Unlock instant, AI-driven research and patent intelligence for your innovation.

Measuring device for detecting negative clearance of automobile hub bearing and identification method

A technology for wheel hub bearings and automobile hubs, which is applied in the direction of measuring devices, testing of mechanical components, testing of machine/structural components, etc., and can solve problems such as poor adaptability, unrealized automation application, and poor automation performance

Pending Publication Date: 2021-02-19
ZHEJIANG ZHAOFENG MECHANICAL & ELECTRONICS CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example measuring device: a wheel bearing negative clearance detection method (CN 110793487A), a wheel hub bearing negative clearance detection method (CN 105588494A) The above measuring devices all utilize the method of loading and testing the displacement of the wheel hub bearing to obtain the bearing negative clearance , the test method is cumbersome and the test efficiency is low
For example measuring device: wheel hub bearing negative clearance detection method and detection equipment (CN 10412208 A), wheel hub bearing negative clearance detection equipment (CN 204008143 U), a contact type online detection device for wheel hub bearing axial negative clearance (CN107655396 A) A method for detecting axial negative clearance of hub bearings (CN 109931901 A) The above measuring devices all use the principle of modal testing and calculate the negative clearance value of the bearing through formulas, but most of the steps need to be manually operated, which is not easy Realize automation, but at the same time, there are problems such as high natural frequency of automobile hub bearings, and it is difficult to select and match vibration devices, so automation applications have not yet been realized
In summary, there are still the following problems in the negative clearance measuring device of automobile wheel hub bearings: (1) most of the measuring steps require manual intervention, and the automation performance is poor
(2) Isolation measures are not adopted, such as the vibration of the fixture is transmitted to the tested bearing
(3) Fixtures need to be replaced when changing the inner diameter of the tested bearing, which has poor adaptability
(4) The influence of the quality error of the tested bearing on the measurement results is not excluded

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Measuring device for detecting negative clearance of automobile hub bearing and identification method
  • Measuring device for detecting negative clearance of automobile hub bearing and identification method
  • Measuring device for detecting negative clearance of automobile hub bearing and identification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The measuring device for detecting the negative clearance of automobile hub bearings includes a bracket 11, a control system and a conveying device 12 for transporting hub bearings. The bracket 11 is a bracket made of aluminum profiles, and the conveying device 12 adopts a belt conveyor. Requirements The transmission is smooth and responsive, and it is used to transport the tested automobile wheel bearings to the test position smoothly and accurately. A clamping device 13 and a position sensor 14 are installed on the side of the bracket 11. The position sensor 14 preferably adopts an infrared type. The position sensor 14 detects the position of the automobile wheel bearing. When the automobile wheel bearing reaches the detection position by the conveying device 12, the position sensor 14 The signal is input into the control system, and the control system controls the clamping device 13 to clamp and fix the automobile wheel bearing, lifts the automobile wheel bearing and ...

Embodiment 2

[0056] Embodiment 2 has basically the same features as Embodiment 1, except that a mounting hole is provided at the joint between the connecting piece 152 and the first electric push rod 151, and the pin shaft 154 is installed in the mounting hole and the connecting piece 152 is connected to the first electric push rod. 151, a gap is provided between the pin shaft 154 and the mounting hole. The gap effect is to release the degree of freedom of the combination of the counterweight 153 and the hub bearing under test in the horizontal direction during the test, so as to reduce the interference to the test results.

Embodiment 3

[0058] An identification method using the measuring device in Embodiment 1 or 2. The conveying device 12 conveys the hub bearing directly below the counterweight device 15. When the position sensor 14 detects that the hub bearing reaches the set position, the control system stops conveying Device 12, start the clamping device 13, the clamping device 13 clamps and lifts the hub bearing away from the conveying device 12, the counterweight device 15 counterweights the hub bearing, and the vibration excitation device 17 applies a sine wave with constant amplitude to the inner ring of the hub bearing Excitation, when the excitation frequency is the same as the resonance frequency of the hub bearing and counterweight device 15, the response amplitude of the inner ring of the hub bearing increases sharply, and the measured frequency is the natural frequency f of the hub bearing and counterweight device 15 0 ;

[0059] The stiffness calculated from the obtained natural frequency is: ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of hub bearing detection, and discloses a measuring device for detecting the negative clearance of an automobile hub bearing and an identification method, and the device comprises a support, a control system, and a conveying device. A clamping device and a position sensor are installed on the side edge of the support, a balance weight device is installed on the support, the position sensor is used for detecting the position of a hub bearing on the conveying device and sending position information to the control system, the control system controls the clampingdevice to clamp and lift the hub bearing, and the balance weight device used for balancing the weight of the hub bearing is installed at the upper end of the support. The two sides of the support areprovided with a vibration testing device and a vibration excitation device which are used for detecting the hub bearing respectively. The automobile hub bearing is clamped and fixed through the clamping device, and the automobile hub bearing is supported to be separated from the conveying device, so that the excitation device carries out excitation on the automobile hub bearing conveniently. Meanwhile, the automobile hub bearing is weighted through the counterweight device, the difference of the inherent frequency of the system caused by the mass deviation of the hub bearing is reduced, and the test precision is improved.

Description

technical field [0001] The invention relates to the field of detection of wheel hub bearings, in particular to a measuring device and identification method for detecting the negative clearance of automobile wheel hub bearings. Background technique [0002] Hub bearings are the key parts connecting the tire hub and the car shaft, which can carry radial load (vehicle weight) and axial load (lateral force or lateral impact force of the tire when turning), and reduce the friction of the rotating pair at the same time. force and transmit torque. The third-generation wheel hub bearing unit widely used at present, compared with the previous two generations of bearing units, except that the structure is very different, the inner flange is fixed on the wheel rim, and the outer flange and the outer ring of the bearing are fixed as a whole. Bolted to the steering knuckle. Another obvious improvement is the introduction of negative clearance technology. Negative clearance can increase...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/16G01M13/045
CPCG01B21/16G01M13/045
Inventor 温保岗雷良育孔辰寰方志启刘杨阳
Owner ZHEJIANG ZHAOFENG MECHANICAL & ELECTRONICS CO LTD