CN217304738U

CN217304738U - Pressure cycle fatigue test device

Info

Publication number: CN217304738U
Application number: CN202123268760.5U
Authority: CN
Inventors: 童忠春; 赖宏斌; 张月娇
Original assignee: ORAL SUBSIDIARY SUN YAT-SEN UNIVERSITY HOSPITAL
Current assignee: ORAL SUBSIDIARY SUN YAT-SEN UNIVERSITY HOSPITAL
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-08-26
Anticipated expiration: 2031-12-23

Abstract

The utility model provides a pressure cycle fatigue test device, the on-line screen storage device comprises a base, the location structure, pressure sensor, drive assembly, depression bar and control assembly, the location structure sets up in the base, the location structure is used for fixing the work piece that is tested, pressure sensor sets up in the location structure, pressure sensor is used for detecting the pressure that the work piece that is tested receives, drive assembly assembles in the base, the depression bar is connected in drive assembly, the one end of depression bar is just for being used for fixing the work piece department that is tested of location structure, drive assembly can drive the depression bar towards the direction removal that is close to or keeps away from the location structure, the control assembly electricity is connected in pressure sensor and drive assembly; the control assembly is used for controlling the driving action of the driving assembly according to the pressure signal detected by the pressure sensor, so that the pressure rod can pressurize the tested workpiece in a reciprocating manner within a preset range of pressure. The compression resistance and fatigue test of the false tooth can be conveniently and accurately carried out.

Description

Pressure cycle fatigue test device

Technical Field

The utility model belongs to the technical field of the quality testing, especially, relate to a pressure cycle fatigue test device.

Background

Teeth are the hardest organs of the human body, and have the functions of keeping the facial appearance, assisting pronunciation and the like besides the functions of incising and biting, chewing and the like. The teeth of a person are germinated twice in a lifetime, the first eruption is called as the deciduous teeth, the teeth grow completely from 6 months to about 3 years of age after birth, and the deciduous teeth begin to fall off at 6-7 years of age; the permanent tooth is usually installed in the related technology, so that the normal life of people is not affected when the permanent tooth is damaged or pulled out, namely the false tooth is commonly called as a medical appliance commonly used in modern society.

The denture is repeatedly subjected to chewing pressure with certain frequency and the influence of the intraoral environment and temperature which are constantly changed due to eating during chewing, the denture can be damaged or fall off due to fatigue and the change of the intraoral environment and temperature after the chewing process, in order to simulate the use condition of the denture in the oral cavity, detect the service life of the denture and detect the influence of the repeated chewing pressure, environment and temperature in the oral cavity on the strength of the denture, related equipment is often required to carry out chewing simulation experiments of the denture, namely compression resistance and fatigue tests of the denture in-vitro researches related to the denture, however, the testing equipment in the related technology cannot conveniently and accurately carry out the compression resistance and fatigue tests of the denture.

SUMMERY OF THE UTILITY MODEL

A technical object of the utility model is to provide a pressure cycle fatigue test device can conveniently accurately carry out the resistance to compression and the fatigue test of artificial tooth.

In order to solve the technical problem, the present invention provides a pressure cycle fatigue test apparatus, including a base, a positioning structure, a pressure sensor, a driving component, a pressure rod and a control component, wherein the positioning structure is disposed on the base, the positioning structure is used for fixing a tested workpiece, the pressure sensor is disposed on the positioning structure, the pressure sensor is used for detecting the pressure applied to the tested workpiece, the driving component is assembled on the base, the pressure rod is connected to the driving component, one end of the pressure rod is opposite to the positioning structure for fixing the tested workpiece, the driving component can drive the pressure rod to move towards the direction close to or away from the positioning structure, and the control component is electrically connected to the pressure sensor and the driving component; the control assembly is used for controlling the driving action of the driving assembly according to the pressure signal detected by the pressure sensor, so that the pressure rod can extrude the tested workpiece in a reciprocating manner under the pressure of a preset range.

Furthermore, the positioning structure comprises a fixing seat and a positioning seat, the fixing seat is fixedly assembled on the base, the pressure sensor is fixed on the side of the fixing seat far away from the base, the positioning seat is fixedly assembled on the side of the pressure sensor far away from the fixing seat, and a positioning groove for fixing the tested workpiece is formed in the side of the positioning seat far away from the pressure sensor.

Furthermore, the periphery of the positioning seat is provided with a circulating through hole communicated with the positioning groove, the pressure cycle fatigue test device further comprises a constant temperature water tank fixed on the base, the constant temperature water tank is connected with the circulating through hole through a pipeline, and water in the constant temperature water tank can flow through the positioning groove.

Further, the drive assembly comprises an assembly seat fixed on the base, a sliding block assembled on the assembly seat in a sliding mode, and a drive source fixed on the assembly seat and connected with the sliding block, the pressing rod is fixedly connected to the sliding block, and the drive source is used for driving the sliding block to move towards or away from the base.

Furthermore, a first slide rail is fixed on the assembly seat, a second slide rail is fixed on the sliding block, and the first slide rail and the second slide rail are assembled in a sliding manner; the drive assembly is characterized in that the drive assembly further comprises a lead screw which is rotatably connected with the assembly seat, the slide block is in threaded assembly with the lead screw, the drive source adopts a servo motor, the output end of the servo motor is connected with the lead screw, and the servo motor is used for driving the lead screw to rotate.

Furthermore, the base is fixed with a mounting block protruding from the surface of the base, and the assembling seat is fixedly assembled on the side, far away from the base, of the mounting block.

Further, the control assembly comprises a power supply, a controller, a servo driver and a digital-to-analog converter, the controller is electrically connected to the power supply, the servo driver is electrically connected to the controller and the driving source, and the digital-to-analog converter is electrically connected to the pressure sensor and the controller.

Further, the control assembly further comprises a sensing signal amplifier electrically connected in front of the pressure sensor and the digital-to-analog converter.

Further, the pressure cycle fatigue test device further comprises a shell fixed on the base, the shell extends from the base to the side, far away from the base, of the driving assembly, the controller, the servo driver and the digital-to-analog converter are installed in the shell, the control assembly further comprises a touch control screen fixed on the shell, far away from the side of the base, the touch control screen is electrically connected to the controller, the touch control screen is used for displaying the current test condition of the tested denture, and the touch control screen is used for inputting a control instruction to the controller.

Further, the predetermined range is 10-500N.

Compared with the prior art, the utility model, well pressure cycle fatigue test device, beneficial effect lies in:

when need carry out pressure test to the artificial tooth, fix the artificial tooth on location structure earlier, then can control drive assembly drive depression bar through control assembly and remove, make the depression bar support and press on the artificial tooth, pressure sensor can detect the pressure that the artificial tooth received, then give control assembly with pressure signal transmission, when control assembly judges the artificial tooth according to pressure signal and receives the pressure in the predetermined range, control assembly control drive assembly drives the depression bar and does the reciprocating motion of little distance, thereby realize the repeated cycle pressurization test to being tested the artificial tooth, can conveniently accurately imitate artificial tooth at intraoral pressurized frequency and pressurized strength, thereby carry out the resistance to compression and the fatigue test of artificial tooth.

Drawings

Fig. 1 is a schematic three-dimensional exploded structure diagram of a pressure cycle fatigue test device in an embodiment of the present invention.

In the drawings, each reference numeral denotes: 1. a base; 11. mounting blocks; 2. a positioning structure; 21. a fixed seat; 22. positioning seats; 3. a pressure sensor; 4. a drive assembly; 41. assembling a seat; 42. a slider; 43. a drive source; 44. a lead screw; 5. a pressure lever; 6. a control component; 61. a power source; 62. a controller; 63. a servo driver; 64. a digital-to-analog converter; 65. a sense signal amplifier; 7. a housing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example (b):

in this embodiment, with reference to fig. 1, a pressure cycle fatigue test apparatus is provided, which includes a base 1, a positioning structure 2, a pressure sensor 3, a driving component 4, a pressure lever 5 and a control component 6, where the positioning structure 2 is disposed on the base 1, the positioning structure 2 is used to fix a tested workpiece, the pressure sensor 3 is disposed on the positioning structure 2, the pressure sensor 3 is used to detect a pressure applied to the tested workpiece, the driving component 4 is assembled on the base 1, the pressure lever 5 is connected to the driving component 4, one end of the pressure lever 5 is opposite to the position of the positioning structure 2, where the tested workpiece is fixed, the driving component 4 can drive the pressure lever 5 to move toward a direction close to or away from the positioning structure 2, and the control component 6 is electrically connected to the pressure sensor 3 and the driving component 4; the control assembly 6 is used for controlling the driving action of the driving assembly 4 according to the pressure signal detected by the pressure sensor 3, so that the pressure rod 5 can pressurize the tested workpiece in a reciprocating way with the pressure in a preset range.

When the pressure test is needed to be carried out on the false tooth, the false tooth is firstly fixed on the positioning structure 2, then the driving component 4 can be controlled by the control component 6 to drive the pressing rod 5 to move, so that the pressing rod 5 is pressed on the false tooth, the pressure sensor 3 can detect the pressure on the false tooth, then the pressure signal is transmitted to the control component 6, when the control component 6 judges that the false tooth receives the pressure in the preset range according to the pressure signal, the control component 6 controls the driving component 4 to drive the pressing rod 5 to do reciprocating movement in a small distance, thereby realizing the repeated cyclic pressurization test on the tested false tooth, and conveniently and accurately carrying out the compression resistance and fatigue test on the false tooth.

Location structure 2 includes fixing base 21 and positioning seat 22, and fixing base 21 fixed mounting is in base 1, and pressure sensor 3 is fixed in keeping away from base 1 side of fixing base 21, and positioning seat 22 fixed mounting is in keeping away from fixing base 21 side of pressure sensor 3, and 3 sides of keeping away from of positioning seat 22 pressure sensor open and are equipped with the constant head tank that is used for fixed tested workpiece. Specifically, fixing base 21 keep away from 1 side of base and open and be equipped with the mounting groove, and pressure sensor 3 inlays and fixes in the mounting groove, and positioning seat 22 is fixed to be assembled on pressure sensor 3, has the interval between positioning seat 22 and the fixing base 21, consequently, after the artificial tooth is fixed to the constant head tank, can conduct pressure for pressure sensor 3 through positioning seat 22 when depression bar 5 supports and presses the artificial tooth to realize pressure sensor 3 and to the detection of the pressure that the artificial tooth received.

The circumference of the positioning seat 22 is provided with a circulation through hole communicated with the positioning groove, the pressure circulation fatigue test device further comprises a constant temperature water tank (not shown) fixed on the base 1, the constant temperature water tank is connected with the circulation through hole through a pipeline, and water in the constant temperature water tank can flow through the positioning groove. Specifically, circulating water can be stored in the constant-temperature water tank, a heating device and a temperature sensor can be arranged in the constant-temperature water tank, the heating device can be an electric heating wire, the heating device and the temperature sensor can be electrically connected to the control assembly 6, the control assembly 6 can control the heating action of the heating device according to a temperature signal detected by the temperature sensor, so that water in the constant-temperature water tank is kept in a preset temperature range, for example, 30-45 ℃, the preset temperature range can be adaptively adjusted, the water in the constant-temperature water tank can be conveyed to the positioning groove of the positioning seat 22 through structures such as a water pump and the like to circulate, the false tooth is kept in the preset temperature range, and a pressure circulation fatigue test of the tested false tooth in the corresponding temperature range is realized.

The driving assembly 4 comprises an assembly seat 41 fixed on the base 1, a sliding block 42 slidably assembled on the assembly seat 41, and a driving source 43 fixed on the assembly seat 41 and connected with the sliding block 42, the pressing rod 5 is fixedly connected to the sliding block 42, and the driving source 43 is used for driving the sliding block 42 to move towards a direction close to or far away from the base 1; a first slide rail is fixed on the assembling seat 41, a second slide rail is fixed on the sliding block 42, and the first slide rail and the second slide rail are assembled in a sliding manner; the driving assembly 4 further comprises a lead screw 44 rotatably connected to the assembling base 41, the slider 42 is assembled on the lead screw 44 in a threaded manner, the driving source 43 adopts a servo motor, the output end of the servo motor is connected to the lead screw 44, and the servo motor is used for driving the lead screw 44 to rotate; the base 1 is fixed with a mounting block 11 protruding from the surface thereof, and the mounting seat 41 is fixedly mounted on the side of the mounting block 11 away from the base 1. Specifically, the driving assembly 4, the pressure lever 5, the positioning structure 2 and the pressure sensor 3 form a set of test units, in this embodiment, the pressure cycle fatigue test apparatus includes three sets of test units in total, and the three sets of test units have the same structure, the test of three false teeth can be simultaneously realized through the three sets of test units, the test efficiency is higher, the mounting block 11 is provided with two parallel mounting blocks, the mounting seat 41 of each test unit is fixedly mounted on the two mounting blocks 11 through screws, the connection stability can be improved, the mounting seat 41 is fixedly provided with two parallel first slide rails, the slider 42 is fixedly provided with two parallel second slide rails, the extending directions of the first slide rails and the second slide rails are perpendicular to the top surface of the base 1, the two first slide rails are respectively slidably mounted with the two second slide rails, the lead screw 44 is located at the middle position between the two first slide rails, the length direction of the lead screw 44 is parallel to the extending direction of the first slide rails, the slider 42 is assembled on the screw rod 44 in a threaded manner, the slider 42 can move more stably and reliably through the assembly of the first slide rail and the second slide rail, and through the threaded connection between the screw rod and the slider 42, in the process that the driving source 43 drives the slider 42 to move, sufficient pressure can be provided for the pressure rod 5, so that the pressure within a corresponding pressure range is realized, and different test requirements are met, wherein in the embodiment, the preset range of the test pressure is 10-500N. In some embodiments, the test units may also be arranged in one group, two groups, four groups, five groups, six groups, and so on, and may be adjusted according to actual needs.

In this embodiment, the control assembly 6 includes a power source 61, a controller 62, a servo driver 63 and a digital-to-analog converter 64, the controller 62 is electrically connected to the power source 61, the servo driver 63 is electrically connected to the controller 62 and the driving source 43, the digital-to-analog converter 64 is electrically connected to the pressure sensor 3 and the controller 62, the control assembly 6 further includes a sensing signal amplifier 65 electrically connected to the pressure sensor 3 and the digital-to-analog converter 64, the pressure cycle fatigue test apparatus further includes a housing 7 fixed to the base 1, the housing 7 extends from the base 1 to a side of the driving assembly 4 away from the base 1, the controller 62, the servo driver 63 and the digital-to-analog converter 64 are installed in the housing 7, the control assembly 6 further includes a touch control panel (not shown) fixed to the side of the housing 7 away from the base 1, the touch control panel controller 62 is electrically connected to the touch control panel, the touch control panel is used for displaying a current test condition of the tested denture, the touch control screen is used to input control instructions to the controller 62.

Specifically, taking the view angle of the drawing as an example, the power supply 61 is arranged on the left side of the accommodating cavity of the housing 7, the controller 62 adopts a PLC, the controller 62 is located on the right side of the power supply 61, the servo driver 63 is three and is electrically connected with three servo motors, the digital-to-analog converter 64 is three and is electrically connected with three pressure sensors 3, the digital-to-analog converter 64 is arranged on the rear side of the accommodating cavity, the sensing signal amplifier 65 is arranged on the right side of the controller 62, the outer side of the housing 7 is provided with an inclined plane, the touch control screen is arranged on the inclined plane, and the inclined plane can also be provided with an emergency stop button, a power supply 61 switch and the like.

In the working process, the signal of the pressure sensor 3 can be amplified by the sensing signal amplifier 65, then converted into a digital signal by the digital-to-analog converter 64 and transmitted to the controller 62, the controller 62 obtains the pressure on the workpiece to be tested at present according to the received signal, so that the corresponding servo motor is controlled by the servo driver 63 to make corresponding driving action, the pressure lever 5 continues to move downwards to increase the pressure on the false tooth, or the screw rod 44 is driven to rotate back and forth, the pressure lever 5 moves up and down in a small range to realize the reciprocating extrusion on the false tooth, the touch control screen can display the current test times, the test pressure and the like of each group of test units, so that the corresponding test results can be displayed intuitively, in addition, the touch control screen can also display a control button, and the start and stop of the test action can be controlled by triggering the control button, adjust corresponding test parameters, test modes, etc.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A pressure cycle fatigue test device is characterized by comprising a base, a positioning structure, a pressure sensor, a driving assembly, a pressure rod and a control assembly, wherein the positioning structure is arranged on the base, the positioning structure is used for fixing a tested workpiece, the pressure sensor is arranged on the positioning structure, the pressure sensor is used for detecting the pressure applied to the tested workpiece, the driving assembly is assembled on the base, the pressure rod is connected to the driving assembly, one end of the pressure rod is right opposite to the position, used for fixing the tested workpiece, of the positioning structure, the driving assembly can drive the pressure rod to move towards the direction close to or far away from the positioning structure, and the control assembly is electrically connected with the pressure sensor and the driving assembly; the control assembly is used for controlling the driving action of the driving assembly according to the pressure signal detected by the pressure sensor, so that the pressure rod can pressurize the tested workpiece in a reciprocating manner within a preset range of pressure.

2. The pressure cycle fatigue testing device of claim 1, wherein the positioning structure comprises a fixing seat and a positioning seat, the fixing seat is fixedly assembled on the base, the pressure sensor is fixed on the side of the fixing seat away from the base, the positioning seat is fixedly assembled on the side of the pressure sensor away from the fixing seat, and a positioning groove for fixing the tested workpiece is formed in the side of the positioning seat away from the pressure sensor.

3. The pressure cycle fatigue test device of claim 2, wherein a circulation through hole communicating with the positioning groove is formed on the periphery of the positioning seat, the pressure cycle fatigue test device further comprises a constant temperature water tank fixed on the base, the constant temperature water tank is connected with the circulation through hole through a pipeline, and water in the constant temperature water tank can flow through the positioning groove.

4. The pressure cycle fatigue test device of any one of claims 1-3, wherein the driving assembly comprises a mounting seat fixed to the base, a sliding block slidably mounted on the mounting seat, and a driving source fixed to the mounting seat and connected to the sliding block, the pressing rod is fixedly connected to the sliding block, and the driving source is configured to drive the sliding block to move toward or away from the base.

5. The pressure cycle fatigue test device of claim 4, wherein the mounting seat is fixed with a first slide rail, the slide block is fixed with a second slide rail, and the first slide rail and the second slide rail are slidably mounted; the drive assembly is characterized in that the drive assembly further comprises a lead screw which is rotatably connected with the assembly seat, the slide block is in threaded assembly with the lead screw, the drive source adopts a servo motor, the output end of the servo motor is connected with the lead screw, and the servo motor is used for driving the lead screw to rotate.

6. The pressure cycle fatigue test device of claim 5, wherein the base is fixed with a mounting block protruding from the surface of the base, and the mounting seat is fixedly mounted on the side of the mounting block far away from the base.

7. The pressure cycle fatigue test apparatus of claim 5, wherein the control assembly comprises a power source, a controller, a servo driver and a digital-to-analog converter, the controller is electrically connected to the power source, the servo driver is electrically connected to the controller and the drive source, and the digital-to-analog converter is electrically connected to the pressure sensor and the controller.

8. The pressure cycle fatigue test apparatus of claim 7, wherein the control assembly further comprises a sense signal amplifier electrically connected before the pressure sensor and the digital-to-analog converter.

9. The pressure cycle fatigue testing device of claim 7, further comprising a housing fixed to the base, the housing extending from the base to a side of the driving assembly away from the base, the controller, the servo driver and the digital-to-analog converter being mounted in the housing, the control assembly further comprising a touch control panel fixed to the housing away from the base, the touch control panel being electrically connected to the controller, the touch control panel being configured to display a current test condition of the denture under test, the touch control panel being configured to input a control command to the controller.

10. The pressure cycle fatigue test apparatus of claim 4, wherein the predetermined range is in the range of 10-500N.