KR101731885B1 - Apparatus for testing spring constant of leaf spring - Google Patents

Apparatus for testing spring constant of leaf spring Download PDF

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Publication number
KR101731885B1
KR101731885B1 KR1020150174271A KR20150174271A KR101731885B1 KR 101731885 B1 KR101731885 B1 KR 101731885B1 KR 1020150174271 A KR1020150174271 A KR 1020150174271A KR 20150174271 A KR20150174271 A KR 20150174271A KR 101731885 B1 KR101731885 B1 KR 101731885B1
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South Korea
Prior art keywords
leaf spring
bush
fixing pin
fastening
pin
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KR1020150174271A
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Korean (ko)
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한진규
김태환
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대원강업주식회사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0075—Strain-stress relations or elastic constants
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0288—Springs
    • G01N2203/029—Leaf spring
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The present invention relates to a test device for a spring constant of a leaf spring. The test device for a spring constant of a leaf spring can test a spring constant of a leaf spring in a same condition as a mounting condition of an actual vehicle by controlling a part of a metal layer and a center pipe to suppress the rotation of the center pipe and the part of the metal layer in a bush mounted on an I-unit of the leaf spring. The test device for a spring constant of a leaf spring includes: two slide jigs supporting the leaf spring and moving to be close or far to correspond to deformation of the leaf spring; and a cross head pressing and deforming the center of the leaf spring supported on the two slide jigs. Each of the leaf springs comprises: a jig body including two holders having V-shaped mounting grooves at the upper end, wherein the two holders are arranged to be separated from each other so that the I-unit of the leaf spring is inserted between the two holders; a fixing pin assembled to the bush to have a structure protruding to both sides of the I-unit while passing through the bush mounted on the I-unit of the leaf spring and mounting the I-unit of the leaf spring on the holder while an end of the fixing pin is mounted on the mounting groove; a first connection unit formed in the fixing pin and connecting the fixing pin and the bush so that the fixing pin and the bush operate together while the first connection unit is connected to the bush; and a second connection unit installed in the jig body and suppressing the rotation of the fixing pin by being connected to the end of the fixing pin mounted on the mounting groove.

Description

[0001] Apparatus for testing spring constant of leaf spring [

The present invention relates to a plate spring constant test apparatus, and more particularly, to a plate spring constant test apparatus for restricting rotation of a metal layer and a center pipe inside a bush mounted on an eye of a leaf spring, To a constant plate spring constant test apparatus capable of testing a constant of the plate spring constant.

Generally, a suspending device of a vehicle absorbs vibrations and shocks generated during traveling while supporting the weight of the vehicle body, thereby relieving vibrations and impacts transmitted to the vehicle body and the driver, thereby ensuring ride comfort and running stability. Respectively.

Various types of suspensions are used depending on the structure. In general passenger cars, McPherson strut type and double wishbone type suspension devices are mainly used. In the case of a large vehicle such as a vans or a middle / large bus, a leaf spring type suspension device It is mainly used.

The leaf spring type suspension device is formed by stacking a plurality of spring plate members. The plurality of stacked spring plate members are joined together by a center bolt, and a child part is formed at both ends of left and right ends of a spring plate member And is coupled to the vehicle body.

Such a leaf spring has a bow-shaped structure and is spread in the form of a straight line by the load transmitted from the vehicle body or the wheel side, thereby alleviating the vibration or impact. When the load is lost, And the deformed plate spring is repeatedly performed by the vibration or shock generated in the running process of the vehicle.

On the other hand, when a leaf spring is applied to a new automobile or a new design is made to improve performance, a test is performed to evaluate the constant of a leaf spring made of a prototype according to a design value.

2 is a perspective view showing a state where one end of a leaf spring is seated on a slide jig provided in a conventional leaf spring constant test apparatus.

Conventionally, a plate spring constant test apparatus includes two slide jigs 20 provided to support both ends of a leaf spring, and a plate spring 10 having both ends supported by the two slide jigs 20, And a crosshead (30) for pressing and deforming.

The conventional plate spring constant testing apparatus detects a load value applied to the leaf spring by using a load cell provided on the crosshead 30 in the process of deforming the leaf spring 10 by the lowering of the crosshead 30, The constant of the leaf spring is tested in such a manner that the amount of deformation of the leaf spring is measured using the moving distance of the crosshead 30 or another measuring means.

The slide jig 20 includes a V-shaped seating groove 21 formed at an upper end thereof and penetrates a central portion of the bush 40 assembled to the eye portion 11 of the leaf spring 10, The fixing pin 12 protruding from the side surface of the slide jig 20 is seated in the seating groove 21 of the slide jig 20 so that the slide jig 20 and the leaf spring 10 are engaged with each other.

3 is a sectional view showing a state where the eye part of the leaf spring is coupled to the bracket of the vehicle body via the slit bush.

3 includes a first metal layer 42, a first rubber layer 43, a second metal layer 44, a second rubber layer 45, and a second metal layer 44 on the outer side of the central pipe 41. [ A slit (not shown) is formed in the longitudinal direction of the bush at a depth corresponding to the first rubber layer 43 from the third metal layer 46, and a third metal layer 46 is sequentially formed. And a washer 47 is provided at both ends of the central pipe.

When the slit bushes are mounted on the eye of the leaf spring 10 and the eyelets assembled with the slit bushes 40 are coupled to the brackets B of the vehicle body, the washers 47 The two washers 47 are tightly pressed against the first and second metal layers 42 and 44 while being pressed against the washer 47 and the first and second metal layers 42 and 44, The washer 47 and the first and second metal layers 42 and 44 are fixed to the bracket B regardless of the deformation of the leaf spring 10 because the two metal layers 42 and 44 are integrated with each other, .

In the case of some bushes such as the slit bushes, although the fixing pin 12 and a part of the metal layer are attached to the bracket B so that rotation is suppressed, There is a problem in that the mounting condition of the antenna can not be realized.

2, in the case of the slide jig 20 provided in the conventional plate spring constant test apparatus, the slide jig 20 and the slide jig 20 are fixed to each other in such a manner that the stationary pin 12 is seated in the seating groove 21 formed at the upper end. Since the coupling of the spring is performed, the structure of the metal layer formed inside the bush and the rotation of the fixing pin can not be constrained, resulting in a problem of low test accuracy.

Open Patent Publication No. 10-2007-0021713 (published on February 23, 2007)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to restrain rotation of some metal layers and a center pipe inside a bush installed on an eye of a leaf spring, And more particularly to a plate spring constant test apparatus capable of testing a constant of a leaf spring.

According to an aspect of the present invention, there is provided a bush of the present invention, which is coupled to a bush mounted on an eye of a leaf spring to support the leaf spring, Two slide jigs configured to move in a moving direction; And a cross head for pressing and deforming a center portion of the leaf spring supported by the two slide jigs, wherein each of the slide jigs has a V-shaped seat groove formed in a center of the two cradles A jig body formed at an upper end of the plate spring so as to have an arrangement structure in which the eye of the plate spring is opposed to the plate spring and the lower end of the jig body is moved along the guide rail; The bush is attached to the bushing so as to have a structure protruding from both sides of the eye part through the bush mounted on the eye part of the leaf spring. Bonding grooves are formed at both ends of the bush. Fixing pin; The fixing pin is fixed to the fixing pin so that the fixing pin and the bushing move together while pressing the side surface of the bushing while being fastened to the respective male screw portions. A first binding means composed of a nut binding the pin and the bush; And a fixing cover which is assembled in a detachable structure at an upper end of each of the cradles to close an opened upper region of the fixing groove and includes a fixing hole located at a vertical upper portion of the fixing pin placed in the fixing groove, And a second fastening means fastened to the fastening hole so as to penetrate the fastening hole and a fixing bolt whose lower end is inserted into the fastening groove of the fastening pin to restrict rotation of the fastening pin.

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According to the present invention having such characteristics as described above, the metal layer formed inside the bush assembled to the eye of the leaf spring and the state of restricting the rotation of the fixing pin assembled to penetrate the bush, that is, The constant test of the leaf spring can be performed under the same condition, so that an accurate test result can be obtained.

Further, the slip angle of the bush can be measured simultaneously with the test of the constant of the leaf spring.

1 is a configuration diagram of a conventional plate spring constant test apparatus,
FIG. 2 is a perspective view showing a state where one end of a leaf spring is seated on a slide jig provided in a conventional plate spring constant test apparatus,
3 is a cross-sectional view showing a state in which a child part of a leaf spring is coupled to a bracket of a vehicle body via a slit bush,
4 is a perspective view of a plate spring constant test apparatus according to a preferred embodiment of the present invention,
FIG. 5 is a perspective view showing a state in which an end portion of a leaf spring is engaged with a slide jig according to the present invention,
FIG. 6 is a sectional view showing a state in which an end of a leaf spring is engaged with a slide jig according to the present invention,
7 is a sectional view showing a fastening structure of a fixing pin and a nut according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 4 is a perspective view of a plate spring constant test apparatus according to a preferred embodiment of the present invention, FIG. 5 is a perspective view showing a state where an end portion of a leaf spring is engaged with a slide jig according to the present invention, FIG. 7 is a cross-sectional view showing a fastening structure of a fixing pin and a nut according to the present invention. FIG.

The plate spring constant test apparatus according to the present invention is capable of performing a test for constant evaluation of the leaf spring in a state in which the leaf spring is fixed under the same condition as the mounting condition of the actual vehicle, (200).

The slide jig 100 is engaged with the bush 40 mounted on the eye 11 of the leaf spring 10 to support the end of the leaf spring so that the slide jig 100 can support the eye formed at both ends of the leaf spring The two slide jigs 100 are spaced apart from each other and are coupled to a guide rail 51 provided on the table 50 of the testing apparatus so that the distance between the slide jigs 100 is adjusted while moving in a direction approaching or separating from each other.

According to a preferred embodiment of the present invention, each slide jig 100 is composed of a jig body 110, a fixing pin 120, a first binding means 130, and a second binding means 140.

The jig body 110 is configured to be movable along a guide rail 51 while being coupled to a guide rail 51 provided on the table 50.

Although not shown in the drawings, the jig body 110 and the guide rail 51 are not shown in detail, but the friction resistance between the jig body 110 and the guide rail 51 is reduced. May be provided.

The jig body 110 includes two cradles 111 for supporting the ends of the leaf springs.

The two cradles 111 are formed at the upper end of the jig body 110 and are formed so as to be vertically erected on the upper end of the jig body 110, Spaced apart < / RTI >

On the other hand, a V-shaped seating groove 112 is formed at the upper end of each cradle 111.

The seating groove 112 is a groove in which the fixing pin 120 protruding to the side of the bush is seated. The seating groove 112 formed at the upper end of the two seatings 111 is formed to be positioned on the same horizontal line, And one end of the fixing pin 120 is seated in the seating groove 112 of one of the seating base 111 and the other end of the fixing pin 120 is seated in the seating groove 112 of the other seating base 111 Respectively.

The fixing pin 120 is installed so as to penetrate through the bush 40 mounted on the eye portion 11 of the leaf spring 10 and is mounted on the seating groove 112 formed at the both ends of the base 111, 10 can be mounted on the slide jig 100.

The fixing pin 120 is formed of a rod member having a circular cross section and having a sufficiently long length to protrude from the right and left side surfaces of the bush 40 through the left and right side surfaces of the bush 40, A screw part 121 to which a nut 123 to be described later is fastened and a coupling groove 122 into which a lower end of a fixing bolt 142 to be described later is inserted are formed on the outer surface of the part.

On the other hand, the male threaded portion 121 is formed at both the left and right ends of the fixing pin 120 so that the nuts 123 can be respectively disposed on both side portions of the bush.

The fastening groove 122 is formed at both the left and right ends of the fixing pin 120 so that the left and right ends of the fixing pin 120 can be constrained by the fixing bolts 142.

The male thread 121 and the coupling groove 122 are formed at the left and right ends of the fixing pin 120 so that the male thread 121 is located inside the binding groove 122. [ According to this structure, the binding groove 122, the male screw portion 121, the male screw portion 121, and the binding groove 122 are sequentially formed from one end of the fixing pin 120 in the opposite side, One male screw portion 121 and one coupling groove 122 are formed on one side of the middle of the male screw portion 121 and one male screw portion 121 and a coupling groove 122 are formed on the opposite side.

In addition, it is preferable that the male screw portion 121 is formed over a sufficiently long section so that at least two nuts 123 can be fastened.

The first binding means 130 binds the bush and the fixing pin 120 so that the fixing pin 120 moves together with the bush. The first binding means 130 includes the male thread 121 and the plurality of nuts 123.

Since the male screw portion 121 has already been described in the process of describing the male screw portion 120, a description of the male screw portion 121 will be omitted.

The nut 123 is fastened to the male thread 121 and presses the side surface of the bush 40 so that the fastening pin 120 and the bush 40 are fastened together. And are fastened to the threaded portions 121, respectively.

In the meantime, according to the preferred embodiment of the present invention, two nuts 123 and 123 'are fastened to the respective male threaded portions 121. Of the two nuts 123 and 123', the inner nut 123, The outer nut 123 is tightened so as to be pressed against the inner nut 123 to prevent the inner nut 123 from being loosened.

According to the nut 123 fastened to press the side surface of the bush 40 as described above, the washer 47 located on the side surface of the bush 40 is pressed by the nut 123 and the metal layers 42, . The nut 123 and the washer 47 are formed on both sides of the bush so that the nut 123 presses the washer 47 and the washer presses the metal layers 42 and 44 again. And the metal layers 42 and 44 are bound together and behave together.

The second binding means 140 is provided on the body 110 and is coupled to the fixing pin 120 to restrict the rotation of the fixing pin 120. The second binding means 140 is fixed to the fixing cover 141 and the fixing bolt 142 .

The fixed cover 141 is composed of a hexahedron block assembled to the upper end of the cradle 111 and is assembled to the upper end of the cradle 111 by bolts 143 to be disassembled and assembled.

More specifically, the fixed cover 141 includes a hexahedral block having a rectangular planar structure corresponding to the top surface structure of the cradle 111, and when the cradle 111 is engaged with the cradle 111, the fixed cover 141 is completely in contact with the top surface of the cradle 111, Thereby closing the open top region of the seating groove 112 formed in the upper end of the base plate 111.

A through hole 1411 through which a bolt is inserted for coupling with the mount table 111 is formed at both ends of the fixed cover 141. A fastening hole 1412 for fastening the fixing bolt 142 is formed at an upper As shown in FIG.

The fixing bolt 142 is inserted into the coupling hole 1412 formed in the fixed cover 141 and the lower end inserted into the coupling groove 122 of the fixing pin 120 placed in the mounting groove 112, This fixing bolt 142 does not require a special structure and has a structure sufficiently long to extend from the fixed cover 141 to the surface of the fixing pin 120. [

The crosshead 200 presses the central portion of the leaf spring 10 supported by the two slide jigs 100 to induce deformation of the leaf spring 10. The leaf spring 10 is moved up and down A load cell 210 for detecting a load applied to the leaf spring 10 and a pressing block 220 for pressing the leaf spring 10 in direct contact with the leaf spring 10 ).

Such a crosshead 200 may be configured to move up and down by rotation of the lead screw in association with a lead screw rotated by the operation of a motor not shown.

The procedure for testing the constant of the leaf spring using the leaf spring constant test apparatus according to the present invention will be described.

First, the bushes 40 are installed on the eye 10 formed at both ends of the leaf spring 10, and the fixing pins 120 are installed together so as to penetrate through the left and right side surfaces of the bush 40. At this time, the fixing pin 120 is installed to have a structure in which the male screw portion 121 formed at the left and right ends of the fixing pin 120 protrudes to the side of the bush 40.

Thereafter, one or more nuts 123 are fastened to the male screw portions 121 formed at both ends of the fixing pin 120, and the nut 123 is tightened with sufficient torque so as to press the side surface of the bush 123 .

On the other hand, preferably, two nuts 123 and 123 'are fastened to the male threads 121, respectively.

When the nut 123 is fastened to both ends of the fixing pin 120 as described above, the leaf spring is disposed so that both ends of the fixing pin 120 are seated in the seating groove 112 formed at the upper end of the slide jig 100 do.

A fixing cover 141 is provided on the upper end of the cradle 111 formed on the slide jig 100 and then a fixing bolt 142 is provided on the fixing hole 1412 formed at the center of the fixing cover 141, The fixing bolt 142 is sufficiently tightened so that the lower end of the fixing bolt 142 is inserted into the coupling groove 122 formed in the fixing pin 120. [

The mounting operation of the stationary cover 141 and the fixing bolt 142 is repeatedly performed on the right and left ends of the leaf spring 10 in the same manner.

When the left and right ends of the leaf spring 10 are coupled to the slide jig 100 through the process described above, the metal layers 42 and 44 and the washer 47 formed on the bush 40, The fixing pin 120 is fixed to the jig body 110 by the fixing bolt 142 and is prevented from rotating so that the fixing pin 120 is rotated The constant test of the leaf spring can be performed in a state in which the rotation of the fixing pin 120 and the bushing 40 is suppressed.

The actual plate spring constant test is performed to induce the deformation of the leaf spring by the descent of the crosshead 200. The deformation of the leaf spring is measured by using the load value measured at the load cell and the deformation amount of the leaf spring, The spring constant is evaluated, and this evaluation method is the same as the conventional method.

However, the plate spring constant test apparatus according to the present invention can additionally measure the slip angle of the bush.

For reference, when a bush containing metal layer and rubber layer is subjected to deformation exceeding the deformation limit allowed by the rubber layer, a slip phenomenon occurs between the inner metal layer and the rubber layer, causing a relative rotation between the metal layer and the rubber layer In this process, the rubber layer is restored to its original state, so that the rubber layer can be prevented from being damaged.

The slip angle between the metal layer and the rubber layer is referred to as the slip angle.

In the case of the conventional plate spring constant testing apparatus, since the fixing pin 120 rotates together with the deformation of the leaf spring, in the case of the conventional plate spring constant testing apparatus, the slip phenomenon occurring between the inner metal layer and the rubber layer of the bushing As a result, it was impossible to measure the slip angle.

In the meantime, since the fixing pin 120 and the inner metal layer of the bushing are fixed to the slide jig 100 and fixed at the initial stage of deformation of the leaf spring, the rubber layer inside the bushing deforms When the deformation amount of the leaf spring exceeds the deformation limit of the rubber layer, a slip phenomenon occurs between the metal layers of the rubber layer, and a slip angle is generated.

Therefore, it is possible to further evaluate the slip angle of the bushing by confirming the angle at which the marking line is shifted after the marking line is formed on the side surface of the bushing prior to the constant test of the plate spring and after the completion of the constant test of the plate spring.

As described above, the plate spring constant test apparatus according to the present invention performs the constant test under the condition that rotation of the bush and the fixing pin 120 is suppressed, that is, under the same condition as the mounting condition of the actual vehicle, There is an advantage in that an additional evaluation of the slip angle of the bush is possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

Description of the Related Art
100: slide jig 110: jig body
111: cradle 112: seat groove
120: fixing pin 121: male thread portion
122: coupling groove 123: nut
130: first binding means 140: second binding means
141: fixed cover 1412: fastening hole
142: Fixing bolt 200: Crosshead

Claims (4)

Two slide jigs supported by the bush mounted on the eye portion of the leaf spring to support the leaf spring and configured to move in a direction approaching or moving away from each other corresponding to deformation of the leaf spring; And a crosshead for pressing and deforming a center portion of the leaf spring supported by the two slide jigs,
Each of the slide jigs comprises:
The V-shaped mounting groove is formed in the upper end portion so as to have an arrangement structure in which the two mounting bases formed on the upper end face each other with the eye portion of the leaf spring therebetween and the lower end portion is coupled to the guide rail provided on the table of the testing apparatus, A jig body adapted to be mounted on the body;
The bush is attached to the bushing so as to have a structure protruding from both sides of the eye part through the bush mounted on the eye part of the leaf spring. Bonding grooves are formed at both ends of the bush. Fixing pin;
The fixing pin is fixed to the fixing pin so that the fixing pin and the bushing move together while pressing the side surface of the bushing while being fastened to the respective male screw portions. A first binding means composed of a nut binding the pin and the bush; And
A fixed cover which is assembled in a detachable structure at an upper end of each of the cradles and includes a fastening hole formed at a vertically upper portion of a fastening pin which is formed to close an opened upper region of the fastening groove, And a second fastening means fastened to the fastening hole and having a lower end inserted into the fastening groove of the fastening pin to fix the rotation of the fastening pin. delete delete delete
KR1020150174271A 2015-12-08 2015-12-08 Apparatus for testing spring constant of leaf spring KR101731885B1 (en)

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KR20180067126A (en) * 2016-12-12 2018-06-20 주식회사 포스코 Apparatus and Method for testing plate spring
CN109269886A (en) * 2018-09-28 2019-01-25 西安力创材料检测技术有限公司 A kind of sound device for testing stiffness of engine mounting bushing three-dimensional load
KR101925729B1 (en) * 2017-11-07 2019-02-26 황철호 Multipurpose tester for spring
KR102255891B1 (en) * 2021-01-29 2021-05-24 임병철 A Test Apparatus Of Leaf Spring For Automotive
KR200494385Y1 (en) * 2021-01-29 2021-09-29 허권 A Test Apparatus Of Leaf Spring For Automotive Available of Convinient Testing
CN113933170A (en) * 2021-10-13 2022-01-14 江西弘力汽车零部件有限公司 Steel plate spring stiffness testing device
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KR102365691B1 (en) 2020-10-14 2022-02-23 한국철도기술연구원 Jig for experiment of characteristic of axial rubber spring and experiment method of characteristic axial rubber spring using thereof
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KR101446590B1 (en) * 2013-06-28 2014-10-06 대원강업주식회사 Jig for measuring lateral stiffness of spring

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KR101446590B1 (en) * 2013-06-28 2014-10-06 대원강업주식회사 Jig for measuring lateral stiffness of spring

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KR101981451B1 (en) 2016-12-12 2019-08-28 주식회사 포스코 Apparatus and Method for testing plate spring
KR20180067126A (en) * 2016-12-12 2018-06-20 주식회사 포스코 Apparatus and Method for testing plate spring
KR101925729B1 (en) * 2017-11-07 2019-02-26 황철호 Multipurpose tester for spring
CN109269886A (en) * 2018-09-28 2019-01-25 西安力创材料检测技术有限公司 A kind of sound device for testing stiffness of engine mounting bushing three-dimensional load
CN109269886B (en) * 2018-09-28 2024-02-23 西安力创材料检测技术有限公司 Dynamic and static rigidity testing device for three-way loading of engine suspension bushing
KR102365691B1 (en) 2020-10-14 2022-02-23 한국철도기술연구원 Jig for experiment of characteristic of axial rubber spring and experiment method of characteristic axial rubber spring using thereof
KR102255891B1 (en) * 2021-01-29 2021-05-24 임병철 A Test Apparatus Of Leaf Spring For Automotive
KR200494385Y1 (en) * 2021-01-29 2021-09-29 허권 A Test Apparatus Of Leaf Spring For Automotive Available of Convinient Testing
CN113933170A (en) * 2021-10-13 2022-01-14 江西弘力汽车零部件有限公司 Steel plate spring stiffness testing device
CN113933170B (en) * 2021-10-13 2023-10-03 江西弘力汽车零部件有限公司 Leaf spring rigidity testing arrangement
CN113945346A (en) * 2021-10-15 2022-01-18 江西弘力汽车零部件有限公司 Leaf spring fatigue test device
CN113945346B (en) * 2021-10-15 2023-10-03 江西弘力汽车零部件有限公司 Leaf spring fatigue testing device
CN114623992A (en) * 2022-03-14 2022-06-14 一汽解放汽车有限公司 Leaf spring loading test bench
CN114623992B (en) * 2022-03-14 2024-04-12 一汽解放汽车有限公司 Steel plate spring loading test bench
CN116754195A (en) * 2023-05-11 2023-09-15 山东双力板簧有限公司 Spring fatigue degree detection device for flat spring production
CN116754195B (en) * 2023-05-11 2024-01-23 山东双力板簧有限公司 Spring fatigue degree detection device for flat spring production
CN116858525B (en) * 2023-09-05 2023-11-21 天津航天瑞莱科技有限公司 Leaf spring fatigue test device
CN116858525A (en) * 2023-09-05 2023-10-10 天津航天瑞莱科技有限公司 Leaf spring fatigue test device
CN117007435B (en) * 2023-10-07 2023-12-19 宝鸡金卡特制造工程有限公司 Pipe detection device
CN117007435A (en) * 2023-10-07 2023-11-07 宝鸡金卡特制造工程有限公司 Pipe detection device
CN118090482A (en) * 2024-04-19 2024-05-28 天津磊峰实业有限公司 Steel plate mechanical property detection device

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