CN-224216201-U - Wiper rubber strip friction force testing machine

Abstract

The utility model discloses a friction force testing machine for a wiper rubber strip, and relates to the technical field of wiper rubber strips. Solves the problem of inaccurate friction force of the device for testing the wiper rubber strip in the prior art. The device comprises a support, wherein a motor, a speed reducer, a torque sensor, a rotating shaft and a glass cylinder are assembled on the support, the motor works to drive the speed reducer to work, the torque sensor is driven to work, the rotating shaft is driven to rotate, the glass cylinder is driven to rotate, a wiper adhesive tape press-fitting adjusting mechanism is arranged on the support, a pressure sensor and a wiper adhesive tape clamping piece are arranged on the wiper adhesive tape press-fitting adjusting mechanism, and the wiper adhesive tape clamping piece and the outer side wall of the glass cylinder are arranged oppositely. The friction force tester for the wiper rubber strip is used for testing the friction force of the wiper rubber strip, the friction force is measured through a dynamic moment difference method, the inertia interference is eliminated, the measured data is accurate, a friction coefficient curve of the wiper rubber strip, which changes along with the change of the pressure of the wiper rubber strip pressed on the glass cylinder, is generated, and the accuracy of the friction force test of the wiper rubber strip is improved.

Inventors

• ZHOU JIN
• LI PENGYU
• SHAO FAN
• LIU PENGHUI
• WANG YUXIN

Assignees

• 成都华川电装有限责任公司

Dates

Publication Date

20260508

Application Date

20250430

Claims (8)

1. 1. The utility model provides a windscreen wiper strip friction testing machine, includes support (1), its characterized in that, install motor (2), reduction gear (3), torque sensor (5) on support (1), the output shaft of motor (2) with the input shaft fixed connection of reduction gear (3), the output shaft of reduction gear (3) with the input shaft fixed connection of torque sensor (5), the output shaft fixedly connected with pivot (12) of torque sensor (5), pivot (12) fixed mounting has glass section of thick bamboo (11), glass section of thick bamboo (11) with pivot (12) coaxial line, windscreen wiper adhesive tape pressure equipment adjustment mechanism is installed to support (1), windscreen wiper adhesive tape pressure equipment adjustment mechanism is provided with pressure sensor (8) and windscreen wiper adhesive tape holder (9), the centre gripping of windscreen wiper adhesive tape holder (9) have windscreen wiper adhesive tape (10), the scraping surface of windscreen wiper adhesive tape (10) with the lateral wall opposite direction setting of glass section of thick bamboo (11).
2. 2. A wiper strip friction tester according to claim 1, characterized in that the diameter of the glass cylinder (11) is 600mm.
3. 3. The machine according to claim 1, wherein the rotation speed of the glass cylinder (11) is n, n is 3 rpm-180 rpm.
4. 4. A wiper strip friction tester according to claim 3, characterized in that the glass cylinder (11) rotates at 5rpm when the rotational speed of the automobile rear window wiper strip is 30rpm and the minimum rotational radius of the automobile rear window wiper strip is 100mm, and the glass cylinder (11) rotates at 140rpm when the rotational speed of the automobile front window wiper strip is 70rpm and the maximum rotational radius of the automobile front window wiper strip is 1200 mm.
5. 5. The wiper strip friction force testing machine according to claim 1, wherein the wiper strip press-fit adjusting mechanism is located right above the glass cylinder (11).
6. 6. The wiper strip friction testing machine according to claim 5, wherein the wiper strip press-fitting adjusting mechanism comprises a sliding table cylinder (7), the support (1) is provided with a mounting frame (6), and the sliding table cylinder (7) is mounted on the mounting frame (6).
7. 7. The machine according to claim 6, wherein the bracket (1) is provided with a hot air blower (14), and an air outlet of the hot air blower (14) is arranged towards the glass cylinder (11).
8. 8. A wiper strip friction tester according to claim 7, characterized in that the mounting frame (6) is fitted with an infrared temperature sensor (13).

Description

Wiper rubber strip friction force testing machine Technical Field The utility model relates to the technical field of wiper rubber strips, in particular to a friction force testing machine for wiper rubber strips. Background The conventional wiper rubber strip friction force testing machine generally rubs a wiper rubber strip back and forth on a glass disc. The method comprises the steps of fixing a glass disc, enabling friction force measurement to be easily affected by motion inertia to cause data deviation, fixing the wiper rubber, enabling the glass disc to rotate in a friction mode, and enabling pressure change in actual use to be not dynamically simulated, wherein accuracy of measurement results is insufficient, and the two directly measured friction forces of the wiper rubber are large in error and inaccurate, so that design and installation of the wiper rubber are not facilitated. Disclosure of utility model The utility model provides a wiper rubber strip friction force testing machine which can eliminate inertia interference and improve the accuracy of wiper rubber strip friction force testing. In order to achieve the above purpose, the utility model adopts the following technical scheme: The utility model discloses a wiper rubber strip friction force testing machine which comprises a support, wherein a motor, a speed reducer and a torque sensor are arranged on the support, an output shaft of the motor is fixedly connected with an input shaft of the speed reducer, an output shaft of the speed reducer is fixedly connected with an input shaft of the torque sensor, an output shaft of the torque sensor is fixedly connected with a rotating shaft, a glass cylinder is fixedly arranged on the rotating shaft, the glass cylinder is coaxial with the rotating shaft, a wiper rubber strip press-mounting adjusting mechanism is arranged on the support, a pressure sensor and a wiper rubber strip clamping piece are arranged on the wiper rubber strip press-mounting adjusting mechanism, a wiper rubber strip is clamped on the wiper rubber strip clamping piece, and a scraping surface of the wiper rubber strip is arranged opposite to the outer side wall of the glass cylinder. Further, the diameter of the glass cylinder is 600mm. Further, the rotating speed of the glass cylinder is n, and n is more than or equal to 3rpm and less than or equal to 180rpm. Further, when the rotational speed of the automobile rear window wiper strip is 30rpm, the minimum rotational radius of the automobile rear window wiper strip is 100mm, the rotational speed of the glass cylinder is 5rpm, and when the rotational speed of the automobile front window wiper strip is 70rpm, the maximum rotational radius of the automobile front window wiper strip is 1200mm, the rotational speed of the glass cylinder is 140rpm. Further, the wiper adhesive tape press-fitting adjusting mechanism is located right above the glass cylinder. Further, the wiper adhesive tape press-fitting adjusting mechanism comprises a sliding table cylinder, the bracket is provided with a mounting frame, and the sliding table cylinder is mounted on the mounting frame. Further, the bracket is provided with an air heater, and an air outlet of the air heater is arranged towards the glass cylinder. Further, the mounting frame is provided with an infrared temperature sensor. The beneficial effects of the utility model are as follows: The application relates to a friction force tester for a wiper rubber strip, which is used for testing friction force of the wiper rubber strip, the wiper rubber strip to be tested is clamped and fixed on a wiper rubber strip clamping piece, a scraping surface of the wiper rubber strip faces to the outer surface wall of a glass cylinder, the scraping surface of the wiper rubber strip is not pressed on the outer surface wall of the glass cylinder, a motor is started to work, an output shaft of the motor rotates to drive an input shaft of a speed reducer to rotate, the output shaft of the speed reducer rotates to drive an input shaft of a torque sensor to rotate, the output shaft of the torque sensor rotates to drive a glass cylinder to rotate, the torque sensor detects that the wiper rubber strip is not pressed on the surface wall of the glass cylinder, a motor stops working, the wiper rubber strip is pressed on the surface wall of the glass cylinder by adjusting a wiper rubber strip pressing adjusting mechanism, the moment M 1 of the wiper rubber strip rotating the glass cylinder is not pressed on the surface wall of the glass cylinder, a torque M 2 of the rotating the glass cylinder is started when the wiper rubber strip is pressed on the outer surface wall of the glass cylinder by the torque sensor, a calculated moment difference value d (M) = 2-M1, the friction coefficient R=d/P is measured, the friction coefficient is not measured, the friction coefficient is calculated when the pressure of the rubber strip is pressed on the glass cylinder is not pressed o