A measuring device for friction torque of electronic parking brake caliper screw transmission mechanism
An electronic parking brake and thread transmission technology, applied in measuring devices, force/torque/work measuring instruments, instruments, etc., can solve the problems of reducing transmission efficiency, difficult to obtain accurate values, and rising, so as to avoid transmission errors. Effect
Active Publication Date: 2021-08-27
SHANGHAI AUTOMOTIVE BRAKE SYST
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Problems solved by technology
[0002] In mechanical transmission, friction torque is an important factor affecting the life, reliability and accuracy of components. Friction torque may reduce transmission efficiency, cause wear and temperature rise of rotating pairs, reduce life and working quality, and affect safety
In the actuator of the electronic parking brake system, a screw transmission mechanism is often used to convert the rotary motion into a linear motion, and the friction torque of the screw transmission mechanism will affect the transmission efficiency and control of the actuator of the electronic parking brake system. The setting of the program needs to quantitatively detect and control the starting friction torque of the screw transmission mechanism. In view of the randomness and complexity of the friction torque, it is difficult to obtain its accurate value by means of theoretical analysis. Therefore, the direct quantitative measurement of the friction torque of the screw transmission research is important
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[0016] The present invention will be further described below according to the accompanying drawings.
[0017] like figure 1 As shown, the extension shaft of the motor 3 is connected to one end of the deceleration mechanism 2, the other end of the deceleration mechanism 2 is connected to the bottom of the screw 10, and the upper part of the screw 10 is sleeved with a nut 9; the outer edge of the nut 9 is connected to the guide wire One end of the guide wire 11 is connected to the force sensor 13 at the other end.
[0018] The top of the screw 10 abuts against the positioning structure 6 , and the positioning structure 6 is located on the positioning bracket 5 .
[0019] A limit switch 7 is connected to the positioning bracket 5 on one side of the positioning structure 6 .
[0020] The deceleration mechanism 2 is a two-stage worm gear transmission mechanism or a three-stage gear transmission deceleration mechanism.
[0021] A guide tube 12 is sleeved on the outer side of the ...
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The invention relates to the technical field of braking systems, in particular to a measuring device for the friction torque of a threaded transmission mechanism of an electronic parking brake caliper. A measuring device for the friction torque of the threaded transmission mechanism of an electronic parking brake caliper, including a test bench, a motor, a reduction mechanism, a screw, a nut, a force sensor, a guide wire, and a positioning bracket, is characterized in that: the extension shaft of the motor is connected to One end of the deceleration mechanism and the other end of the deceleration mechanism are connected to the bottom of the screw rod, and a nut is sheathed on the upper part of the screw rod; the outer edge of the nut is connected to one end of the guide wire, and the other end of the guide wire is connected to the force sensor. Compared with the prior art, a device for measuring the friction torque of the screw drive mechanism of the electronic parking brake caliper is provided, which can conveniently and quickly measure and record the change of the friction torque at different speeds, and can directly and effectively measure the friction torque of the screw nut in the air. Tiny friction torque under load conditions to avoid transmission errors caused by indirect measurement.
Description
technical field [0001] The invention relates to the technical field of braking systems, in particular to a device for measuring friction torque of an electronic parking brake caliper threaded transmission mechanism. Background technique [0002] In mechanical transmission, friction torque is an important factor affecting the life, reliability and accuracy of components. Friction torque may reduce transmission efficiency, cause rotating pair wear and temperature rise, reduce life and work quality, and affect safety. In the actuator of the electronic parking brake system, a threaded transmission mechanism is often used to convert the rotary motion into linear motion, and the friction torque of the threaded transmission mechanism will affect the transmission efficiency and control of the electronic parking brake system actuator. The setting of the program requires quantitative detection and control of the starting friction torque of the thread transmission mechanism. In view of...
Claims
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IPC IPC(8): G01L5/28
CPCG01L5/28
Inventor 王勇韩斌邵娟王渊文郑金虎
Owner SHANGHAI AUTOMOTIVE BRAKE SYST