CN-224231246-U - Dynamic equipment calibration tool

CN224231246UCN 224231246 UCN224231246 UCN 224231246UCN-224231246-U

Abstract

The utility model relates to a dynamic equipment calibration tool which comprises a base, a detection rod and two groups of detection springs. The base is fixed on the equipment and is in threaded connection with the detection rod, and the first detection spring and the second detection spring are sleeved on the periphery of the detection rod and respectively abutted against the upper end and the lower end of the base. The base consists of an upper cover, a lower cover, a left fan-shaped shell and a right fan-shaped shell, wherein an installation cavity is arranged in the upper cover, a guide pipe and an internal threaded hole are arranged on the upper cover to guide the detection rod to axially move, a limit groove fixing spring is arranged on the upper end face and the lower end face of the detection rod, a hexagonal connecting seat and an adjustable upper limit piece are arranged at the upper end of the detection rod, a lower limit piece is arranged at the lower end of the detection rod, and the rigidity of the spring is adjusted through a stop nut. Force displacement data are synchronously collected based on linear deformation (F=kD) of the spring, the accuracy of the sensor is verified by comparing with preset parameters, and the spring stiffness is adjusted to achieve dynamic calibration.

Inventors

WANG LIJUN
YU CE
WU YULIANG

Assignees

浙江亚之星汽车部件有限公司

Dates

Publication Date: 20260512
Application Date: 20250519

Claims (9)

1. A dynamic equipment calibration tool is characterized by comprising a base fixedly installed on equipment, wherein a detection rod is connected to the base in a threaded mode, two groups of first detection springs and second detection springs which are sequentially arranged along the axial direction of the detection rod are sleeved on the periphery of the detection rod, one end of each first detection spring is in abutting connection with the base, the other end of each first detection spring is in abutting connection with the upper end of the detection rod, one end of each second detection spring is in abutting connection with the base, and the other end of each second detection spring is in abutting connection with the detection rod.
2. The dynamic equipment calibration fixture of claim 1, wherein a first internal threaded hole is formed above the base, an external thread in threaded connection with the first internal threaded hole is formed on the outer peripheral surface of the detection rod, and an installation cavity for accommodating a second detection spring is hollow in the base.
3. The dynamic equipment calibration fixture of claim 2, wherein the base comprises an upper cover and a lower connecting seat which are oppositely arranged up and down, two groups of left fan-shaped shells and right fan-shaped shells which are symmetrically arranged left and right are arranged between the upper cover and the lower connecting seat, the upper end of the left fan-shaped shell is fixedly connected with the upper cover, the lower end of the left fan-shaped shell is fixedly connected with the lower connecting seat, the upper end of the right fan-shaped shell is fixedly connected with the upper cover, the lower end of the right fan-shaped shell is fixedly connected with the right connecting seat, the accommodating cavity is distributed between the left fan-shaped shell and the right fan-shaped shell, and a main mounting hole is formed in the middle of the lower connecting seat.
4. The dynamic equipment calibration fixture of claim 3, wherein a first guide tube is arranged in the middle of the upper cover, two ends of the first guide tube face to two sides of the upper cover respectively and extend along the axial direction of the detection rod, and the first internal threaded holes are distributed in the first guide tube.
5. The dynamic equipment calibration fixture of claim 4, wherein the upper end face of the upper cover is provided with a first limit groove, the lower end of the first detection spring is inserted into the first limit groove, the lower end face of the upper cover is provided with a second limit groove, and the upper end of the second detection spring is inserted into the second limit groove.
6. The dynamic equipment calibration fixture of claim 3, wherein a viewing window for observing the expansion and contraction variation of the second detection spring is arranged between the side edge of the left fan-shaped shell and the side edge of the right fan-shaped shell.
7. The dynamic equipment calibration fixture according to any one of claims 1 to 6, wherein an upper connecting seat is arranged at the upper end of the detection rod, a connecting hole connected with the upper end of the detection rod is arranged at the lower end of the upper connecting seat, a stud used for being linked with equipment is arranged at the upper end of the upper connecting seat, and the outer peripheral surface of the upper connecting seat is hexagonal.
8. The dynamic equipment calibration fixture of any one of claims 2 to 6, wherein an upper limiting part is further arranged at the upper end of the detection rod, the upper limiting part comprises a second guide pipe and an upper limiting flange ring which surrounds the periphery of the second guide pipe and is used for limiting the upper end of the first detection spring, a second internal threaded hole which is in external threaded connection with the detection rod is formed in the second guide pipe, and a first stop nut which is connected with the detection rod is arranged above the upper limiting part.
9. The dynamic equipment calibration fixture according to any one of claims 2 to 6, wherein a lower limiting part is arranged at the lower end of the detection rod, the lower limiting part comprises a third guide pipe and a lower limiting flange ring which surrounds the periphery of the third guide pipe and is used for limiting the lower end of the second detection spring, a third internal threaded hole which is in external threaded connection with the detection rod is arranged in the third guide pipe, and a second stop nut which is connected with the detection rod is arranged above the lower limiting part.

Description

Dynamic equipment calibration tool Technical Field The utility model particularly relates to a dynamic equipment calibration tool. Background Currently, in performance evaluation of dynamic load equipment such as a shock absorber, a dynamic calibration technology is highly dependent on precision test equipment such as a vibrating table and a high-speed displacement standard. Although the equipment can realize high-precision calibration, the equipment has the problems of high cost, complex operation and the like, and is difficult to apply on a large scale especially for small and medium-sized shock absorber manufacturers. In addition, under the dynamic working condition, the load sensor of the shock absorber is easy to cause reference deviation due to high-frequency vibration, so that the calibration result is distorted, the sensor is required to be repeatedly disassembled for manual calibration in the traditional calibration method, the efficiency is low, and long-term stability is difficult to ensure. Disclosure of utility model Aiming at the defects of the prior art, the technical problem to be solved by the utility model is to provide the dynamic equipment calibration tool which has a compact structure, does not need a complex hydraulic or pneumatic system and reduces the cost. Meanwhile, the reusability of the spring reduces the requirement for calibrating consumable materials. The dynamic equipment calibration tool is characterized by comprising a base fixedly arranged on equipment, wherein the base is in threaded connection with a detection rod, two groups of first detection springs and second detection springs which are sequentially arranged along the axial direction of the detection rod are sleeved on the periphery of the detection rod, one end of each first detection spring is in abutting connection with the base, the other end of each first detection spring is in abutting connection with the upper end of the detection rod, and one end of each second detection spring is in abutting connection with the base, and the other end of each second detection spring is in abutting connection with the detection rod. By adopting the technical scheme, the base is fixedly arranged on the test bed equipment, the upper part of the detection rod is linked with the test bed equipment, the test bed equipment drives the detection rod to rotate, the detection rod and the base are in a threaded connection mode, so that the detection rod can also axially move along the detection rod, the first detection spring is compressed (or stretched) and the second detection spring is stretched (or compressed) to form bidirectional dynamic load, the first detection spring and the second detection spring adopt rigid springs (such as alloy steel springs), the linear relation of force-displacement in the elastic limit (F=kD) is adopted, multiple groups of data are acquired through reciprocating motion, the telescopic force values (load sensors (to be calibrated) of the two springs are synchronously acquired, the data of displacement (displacement sensors are arranged on the shock absorber test bed equipment), the preset linear parameters (k values) and the output values of the load sensors of the springs are compared, the accuracy of the equipment is verified, whether the load sensors deviate or not is judged through the comparison data, and if the deviation occurs, the load sensor parameters are automatically corrected by an external control system. In summary, the dynamic equipment calibration tool provided by the application simulates dynamic load through spring deformation, abandons a complex hydraulic system, reduces hardware investment, and can complete calibration only by collecting linear data by a person. Meanwhile, based on the linear characteristic of the spring, the calibration process directly verifies the synchronism of the load sensor and the displacement sensor, and the offset error caused by vibration is reduced. The dynamic equipment calibration tool can be further arranged that a first internal threaded hole is formed above the base, external threads in threaded connection with the first internal threaded hole are formed on the outer peripheral surface of the detection rod, and the inside of the base is hollow and forms a mounting cavity for accommodating the second detection spring. By adopting the technical scheme, when the detection rod rotates, the external thread is meshed with the first internal thread hole above the base to convert rotary motion into axial linear motion (namely, a thread pair transmission principle), so that the detection rod is lifted, and then the first detection spring is compressed (or stretched), and the second detection spring is stretched (or compressed), so that bidirectional dynamic load is formed. The dynamic equipment calibration tool can be further arranged that the base comprises an upper cover and a lower connecting seat which are arranged in an up-down opposite mode, two groups