CN112460215B - Offset shafting thrust reaction cancellation device - Google Patents
Offset shafting thrust reaction cancellation device Download PDFInfo
- Publication number
- CN112460215B CN112460215B CN202011332026.8A CN202011332026A CN112460215B CN 112460215 B CN112460215 B CN 112460215B CN 202011332026 A CN202011332026 A CN 202011332026A CN 112460215 B CN112460215 B CN 112460215B
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- China
- Prior art keywords
- shafting
- balancing weight
- cam
- lever
- guide rod
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/16—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
- F16H21/18—Crank gearings; Eccentric gearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/28—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same
Abstract
The invention discloses an eccentric shaft system support reaction force cancellation device which comprises a shaft system (1), a base (2), a cam (3), a guide rod (4), a rotating shaft (5), a lever (6) and a balancing weight (7). The connection relation of the components is as follows: the shafting drives the cam to rotate, the cam drives the guide rod to move, the guide rod pushes one end of the lever to enable the lever to rotate around the rotating shaft, the other end of the lever is connected with the balancing weight, the balancing weight moves correspondingly while the lever rotates, and the base serves as a main structure of the device to fix the shafting, the guide rod and the rotating shaft. The working profile curve of the cam is reasonably designed, the movement direction of the balancing weight and the movement direction of the shafting center of mass point are opposite, the vertical support reaction caused by the driving force of the balancing weight and the shafting eccentric rotation are offset, and the purpose of inhibiting the vertical support reaction of the shafting is achieved.
Description
Technical Field
The invention relates to the technical field of eccentric shafting bearing reaction inhibition, in particular to an eccentric shafting bearing reaction force counteracting device which can inhibit vertical bearing reaction force during rotation of an eccentric shafting and is particularly suitable for bearing reaction force inhibition of a space eccentric shafting.
Background
In the field of aerospace, the performance of a high-precision satellite instrument is influenced by the support reaction force brought by a motion mechanism. For an eccentric shaft system in a space, in order to restrain a support reaction force caused by rotation of the eccentric shaft system, counterweight treatment is generally carried out, and the mass and volume consumption are correspondingly increased. The eccentric shafting of the high frequency rotation that does not have the counter weight can adopt the mode of passive vibration isolation to restrain its reaction of bearing, but to the eccentric shafting of low-speed operation, passive vibration isolation can not compromise shafting vibration isolation efficiency and support rigidity, and active vibration isolation will bring a large amount of resource consumption again.
Disclosure of Invention
In order to solve the problems of large volume and mass resource consumption of the eccentric shafting bearing reaction force suppression of low-frequency transmission, the invention provides an eccentric shafting bearing reaction force cancellation device.
The technical scheme of the support reaction force cancellation device provided by the invention comprises the following steps: shafting, base, cam, guide bar, pivot, lever, balancing weight. The connection relation of the components is as follows: the shafting is fixed in the base and can realize the rotation around its axis, and the pivot is fixed in the base and can realize the rotation around its axis, and the guide bar is fixed in the base and can realize along its pole to the rotation, and the shafting drives the cam rotation, and the cam drive guide bar removes, and the guide bar promotes lever one end and makes its rotation around the pivot, and the lever other end links to each other with the balancing weight, and the lever rotates and the balancing weight realizes corresponding motion simultaneously, and the base is as the major structure fixed shafting of this device, guide bar and pivot.
Furthermore, a working profile curve of the cam is reasonably designed, the moving directions of the balancing weight and a shafting center of mass point are opposite, the driving force of the balancing weight and the vertical support reaction force caused by the eccentric rotation of the shafting are offset, and the purpose of inhibiting the vertical support reaction force of the shafting is achieved.
Compared with the prior art, the invention has the advantages that:
1) The invention has compact structure and does not occupy the space in the opposite direction of the center of mass of the shafting.
2) The invention utilizes the shafting to drive, and does not need additional driving device.
Drawings
FIG. 1 is a schematic diagram of an offset shafting thrust-reaction force cancellation device according to the present invention;
FIG. 2 is a three-dimensional schematic view of an eccentric shafting support reaction force cancellation device according to the present invention.
In the figure: 1 is a shaft system; 2 is a base; 3 is a cam; 4 is a guide rod; 5 is a rotating shaft; 6 is a lever; and 7, a balancing weight.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the following embodiments and accompanying fig. 1-2.
As shown in fig. 1, a shaft system 1 is connected with a cam 3, the cam 3 drives a guide rod 4 to move, the rotation of the shaft system 1 is converted into the movement of the guide rod 4, the guide rod 4 drives a lever 6 to rotate around a rotating shaft 5, the lever 6 is connected with a balancing weight 7, the lever 6 rotates to drive the balancing weight 7 to move, a base 2 serves as a main structure to fix the shaft system 1, the guide rod 4 and the rotating shaft 5 are arranged, and the center CM of mass of the shaft system 1 is the eccentric distance r.
As shown in fig. 2, k is the movement amount of the guide rod 4, a is the horizontal distance from the rotating shaft 5 to the center point of the guide rod 4, and B is the horizontal distance from the rotating shaft 5 to the centroid of the counterweight block 7.
Assuming that the eccentric mass of the shafting is m, the mass of the balancing weight 7 is m 0 The shafting rotates according to a fixed mode theta (t) within the range of 0-90 degrees, t is time, and in order to offset the support reaction force of the eccentric shafting, the following requirements are met:
k (t) can be obtained by a numerical calculation method, and the working profile curve of the cam 3 can be designed.
Claims (1)
1. An eccentric shafting bearing reaction force cancellation device is characterized in that: the support reaction force counteracting device comprises a shaft system (1), a base (2), a cam (3), a guide rod (4), a rotating shaft (5), a lever (6) and a balancing weight (7), wherein the shaft system (1) is fixed on the base (2) and can rotate around the axis of the shaft system, the rotating shaft (5) is fixed on the base (2) and can rotate around the axis of the rotating shaft, the guide rod (4) is fixed on the base (2) and can rotate along the rod direction of the guide rod, the shaft system (1) drives the cam (3) to rotate, the cam (3) drives the guide rod (4) to move, the guide rod (4) pushes one end of the lever (6) to rotate around the rotating shaft (5), the other end of the lever (6) is connected with the balancing weight (7), and the lever (6) rotates while the balancing weight (7) realizes corresponding movement;
by reasonably designing the working profile curve of the cam, the movement directions of the balancing weight and the shafting center of mass point are opposite, so that the vertical support reaction caused by the driving force of the balancing weight and the shafting eccentric rotation is offset, and the purpose of inhibiting the shafting vertical support reaction is achieved;
supposing that the eccentric mass of the shafting is m, and the mass of the balancing weight (7) is m 0 In order to offset the thrust reaction of the eccentric shafting, the shafting rotates in a range of 0-90 degrees according to a fixed mode theta (t), wherein t is time and needs to satisfy the following conditions:
k (t) can be obtained by a numerical calculation method, and then the working profile curve of the cam (3) can be designed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011332026.8A CN112460215B (en) | 2020-11-24 | 2020-11-24 | Offset shafting thrust reaction cancellation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011332026.8A CN112460215B (en) | 2020-11-24 | 2020-11-24 | Offset shafting thrust reaction cancellation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112460215A CN112460215A (en) | 2021-03-09 |
| CN112460215B true CN112460215B (en) | 2022-12-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011332026.8A Active CN112460215B (en) | 2020-11-24 | 2020-11-24 | Offset shafting thrust reaction cancellation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112460215B (en) |
Citations (7)
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| DE102009051296A1 (en) * | 2009-10-29 | 2011-05-05 | Bayerische Motoren Werke Aktiengesellschaft | Reciprocating piston-internal combustion engine i.e. one-cylinder reciprocating piston-internal combustion engine, has balancing shaft, where distance of axis of shaft to axis of crankshaft is in determined relation to offset of crank drive |
| CN202614529U (en) * | 2012-04-26 | 2012-12-19 | 上海大学 | Noise measuring device for rolling bearing |
| CN104405837A (en) * | 2014-10-29 | 2015-03-11 | 中国科学院苏州生物医学工程技术研究所 | Ultraprecise friction driving mechanism |
| CN106763483A (en) * | 2016-12-29 | 2017-05-31 | 宜昌长机科技有限责任公司 | The automatic full balanced design method of high speed gear shaper main motion inertia force |
| CN110082087A (en) * | 2019-05-13 | 2019-08-02 | 无锡科力捷新能源科技有限公司 | Motor shaft shearing resistance test fixture |
| CN209977157U (en) * | 2019-05-29 | 2020-01-21 | 上海唯冠医疗科技有限公司 | Gravity balancing device |
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| DE2323063C3 (en) * | 1973-05-08 | 1975-10-16 | Maschinenfabrik Ernst Thielenhaus, 5600 Wuppertal | Vibratory grinding tool drive |
| DE3149597A1 (en) * | 1981-02-11 | 1982-09-30 | Rapid Maschinen und Fahrzeuge AG, 8953 Dietikon, Zürich | Drive transmission for a tool oscillating in a plane and also its use |
| JP4318074B2 (en) * | 2003-08-08 | 2009-08-19 | 村田機械株式会社 | Punch press |
| EP1837425B1 (en) * | 2006-03-22 | 2010-08-04 | Maschinenfabrik Rieter Ag | Balancing a nipper mechanism in a combing machine |
| JP2009275552A (en) * | 2008-05-13 | 2009-11-26 | Honda Motor Co Ltd | Link type stroke variable engine |
| JP5417977B2 (en) * | 2009-05-13 | 2014-02-19 | 日産自動車株式会社 | Vibration reduction structure of multi-link engine |
| CN102338149A (en) * | 2010-07-23 | 2012-02-01 | 中清能（北京）科技有限公司 | Crankshaft-flywheel unit, and internal-combustion engine, compressor and motion transition mechanism adopting the crankshaft-flywheel unit |
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2020
- 2020-11-24 CN CN202011332026.8A patent/CN112460215B/en active Active
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| JP2003083396A (en) * | 2001-09-07 | 2003-03-19 | Toyota Industries Corp | Reciprocating engine balancer |
| DE102009051296A1 (en) * | 2009-10-29 | 2011-05-05 | Bayerische Motoren Werke Aktiengesellschaft | Reciprocating piston-internal combustion engine i.e. one-cylinder reciprocating piston-internal combustion engine, has balancing shaft, where distance of axis of shaft to axis of crankshaft is in determined relation to offset of crank drive |
| CN202614529U (en) * | 2012-04-26 | 2012-12-19 | 上海大学 | Noise measuring device for rolling bearing |
| CN104405837A (en) * | 2014-10-29 | 2015-03-11 | 中国科学院苏州生物医学工程技术研究所 | Ultraprecise friction driving mechanism |
| CN106763483A (en) * | 2016-12-29 | 2017-05-31 | 宜昌长机科技有限责任公司 | The automatic full balanced design method of high speed gear shaper main motion inertia force |
| CN110082087A (en) * | 2019-05-13 | 2019-08-02 | 无锡科力捷新能源科技有限公司 | Motor shaft shearing resistance test fixture |
| CN209977157U (en) * | 2019-05-29 | 2020-01-21 | 上海唯冠医疗科技有限公司 | Gravity balancing device |
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| CN112460215A (en) | 2021-03-09 |
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