finger force by using power. 3.3.1 Integral power steering gear A steering control valve, a steering cylinder and a mechanical steering gear are combined into a "whole steering gear". 5.3. Semi-integral power steering gear A steering control valve and a mechanical steering gear are combined into a whole steering gear. 3.3.3 Full-hydraulic steering gear A steering gear that is completely controlled by pressure and can also achieve manual steering after the engine is started. A hydraulic steering gear with a micro-steering gear A hydraulic steering gear with a steering control that is normally closed in the middle position and the working system pressure remains unchanged. b) Constant flow hydraulic steering gear A hydraulic steering gear with a steering control that is normally open in the middle position and the working system flow remains unchanged. c) Load sensing steering gear 3.3.4 Steering control valve is used to change the power transmission line in the steering gear. 3.3.4.1 Spool valve type rotary control valve Spool valve type Steering control valve that makes linear movement for the valve a) hausing valve b) spoel valve 3.3.4.2 Rotary steering control valve Rotary valve type Steering control valve that rotates relative to the valve body: valvespool b) valve bush 7.7.5 Steering action power steering cylinder is an actuator that uses the power provided by pressure energy to perform the same function as boosting. 3.3.6 Steering oil pump is a pressure element used in steering to convert the power of the steering wheel into pressure energy. 3.3.7 Steering oil reservoir is a container used for filtering and cooling the compressed oil. 3.3. Steering oil tank ... 1.4.1 Steering draw link3.4.3 Steering knuckle3.4.4 Tier-type linkageaekermangeomctry: The actuator that makes a relatively large movement in a certain relationship with the wheel. Integral trapezoidal mechanism singlelie'rod lypelierodlinkuge3.4.1.1
The cross-tie rod is an integral trapezoidal mechanism. a) Trapezoidal arm tieTodarm
by steering tie rod
The rod that transmits force and movement is connected inversely to the right and left. c) Joint 5ncket
d Horizontal tie-drawn machine
3.4.4.2 Split tierod type tie-md linkagc The steering tie rod is a segmented trapezoidal mechanism. 4 Steering system technical terms
+.1 Steering system angle transmission ratio: steeringtystemangletitia The ratio of the increase in the steering wheel angle to the corresponding increase in the steering knuckle angle, 4.1. Steering system angle transmission ratio steeringearanglerlo The ratio of the increase in the steering wheel angle to the corresponding increase in the steering shaft angle: 41.z Steering gear transmission ratio steering jinkage angle ratio The ratio of the target angle increment during steering and the corresponding knuckle angle increment on the same side. 42 Steering gear efficiency The ratio of the steering gear output power to the input power 1.2.1 Forward efficiency The ratio of the steering shaft output power to the input power of the same shaft, 4.2.2 Reverse efficiency The ratio of the steering shaft output power to the output power of the opposite shaft. 4.3 Steering system stiffness The ratio of the torque input to the angular displacement generated when the steering joint is fixed. 4.4 Wheel stiffness The ratio of the torque input to the angular displacement generated when the steering joint is fixed. 4. Total number of turns The number of turns made by the steering wheel on a vehicle from one extreme position to the other. Total rotation of steering gear The number of turns made by the steering gear when the steering wheel is turned from one extreme position to the other. 4.7 Steering wheel play The relative idle angle between the steering wheel and the steering wheel when the steering wheel is in a straight-line driving position. 4.s Steering gear clearance The sum of the transmission clearances between the steering gear brushes. J.9 Maximum total swing angle of pitman arm shatt The steering arm angle corresponding to the steering gear total rotation angle H. 4.1d Maximum swing angle of steering pitman The steering swing angle on the vehicle relative to the steering point total rotation angle. 4.12 Reversing torque The torque that causes the steering shaft to rotate when the steering gear rocker arm is in the idle state. 4.13 Steering moment The torque acting on the steering wheel when the steering wheel is rotating. 4.14 Steering resisting torque The sum of the resisting torque acting on the steering wheel when the steering wheel is rotating and the internal resisting torque of the steering gear into the steering wheel. Steering torque 1.15
The maximum allowable torque of the steering specified in the design. Maximum working pressure max.workingpressure
The maximum working pressure of the power steering system when it stops safely, rated working pressure, ratedworkingpressure4.17
The central working pressure specified when the power steering is designed. 4.18 Theorctical displacement of the steering pump is specified in the design of the steering pump. 4.19 Theorctical flow is the flow through the pipeline, which exceeds the limit without any loss of flow. 4.Limited flow book Liriledflw
The flow limited by the control valve:
+.z1Pre-openedpiayafstteringcontolvalve is in the middle position, the axial or angular distance between the shoulder pin and the valve body shoulder is 4.22The totally-openedplaynfstceringcontrolvalve is in rotation, the distance or angle between the shoulder and the valve body shoulder is 4.23
Under the nominal pressure, the total leakage of the two oils per unit time with high cavity flow and low pressure, JB/T719-1999
4.24Steering control/i force reduction pressuretossesinsteeringcoatrolvalveUnder the nominal flow, the oil flow is the pressure difference between the inlet and outlet of the steering control foot. 5 Steering system characteristics
.1 Steering gear angle ratio characteristic The relationship between the steering gear angle ratio and the steering shaft angle. 5.2 Steering gear transmission characteristic steering gear efficiency characteristic The relationship between the steering gear transmission efficiency and the steering shaft angle. 5.3 Steering gear transmission efficiency characteristic steering gear efficiency characteristic The relationship between the steering gear transmission efficiency and the steering shaft angle. 5.4 Steering Jr characteristic steering farce characteristic In a mechanical steering system, the relationship between the output torque of the steering shaft and the input torque of the steering shaft: In a power steering system, under rated conditions, the relationship between the system torque and the input torque of the steering shaft. 5.5 Power steering system sensitivity characteristic power steering a respons ive characteristic The relationship between the system force and the steering wheel angle when the steering oil pump flow is a constant. S.6 Steering control valve pressure loss characteristics Steering control valve pressure loss characteristics Steering control valve pressure loss characteristics 5.7
The relationship between the output force and displacement of the steering control valve.15
The maximum allowable torque of the gearbox specified in the design. Maximum working pressure max.workingpressure
The maximum working pressure limited by the power steering system for safety, rated working pressure, ratedworkingpressure4.17
The central working pressure specified when designing power steering. 4.18 The heorctical displaccmentafpump The output per revolution specified in the design of the steering pump. 4.19 Theorcticaltlow
The flow through the pipeline without any loss. 4.Limited flow book Liriledflw
The flow limited by the control:
+.z1 The control valve is in the preopenedpiayafstteringcontolvalve position, and the axial or angular distance between the shoulder pin and the valve body shoulder is 4.22 The rotation is specified! totally-openedplaynfststceringcontrolvalveWhen the steering controlvalve is turned, the distance or angle between the platform and the shoulder of the steering control valve is the total leakage of the oil in the high cavity and low pressure per unit time under nominal pressure, JB/T719-1999bzxZ.net
4.24steering control/force droppressuretossesinsteeringcoatrolvalveUnder nominal flow, the difference in oil flow between the inlet and outlet of the steering control valve. 5steering system characteristics
.1steering gear angle ratiocharacteristicsteering gear angle ratio and steering shaft angle. 5.2steering gear transmission characteristicssteeringearclcerancechacteristicsteering gear transmission source and steering shaft angle. 5.3 Steering gear efficiency characteristic The relationship between the steering gear efficiency and the steering shaft angle. 5.4 Steering Jr characteristic steering farce characteristic In a mechanical steering system, the relationship between the output torque of the steering shaft and the input torque of the steering shaft: In a power steering system, under rated conditions, the relationship between the system torque and the input torque of the steering shaft. 5.5 Power steering system sensitivity characteristics powt tsttering aem responsive characteristics The relationship between the system force and the steering wheel angle when the steering oil pump flow is a constant. S.6 Steering control valve force loss characteristics The relationship between the force drop of the steering control valve and the oil flow rate. Steering control valve responsiveness characteristics steering control valve responsiveness characteristics 5.7
The relationship between the output force of the steering control valve and its displacement.15
The maximum allowable torque of the gearbox specified in the design. Maximum working pressure max.workingpressure
The maximum working pressure limited by the power steering system for safety, rated working pressure, ratedworkingpressure4.17
The central working pressure specified when designing power steering. 4.18 The heorctical displaccmentafpump The output per revolution specified in the design of the steering pump. 4.19 Theorcticaltlow
The flow through the pipeline without any loss. 4.Limited flow book Liriledflw
The flow limited by the control:
+.z1 The control valve is in the preopenedpiayafstteringcontolvalve position, and the axial or angular distance between the shoulder pin and the valve body shoulder is 4.22 The rotation is specified! totally-openedplaynfststceringcontrolvalveWhen the steering controlvalve is turned, the distance or angle between the platform and the shoulder of the steering control valve is the total leakage of the oil in the high cavity and low pressure per unit time under nominal pressure, JB/T719-1999
4.24steering control/force droppressuretossesinsteeringcoatrolvalveUnder nominal flow, the difference in oil flow between the inlet and outlet of the steering control valve. 5steering system characteristics
.1steering gear angle ratiocharacteristicsteering gear angle ratio and steering shaft angle. 5.2steering gear transmission characteristicssteeringearclcerancechacteristicsteering gear transmission source and steering shaft angle. 5.3 Steering gear efficiency characteristic The relationship between the steering gear efficiency and the steering shaft angle. 5.4 Steering Jr characteristic steering farce characteristic In a mechanical steering system, the relationship between the output torque of the steering shaft and the input torque of the steering shaft: In a power steering system, under rated conditions, the relationship between the system torque and the input torque of the steering shaft. 5.5 Power steering system sensitivity characteristics powt tsttering aem responsive characteristics The relationship between the system force and the steering wheel angle when the steering oil pump flow is a constant. S.6 Steering control valve force loss characteristics The relationship between the force drop of the steering control valve and the oil flow rate. Steering control valve responsiveness characteristics steering control valve responsiveness characteristics 5.7
The relationship between the output force of the steering control valve and its displacement.
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