KR101692154B1 - Apparatus for vibration test of caster - Google Patents

Apparatus for vibration test of caster Download PDF

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Publication number
KR101692154B1
KR101692154B1 KR1020150079659A KR20150079659A KR101692154B1 KR 101692154 B1 KR101692154 B1 KR 101692154B1 KR 1020150079659 A KR1020150079659 A KR 1020150079659A KR 20150079659 A KR20150079659 A KR 20150079659A KR 101692154 B1 KR101692154 B1 KR 101692154B1
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KR
South Korea
Prior art keywords
vibration
caster
pressing
load
arm
Prior art date
Application number
KR1020150079659A
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Korean (ko)
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KR20160143239A (en
Inventor
장성호
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장성호
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Priority to KR1020150079659A priority Critical patent/KR101692154B1/en
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Publication of KR101692154B1 publication Critical patent/KR101692154B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028—Force sensors associated with force applying means
    • G01L5/0038—Force sensors associated with force applying means applying a pushing force
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/025—Measuring arrangements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The present invention relates to a caster vibration testing apparatus, and more particularly, to a caster vibration testing apparatus that includes a caster mounting portion to which a caster to be tested is mounted, a roller member contacting the wheel of the mounted caster and having a projection for vibrating the caster, And a load pressing portion for measuring a load change due to vibration while applying a load to the mounted casters.
According to the present invention, it is possible to provide reliable test data on the vibration performance of the casters, and it is convenient that the vibration performance can be confirmed visually even in the test process, It has the advantage of testing performance.

Description

[0001] Apparatus for vibration test of caster [0002]

The present invention relates to a caster vibration tester capable of effectively testing vibration performance of a caster.

In general, a caster is a moving device such as a chair, a bed, a medical device, etc., or a peripheral component related to a wheel and a wheel, which is mounted on the bottom of a transportation car to move the heavy cargo to a specific place, .

Such casters are particularly susceptible to vibration generated during transportation. Recently, as disclosed in Japanese Patent No. 10-0922854, a suspension device is installed between a bogie and a caster to absorb vibrations and shocks generated during operation of the bogie There have been proposed techniques for preventing the carriage mounted on the carriage from being burned and techniques for solving the problem due to vibration by constituting a buffer means on the castor itself as disclosed in Japanese Patent No. 10-0741464 have also been proposed.

However, there is a lack of reliable data on the vibration performance of the casters that have been shown to have the effect of resolving such vibrations, because of the lack of studies on the test apparatuses to measure and test the vibration performance of such casters.

Accordingly, the present applicant has developed a caster vibration tester capable of efficiently testing the vibration performance of casters of various sizes so as to secure reliable test data on the vibration performance of the casters.

Patent No. 10-0922854: Castor with Suspension Registration No. 10-0741464: Buffered castor

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide an apparatus and a method for efficiently testing vibration performance of a caster to secure reliable test data, And to provide a caster vibration testing device capable of easily testing vibration performance under various specifications and various test conditions.

In order to achieve the above object, according to the present invention,

A lifting frame for lifting and lowering the lifting frame; a grip arm rotatably installed on the lifting frame; a caster attaching part formed on a front end of the grip arm and fitted with a caster to be tested, A vibration generating unit including a roller member having a projection for vibrating the caster on the outer circumferential surface thereof and contacting with a wheel of the mounted castor, and a driving motor for rotating the roller member; A load pressing portion formed of a pressing member for pressing the mounting base downward to apply a load to the caster and a load cell mounted on the elevating frame below the pressing member for measuring a change in load caused by vibration of the caster; A hollow transparent container provided in the front of the caster, And a vibration isolator formed of a vibration check ball which is caused to flow in accordance with the vibration, wherein the pressing member includes: an arm fixing body fixed to a rear end of the grip arm; a pressing spring body positioned below the arm fixing body; A bolt which is vertically penetrated through the arm fixture and the pressure spring body and is coupled to the load cell at the lower side of the arm fixture and the bolt at the lower portion of the arm fixture and under the pressure spring body to adjust the pressing force of the pressure spring body A caster vibration testing device is disclosed.

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According to the caster vibration testing apparatus of the present invention,

It is possible to provide reliable test data on the vibration performance of the casters, and it is convenient that the vibration performance can be visually checked during the test process, and the vibration performance of the casters can be easily tested in various specifications and various test conditions It is effective.

It is to be noted that, in addition to the effect specifically described above, a specific effect that can be easily derived and expected from the characteristic configuration of the present invention can also be included in the effect of the present invention.

1 is a diagram illustrating the overall configuration of a caster vibration testing apparatus according to an embodiment of the present invention,
Figure 2 is a side view of Figure 1,
Fig. 3 is a view illustrating in detail the front end side of the caster vibration testing apparatus, the casters mounting portion and the vibration discriminating portion,
Fig. 4 is a view showing in detail the rear end side and the load pressing portion of the caster vibration testing apparatus.

Hereinafter, preferred embodiments of a caster vibration testing apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention to those skilled in the art, It should be noted that the present invention can be reduced or exaggerated for the sake of simplicity.

It is also to be understood that, in the description of the embodiments, when an element is described as being "installed", "formed" or "coupled" to another element, it is to be understood that the element But it should be understood that there may be other components in between.

In addition, when describing the embodiments, in the case where it is judged that the technical characteristics of the present invention may be unnecessarily blurred as a matter of fact obviously known to those skilled in the art, such as known functions and configurations known in the art, Description thereof will be omitted.

1 to 4 illustrate a caster vibration testing apparatus according to an embodiment of the present invention. As illustrated in the drawings, a caster vibration testing apparatus 10 (hereinafter referred to as " (Hereinafter abbreviated as " test apparatus ") may include a caster mounting section 100, a vibration generating section 200, and a load pressing section 300.

First, the caster mounting portion 100 is a portion to which the caster C to be subjected to the vibration test is mounted.

The casters 100 may include a lifting frame 110, a grip arm 120, and a mounting table 130.

The lifting frame 110 is installed on the guide post 111 so that the height of the lifting frame 110 relative to the roller member 210 of the vibration generating part 200 is adjusted while the lifting frame 110 is lifted and lowered.

The grip arm 120 is rotatably installed on the lifting frame 110 and extends in the front-rear direction of the lifting frame 110.

The grip arm 120 is rotatable on the basis of the lifting frame 110 and moves up and down together with the lifting and lowering of the lifting frame 110.

The mounting base 130 is formed at the front end of the grip arm 120, and the castor to be tested C is mounted on the lower side and fixed.

A separate vibration measuring device (not shown) such as an oscilloscope for measuring the vibration phenomenon of the caster C may be connected to the upper side of the mounting table 130.

Next, the vibration generating portion 200 is a portion that generates vibration in the castor (C) to be tested mounted on the castor mounting portion (100).

The vibration generating unit 200 may include a roller member 210 and a driving motor 220.

The roller member 210 is rotatably provided at a lower portion of the mounting table 130 and is rotated by the driving motor 220.

The roller member 210 is brought into contact with the wheel w of the caster C when the lifting frame 110 is lowered while the caster C is mounted on the mounting base 130. [

At least one protrusion 211 protrudes from the outer circumferential surface of the roller member 210 across the left and right sides of the roller member 210. The protrusion 211 functions to cause the caster C to vibrate when the roller member 210 rotates, .

The driving motor 220 is connected to the roller member 210 through the power transmitting element 230 and provides rotational force to the roller member 210 when the power is applied.

Next, the load pressing portion 300 is a portion for measuring a load change due to the vibration applied to the castor C by the vibration generating portion 200 while applying a load to the castor C.

The load applying unit 300 may include a pressing member 310 and a load cell 320.

The pressing member 310 is installed at the opposite side of the mounting base 130, that is, at the rear end of the grip arm 120, and presses the mounting base 130 downward through the rotatable grip arm 120, C).

The load cell 320 is fixed to the lifting frame 110 while being positioned below the pressing member 310 and measures a load change transmitted from the pressing member 310 in accordance with the vibration of the caster C. [

As shown in FIG. 4, for example, the pressing member 310 may include various types of pressing members such as an arm fixing body 311, a pressing spring body 312, a bolt 313, And nuts 314a and 314b.

The arm fixing body 311 is fixed to the rear end of the grip arm 120 and the pressing spring body 312 is positioned below the arm fixing body 311.

The bolt 313 has a lower end connected to the load cell 320 and extends vertically so as to pass through the upper arm fixing member 311 and the pressing spring member 312.

The adjustment nuts 314a on the upper side are fastened to the bolts 313 on the upper side of the arm fixing body 311 and the adjustment nuts 314b Is fastened to the bolts 313 at the lower part of the pressing spring body 312.

The adjustment nuts 314a and 314b adjust the pressing force of the pressing spring body 312 in accordance with the fastening position of the bolts 313 and apply the force to the caster C through the adjustment of the pressing spring body 312 So that various loads can be set.

The caster mounting portion 100 and the load pressing portion 300 of the above-described configuration may be provided in a pair so as to simultaneously test a pair of casters C as illustrated in the drawings.

According to the embodiment, the test apparatus 10 of the present invention having the above-described configuration may further include a vibration identifier 400 so that the test person can immediately confirm the vibration of the caster C with the naked eye have.

The vibration identification device 400 is disposed in front of the caster mounting part 100 and includes a hollow transparent container 410 and a vibration check ball 420 housed in the transparent container 410, (420).

When the caster C vibrates, the vibration identifier 400 flows according to the vibration applied to the vibration confirmation ball 420 received in the transparent container 410. Therefore, It is possible to visually judge the vibration performance of the caster C directly.

In the test apparatus 10 of the present invention, the above-described components 100, 200, and 300 are installed in the apparatus body 500, and the test apparatus 100 of the present invention A speed controller for controlling the drive motor 220 to vary the rotational speed of the roller member 210 according to test conditions, a display unit for displaying the load applied to the caster C and the rotational speed, and the like . ≪ / RTI >

Hereinafter, the operation of the test apparatus 10 according to the present invention will be briefly described.

First, the test subject casters C are mounted and fixed to the lower part of the mounting table 130 of the casters mounting part 100 in a state where the lifting frame 110 is lifted. On the upper side of the mounting table 130, Install it.

After the adjusting nuts 314a and 314b of the pressing member 310 are adjusted so that the grip arm 120 of the caster mounting portion 100 is leveled, the lifting frame 100 is lowered, (w) contact the roller member (210).

In this state, if the upper adjustment nut 314a of the pressure member 310 is slightly loosened, the pressing load resulting from the restoration of the pressure spring body 312 is transmitted to the caster C at the front end portion through the grip arm 120, The pressing force is applied to the load cell 320 along the bolt 313 of the pressing member 310 because the caster C is in contact with the roller member 210 and the pressing load is measured. By tightening or loosening the adjusting nut 314b on the lower side, the pressing member 310 is set with the pressing load corresponding to the test conditions.

When the setting of the castor C and the pressing load is completed, power is applied to the driving motor 220 of the vibration generating unit 200 to drive it.

The roller member 210 is rotated so that the wheel w of the caster C that is in contact with the roller member 210 rotates together with the roller member 210. During rotation of the roller member 210, (C) is repeatedly subjected to vibration.

The vibration phenomenon applied to the casters C is measured through the vibration measuring instrument connected to the mounting table 130 and the load cell 320 continuously measures the pressing load variation of the pressing member 310 due to vibration , And the vibration performance of the castor (C) to be tested can be accurately tested through these measured values.

At the same time, since the vibration confirmation ball 420 of the vibration identification device 400 flows due to the vibration applied to the caster C, the movement of the vibration confirmation ball 420 is visually confirmed, The vibration performance of the caster C can be visually checked during the process.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the technical scope of the invention is not limited to the disclosed exemplary embodiments and drawings, It will be understood that the modified equivalent structure is not limited to the scope of the present invention.

The main parts of the accompanying drawings are as follows.
100: casters mounting part 110: lift frame
120: Ziret arm 130: mounting base
200: Vibration generator 210: Roller member
220: drive motor 300: load pressing portion
310: pressing member 320: load cell
400: Vibration detector 410: Transparent container
420: Vibration check ball

Claims (4)

A lift arm 120 rotatably installed on the lifting frame 110 and a lifting frame 120 which is formed at a front end of the lifter arm 120 to be tested, And a mounting table 130 connected to the vibration measuring device.
A roller member 210 contacting the wheel w of the mounted castor C and having a projection 211 for vibrating the caster C on its outer circumferential surface and a drive motor 210 for rotating the roller member 210 220;
A pressing member 310 installed at the rear end of the grip arm 120 and applying a load to the caster C by pressing the mounting base 130 of the front end downward; A load pressurization unit 300 installed on the caster C to measure a load change according to the vibration of the caster C;
A hollow transparent container 410 provided in front of the mounting stand 130 of the casters mounting part 100 and a vibration confirmation ball 420 accommodated in the transparent container 410 and flowing in accordance with the vibration of the castor C And a vibration identification unit (400)
The pressing member 310 includes an arm fixing body 311 fixed to the rear end of the grip arm 120, a pressing spring body 312 positioned below the arm fixing body 311, A bolt 313 which is vertically penetrated through the fixing body 311 and the pressing spring body 312 while being coupled to the lower load cell 320 and a bolt 313 which is inserted into the upper portion of the arm fixing body 311 and the upper portion of the pressing spring body 312 And adjustment nuts (314a, 314b) fastened to the bolts (313) at the lower part to adjust a pressing force of the pressure spring body (312). delete delete delete
KR1020150079659A 2015-06-05 2015-06-05 Apparatus for vibration test of caster KR101692154B1 (en)

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KR1020150079659A KR101692154B1 (en) 2015-06-05 2015-06-05 Apparatus for vibration test of caster

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Application Number Priority Date Filing Date Title
KR1020150079659A KR101692154B1 (en) 2015-06-05 2015-06-05 Apparatus for vibration test of caster

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KR101692154B1 true KR101692154B1 (en) 2017-01-03

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111256931A (en) * 2020-02-26 2020-06-09 寇引霞 Steel frame shock resistance detection equipment and detection method
CN114252226A (en) * 2020-09-21 2022-03-29 维谛技术(西安)有限公司 Test method of cabinet
KR102369122B1 (en) * 2021-11-08 2022-03-02 정준호 Vibration sensing apparatus for pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007003218A (en) * 2005-06-21 2007-01-11 Yokohama Rubber Co Ltd:The Tire characteristic measuring device and tire characteristics measuring method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0915086A (en) * 1995-06-27 1997-01-17 Ricoh Co Ltd Impact excitation device
KR20060041330A (en) * 2004-11-08 2006-05-11 한국타이어 주식회사 Drum structure of tire impact load measuring device
KR100741464B1 (en) 2006-07-21 2007-07-20 경창정공 주식회사 Shock-absorbing type caster
KR100922854B1 (en) 2007-07-18 2009-10-20 김춘식 Having a suspention the caster

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007003218A (en) * 2005-06-21 2007-01-11 Yokohama Rubber Co Ltd:The Tire characteristic measuring device and tire characteristics measuring method

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