CN215980406U - Eccentricity adjusting mechanism convenient for adjusting amplitude - Google Patents
Eccentricity adjusting mechanism convenient for adjusting amplitude Download PDFInfo
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- CN215980406U CN215980406U CN202122123258.9U CN202122123258U CN215980406U CN 215980406 U CN215980406 U CN 215980406U CN 202122123258 U CN202122123258 U CN 202122123258U CN 215980406 U CN215980406 U CN 215980406U
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- eccentric
- main shaft
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- amplitude
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Abstract
The utility model discloses an eccentricity adjusting mechanism convenient for adjusting amplitude, which comprises an eccentric main shaft, wherein an eccentric adjusting disc is fixedly arranged on the eccentric main shaft, a plurality of bolt holes are distributed on the eccentric adjusting disc, an eccentric sleeve is arranged on one side of the eccentric adjusting disc, the eccentric sleeve is embedded and sleeved on the eccentric main shaft, one side of the eccentric sleeve is fixedly connected with the eccentric adjusting disc through bolts, a crank connecting rod is sleeved on the outer side of the eccentric sleeve in a surrounding mode, and an oil bearing is arranged between the crank connecting rod and the eccentric sleeve. The utility model has low cost, changes the linear reciprocating vibration into the rotary circular motion, and avoids the high cost of a servo hydraulic or electric driving system; and the form of a full mechanical workpiece is adopted, the precision can reach mu level, and the rolling form of the eccentric shaft can be accurately adjusted to any required amplitude value.
Description
Technical Field
The utility model belongs to the field of mechanical driving, and particularly relates to an eccentricity adjusting mechanism convenient for amplitude adjustment.
Background
The eccentric shaft is usually fixed on the rotating shaft of the motor through an eccentric hole, and when the motor is started, the eccentric shaft makes a cam motion. Therefore, the composite material is widely applied to automobiles, engines, pumps and the like. At present, in an eccentric motion mechanism, the eccentricity is usually fixed, so that the motion stroke and the use range are limited. Although some eccentric mechanisms with adjustable eccentricity appear in recent years, the eccentric mechanisms are still not ideal during the use process, and have the following defects:
1. the bolt is adjusted, a gap is reserved, and the fine vibration amplitude of 0.25mm, 0.51mm and the like required by the test is difficult to accurately control and display or lock;
2. the stroke of the oil cylinder is adjusted, a servo valve is needed, and the cost is high; and the phase lag of nearly 70 degrees can be generated at the ultra-high frequency of 37Hz, thereby influencing the test effect
3. Different eccentric blocks are replaced, a large amount of disassembly and assembly work needs to be carried out in each test, and the bearing link is especially designed, so that huge manpower is consumed.
Disclosure of Invention
The utility model aims to provide an eccentricity adjusting mechanism convenient for adjusting amplitude so as to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides an eccentricity adjustment mechanism convenient to adjust amplitude, includes eccentric main shaft, the last fixed eccentric adjustment dish that is provided with of eccentric main shaft, it has a plurality of bolt holes to distribute on the eccentric adjustment dish to be provided with eccentric cover in one side of eccentric adjustment dish, the cover is inlayed to eccentric cover on eccentric main shaft, and bolt and eccentric adjustment dish fixed connection are passed through to one side of eccentric cover to the cover is equipped with the crank connecting rod around the outside of eccentric cover, is equipped with the oiliness bearing between crank connecting rod and eccentric cover.
In a further preferred embodiment of the present invention, the eccentric spindle includes concentric rotating portions at both ends and an eccentric portion between the concentric rotating portions, and the eccentric adjustment disk and the eccentric sleeve are mounted on the eccentric rotating portion.
As a further preferable aspect of this aspect, both ends of the eccentric main shaft are attached to the bearing blocks through main shaft bearings.
As a further preferred aspect of the present invention, one end of the eccentric main shaft is connected to an output end of the driving mechanism.
As a further preferred aspect of the present invention, a connection lug or a connection projection is disposed on one side of the eccentric sleeve close to the eccentric adjustment disk, and a bolt hole is disposed on the connection lug or the connection projection.
In a further preferred embodiment of the present invention, the bolt hole in the eccentric adjustment disk is annular.
In a further preferred embodiment of the present invention, the fastening end of the bolt is provided with a flat washer, a spring washer, and a fastening nut in this order.
The utility model has the following beneficial effects:
(1) the cost is low, linear reciprocating vibration is converted into rotary circular motion, and the high cost of a servo hydraulic or electric driving system is avoided;
(2) the precision can reach mu level by adopting a full mechanical workpiece form, and the rolling form of the eccentric shaft can be accurately adjusted to any required amplitude value
(3) The double-bolt locking mode ensures that the amplitude is fixed and unchanged in the vibration test process;
(4) the eccentricity is convenient to adjust, the operation is convenient, and the popularization and the use are easy.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the eccentric sleeve of the present invention at 0 degrees relative to the axis of the drive shaft;
fig. 3 is a schematic cross-sectional view of the eccentric sleeve of the present invention rotated 45 degrees counterclockwise with respect to fig. 1.
Labeled as: 1-bearing block, 2-eccentric main shaft, 3-eccentric sleeve, 4-oil-retaining bearing, 5-crank connecting rod, 6-bolt, 7-eccentric adjusting disk, 8-flat washer, 9-spring washer, 10-fastening nut and 11-main shaft bearing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention: the utility model provides an eccentricity adjustment mechanism convenient to adjust amplitude, includes eccentric main shaft 2, the fixed eccentric adjustment dish 7 that is provided with on the eccentric main shaft 2, it has a plurality of bolt holes to distribute on the eccentric adjustment dish 7 to be provided with eccentric cover 3 in one side of eccentric adjustment dish, eccentric cover 3 inlays the cover on eccentric main shaft 2, and bolt 6 and eccentric adjustment dish 7 fixed connection are passed through to one side of eccentric cover 3 to the cover is equipped with crank connecting rod 5 around the outside of eccentric cover 3, is equipped with between crank connecting rod 5 and eccentric cover 3 and contains oil bearing 4.
In this embodiment, the eccentric spindle 2 includes concentric rotating portions at both ends and an eccentric rotating portion between the concentric rotating portions, and the eccentric adjusting disk and the eccentric sleeve are both mounted on the eccentric rotating portion.
In this embodiment, two ends of the eccentric main shaft 2 are mounted on the bearing block 1 through the main shaft bearing 11.
In this embodiment, one end of the eccentric spindle 2 is connected with the output end of the driving mechanism; here we choose the motor as the driving mechanism of the eccentric main shaft, the motor drives the eccentric main shaft 2 to rotate, the eccentric main shaft 2 drives the eccentric sleeve 3 to rotate through the eccentric adjusting disk 7, the eccentric sleeve 3 drives the crank connecting rod 5 to do up-and-down reciprocating motion in the rotating process.
In this embodiment, a connection lug or a connection bump is arranged on one side of the eccentric sleeve 3 close to the eccentric adjustment disk 7, and a bolt hole is arranged on the connection lug or the connection bump, so that the eccentric sleeve 3 and the eccentric adjustment disk 7 can be fixedly connected through a bolt 6 after the eccentricity is determined. The bolt holes in the eccentric adjusting disc 7 are arranged in a ring shape, and scales can be arranged at the edge of the bolt holes, so that stepless adjustment can be conveniently realized; in addition, a flat washer 8 and a spring washer 9 are provided at the fastening end of the bolt 6 to increase the stability.
This eccentricity adjusting mechanism's theory of operation convenient to adjust amplitude:
as shown in figure 2, the eccentricity of the eccentric sleeve 3 and the eccentric spindle 2 is offset, the initial eccentricity is 0, and the external bearing crank connecting rod and the rotating axis of the motor are superposed and coaxially rotate. As shown in fig. 3, when the angle between the eccentric sleeve 3 and the eccentric adjusting disk 7 is adjusted, the eccentric distance of the eccentric main shaft 2 and the eccentric sleeve 3 is steplessly changed, for example, the eccentric sleeve is rotated 45 degrees counterclockwise by adjusting the installation position of the eccentric sleeve, so that after the eccentric sleeve and the eccentric shaft are fixed, the axes of the external bearing and the crank connecting rod move, and eccentric vibration is generated at the final eccentric distance shown in the figure relative to the axis of the motor, that is, if the eccentric main shaft 2 is rotated, the crank connecting rod 5 and the oil bearing 4 rotate eccentrically along with the eccentric sleeve 3, and reciprocating motion is output to the slide block, and the vibration frequency is consistent with the rotation speed of the main shaft.
Therefore, the eccentric distance can be adjusted by adjusting the connecting position between the eccentric sleeve and the eccentric adjusting disk. In addition, it should be noted that the output vibration of the present mechanism is sinusoidal vibration, and the frequency is consistent with the rotation speed of the main shaft, so that it is unable to output non-sinusoidal vibration with variable amplitude and variable frequency within one period.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution methods fall within the scope of the present invention.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (7)
1. The utility model provides an eccentricity adjustment mechanism convenient to adjust amplitude, includes eccentric main shaft, its characterized in that, the last fixed eccentric adjustment dish that is provided with of eccentric main shaft, be provided with the bolt hole on the eccentric adjustment dish to be provided with eccentric cover in one side of eccentric adjustment dish, eccentric cover inlays the cover on eccentric main shaft, and bolt and eccentric adjustment dish fixed connection are passed through to one side of eccentric cover to the cover is equipped with the crank connecting rod to the outside of eccentric cover encloses, is equipped with the oiliness bearing between crank connecting rod and eccentric cover.
2. The eccentricity adjustment mechanism of claim 1, wherein the eccentric shaft comprises concentric rotation portions at two ends and an eccentric portion between the concentric rotation portions, and the eccentric adjustment disk and the eccentric sleeve are mounted on the eccentric rotation portion.
3. An eccentricity adjustment mechanism convenient for amplitude adjustment according to claim 1 or 2, wherein both ends of the eccentric main shaft are mounted on bearing blocks through main shaft bearings.
4. An eccentricity adjustment mechanism, facilitating the adjustment of the amplitude of oscillation, as claimed in claim 1 or claim 2, in which one end of the eccentric spindle is connected to the output of the drive mechanism.
5. The eccentric distance adjusting mechanism convenient for adjusting the amplitude of vibration of claim 1, wherein the eccentric sleeve is provided with a connecting lug or a connecting convex block at one side close to the eccentric adjusting disk, and the connecting lug or the connecting convex block is provided with a bolt hole.
6. The eccentric adjustment mechanism of claim 1, wherein the bolt hole of the eccentric adjustment disk is ring-shaped.
7. An eccentricity adjustment mechanism convenient to adjust amplitude according to claim 1, 5 or 6, wherein the fastening end of the bolt is provided with a flat washer, a spring washer and a fastening nut in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122123258.9U CN215980406U (en) | 2021-09-03 | 2021-09-03 | Eccentricity adjusting mechanism convenient for adjusting amplitude |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122123258.9U CN215980406U (en) | 2021-09-03 | 2021-09-03 | Eccentricity adjusting mechanism convenient for adjusting amplitude |
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| Publication Number | Publication Date |
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| CN215980406U true CN215980406U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122123258.9U Active CN215980406U (en) | 2021-09-03 | 2021-09-03 | Eccentricity adjusting mechanism convenient for adjusting amplitude |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114645501A (en) * | 2022-04-11 | 2022-06-21 | 青岛科泰重工机械有限公司 | Vibration mechanism for switching composite vibration and circumferential vibration, vibration shaft assembly and steel wheel |
-
2021
- 2021-09-03 CN CN202122123258.9U patent/CN215980406U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114645501A (en) * | 2022-04-11 | 2022-06-21 | 青岛科泰重工机械有限公司 | Vibration mechanism for switching composite vibration and circumferential vibration, vibration shaft assembly and steel wheel |
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