CN215373925U

CN215373925U - Coaxiality detection system of dynamic detection device

Info

Publication number: CN215373925U
Application number: CN202122151324.3U
Authority: CN
Inventors: 范海艇; 夏冰玉; 乐秀伟; 王振; 韩晓萌; 尹思博
Original assignee: Shanghai Institute of Quality Inspection and Technical Research
Current assignee: Shanghai Institute of Quality Inspection and Technical Research
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2021-12-31
Anticipated expiration: 2031-09-07

Abstract

The utility model provides a coaxiality detection system of a dynamic detection device, which comprises two elastic bodies, strain gauges, a sleeve, a spring support, a signal acquisition amplifier and an upper computer, wherein one elastic body is fixedly connected with an output shaft of the dynamic detection device, the other elastic body is fixedly connected with a fixed shaft of the dynamic detection device, the two elastic bodies are connected through the sleeve, the bottom of the sleeve is supported by the spring support, the elastic bodies can freely move in the sleeve, the signal acquisition amplifier is electrically connected with the strain gauges, and the signal acquisition amplifier is in communication connection with the upper computer; the utility model has simple structure, high sensitivity, good reliability, convenient installation and convenient carrying, and can be used in various occasions such as laboratories or fields; by adopting a disconnected structure, the influence of the axial additional force value on the detection result can be effectively avoided, and the precision of the detection result is improved.

Description

Coaxiality detection system of dynamic detection device

Technical Field

The utility model relates to the technical field of detection devices, in particular to a coaxiality detection system of a dynamic detection device.

Background

Back-to-back sine comparison method force sensor dynamic detection device can realize the testing arrangement of multi-parameter output such as power value, displacement, impact, vibration, can be used to carry out fatigue test to key part, new material etc. at present, the axiality adopts single metal rod to detect usually, and the metal rod with device fixed connection can receive the extra power value of introducing when installing to change self state, influence measuring result.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a coaxiality detection system of a dynamic detection device, which avoids the influence of an axial additional force value on a detection result and improves the precision of the detection result.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

the utility model provides a dynamic detection device axiality detecting system, its characterized in that, includes elastomer, foil gage, sleeve and spring bracket, signal acquisition amplifier and host computer, the figure of elastomer is two, an elastomer and dynamic detection device's output shaft fixed connection, another elastomer and dynamic detection device's fixed axle fixed connection, through muffjoint between two elastomers, telescopic bottom is supported by spring bracket, the elastomer can freely move in the sleeve, signal acquisition amplifier and foil gage electrical connection, signal acquisition amplifier and host computer communication connection.

Further, one side of elastomer is the cylinder structure, a plurality of notches have been seted up to one side of elastomer, the central authorities of elastomer are along vertical being equipped with thin axle, the diameter of thin axle is less than 1/3 of cylinder diameter, be equipped with convex transition face between thin axle and the cylinder.

Furthermore, four strain gauges are respectively attached to transition surfaces at two ends of the thin shaft.

Furthermore, the other end of the elastic body is provided with a positioning boss, and the positioning boss is matched with the positioning holes in the output shaft and the fixing shaft.

Furthermore, the sleeve is a hollow cylinder, four strain gauges are symmetrically attached to the upper portion and the lower portion of the outer wall of the sleeve respectively, and an air hole is formed in the middle of the sleeve.

Furthermore, the two elastic bodies are fixedly connected with the output shaft and the fixed shaft of the dynamic detection device through screws.

Furthermore, the diameter of the bottom of the spring support is larger than that of the top of the spring support, the bottom of the spring support is a plane, and the top of the spring support is a semicircular convex surface.

The utility model has simple structure, high sensitivity, good reliability, convenient installation and convenient carrying, and can be used in various occasions such as laboratories or fields; by adopting a disconnected structure, the influence of the axial additional force value on the detection result can be effectively avoided, and the precision of the detection result is improved.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

FIG. 2 is a schematic mechanical diagram of the present invention;

FIG. 3 is a schematic structural view of an elastomer of the present invention;

FIG. 4 is another schematic structural view of the elastomer of the present invention;

FIG. 5 is a schematic view of the spring support of the present invention;

fig. 6 is another structural schematic diagram of the spring support of the present invention.

Reference numerals:

1 output shaft, 2 elastic bodies, 3 strain gauges, 4 sleeves, 5 spring supports,

6 fixed axle, 7 signal acquisition amplifier, 8 host computers.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model discloses a coaxiality detection system of a dynamic detection device, which comprises two elastic bodies 2, a strain gauge 3, a sleeve 4, a spring support 5, a signal acquisition amplifier 7 and an upper computer 8, wherein the number of the elastic bodies 2 is two, one elastic body 2 is fixedly connected with an output shaft 1 of the dynamic detection device, the other elastic body 2 is fixedly connected with a fixed shaft 6 of the dynamic detection device, and the two elastic bodies 2 are fixedly connected with the output shaft 1 and the fixed shaft 6 of the dynamic detection device through screws.

Connect through sleeve 4 between two elastomer 2, the bottom of sleeve 4 is supported by spring bracket 5, and elastomer 2 can freely move in sleeve 4, and sleeve 4 is hollow cylinder, and four foil gage 3 are respectively pasted to the upper portion and the lower part symmetry of 4 outer walls of sleeve, and the middle part of sleeve 4 is equipped with the gas pocket, and the hole is used for the inside ventilation of sleeve 4, prevents that the air in the inside airtight environment of sleeve 4 from producing additional force value when elastomer 2 up-and-down motion.

As shown in fig. 3 and 4, one side of the elastic body 2 is of a cylindrical structure, a plurality of notches are formed in the cylindrical structure, lubricating grease is filled in the notches, a thin shaft is vertically arranged in the center of the elastic body 2, the diameter of the thin shaft is smaller than 1/3 of the diameter of the cylinder, a circular arc-shaped transition surface is arranged between the thin shaft and the cylinder, four strain gauges 3 are respectively attached to the transition surfaces at two ends of the thin shaft, and a positioning boss is arranged at the other end of the elastic body 2 and matched with positioning holes in the output shaft 1 and the fixing shaft 6.

As shown in fig. 5 and 6, the diameter of the bottom of the spring support 5 is larger than the diameter of the top of the spring support 5, the bottom of the spring support 5 is a plane, the spring support 5 can be stably placed on the elastic body 2, the top of the spring support 5 is a semicircular convex surface, the contact area of the spring support and the elastic body is reduced while the semicircular convex surface provides support for the sleeve 4, the measurement error caused by friction is reduced, the self weight of the sleeve 4 can be offset by the spring support 5, and the micro deformation of the elastic body 2 and the micro change of the pose of the sleeve 4 are not affected.

The signal acquisition amplifier 7 is electrically connected with the strain gauge 3, and the signal acquisition amplifier 7 is in communication connection with the upper computer 8.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a dynamic detection device axiality detecting system, its characterized in that, includes elastomer, foil gage, sleeve and spring bracket, signal acquisition amplifier and host computer, the figure of elastomer is two, an elastomer and dynamic detection device's output shaft fixed connection, another elastomer and dynamic detection device's fixed axle fixed connection, through muffjoint between two elastomers, telescopic bottom is supported by spring bracket, the elastomer can freely move in the sleeve, signal acquisition amplifier and foil gage electrical connection, signal acquisition amplifier and host computer communication connection.

2. The coaxiality detection system of the dynamic detection device according to claim 1, wherein one side of the elastic body is of a cylindrical structure, a plurality of notches are formed in one side of the elastic body, a thin shaft is vertically arranged in the center of the elastic body, the diameter of the thin shaft is smaller than 1/3 of the diameter of the cylinder, and an arc-shaped transition surface is arranged between the thin shaft and the cylinder.

3. The coaxiality detection system according to claim 2, wherein four strain gauges are attached to transition surfaces at two ends of the thin shaft respectively.

4. The system of claim 2, wherein the other end of the elastic body is provided with a positioning boss, and the positioning boss is engaged with the positioning holes of the output shaft and the fixing shaft.

5. The coaxiality detection system of a dynamic detection device according to claim 1, wherein the sleeve is a hollow cylinder, four strain gauges are symmetrically attached to the upper portion and the lower portion of the outer wall of the sleeve respectively, and an air hole is formed in the middle of the sleeve.

6. The system of claim 1, wherein the two elastic bodies are fixedly connected to the output shaft and the fixed shaft of the dynamic testing device by screws.

7. The system of claim 1, wherein the diameter of the bottom of the spring support is larger than the diameter of the top of the spring support, the bottom of the spring support is a flat surface, and the top of the spring support is a semi-circular convex surface.