CN106872301A - A kind of drive disk gear ring fatigue experimental device - Google Patents
A kind of drive disk gear ring fatigue experimental device Download PDFInfo
- Publication number
- CN106872301A CN106872301A CN201710232370.1A CN201710232370A CN106872301A CN 106872301 A CN106872301 A CN 106872301A CN 201710232370 A CN201710232370 A CN 201710232370A CN 106872301 A CN106872301 A CN 106872301A
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- China
- Prior art keywords
- drive disk
- lever
- gear ring
- experimental device
- fatigue experimental
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Classifications
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
-
- 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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/307—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means
-
- 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)
- 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)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a kind of drive disk gear ring fatigue experimental device, including driving the structures such as disc carrier, hydraulic support, lever, power set, wherein driving disc carrier for vertical fixed drive disk；Hydraulic support is arranged at the side for driving disc carrier, rotates the horizontally disposed lever of connection, and one end of lever applies vertical active force to the gear ring of drive disk side；Power set apply vertical reciprocating forces to the other end of lever.At the trial, power set reciprocating vertical motion, presses lever is rotated by a small margin, and the other end of lever applies reciprocal impact to the gear ring of drive disk side, simulates actual starting state.Drive disk is maintained static, and lever once only applies impact to a tooth, after impacting certain number of times, adjusts the angle of drive disk, and another tooth is applied to impact, and repeats to test three teeth, finally detects the state of drive disk.
Description
Technical field
The present invention relates to testing equipment technical field, a kind of drive disk gear ring fatigue experimental device is further related to.
Background technology
The drive disk of automobile is the important component of engine start, and the side of drive disk card is connected to the bent axle of engine
On, opposite side is connected on fluid torque-converter；The periphery of drive disk is provided with gear ring, can be protected with the little gear for starting motor output end
Hold engagement；When starting the engine, start motor and drive little gear rotation, and then turn the bent axle of engine and fluid torque-converter
Dynamic, engine oil, spark ignitor automobile keeps normal working of engine.
Drive disk band dynamic crankshaft in automobile starting rotates, and engine rotation is worked by the state of static, therefore
Moment of startup starts motor and applies huge impact to the gear of drive disk, with using for a long time, the gear ring of drive disk
The situation damaged and fracture is likely to occur, particularly after long-time is used for multiple times, the probability of damage is higher.
Vehicle needs to keep high reliability to run, therefore in order to ensure the security of drive disk, needs to carry out before dispatching from the factory
Detection；For a person skilled in the art, a kind of device for detecting drive disk gear ring shock resistance situation how is designed,
It is the current technical issues that need to address.
The content of the invention
The present invention provides a kind of drive disk gear ring fatigue experimental device, for detecting drive disk gear ring shock resistance situation, tool
Body scheme is as follows：
A kind of drive disk gear ring fatigue experimental device, including：
Disc carrier is driven, for vertical fixed drive disk；
Hydraulic support, is arranged at the side of the driving disc carrier；
Lever, is rotationally horizontally placed on the hydraulic support, the tooth of one end of the lever to drive disk side
Circle applies vertical active force；
Power set, the other end to the lever applies vertical reciprocating forces.
Alternatively, the gear supporting plate that the hydraulic support includes two pieces vertically and be arranged in parallel, the gear supporting plate
Upper relative position sets bearing, and the two ends of torque axis are rotated with the gear supporting plate by the bearing be connected respectively.
Alternatively, the lever includes being formed double branches and single branch of Y-shaped, and the torque axis is through described double points
Branch.
Alternatively, the little gear for setting and being engaged with the gear ring of drive disk, the little gear are welded and fixed on the torque axis
Between two described pair of branches；The torque axis is welded and fixed with the lever.
Alternatively, the groove coordinated with the power set is provided at the top of single branch；The power set
Bottom set and the projection of the groove fit.
Alternatively, the power set are vertically arranged guide post including two, and being horizontally disposed with the guide post being capable of edge
The mounting bracket that the guide post is slided, the hydraulic cylinder that setting can stretch downwards on the mounting bracket, the hydraulic cylinder can be by
Press the lever.
Alternatively, the driving disc carrier includes two pieces of drive disk supporting plates for being vertically arranged and being parallel to each other；Two pieces of institutes
State to be installed in drive disk supporting plate and can be plugged in the fixing axle of drive disk central through hole, hassock is set with successively in the fixing axle
Piece, drive disk and shim liner, the hassock piece and the shim liner by drive disk be clamped in two pieces of drive disk supporting plates it
Between.
Alternatively, the driving disc carrier and the hydraulic support are mounted by means of bolts on base plate.
The invention provides a kind of drive disk gear ring fatigue experimental device, including drive disc carrier, hydraulic support, lever,
The structures such as power set, wherein driving disc carrier for vertical fixed drive disk；Hydraulic support is arranged at and drives the one of disc carrier
Side, rotates the horizontally disposed lever of connection, and one end of lever applies vertical active force to the gear ring of drive disk side；Power set
The other end to lever applies vertical reciprocating forces.At the trial, power set reciprocating vertical motion, presses lever is small size
Degree is rotated, and the other end of lever applies reciprocal impact to the gear ring of drive disk side, simulates actual starting state.Drive disk
Maintain static, lever once only applies impact to a tooth, after impacting certain number of times, the angle of drive disk is adjusted, to another
Tooth applies impact, repeats to test three teeth, finally detects the state of drive disk.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the front view of drive disk gear ring fatigue experimental device of the present invention；
Fig. 2 is the top view of drive disk gear ring fatigue experimental device of the present invention；
Fig. 3 A are the front view of lever；
Fig. 3 B are the top view of lever；
Fig. 4 A are the front view of drive disk；
Fig. 4 B are the side view of drive disk.
Including：
Drive disc carrier 1, drive disk supporting plate 11, hassock piece 12, shim liner 13, fixing axle 14, hydraulic support 2, gear
Supporting plate 21, torque axis 22, bearing 23, little gear 24, base plate 3, lever 4, double branches 41, single branch 42.
Specific embodiment
Core of the invention is to provide a kind of drive disk gear ring fatigue experimental device, for detecting drive disk gear ring anti-impact
Hit situation.
In order that those skilled in the art more fully understands technical scheme, below in conjunction with accompanying drawing and specifically
Implementation method, the drive disk gear ring fatigue experimental device to the application is described in detail explanation.
As depicted in figs. 1 and 2, the front view and vertical view of the drive disk gear ring fatigue experimental device for providing respectively of the invention
Figure, Fig. 4 A and Fig. 4 B represents the front view and side view of drive disk respectively, and wherein A represents driving disc assembly.The device includes：Drive
The structures such as Moving plate support 1, hydraulic support 2, lever 4, power set, drive disc carrier 1 to be used for vertical fixed drive disk；Pressure branch
Frame 2 is arranged at the side for driving disc carrier 1, for side mentioned here refers to the gear ring along drive disk, is i.e. driven in Fig. 1
The left side or right side of disk；Lever 4 is rotationally horizontally placed on hydraulic support 2, the tooth of one end of lever 4 to drive disk side
Circle applies vertical active force, and one end stress of lever 4 is rotated by a small margin, and when the side of lever 4 declines, the other end then rises, right
Drive disk applies impulsive force；Power set, the other end to lever 4 applies vertical reciprocating forces, and power set are in accompanying drawing
Not shown in.
The core of the application is, by lever principle, the impulsive force of power set to be applied into drive disk, such scheme
Lever 4 is horizontally disposed with, in the core concept of the application, lever 4 can also be vertically arranged or arbitrarily angled with other
Set；Or drive disk is horizontally disposed with, the setting angle of power set is correspondingly adjusted, as long as impact can be applied into drive
Moving plate.
At the trial, drive disk is fixed on driving disc carrier 1, drive disk keeps vertical, one of drive disk gear ring
Teeth keep engaging with the corresponding construction on lever 4；Power set are then turned on, reciprocal vertical active force are applied to lever 4,
The opposite side circulation of lever 4 applies impact to the gear ring of drive disk, and a certain random teeth are repeated with the impact of certain number of times；So
The angle of drive disk being adjusted afterwards and being retightened, same impact is repeated to another teeth；Whole process of the test at least chooses three
Individual tooth is impacted；The state of drive disk is detected after the completion of experiment.
Specifically, the hydraulic support 2 in the application includes two pieces of gear supporting plates 21 being vertically arranged, two pieces of gear branch
Fagging 21 is parallel to each other, and position relative in gear supporting plate 21 sets bearing 23, and torque axis 22, two are inserted in two groups of bearings 23
End is rotated with gear supporting plate 21 by bearing 23 be connected respectively, and the frictional dissipation of torque axis 22 is reduced by bearing 23.
In order to improve the intensity of lever 4, lever 4 is set to Y-shaped, is made up of with single branch 42 double branches 41, such as Fig. 3 A
With shown in Fig. 3 B, the respectively front view and top view of lever 4；Double branches 41 are mutually perpendicular to single branch 42, Liang Geshuan branches
41 is arranged in parallel, and through hole is opened up in double branches 42, is inserted for torque axis 22, and the structure of Liang Geshuan branches 41 is not only carried
The intensity of lever 4 high, also improves the stability of lever 4, will not be rocked to side in rotation process.
Little gear 24 is welded and fixed on torque axis 22, little gear 24 is engaged with the gear ring of drive disk, little gear 24 is located at two
Between Ge Shuan branches 41, torque axis 22 is with lever 4 by being welded and fixed.During assembling, little gear 24 and lever 4 are first passed through into moment of torsion
Axle 22 is inserted to two gear supporting plates 21 after completing to install, then little gear 24, lever 4 and torque axis 22 are welded and fixed.
The top of single branch 42 is provided for the groove coordinated with power set, and the bottom of power set is set matches somebody with somebody with groove
The projection of conjunction, the groove in Fig. 3 B is set to " one " font, and groove can be positioned to the impact position of power set, while
The contact area with lever 4 can be increased, so as to reduce the impact suffered by lever 4 itself.
Power set are vertically arranged guide post including two, and the installation that can be slided along guide post is horizontally disposed with guide post
Frame, the hydraulic cylinder that setting can stretch downwards on mounting bracket, by hydraulic cylinder presses lever 4.Mounting bracket can be on the guide bar
Slide, and fixed in specific position, so as to adjust the vertical height of hydraulic cylinder.
In any of the above-described technical scheme and its on the basis of being mutually combined, drive disc carrier 1 be vertically arranged including two pieces and
The drive disk supporting plate 11 being parallel to each other；Fixing axle 14 is installed, fixing axle 14 is plugged in driving in two pieces of drive disk supporting plates 11
The central through hole of disk；Hassock piece 12, drive disk and shim liner 13 are set with fixing axle 14 successively, hassock piece 12 and shim liner 13 will
Drive disk is clamped between two pieces of drive disk supporting plates 11, because the gear ring of drive disk protrudes to side plate face, therefore is provided with
The different pad of two pieces of thickness, makes drive disk supporting plate 11 avoid the gear ring of periphery；Fixing axle 14 is bolt, by nut by thickness
Pad 12 and shim liner 13 press fixation.
Disc carrier 1 and hydraulic support 2 is driven to be mounted by means of bolts on base plate 3, in the He of drive disk supporting plate 11
The both sides of gear supporting plate 21 each extend over setting fixed lobe, and bolt fixing hole is set in projection.Driving in the application
Disk supporting plate 11 and gear supporting plate 21 are up-small and down-big structure, and top is set to circular arc；Fixing axle 14 and lever 4
Level height is identical, and lever 4 acts on the side of fixing axle 14.
Choose three teeth during operation to be tested, the load of applying is 3.5kN, and imposed load is according to engine design requirement
Adjust accordingly, 80000 load are applied to the circulation of each tooth, test number (TN) is accordingly adjusted according to engine design requirement
Whole, three teeth occur without broken teeth or structural damage phenomenon for qualified, can not to carry out magnetic particle testing after the completion of experiment
There is crack defect.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle, can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore, this hair
It is bright to be not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase
Consistent scope most wide.
Claims (8)
1. a kind of drive disk gear ring fatigue experimental device, it is characterised in that including：
Disc carrier (1) is driven, for vertical fixed drive disk；
Hydraulic support (2), is arranged at the side of driving disc carrier (1)；
Lever (4), is rotationally horizontally placed on the hydraulic support (2), and one end of the lever (4) is to drive disk side
Gear ring apply vertical active force；
Power set, the other end to the lever (4) applies vertical reciprocating forces.
2. drive disk gear ring fatigue experimental device according to claim 1, it is characterised in that hydraulic support (2) bag
The gear supporting plate (21) for including two pieces vertically and be arrangeding in parallel, position relative on the gear supporting plate (21) sets bearing
(23), the two ends of torque axis (22) are rotated with the gear supporting plate (21) by the bearing (23) be connected respectively.
3. drive disk gear ring fatigue experimental device according to claim 2, it is characterised in that the lever (4) is including shape
Double branches (41) and single branch (42) into Y-shaped, the torque axis (22) is through described pair of branch (41).
4. drive disk gear ring fatigue experimental device according to claim 3, it is characterised in that welded on the torque axis (22)
The little gear (24) for being fixedly installed and being engaged with the gear ring of drive disk is connect, the little gear (24) is positioned at two described pair of branches (41)
Between；The torque axis (22) is welded and fixed with the lever (4).
5. drive disk gear ring fatigue experimental device according to claim 4, it is characterised in that the top of single branch (42)
Portion is provided for the groove coordinated with the power set；The bottom of the power set sets convex with the groove fit
Block.
6. drive disk gear ring fatigue experimental device according to claim 5, it is characterised in that the power set include two
Root is vertically arranged guide post, and the mounting bracket that can be slided along the guide post, the mounting bracket are horizontally disposed with the guide post
The hydraulic cylinder that upper setting can stretch downwards, the hydraulic cylinder can press the lever (4).
7. the drive disk gear ring fatigue experimental device according to any one of claim 1 to 6, it is characterised in that the driving
The drive disk supporting plate (11) that disc carrier (1) is vertically arranged and is parallel to each other including two pieces；Two pieces of drive disk supporting plates
(11) being installed on can be plugged in the fixing axle (14) of drive disk central through hole, and hassock piece is set with successively on the fixing axle (14)
(12), drive disk and shim liner (13), be clamped in drive disk described in two pieces by the hassock piece (12) and the shim liner (13)
Between drive disk supporting plate (11).
8. drive disk gear ring fatigue experimental device according to claim 7, it is characterised in that the driving disc carrier (1)
It is mounted by means of bolts on base plate (3) with the hydraulic support (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232370.1A CN106872301B (en) | 2017-04-11 | 2017-04-11 | Driving disc gear ring fatigue test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232370.1A CN106872301B (en) | 2017-04-11 | 2017-04-11 | Driving disc gear ring fatigue test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106872301A true CN106872301A (en) | 2017-06-20 |
| CN106872301B CN106872301B (en) | 2023-09-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710232370.1A Active CN106872301B (en) | 2017-04-11 | 2017-04-11 | Driving disc gear ring fatigue test device |
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| Country | Link |
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| CN (1) | CN106872301B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3176533A (en) * | 1959-01-27 | 1965-04-06 | Durand Francois | Device for driving large-sized gear rings |
| JPH0257939A (en) * | 1988-08-24 | 1990-02-27 | Railway Technical Res Inst | Power circulating type gear load tester |
| CN200979487Y (en) * | 2006-12-07 | 2007-11-21 | 重庆聚能粉末冶金有限公司 | An impact testing device |
| CN203396544U (en) * | 2013-08-21 | 2014-01-15 | 内蒙古第一机械集团有限公司 | Lever type bevel gear ring bouncing detection apparatus |
| CN104764658A (en) * | 2015-04-21 | 2015-07-08 | 郑州机械研究所 | Gear single-tooth loading testing device with uniform loading function |
| CN204461725U (en) * | 2015-02-02 | 2015-07-08 | 重庆工业职业技术学院 | Automobile push button switch fatigue test unit |
| CN204944839U (en) * | 2015-07-26 | 2016-01-06 | 华东交通大学 | Rolling bearing fatigue life testing table |
| CN205374031U (en) * | 2016-03-07 | 2016-07-06 | 四川建筑职业技术学院 | A axial tension or pressure driven ware for fatigue test |
| CN106441776A (en) * | 2016-11-23 | 2017-02-22 | 上海汽车齿轮三厂 | Gear impact fatigue detection device |
| CN205981677U (en) * | 2016-07-22 | 2017-02-22 | 浙江丰立机电有限公司 | Gear fatigue life testing machine |
| CN206862800U (en) * | 2017-04-11 | 2018-01-09 | 重庆光昊机械有限公司 | A kind of drive disk gear ring fatigue experimental device |
-
2017
- 2017-04-11 CN CN201710232370.1A patent/CN106872301B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3176533A (en) * | 1959-01-27 | 1965-04-06 | Durand Francois | Device for driving large-sized gear rings |
| JPH0257939A (en) * | 1988-08-24 | 1990-02-27 | Railway Technical Res Inst | Power circulating type gear load tester |
| CN200979487Y (en) * | 2006-12-07 | 2007-11-21 | 重庆聚能粉末冶金有限公司 | An impact testing device |
| CN203396544U (en) * | 2013-08-21 | 2014-01-15 | 内蒙古第一机械集团有限公司 | Lever type bevel gear ring bouncing detection apparatus |
| CN204461725U (en) * | 2015-02-02 | 2015-07-08 | 重庆工业职业技术学院 | Automobile push button switch fatigue test unit |
| CN104764658A (en) * | 2015-04-21 | 2015-07-08 | 郑州机械研究所 | Gear single-tooth loading testing device with uniform loading function |
| CN204944839U (en) * | 2015-07-26 | 2016-01-06 | 华东交通大学 | Rolling bearing fatigue life testing table |
| CN205374031U (en) * | 2016-03-07 | 2016-07-06 | 四川建筑职业技术学院 | A axial tension or pressure driven ware for fatigue test |
| CN205981677U (en) * | 2016-07-22 | 2017-02-22 | 浙江丰立机电有限公司 | Gear fatigue life testing machine |
| CN106441776A (en) * | 2016-11-23 | 2017-02-22 | 上海汽车齿轮三厂 | Gear impact fatigue detection device |
| CN206862800U (en) * | 2017-04-11 | 2018-01-09 | 重庆光昊机械有限公司 | A kind of drive disk gear ring fatigue experimental device |
Non-Patent Citations (2)
| Title |
|---|
| 周栋;吴慧勇;: "基于杠杆原理的起落架疲劳试验随动加载装置分析", 飞机设计, no. 01, pages 20 - 22 * |
| 魏来生;马立刚;景毅;: "机械式扭转疲劳试验装置的仿真分析", 系统仿真技术, no. 04, pages 247 - 250 * |
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| Publication number | Publication date |
|---|---|
| CN106872301B (en) | 2023-09-19 |
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