CN102445353B - Mechanical simple harmonic excitation device - Google Patents
Mechanical simple harmonic excitation device Download PDFInfo
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- CN102445353B CN102445353B CN201110307213.5A CN201110307213A CN102445353B CN 102445353 B CN102445353 B CN 102445353B CN 201110307213 A CN201110307213 A CN 201110307213A CN 102445353 B CN102445353 B CN 102445353B
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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 simple harmonic excitation device of using in particular for ride-control performance test.
Background technology
Vehicle shock absorber test-bed requirement provides simple harmonic quantity (sine) the exciting function of speed and amplitude in accordance with regulations, the external company that produces such testing table all adopts the hydraulic servo oil cylinder of controlling based on hydraulic efficiency servo-valve to realize sine excitation, as American MTS and Britain Inston.But the testing table cost of controlling based on hydraulic servo is high, and especially imported hydraulic servo test platform price is more expensive.For a long time, it is simple that the damper test stand of domestic-developed conventionally adopt slider-crank mechanism to be similar to replace sine mechanism, this alternative advantage, and shortcoming is to have introduced kinematic error, when the ratio of length of connecting rod and crank length is 10, the kinematic error of introducing is about 5%.In addition, because connecting rod is done Planar Compound motion, its barycenter acceleration and angular acceleration can cause periodically vibrating force and moment, wearing and tearing and the fatigue failure of meeting acceleration means.Why current most testing table does not directly adopt sine mechanism but carrys out approximate substitution with slider-crank mechanism, and reason is that traditional mechanical type sine mechanism is introduced sliding friction, and sliding pair exists gap and easy to wear and affect serviceable life.
Recent year has unit to start to develop 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 sliding pair sine mechanism to exist.But this mechanism's link is more, heavy moving parts is large and cost is higher.
Summary of the invention
The object of the invention is, in order to overcome the existing defect of prior art, provides a kind of mechanical simple harmonic excitation device simple in structure.
To achieve the above object, the present invention realizes the technical scheme that object adopts and is:
, 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; Described disk 5 is coaxially connected with driving shaft 13; Described excentric shaft 9 is installed with disk 5 is eccentric; Described exciting ring 6 is provided with the kidney-shaped slotted eye 6a of a perforation, described kidney-shaped slotted eye 6a contacts with the bearing pair 7 being arranged on excentric shaft 9, described exciting ring 6 is solidly fixed with described vibrating shaft 1 by screw 10 and taper bolt 11, is provided with bearing holder (housing, cover) 4 and is provided with in the support 3 of end cap 2 in described vibrating shaft 1 is placed in.
Kidney-shaped slotted eye 6a on exciting ring 6 described above is by two of left and right semicircle orifice and upper plane 6b and two tangent forming of parallel plane of lower plane 6c, 1/2 1 sections of plane 6b rear sides are provided with on one and lift face 6d on described, and before described lower plane 6c, 1/2 1 sections are provided with a surface of subsidence 6e.
Bearing pair 7 described above is comprised of two front bearing 7a and rear bearing 7b that are sleeved on excentric shaft 9, between described front bearing 7a and rear bearing 7b inner ring, an inner spacing collar 12 is set, described front bearing 7a outer ring contacts with described upper plane 6b, and described rear bearing 7b contacts with described lower plane 6c.
On bearing holder (housing, cover) 4 inner hole walls described above, have annular groove one 4a and annular groove two 4c on also, between described annular groove one 4a and annular groove two 4c, by helicla flute 4b, be connected.
Compared with prior art, its advantage and beneficial effect are mainly reflected in a kind of mechanical simple harmonic excitation device of the present invention:
Innovation of the present invention is to realize the sinusoidal regular movement of pure rolling by succinct structure, by monolateral stressed pair of bearings separately on the horizontal loops slotted eye on exciting ring and excentric shaft, while making excentric shaft with disk uniform rotation, bearing and exciting ring between surface of contact, be pure rolling friction up and down.
The invention has the beneficial effects as follows simple for structurely, vibrating shaft and exciting ring are dismountable integral structure, have reduced structure height, the light and low feature of cost of vertical movement parts matter weight.
Accompanying drawing explanation
Fig. 1 is front elevation of the present invention;
Fig. 2 is the A-A cut-open view of Fig. 1;
In 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, exciting ring, 6a, kidney-shaped slotted eye, 6b, upper plane, 6c, lower plane, 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
Below by the present invention, being used for vehicle shock absorber test-bed is specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
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 and fixed by desired eccentric distance e with disk 5, exciting ring 6 has two taper bolts 11 to locate and uses screw 10 to be solidly fixed with vibrating shaft 1, makes the upper lower plane (6b, 6c) of kidney-shaped slotted eye 6a of exciting ring 6 and the axis C of vibrating shaft 1 keep vertical.
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, by bearing pair 7 and exciting ring 6, drive vibrating shaft 1 to pump, at this moment the characteristics of motion of vibrating shaft 1 is for take the sinusoidal motion that eccentric distance e is radius, motional amplitude is eccentric distance e 2 times.
Fig. 2 is the A-A cut-open view of Fig. 1, and disk 5 is coaxially connected with driving shaft 13, and driving shaft 13 adopts variable frequency reducer motor to drive, and by bearings, is installed.The bearing pair 7 that is sleeved on excentric shaft 9 is comprised 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 makes two bearings axial restraint in excentric shaft 9 ends.
The kidney-shaped slotted eye 6a that exciting ring 6 is provided with a perforation contacts with the bearing pair 7 being arranged on excentric shaft 9, for two bearings are being horizontally slipped as pure rolling with the relative of exciting ring 6 when rotating with excentric shaft 9, kidney slot 6a shape to exciting ring 6 is processed, the right lower plane 6c of front bearing 7a (1/2 width) is processed to a bit of distance downwards, form surface of subsidence 6e, front bearing 7a is departed from and contact with lower plane 6c, and only contact with upper plane 6b; In like manner, the right upper plane 6b of rear bearing 7b (1/2 width) is upwards processed to a bit of distance, in formation, lift face 6d, rear bearing 7b is departed to be contacted with upper plane 6b, and only contact with lower plane 6c, and each bearing and kidney-shaped slotted eye 6a are single edge contact, and the outer ring of front bearing 7a contacts with upper 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, and the relative motion of bearing under loaded state and between upper and lower plane 6b, the 6c of exciting ring mounting hole 6a is pure rolling.
Between bearing holder (housing, cover) 4 and support 3, for slight interference coordinates, the effect of end cap 2 is retainer shaft bearing sleeve 4 axial restraints.Good lubricated in order to make to keep between bearing holder (housing, cover) 4 and 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, in bearing holder (housing, cover) 4 endoporus upper and lowers, respectively process annular groove one 4a and annular groove two 4c, and with helicla flute 4b, connect between two annular grooves, play trapped fuel effect, can make vibrating shaft 1 produce oil film when pumping and between the endoporus of bearing holder (housing, cover) 4, strengthen lubricant effect, reduce wear, improve serviceable life.
It is larger that the diameter of disk 5 designs, and the moment of inertia producing in rotary course plays wheel action, and the velocity variations that load fluctuation is produced can play stabilization.
For vibrating shaft 1 is not deflected in moving up and down, the anti-deflection device (omitting in figure) of vibrating shaft also should be set.
The course of work is: by frequency control motor (omitting in figure), drive driving shaft 13 uniform rotation, by disk 5, drive excentric shaft 9 to make eccentric rotary around disk 5 axis, by being installed on bearing pair 7 on excentric shaft 9 to vibrating shaft 1 application of force being connected with exciting ring 6, make it to produce sine excitation.
According to the feature of sine mechanism, the bearing pair 7 on excentric shaft 9 during near exciting ring 6 two ends, left and right vertical speed maximum, the exciting force applying is maximum; And when bearing pair 7 is positioned at exciting ring 6 middle part, be displacement break-in position, speed is zero, institute is stressed also minimum.
Claims (2)
1. a mechanical simple harmonic excitation device, comprises driving shaft (13), disk (5), excentric shaft (9), bearing pair (7), bearing holder (housing, cover) (4) and support (3); Described disk (5) is coaxially connected with driving shaft (13); Described excentric shaft (9) is installed with disk (5) is eccentric; It is characterized in that: also comprise exciting ring (6) and vibrating shaft (1), described exciting ring (6) is provided with the kidney-shaped slotted eye (6a) of a perforation, described kidney-shaped slotted eye (6a) contacts with the bearing pair (7) being arranged on excentric shaft (9), described exciting ring (6) is solidly fixed with described vibrating shaft (1) by screw (10) and taper bolt (11), is provided with bearing holder (housing, cover) (4) and is provided with in the support (3) of end cap (2) in described vibrating shaft (1) is placed in; Kidney-shaped slotted eye (6a) on described exciting ring (6) is by two of left and right semicircle orifice and upper plane (6b) and two tangent forming of parallel plane of lower plane (6c), 1/2 1 sections of plane (6b) rear sides are provided with on one and lift face (6d) on described, first 1/2 1 sections of described lower plane (6c), are provided with a surface of subsidence (6e); Described bearing pair (7) is comprised of two front bearing (7a) and rear bearings (7b) that are sleeved on excentric shaft (9), between described front bearing (7a) and rear bearing (7b) inner ring, an inner spacing collar (12) is set, described front bearing (7a) outer ring contacts with described upper plane (6b), and described rear bearing (7b) contacts with described lower plane (6c).
2. a kind of mechanical simple harmonic excitation device according to claim 1, it is characterized in that: on described bearing holder (housing, cover) (4) inner hole wall, have annular groove one (4a) and annular groove two (4c) on also, between described annular groove one (4a) and annular groove two (4c), by helicla flute (4b), be connected.
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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110307213.5A CN102445353B (en) | 2011-10-10 | 2011-10-10 | Mechanical simple harmonic excitation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102445353A CN102445353A (en) | 2012-05-09 |
| CN102445353B true CN102445353B (en) | 2014-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110307213.5A Expired - Fee Related CN102445353B (en) | 2011-10-10 | 2011-10-10 | Mechanical simple harmonic excitation device |
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| CN (1) | CN102445353B (en) |
Families Citing this family (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 |
| 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 |
| CN105841905B (en) * | 2016-05-23 | 2018-07-06 | 中国工程物理研究院总体工程研究所 | It is a kind of can automatic aligning linear motion compensation 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 |
Family Cites Families (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 |
| CN102125910B (en) * | 2010-12-07 | 2013-01-09 | 南京工程学院 | Amplitude and energy adjustable mechanical random vibration exciting device |
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| CN102445353A (en) | 2012-05-09 |
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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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Granted publication date: 20140205 Termination date: 20171010 |
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