CN-121994099-A - Detection tool for measuring form and position tolerance of outer cylinder of oil pressure shock absorber for railway vehicle
Abstract
A detection tool for measuring form and position tolerance of an outer cylinder of an oil pressure damper for a railway vehicle relates to the technical field of rail transit dampers, and can effectively improve the running reliability and service life of the damper. The detection tool for measuring the form and position tolerance of the oil pressure shock absorber for the railway vehicle comprises a fixed reference block, a movable measuring block, a positioning nut, a positioning hole, a shaft sleeve of the movable measuring block, a second screw, an adjusting nut and an adjusting nut, wherein the first screw is matched with the end face of an outer cylinder body in the radial direction, the fixed reference block is provided with two circular arc grooves, a positioning shaft is arranged in the middle of the fixed reference block, the movable measuring block is provided with an installing groove, a side face corresponding to the installing groove is provided with a fastening bolt, the fastening bolt can be screwed down to tightly press an adjusting nut on the dial indicator, the dial indicator is fixed, the positioning hole is arranged in the middle of the movable measuring block, the shaft sleeve of the dial indicator is provided with the second screw, the second screw is matched with the adjusting nut, the installing height of the dial indicator can be adjusted by screwing the adjusting nut, and the adjusting nut is placed in the installing groove of the movable measuring block and tightly pressed by the fastening bolt.
Inventors
- MO YANSEN
- HU HONGHUI
- WU XU
Assignees
- 深圳市业成实业有限公司
Dates
- Publication Date
- 20260508
- Application Date
- 20251231
Claims (1)
- 1. The detection tool for measuring the form and position tolerance of the outer cylinder of the oil pressure shock absorber for the railway vehicle is characterized by comprising a fixed reference block, a movable measuring block and a dial indicator; The fixed reference block is provided with two circular arc grooves in the radial direction and is used for rotating displacement during the measurement of the dial indicator, and a positioning shaft is arranged in the middle of the fixed reference block; the movable measuring block is provided with a mounting groove for placing the dial indicator, a fastening bolt is arranged on the corresponding side surface of the mounting groove, and the fastening bolt is screwed down to tightly press an adjusting nut on the dial indicator and fix the dial indicator; the shaft sleeve of the dial indicator is provided with a second thread, the second thread is matched with the adjusting nut, and the installation height of the dial indicator can be adjusted by screwing the adjusting nut; During measurement, the adjusting nut of the dial indicator is screwed to a corresponding position according to the size of an outer cylinder to determine the installation height of the dial indicator, then the adjusting nut of the dial indicator is placed in the installation groove of the movable measuring block, the fastening bolt is screwed to fix the dial indicator, the fixed reference block is screwed on the threads of the end face of the outer cylinder body, the measuring rod of the dial indicator is inserted into the circular arc groove of the fixed reference block, meanwhile the positioning shaft of the fixed reference block is inserted into the positioning hole of the movable measuring block, the movable measuring block is pressed and rotated, and the perpendicularity of the outer cylinder seat and the threads of the end face of the outer cylinder body can be measured by observing the reading maximum value of the dial indicator through the movement of the movable measuring block in the circular arc groove of the fixed reference block.
Description
Detection tool for measuring form and position tolerance of outer cylinder of oil pressure shock absorber for railway vehicle Technical Field The invention relates to the technical field of rail transit shock absorbers, in particular to a detection tool for measuring form and position tolerance of an outer cylinder of an oil pressure shock absorber for a rail vehicle. Background At present, the oil pressure shock absorber is a key part on the railway vehicle, and the quality of the working performance of the oil pressure shock absorber is directly related to the riding comfort and the safety of the railway vehicle. In recent years, along with the rapid development of high-speed railway technology in China, the speed of rail vehicles is continuously improved, and the requirements on the safety and stability of the shock absorber are also higher and higher. In this context, the requirements for the production process of the vibration damper and the dimensional tolerances of the components are also increasing. The outer cylinder is used as a carrier for generating the damping function of the shock absorber, whether the perpendicularity of the end threads of the outer cylinder relative to the base meets the requirement, plays an important role in stabilizing the operation of the shock absorber, and if the outer cylinder cannot meet the requirement, the piston rod of the shock absorber deflects relative to an oil seal, so that the piston rod is eccentric-worn or even leaked, and the service life and the stability of the shock absorber are seriously influenced. Specifically, among the prior art, be equipped with bottom valve, interior jar, direction lid in proper order on the shock absorber outer cylinder base, play fixed, the compaction effect by lock nut and the threaded connection of outer cylinder tip at last, when the screw straightness deviation of outer cylinder base and tip is too big, then can lead to the interior jar to appear inclining, and the piston that moves in the interior jar and the piston rod that is connected with the piston incline along with it, and then lead to the piston rod to appear the condition of eccentric wear. In addition, the outer cylinder is formed by welding an outer cylinder seat and an outer cylinder body, and the outer cylinder seat generally has two structural types of conical surfaces and planes, and the perpendicularity of the outer cylinder seat and the threads on the end surface of the outer cylinder cannot be directly measured. Therefore, how to provide a detection tool for measuring the form and position tolerance of an outer cylinder of an oil pressure shock absorber for a railway vehicle, which can ensure that the perpendicularity of threads of an outer cylinder seat and an outer cylinder end surface is controllable, and effectively ensure the coaxiality of internal components of the shock absorber, is a technical problem which needs to be solved by a person skilled in the art. Disclosure of Invention The invention aims to provide a detection tool for measuring the form and position tolerance of an outer cylinder of an oil pressure shock absorber for a railway vehicle, which can effectively improve the operation reliability and the service life of the shock absorber. In order to achieve the above purpose, the invention adopts the following technical scheme: A detection tool for measuring the form and position tolerance of an outer cylinder of an oil pressure shock absorber for a railway vehicle comprises a fixed reference block, a movable measuring block and a dial indicator; The fixed reference block is provided with two circular arc grooves in the radial direction and is used for rotating displacement during the measurement of the dial indicator, and a positioning shaft is arranged in the middle of the fixed reference block; the movable measuring block is provided with a mounting groove for placing the dial indicator, a fastening bolt is arranged on the corresponding side surface of the mounting groove, and the fastening bolt is screwed down to tightly press an adjusting nut on the dial indicator and fix the dial indicator; the shaft sleeve of the dial indicator is provided with a second thread, the second thread is matched with the adjusting nut, and the installation height of the dial indicator can be adjusted by screwing the adjusting nut; During measurement, the adjusting nut of the dial indicator is screwed to a corresponding position according to the size of an outer cylinder to determine the installation height of the dial indicator, then the adjusting nut of the dial indicator is placed in the installation groove of the movable measuring block, the fastening bolt is screwed to fix the dial indicator, the fixed reference block is screwed on the threads of the end face of the outer cylinder body, the measuring rod of the dial indicator is inserted into the circular arc groove of the fixed reference block, meanwhile the positioning shaft of the fixed reference