CN104101534A - Engine crankshaft fatigue test fixture - Google Patents

Engine crankshaft fatigue test fixture Download PDF

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Publication number
CN104101534A
CN104101534A CN201410338129.3A CN201410338129A CN104101534A CN 104101534 A CN104101534 A CN 104101534A CN 201410338129 A CN201410338129 A CN 201410338129A CN 104101534 A CN104101534 A CN 104101534A
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CN
China
Prior art keywords
fatigue test
engine crankshaft
spring plate
steel spring
loading
Prior art date
Application number
CN201410338129.3A
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Chinese (zh)
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CN104101534B (en
Inventor
李荣富
傅银泽
夏志豪
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上汽通用五菱汽车股份有限公司
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Priority to CN201410338129.3A priority Critical patent/CN104101534B/en
Publication of CN104101534A publication Critical patent/CN104101534A/en
Application granted granted Critical
Publication of CN104101534B publication Critical patent/CN104101534B/en

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Abstract

The invention relates to the field of engine fixtures, in particular to an engine crankshaft fatigue test fixture. The engine crankshaft fatigue test fixture comprises a support, a main fixture fixed on the support through bolts, a loading fixture block, a crank sample, a first spring steel plate, a connecting steel plate, a spring steel plate connecting support, a force sensor and a vibration head, wherein every two of the loading fixture block, the first spring steel plate, the connecting steel plate, a second spring steel plate, the spring steel plate connecting support, the force sensor and the vibration head are in hard connection and located on the same straight line; and the crank sample is connected with the loading fixture block, and a main journal cover and a connecting rod cover are fixed on the main fixture. According to the engine crankshaft fatigue test fixture, the tooling structure is simplified, the loading stressing is more direct in the crank position, the loading force can be conveniently and accurately calculated according to torque loading requirements of the sample, the system rigidity and the loading frequency are improved, the test time is shortened, and the working efficiency is improved.

Description

A kind of engine crankshaft fatigue test clamper
Technical field
The present invention relates to engine fixture field, relate in particular to a kind of engine crankshaft fatigue test clamper.
Background technology
Fixture suspender is originally too complicated, by hanger bar, main clamp and crank throw exemplar are suspended on to a side of bearing, vibration head linking springs steel plate, steel spring plate is connected with main clamp, as shown in Figure 1, the bang path of power is: vibration head-steel spring plate connects bearing-steel spring plate-main clamp-crank throw exemplar.Such device, according to moment conservation, will there is cyclical variation in the moment that crank throw exemplar is subject to along with moving up and down of vibration head; there is nonlinear decay in transmittance process; therefore, in order to ensure test accurately, need to before every batch of test, to data, calibrate; And because main clamp is connected on clamp mount through hanger bar, the rigidity of whole system is lower, thereby cause loading frequency lower.Above 2 have all been reduced to a certain extent test efficiency, have extended test period.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, a kind of engine crankshaft fatigue test clamper is provided, this fixture is for simplifying tool structure, and Optimized loading path, improves system stiffness.
The present invention passes through by the following technical solutions, the invention provides a kind of engine crankshaft fatigue test clamper, comprise bearing and main clamp, main clamp is bolted on bearing, also comprise loading fixture block, crank throw exemplar, the first steel spring plate, junction steel plate, steel spring plate connects bearing, power sensor, vibration head, described loading fixture block, the first steel spring plate, junction steel plate, the second steel spring plate, steel spring plate connects bearing, power sensor, vibration head connects and between two firmly all on same straight line, described crank throw exemplar is connected soon with described loading clamp, described king journal lid and described connecting rod cap are fixed on described main clamp.
As a further improvement on the present invention, the connecting rod neck of described crank throw exemplar and bent axle neck are fixed on described main clamp by described main clamp bearing cap, and another bent axle neck is connected soon with described loading clamp.
As a further improvement on the present invention, described fixture also comprises connecting rod neck examination point, and described connecting rod neck examination point is positioned on described crank throw exemplar and is positioned at the below of described connecting rod neck.
As a further improvement on the present invention, the bottom that described steel spring plate connects bearing is isosceles trapezoid, and the bottom of this isosceles trapezoid is stair shape.
As a further improvement on the present invention, the centre of described steel spring plate connection rest base is isosceles trapezoid.
As a further improvement on the present invention, it is L-type that described steel spring plate connects bearing, and one side is trapezoidal.
As a further improvement on the present invention, described trapezoidal be middle hollow out, the trapezoidal of a circular hole arranged at bottom.
As a further improvement on the present invention, the thickness of described steel spring plate is 2.5mm.
As a further improvement on the present invention, the thickness of described junction steel plate is 10mm.
As a further improvement on the present invention, described power sensor is diameter 150mm, the cylinder of high 42mm.
The invention has the beneficial effects as follows: owing to having cancelled hanger bar, directly one end main bearing journal is fixed in frock, has simplified tool structure, make the loading at crank throw place stressed more direct, can be convenient, according to exemplar loading moment, require to calculate loading force accurately.The analysis of test findings is easier, and conclusion (of pressure testing) is more accurate; New frock major part is all hard link, has improved system stiffness, therefore can improve the frequency of loading, has shortened test period, has promoted work efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of available engine crankshaft fatigue test fixture;
Fig. 2 is the structural representation of engine crankshaft fatigue test clamper of the present invention;
Fig. 3 is the cut-open view of available engine crankshaft fatigue test fixture;
Fig. 4 is that the steel spring plate of engine crankshaft fatigue test clamper of the present invention connects seat structure schematic diagram;
Fig. 5 is the structural drawing of the junction steel plate of engine crankshaft fatigue test clamper of the present invention;
Fig. 6 is the structural representation that the steel spring plate of engine crankshaft fatigue test clamper of the present invention connects bearing.
Embodiment
Below in conjunction with accompanying drawing explanation and embodiment, the present invention is further described.
Numeral in figure: 1, bearing; 2, main clamp; 3, king journal lid; 4, connecting rod cap; 5, load fixture block; 6, crank throw exemplar; 7, the first steel spring plate; 8, junction steel plate; 9, steel spring plate connects bearing; 10, power sensor; 11, vibration head; 12, connecting rod neck examination point; 13, the second steel spring plate; 20, hanger bar.
As shown in Fig. 2, Fig. 3, Fig. 5, because existing tool structure exists some flaws, redesign whole frock, cancelled hanger bar 20, main clamp 2 is directly fixed on bearing 1 by bolt, the connecting rod neck of crank throw exemplar 6 and a bent axle neck are fixed on main clamp by main clamp bearing cap, another maneton is connected with loading fixture block 5, with load first steel spring plate 7 that is followed successively by that fixture block 5 is connected, junction steel plate 8, the second steel spring plates 13, steel spring plate connects bearing 9, power sensor 10, vibration head 11.
As Fig. 2, Fig. 3, Fig. 4, shown in Fig. 5, the invention provides a kind of engine crankshaft fatigue test clamper, comprise bearing 1 and main clamp 2, main clamp 2 is bolted on bearing, comprise and load fixture block 5, crank throw exemplar 6, the first steel spring plate 7, junction steel plate 8, steel spring plate connects bearing 9, power sensor 10, vibration head 11, described loading fixture block 5, the first steel spring plate 7, junction steel plate 8, the second steel spring plate 13, steel spring plate connects bearing 9, power sensor 10, vibration head 11 is hard connect and all on same straight line between two, described crank throw exemplar 6 is connected soon with described loading clamp, described king journal lid 3 and described connecting rod cap 4 are fixed on described main clamp 2.Described power sensor 10 is diameter 150mm, the cylinder of high 42mm.Simplified tool structure; The bang path of power is: vibration head 11-power sensor 10-steel spring plate connects bearing 9-steel spring plate-junction steel plate 8-steel spring plate-loading fixture block 5-crank throw exemplar 6, although the parts of power process are more, but these parts all point-blank, and between each parts, be all hard connection, so the moment loading can directly be loaded into connecting rod neck examination point 12, thereby has optimized load path.Because whole system only has loading end unfixing, therefore also improved system stiffness.
As shown in Figure 2, the connecting rod neck of described crank throw exemplar 6 and bent axle neck are fixed on described main clamp 2 by described main clamp 2 bearing caps, and another bent axle neck is connected soon with described loading clamp.
As shown in Figure 2, described fixture also comprises connecting rod neck examination point 12, and described connecting rod neck examination point 12 is positioned on described crank throw exemplar 6 and is positioned at the below of described connecting rod neck.
As shown in Figure 2, described junction steel plate 8 is of a size of 80*55*10mm.
As shown in Figure 5, described steel spring plate is of a size of 50*55*2.5mm.
As shown in Figure 6, the centre of described steel spring plate connection bearing 9 bottoms is isosceles trapezoid.
As shown in Figure 6, the bottom that described steel spring plate connects bearing 9 is isosceles trapezoid, and the bottom of this isosceles trapezoid is stair shape.
As shown in Figure 6, it is L-type that described steel spring plate connects bearing, and one side is trapezoidal.
As shown in Figure 6, described trapezoidal be middle hollow out, the trapezoidal of a circular hole arranged at bottom.
The rigidity of whole new chucking appliance system is improved, therefore the frequency that testing machine loads can be increased to 50Hz from 40Hz, and the test period of one-piece part tapered to 55 hours from 70 hours, had reduced 21%, greatly improved test efficiency, saved stand resource and reduced equipment energy consumption.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.

Claims (10)

1. an engine crankshaft fatigue test clamper, comprise bearing and main clamp, main clamp is bolted on bearing, it is characterized in that: also comprise loading fixture block, crank throw exemplar, the first steel spring plate, junction steel plate, steel spring plate connects bearing, power sensor, vibration head, described loading fixture block, the first steel spring plate, junction steel plate, the second steel spring plate, steel spring plate connects bearing, power sensor, vibration head connects and between two firmly all on same straight line, described crank throw exemplar is connected soon with described loading clamp, described king journal lid and described connecting rod cap are fixed on described main clamp.
2. engine crankshaft fatigue test clamper according to claim 1, is characterized in that: the connecting rod neck of described crank throw exemplar and bent axle neck are fixed on described main clamp by described main clamp bearing cap, and another bent axle neck is connected soon with described loading clamp.
3. engine crankshaft fatigue test clamper according to claim 1, is characterized in that: described fixture also comprises connecting rod neck examination point, and described connecting rod neck examination point is positioned on described crank throw exemplar and is positioned at the below of described connecting rod neck.
4. engine crankshaft fatigue test clamper according to claim 1, is characterized in that: the bottom that described steel spring plate connects bearing is isosceles trapezoid, and the bottom of this isosceles trapezoid is stair shape.
5. engine crankshaft fatigue test clamper according to claim 4, is characterized in that: the centre that described steel spring plate connects rest base is isosceles trapezoid.
6. engine crankshaft fatigue test clamper according to claim 1, is characterized in that: it is L-type that described steel spring plate connects bearing, and one side is trapezoidal.
7. engine crankshaft fatigue test clamper according to claim 6, is characterized in that: described trapezoidal be middle hollow out, the trapezoidal of a circular hole arranged at bottom.
8. engine crankshaft fatigue test clamper according to claim 7, is characterized in that: the thickness of described steel spring plate is 2.5mm.
9. engine crankshaft fatigue test clamper according to claim 1, is characterized in that: the thickness of described junction steel plate is 10mm.
10. engine crankshaft fatigue test clamper according to claim 1, is characterized in that: described power sensor is diameter 150mm, the cylinder of high 42mm.
CN201410338129.3A 2014-07-16 2014-07-16 A kind of engine crankshaft fatigue test clamper CN104101534B (en)

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Application Number Priority Date Filing Date Title
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CN104101534B CN104101534B (en) 2018-02-27

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105388008A (en) * 2015-12-14 2016-03-09 中国北方发动机研究所(天津) Large-bore engine crankshaft asymmetric bending fatigue test method
CN105699180A (en) * 2014-11-28 2016-06-22 上海汽车集团股份有限公司 A fatigue test clamp
CN107179193A (en) * 2017-06-02 2017-09-19 中国北方发动机研究所(天津) Adjustable adaptive Crankshaft Bend Fatigue Test device
CN109100216A (en) * 2018-09-17 2018-12-28 江西洪都航空工业集团有限责任公司 A kind of missile block hanging load tool structure

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105699180A (en) * 2014-11-28 2016-06-22 上海汽车集团股份有限公司 A fatigue test clamp
CN105388008A (en) * 2015-12-14 2016-03-09 中国北方发动机研究所(天津) Large-bore engine crankshaft asymmetric bending fatigue test method
CN105388008B (en) * 2015-12-14 2018-11-06 中国北方发动机研究所(天津) A kind of large bore engine bent axle asymmetric curvature fatigue test method
CN107179193A (en) * 2017-06-02 2017-09-19 中国北方发动机研究所(天津) Adjustable adaptive Crankshaft Bend Fatigue Test device
CN109100216A (en) * 2018-09-17 2018-12-28 江西洪都航空工业集团有限责任公司 A kind of missile block hanging load tool structure

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