CN102445353A - Mechanical simple harmonic excitation device - Google Patents
Mechanical simple harmonic excitation device Download PDFInfo
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- CN102445353A CN102445353A CN2011103072135A CN201110307213A CN102445353A CN 102445353 A CN102445353 A CN 102445353A CN 2011103072135 A CN2011103072135 A CN 2011103072135A CN 201110307213 A CN201110307213 A CN 201110307213A CN 102445353 A CN102445353 A CN 102445353A
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Abstract
The invention discloses a mechanical simple harmonic excitation device, which comprises a driving shaft, a circular disc, an eccentric shaft, an excitation ring, a bearing pair, an excitation shaft, a bearing sleeve and a base, wherein the circular disc is coaxially connected with the driving shaft; the eccentric shaft and the circular disc are arranged eccentrically; the excitation ring is provided with a through kidney-shaped slotted hole; the kidney-shaped slotted hole is contacted with the bearing pair arranged on the eccentric shaft; the excitation ring is fixedly connected with the excitation shaft into a whole through a screw and a taper pin; and the excitation shaft is arranged in the base which is provided with the bearing sleeve inside and an end cover above. The mechanical simple harmonic excitation device has a simple structure; the excitation shaft and the excitation ring are detachably integrated, so that the structural height is reduced; and the mechanical simple harmonic excitation device has the characteristics of relatively light weight of a vertical moving component and low cost.
Description
Technical field
The present invention relates to a kind of mechanical exciting device, the mechanical type harmonic excitation device of using in particular for the ride-control performance test.
Background technology
Vehicle shock absorber test-bed requirement provides by the simple harmonic quantity of fixing speed and amplitude (sine) exciting function, and the company that produces such testing table abroad all adopts based on the hydraulic servo oil cylinder of hydraulic efficiency servo-valve control and realizes sine excitation, like American MTS and Britain Inston.But the testing table cost based on Hydraulic Servo Control is high, and especially imported hydraulic servo test platform price is expensive more.For a long time; It is simple that the damper test stand of domestic-developed adopt slider-crank mechanism to be similar to usually to replace sine mechanism, this alternative advantage, and shortcoming is to have introduced kinematic error; When length of connecting rod and crank length ratio were 10, the kinematic error of introducing was about 5%.In addition, because connecting rod is done the Planar Compound motion, its barycenter acceleration and angular acceleration can cause periodic vibration force and moment, the wearing and tearing and the fatigue failure of meeting acceleration means.Why present most testing table does not directly adopt sine mechanism but comes approximate substitution with slider-crank mechanism, and reason is that the traditional mechanical sine mechanism is introduced sliding friction, and there is gap and easy to wear and influence serviceable life in sliding pair.
Domestic in recent years have unit to begin to develop the mechanical type Sine Driving Mechanism; Patent of invention " rolling friction sine mechanism " (ZL200610050331.1) and patent of invention " a kind of adopt the vehicle shock absorber test-bed of sinusoidal device " (application number: 201010122290.9) disclose a kind of pure rolling friction sine mechanism; It adopts the straight-line rolling guide set of standard to replace the sliding pair of traditional sine mechanism, the problem of having avoided the sliding pair sine mechanism to exist.But this mechanism's link is more, and heavy moving parts is big and cost is higher.
Summary of the invention
The objective of the invention is in order to overcome the existing in prior technology defective, a kind of mechanical type harmonic excitation device simple in structure is provided.
In order to reach above-mentioned purpose, the present invention realizes that the technical scheme that purpose adopts is:
A kind of mechanical type harmonic excitation device comprises driving shaft 13, disk 5, excentric shaft 9, exciting ring 6, bearing pair 7, vibrating shaft 1, bearing holder (housing, cover) 4 and support 3; Said disk 5 and 13 coaxial connections of driving shaft; Said excentric shaft 9 and disk 5 eccentric installations; Said exciting ring 6 is provided with the kidney slot hole 6a of a perforation; Said kidney slot hole 6a contacts with bearing pair 7 on being installed in excentric shaft 9; Said exciting ring 6 is solidly fixed through screw 10 and taper bolt 11 and said vibrating shaft 1, is provided with bearing holder (housing, cover) 4 in described vibrating shaft 1 is placed in and is provided with in the support 3 of end cap 2.
Kidney slot hole 6a on the above-mentioned described exciting ring 6 be by about two semicircle orifices and last plane 6b and two tangent forming of parallel plane of lower plane 6c; Plane 6b rear side is provided with for 1/2 1 sections and lifts face 6d on one on said, and 1/2 1 sections are provided with a surface of subsidence 6e before said lower plane 6c.
Above-mentioned described bearing pair 7 is made up of two front bearing 7a and rear bearing 7b that are sleeved on the excentric shaft 9; Between said front bearing 7a and the rear bearing 7b inner ring inner spacing collar 12 is set; Said front bearing 7a outer ring contacts with the said plane 6b that goes up, and said rear bearing 7b contacts with said lower plane 6c.
Have annular groove one 4a and annular groove two 4c on also on above-mentioned said bearing holder (housing, cover) 4 inner hole walls, link to each other through helicla flute 4b between said annular groove one 4a and annular groove two 4c.
A kind of mechanical type harmonic excitation device of the present invention compared with prior art, its advantage and beneficial effect are mainly reflected in:
Innovation part of the present invention is to realize the sinusoidal regular movement of pure rolling with succinct structure; Promptly through monolateral separately stressed pair of bearings on horizontal loops slotted eye on the exciting ring and the excentric shaft; When making excentric shaft with the disk uniform rotation, bearing and exciting ring be up and down pure rolling friction between the surface of contact.
The invention has the beneficial effects as follows simple for structurely, vibrating shaft and exciting ring are dismountable integral structure, have reduced structure height, and vertical movement parts matter weight gentlier reaches the low characteristics of cost.
Description of drawings
Fig. 1 is a front elevation of the present invention;
Fig. 2 is the A-A cut-open view of Fig. 1;
Among the figure: 1, vibrating shaft, 2, end cap, 3, support, 4, bearing holder (housing, cover), 4a, annular groove one, 4b, helicla flute; 4c, annular groove two, 5, disk, 6, the exciting ring, plane, 6c, lower plane, are gone up at 6b in 6a, kidney slot hole; 6d, on lift face, 6e, surface of subsidence, 7, bearing pair, 7a, front bearing, 7b, rear bearing, 8, circlip; 9, excentric shaft, 10, screw, 11, taper bolt, 12, inner spacing collar, 13, driving shaft.
Embodiment
Being used for vehicle shock absorber test-bed through the present invention below is specific embodiment, and combines accompanying drawing, does further bright specifically to technical scheme of the present invention.
Embodiment:
Fig. 1 has represented the sine excitation mechanism that certain is vehicle shock absorber test-bed, comprises disk 5, excentric shaft 9, circlip 8, bearing pair 7, exciting ring 6, vibrating shaft 1, bearing holder (housing, cover) 4, support 3 and end cap 2; Excentric shaft 9 is connected fixing with disk 5 by desired eccentric distance e; Exciting ring 6 has two taper bolts, 11 location with vibrating shaft 1 and is solidly fixed with screw 10, makes the last lower plane (6b, 6c) of the kidney slot hole 6a of exciting ring 6 keep vertical with the axis C of vibrating shaft 1.
When disk 5 at the uniform velocity rotates; The center line B of excentric shaft 9 rotatablely moves by circular path D around disk 5 center line A; Driving vibrating shaft 1 through bearing pair 7 with exciting ring 6 pumps; At this moment the characteristics of motion of vibrating shaft 1 is for being the sinusoidal motion of radius with the eccentric distance e, and motional amplitude is 2 times of eccentric distance e.
Fig. 2 is the A-A cut-open view of Fig. 1, disk 5 and 13 coaxial connections of driving shaft, and driving shaft 13 adopts variable frequency reducer motor to drive, and is installed by bearings.The bearing pair 7 that is sleeved on excentric shaft 9 is made up of front bearing 7a and rear bearing 7b, and an inner spacing collar 12 is housed between two bearings, and front bearing 7a and rear bearing 7b are separated from each other, and is provided with spring collar 8 in excentric shaft 9 ends and makes the two bearings axial restraint.
Exciting ring 6 is provided with the kidney slot hole 6a that connects and contacts with bearing pair 7 on being installed in excentric shaft 9; For make two bearings when rotating with excentric shaft 9 and horizontally slipping relatively of exciting ring 6 be pure rolling; Kidney slot 6a shape to exciting ring 6 is handled, with front bearing 7a right lower plane 6c (1/2 width) process a bit of distance downwards, form surface of subsidence 6e; Front bearing 7a is broken away from contact, and only contact with last plane 6b with lower plane 6c; In like manner; With rear bearing 7b right last plane 6b (1/2 width) upwards process a bit of distance, lift face 6d in the formation, rear bearing 7b is broken away from contacts with last plane 6b; And only contact with lower plane 6c; And each bearing is monolateral the contact with kidney slot hole 6a, and promptly the outer ring of front bearing 7a contacts with last plane 6b, and the outer ring of rear bearing 7b contacts with lower plane 6c.Like this, when vibrating shaft 1 is up, by the front bearing 7a application of force, when vibrating shaft 1 is descending, by the rear bearing 7b application of force.Front and back bearings is born unidirectional load separately, bearing under loaded state and the upper and lower plane 6b of exciting ring mounting hole 6a, the relative motion between the 6c be pure rolling.
For slight interference cooperates, the effect of end cap 2 is retainer shaft bearing sleeve 4 axial restraints between bearing holder (housing, cover) 4 and the support 3.Keep good lubricated in order to make between bearing holder (housing, cover) 4 and the vibrating shaft 1, between cooperation be clearance fit, bearing holder (housing, cover) 4 materials adopt tin bronze 6-6-3 or other high-abrasive material; Respectively process annular groove one 4a and annular groove two 4c in bearing holder (housing, cover) 4 endoporus upper and lowers, and between two annular grooves, connect, play the trapped fuel effect with helicla flute 4b; Can make vibrating shaft 1 when pumping and between the endoporus of bearing holder (housing, cover) 4, produce oil film; Strengthen lubricant effect, reduce wear, improve serviceable life.
The wheel effect of taking off of the diameter of disk 5 design bigger, the moment of inertia that produces in the rotary course, the velocity variations that load fluctuation is produced can play stabilization.
For vibrating shaft 1 is not deflected, the anti-deflection device (omitting among the figure) of vibrating shaft should be set also in moving up and down.
The course of work is: drive driving shaft 13 uniform rotation by frequency control motor (omitting among the figure); Drive excentric shaft 9 through disk 5 and make eccentric rotary around disk 5 axis; Through being installed on bearing pair 7 on the excentric shaft 9, make it to produce sine excitation to being connected in vibrating shaft 1 application of force of one with exciting ring 6.
According to the characteristics of sine mechanism, when the bearing pair on the excentric shaft 97 during near exciting ring 6 right ends vertical speed maximum, the exciting force that is applied is maximum; And when bearing pair 7 is positioned at exciting ring 6 middle parts, be displacement break-in position, and speed is zero, institute is stressed also minimum.
Claims (4)
1. a mechanical type harmonic excitation device is characterized in that: comprise driving shaft (13), disk (5), excentric shaft (9), exciting ring (6), bearing pair (7), vibrating shaft (1), bearing holder (housing, cover) (4) and support (3); Said disk (5) and coaxial connection of driving shaft (13); Said excentric shaft (9) is installed with disk (5) is eccentric; Said exciting ring (6) is provided with the kidney slot hole (6a) of a perforation; Said kidney slot hole (6a) contacts with bearing pair (7) on being installed in excentric shaft (9); Said exciting ring (6) is solidly fixed through screw (10) and taper bolt (11) and said vibrating shaft (1), is provided with bearing holder (housing, cover) (4) in described vibrating shaft (1) is placed in and is provided with in the support (3) of end cap (2).
2. a kind of mechanical type harmonic excitation device according to claim 1; It is characterized in that: the kidney slot hole (6a) on the described exciting ring (6) be by about two semicircle orifices and last plane (6b) and two tangent forming of parallel plane of lower plane (6c); Plane (6b) rear side is provided with the face of lifting on (6d) for 1/2 1 sections on said, is provided with a surface of subsidence (6e) for preceding 1/2 1 sections at said lower plane (6c).
3. a kind of mechanical type harmonic excitation device according to claim 1; It is characterized in that: described bearing pair (7) is made up of two front bearing (7a) and rear bearings (7b) that are sleeved on the excentric shaft (9); Between said front bearing (7a) and rear bearing (7b) inner ring inner spacing collar (12) is set; Said front bearing (7a) outer ring contacts with the said plane (6b) of going up, and said rear bearing (7b) contacts with said lower plane (6c).
4. a kind of mechanical type harmonic excitation device according to claim 1; It is characterized in that: have annular groove one (4a) and annular groove two (4c) on also on said bearing holder (housing, cover) (4) inner hole wall, link to each other through helicla flute (4b) between said annular groove one (4a) and the annular groove two (4c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110307213.5A CN102445353B (en) | 2011-10-10 | 2011-10-10 | Mechanical simple harmonic excitation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110307213.5A CN102445353B (en) | 2011-10-10 | 2011-10-10 | Mechanical simple harmonic excitation device |
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| CN102445353A true CN102445353A (en) | 2012-05-09 |
| CN102445353B CN102445353B (en) | 2014-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110307213.5A Expired - Fee Related CN102445353B (en) | 2011-10-10 | 2011-10-10 | Mechanical simple harmonic excitation device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453118A (en) * | 2013-08-30 | 2013-12-18 | 湖北中烟工业有限责任公司 | Double-bearing over-positioning device |
| CN103551297A (en) * | 2013-11-18 | 2014-02-05 | 农业部规划设计研究院 | Amplitude adjustable vibration excitation device |
| CN105841905A (en) * | 2016-05-23 | 2016-08-10 | 中国工程物理研究院总体工程研究所 | Linear motion compensation device with characteristic of automatic center-alignment |
| CN107884291A (en) * | 2017-10-16 | 2018-04-06 | 太原理工大学 | A kind of rock axial direction sine and cosine adds unloading single axis test machines device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU721678A1 (en) * | 1977-10-11 | 1980-03-15 | Предприятие П/Я Г-4901 | Method and device for determining two components of mechanical oscillations of a structure |
| US20040077845A1 (en) * | 2001-02-20 | 2004-04-22 | Tatsuji Enoki | Modifier |
| CN201083616Y (en) * | 2007-09-11 | 2008-07-09 | 江苏科技大学 | Simple harmonic excitation test stand |
| CN101761387A (en) * | 2010-01-11 | 2010-06-30 | 张传德 | Flywheel simple harmonic motion four-stroke engine |
| CN102125910A (en) * | 2010-12-07 | 2011-07-20 | 南京工程学院 | Amplitude and energy adjustable mechanical random vibration exciting device |
-
2011
- 2011-10-10 CN CN201110307213.5A patent/CN102445353B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU721678A1 (en) * | 1977-10-11 | 1980-03-15 | Предприятие П/Я Г-4901 | Method and device for determining two components of mechanical oscillations of a structure |
| US20040077845A1 (en) * | 2001-02-20 | 2004-04-22 | Tatsuji Enoki | Modifier |
| CN201083616Y (en) * | 2007-09-11 | 2008-07-09 | 江苏科技大学 | Simple harmonic excitation test stand |
| CN101761387A (en) * | 2010-01-11 | 2010-06-30 | 张传德 | Flywheel simple harmonic motion four-stroke engine |
| CN102125910A (en) * | 2010-12-07 | 2011-07-20 | 南京工程学院 | Amplitude and energy adjustable mechanical random vibration exciting device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453118A (en) * | 2013-08-30 | 2013-12-18 | 湖北中烟工业有限责任公司 | Double-bearing over-positioning device |
| CN103551297A (en) * | 2013-11-18 | 2014-02-05 | 农业部规划设计研究院 | Amplitude adjustable vibration excitation device |
| CN103551297B (en) * | 2013-11-18 | 2015-09-23 | 农业部规划设计研究院 | A kind of Amplitude adjustable vibration excitation device |
| CN105841905A (en) * | 2016-05-23 | 2016-08-10 | 中国工程物理研究院总体工程研究所 | Linear motion compensation device with characteristic of automatic center-alignment |
| CN107884291A (en) * | 2017-10-16 | 2018-04-06 | 太原理工大学 | A kind of rock axial direction sine and cosine adds unloading single axis test machines device |
| CN107884291B (en) * | 2017-10-16 | 2020-12-11 | 太原理工大学 | Rock axial sine and cosine loading and unloading single-shaft testing machine device |
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| Publication number | Publication date |
|---|---|
| CN102445353B (en) | 2014-02-05 |
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Address after: 212028 Zhenjiang, Dantu Metro Industrial Park Rui East Road, No. 9 Patentee after: Jiangsu University of Science and Technology Address before: 212003 Zhenjiang City, Jiangsu province dream Creek Road, No. 2 Patentee before: Jiangsu University of Science and Technology |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20171010 |