KR20090050843A - Complex testing jig for connecting rod and crank shaft - Google Patents

Complex testing jig for connecting rod and crank shaft Download PDF

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Publication number
KR20090050843A
KR20090050843A KR1020070117492A KR20070117492A KR20090050843A KR 20090050843 A KR20090050843 A KR 20090050843A KR 1020070117492 A KR1020070117492 A KR 1020070117492A KR 20070117492 A KR20070117492 A KR 20070117492A KR 20090050843 A KR20090050843 A KR 20090050843A
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KR
South Korea
Prior art keywords
connecting rod
crankshaft
test
jig
coupled
Prior art date
Application number
KR1020070117492A
Other languages
Korean (ko)
Inventor
김종구
Original Assignee
현대자동차주식회사
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Publication date
Application filed by 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020070117492A priority Critical patent/KR20090050843A/en
Publication of KR20090050843A publication Critical patent/KR20090050843A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02—Constructions of connecting-rods with constant length
    • F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/02—Gearings; Transmission mechanisms
    • 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
    • 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
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating 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
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0073—Fatigue

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

The present invention enables the mounting rod and the crankshaft to be mounted on a facility for testing mechanical properties in a state where the connecting rod and the crankshaft are mutually assembled. The purpose is to be able to provide, and to improve the reliability of the results of mechanical properties tests on the resulting connecting rod and crankshaft.

The present invention for achieving the above object, the upper jig 10 is coupled to the small end (1a) of the connecting rod (1) and installed on the movable portion (52) of the test facility for the complex test (50); The lower jig 12 coupled to the large end portion 1b of the connecting rod 1 and the journal portion 3a of the crankshaft 3 and installed on the fixed support portion 54 of the test facility 50 for the composite test. And; And a flow path for supplying lubricating oil to the permeate portions of the small end portion 1a and the large end portion 1b of the connecting rod 1 and the journal portion 3a of the crankshaft 3, respectively. .

Description

Complex testing jig for connecting rod and crank shaft

The present invention relates to a jig device for a connecting rod and a crankshaft composite test, and more particularly, for a connecting rod and a crankshaft composite test to be installed in a facility for testing mechanical properties in a state where the connecting rod and the crankshaft are mutually assembled. It relates to a jig device.

In general, among the many components constituting the vehicle, the components applied to the drive system such as the engine and the transmission are verified various mechanical properties to secure durability performance.

In one example, the connecting rod is to connect between the piston and the crankshaft in the cylinder to convert the linear driving force generated in the explosion stroke of the engine to the driving force in the rotational direction through the crankshaft.

Accordingly, conventionally, in order to verify various mechanical characteristics of the connecting rod and the crankshaft, various kinds of test facilities are installed, where the connecting rod and the crankshaft are connected to the test facility through a jig that meets the corresponding test conditions. Is mounted.

In addition, the conventional mechanical property test for the connecting rod and the crankshaft is made through a tension-compression uniaxial load test facility or a bending load test facility for each unit.

That is, the conventional tension-compression uniaxial load test facility for testing the mechanical properties of the connecting rod is connected to the tester through the jig through the large and small ends of the connecting rod, respectively, and then the tension of the connecting rod through the operation of the tester. And a cyclic load of compression was applied to perform a fatigue test on the shank portion of the connecting rod.

In this case, the lower end of the connecting rod is connected to a tension-compression uniaxial load test facility by using a dummy pin, so that there is a large difference from the load received in the actual use environment, which lowers the reliability of the test results. There was a problem.

In addition, the mechanical load test facility of the conventional crankshaft, the bending load test facility is connected to the tester through the jig through each part of the crankshaft, respectively, and by applying the repeating load in the bending direction to the crankshaft through the operation of the tester of the crankshaft Fatigue strength against the fillet was tested.

Even in this case, the connecting rod has a large difference from the bending load in the rotational direction which is received in the actual use environment, and thus there is a problem in that the reliability of the test result due to the stress distribution on the pin fillet of the connecting rod is degraded.

In other words, the mechanical properties of the conventional connecting rod and the crankshaft test are provided with the test equipment for each unit and the loads that are not completely consistent with the loads received in the actual use environment are given. Reliability is lowered, and in actual engines, connecting rods and crankshafts are mechanical elements that are linked to each other rather than to operate independently of each other. In the environment, it was not possible to implement verification tests for various mechanical properties.

Accordingly, the present invention has been made to solve the above-mentioned problems, by being able to be installed in a facility for testing the mechanical properties of the connecting rod and the crankshaft mutually assembled, under an environment similar to the actual operating state of the engine The purpose of the present invention is to optimally simulate the load generated and provide it to the connecting rod and the crankshaft, and to improve the reliability of the results of the mechanical property test on the connecting rod and the crankshaft obtained through the result.

The present invention for achieving the above object includes an upper jig coupled to the small end of the connecting rod, and a lower jig coupled to the journal portion of the crankshaft assembled with the large end of the connecting rod;

The upper jig has an installation end coupled with the movable portion of the test facility for the composite test, and the lower jig has an installation end coupled with the fixed support of the test facility.

In addition, the upper jig is coupled via a small end of the connecting rod and a connecting rod pin, and the lower jig is divided into a first jig and a second jig assembled up and down around the journal. .

According to the jig apparatus for the connecting rod and the crankshaft complex test according to the present invention, the mechanical properties of the connecting rod and the crankshaft installed in the transmission path of the power outputting the driving force transmitted through the piston to the transmission during the explosion stroke of the engine Since the connecting rod and the crankshaft can be installed in the test equipment with each other assembled, the mechanical properties test of the connecting rod and the crankshaft optimally simulates the load realized in the actual engine operating state. It can be provided on the shafts individually, which improves the reliability of the results of the mechanical property tests on the connecting rod and the crankshaft.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in the figure, the jig apparatus for connecting rod and crankshaft composite test according to the present invention includes an upper jig 10 coupled with a small end 1a of the connecting rod 1, and a journal of the crankshaft 3; It consists of a lower jig 12 coupled with the portion 3a.

The upper jig 10 has a mounting end 10a coupled through a small end 1a of the connecting rod 1 and a connecting rod pin 1c, and a test for a complex test on the upper end of the mounting end 10a. The installation end 10b which is engaged with the movable part 52 of the installation 50 is integrally provided.

In this case, a through portion (not shown) for inserting the connecting rod pin 1c is formed at the mounting end 10a of the upper jig 10.

The lower jig 12 is coupled to the journal portion 3a of the crankshaft 3 assembled through the large end portion 1b of the connecting rod 1 and the crank pin 3b. 12 includes a first jig 12a and a second jig 12b, which are divided up and down and assembled around the journal portion 3a, and extend integrally from the second jig 12b. It is provided with an installation end portion 12c that is coupled to the fixed support portion 54 of the test facility 50 for the composite test.

In this case, at each joining surface of the first jig 12a and the second jig 12b of the lower jig 12, a recessed recess portion (not shown) formed concave for mounting the journal portion 3a. Of course, both ends of the first jig (12a) and the second jig (12b) are coupled to each other through a coupling member (not shown) of the bolt and nuts.

The test facility for the composite test 50 includes a perturbation portion between the connecting rod 1, the small end 1a, and the connecting rod pin 1c, the connecting rod 1, the large end 1b, and the crank pin. (3b) is provided with an oil supply part (not shown) for supplying lubricating oil, respectively, in the perturbation part between (3b), the oil supply using the oil supply part being connected to the connecting rod (1) and the crank shaft (3). It is made through the flow path of the oil formed inside the.

That is, the flow path is in communication with the oil inlet port 3a 'formed in the journal portion 3a of the crankshaft 3 and the oil inlet port 3a', and is formed within the journal unit 3a. An oil supply passage L1 and a second oil supply passage L2 communicating with the first oil supply passage L1 and penetrating through the crank pins 3b are formed along the inside of the connecting rod 1. The second oil supply passage L2 extends through the small end 1a of the connecting rod 1 to reach the outer circumferential surface of the connecting rod pin 1c.

Therefore, the connecting rod 1 and the crankshaft 3 are respectively installed on the upper jig 10 and the lower jig 12 in a state in which the crank pins 3b are assembled, and the upper jig (10) and the lower jig (12), respectively, installed in the movable portion 52 and the fixed support portion 54 of the test facility for the complex test 50, the movable part 52 of the test facility 50 for the composite test By operation it is possible to carry out a fatigue test for bending loads as well as a fatigue test for uniaxial loads of tension-compression on the connecting rod 1 and the crankshaft 3.

In this case, since the connecting rod 1 and the crankshaft 3 are coupled to each other, a situation very similar to a state operated by combustion pressure in a cylinder of an actual engine can be reproduced, thereby improving reliability of the endurance test. It can be improved. That is, the mechanical property test of the connecting rod 1 and the crankshaft 3 performed in the series of steps as described above can realize the repetitive provision of the load almost similar to that in the actual engine operating environment. do.

In particular, the lubrication of the small end 1a and the large end 1b of the connecting rod 1 and the lubrication of the journal part 3a of the crankshaft 3 are actually carried out through the flow path by the oil supply part. Since it can be implemented in the same way as in the engine, the reliability of the results for the mechanical property tests on the connecting rod 1 and the crankshaft 3 can be further improved.

In this case, the lubrication of the small end 1a of the connecting rod 1 simulates the state of the load applied to the piston during the explosive stroke in the actual cylinder, and the lubrication of the gap caused by the crankshaft 3 It will be copied.

In addition, lubrication of the large end portion 1b of the connecting rod 1 simulates the gap with the crankshaft 3, and lubrication of the journal portion 3a of the crankshaft 3 is When in contact with the lower jig 12 can be expected to simulate the effect of the main bearing in the actual engine.

1 is a state diagram used in the jig device for a composite test according to the present invention.

Figure 2 is a view showing a state in which the jig device for a composite test according to the present invention are respectively installed on the connecting rod and the crankshaft.

<Description of Symbols for Main Parts of Drawings>

1-connecting rod 1a-small end

1b-to-end 1c-connecting rod pin

3-crankshaft 3a-journal section

3b-crank pin

10-top jig 12-bottom jig

50-complex test equipment

Claims (4)

An upper jig 10 coupled to the small end 1a of the connecting rod 1 and installed on the movable part 52 of the test facility 50 for a complex test; It is coupled to the journal portion (3a) of the crankshaft (3) coupled via the large end (1b) and the crank pin (3b) of the connecting rod (1), the fixed support of the test facility (50) for the composite test ( A lower jig 12 installed at 54); For lubrication provided from the oil supply part of the test equipment 50 for the complex test at the perturbation part of the small end 1a and the large end 1b of the connecting rod 1 and the journal part 3a of the crankshaft 3. Jig device for connecting rod and crankshaft complex test having flow path for supplying oil, respectively. The method according to claim 1, The upper jig 10 has a mounting end portion 10a coupled to the small end portion 1a of the connecting rod 1 and a connecting rod pin 1c by a medium, and the upper portion of the mounting end portion 10a. Jig device for connecting rod and crankshaft complex test, characterized in that it has an installation end (10b) coupled to the movable portion 52 of the test facility (50). The method according to claim 2, The flow path communicates with an oil inlet port 3a 'formed in the journal portion 3a of the crankshaft 3, and a first oil formed inside the journal unit 3a in communication with the oil inlet port 3a'. Small end 1a of the connecting rod 1 along the inside of the connecting rod 1 through the supply passage L1 and the first oil supply passage L1 and passing through the crank pin 3b. Jig apparatus for connecting rod and crankshaft complex test, characterized in that the second oil supply passage (L2) extending to reach the outer circumferential surface of the connecting rod pin (1c) through. The method according to claim 1, The lower jig 12 has a first jig 12a and a second jig 12b, which are divided up and down and assembled around the journal portion 3a, and from the second jig 12b. Jig device for connecting rod and crankshaft composite test, characterized in that it has an installation end (10b) which is integrally extended and coupled with the fixed support (54) of the test facility for the complex test (50).
KR1020070117492A 2007-11-16 2007-11-16 Complex testing jig for connecting rod and crank shaft KR20090050843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070117492A KR20090050843A (en) 2007-11-16 2007-11-16 Complex testing jig for connecting rod and crank shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070117492A KR20090050843A (en) 2007-11-16 2007-11-16 Complex testing jig for connecting rod and crank shaft

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KR20090050843A true KR20090050843A (en) 2009-05-20

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KR1020070117492A KR20090050843A (en) 2007-11-16 2007-11-16 Complex testing jig for connecting rod and crank shaft

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109668743A (en) * 2019-02-26 2019-04-23 北京福田戴姆勒汽车有限公司 V-type distance rod testing stand

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109668743A (en) * 2019-02-26 2019-04-23 北京福田戴姆勒汽车有限公司 V-type distance rod testing stand

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