CN109058279B - Eccentric wheel - Google Patents
Eccentric wheel Download PDFInfo
- Publication number
- CN109058279B CN109058279B CN201811297060.9A CN201811297060A CN109058279B CN 109058279 B CN109058279 B CN 109058279B CN 201811297060 A CN201811297060 A CN 201811297060A CN 109058279 B CN109058279 B CN 109058279B
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- CN
- China
- Prior art keywords
- eccentric
- wheel
- wheel body
- eccentric bearing
- bearing column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 16
- 230000005484 gravity Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 4
- 239000013013 elastic material Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000009347 mechanical transmission Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
- F16C3/22—Cranks; Eccentrics
-
- 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
- F16H57/00—General details of gearing
- F16H57/0006—Vibration-damping or noise reducing means specially adapted for gearings
-
- 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
- F16H57/00—General details of gearing
- F16H57/0018—Shaft assemblies for gearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention provides an eccentric wheel. The novel wheel comprises a wheel body, wherein a positioning pillow block is arranged in the geometric center of one side of the wheel body, and an eccentric bearing column is arranged on the other side of the wheel body. The wheel body is of a hollow disc-shaped structure with one end face closed, and the wheel body is divided into a first part and a second part along the plane of the central axis; the positioning pillow block is a semi-cylindrical boss and is positioned at the first part; the eccentric bearing post is a cylindrical boss located at the second portion. Reinforcing ribs are arranged in the second part of the wheel body, and through holes are formed in the end face of the second part; a first part of the wheel body is internally provided with a reinforcing column; the center of gravity of the eccentric wheel falls on the axis of the wheel body. The invention ensures that the gravity center of the eccentric wheel is positioned at the axis of the wheel body, and improves the stability of the eccentric wheel when the eccentric wheel is matched with other parts. The eccentric bearing column is generally connected with the hole in a matched manner, the shaft and the hole are tightly attached, the looseness is difficult, the installation is firm, and the assembly stability and the assembly precision of the eccentric wheel are greatly improved.
Description
Technical Field
The invention relates to the technical field of mechanical transmission, in particular to an eccentric wheel.
Background
Eccentric, as the name implies, means that the center of the wheel is not at the point of rotation, generally referred to as a circular wheel, which becomes an eccentric when the circle is not rotating about its own center.
Eccentric wheels are commonly used in mechanical arrangements to produce reciprocating motion. The eccentric wheel with a conventional structure causes the gravity center to deviate from the geometric center due to the deviation of the shaft hole to one side, thereby affecting the efficiency and the precision of mechanical transmission. Moreover, when the eccentric wheel is connected with other transmission parts, the eccentric wheel is easy to loosen and is not firm. In diaphragm pumps, generally, a metal eccentric wheel is adopted, the metal eccentric wheel can only be machined into a circular shaft hole through machining and is assembled on an output shaft of a motor, in order to prevent relative rotation, a circular hole is often required to be increased in the radial direction of the eccentric wheel, the process is complex through screw fastening, and along with high-speed rotation of the eccentric wheel, the screw is easy to loosen, so that the motor is separated from the eccentric wheel.
In view of the foregoing, there is a need for an eccentric that overcomes the problems of the prior art.
Disclosure of Invention
The invention aims to provide an eccentric wheel so as to solve the problems of unstable installation, poor stability and the like of the eccentric wheel.
In order to achieve the above purpose, the invention provides an eccentric wheel, which comprises a wheel body, wherein a positioning pillow block is arranged in the geometric center of one side of the wheel body, and an eccentric bearing column is arranged on the other side of the wheel body.
The wheel body is of a hollow disc-shaped structure with one end face closed, and the wheel body is divided into a first part and a second part along the plane of the central axis; the positioning pillow block is a semi-cylindrical boss and is positioned at the first part; the eccentric bearing post is a cylindrical boss located at the second portion.
Reinforcing ribs are arranged in the second part of the wheel body, and through holes are formed in the end face of the second part; a reinforcing post is arranged in the first part of the wheel body.
The sum of the weights of the first part and the positioning pillow block is equal to the sum of the weights of the second part and the eccentric bearing post, and the center of gravity of the eccentric wheel falls on the axis of the wheel body.
Preferably, the number of the reinforcing columns is four.
Preferably, the number of the through holes is two.
Preferably, the positioning pillow block is provided with a D-shaped shaft hole, and the shaft hole penetrates through the wheel body and the eccentric bearing column.
Preferably, the eccentric bearing post is internally provided with a groove, so that the eccentric bearing post has elasticity.
Preferably, the eccentric wheel is made of a nonmetallic material with elasticity in an integral injection molding mode.
The technical scheme of the invention has the following beneficial effects:
(1) According to the invention, the reinforcing column is arranged in the first part of the wheel body, the reinforcing rib is arranged in the second part of the wheel body, and the through hole is formed in the groove, so that the sum of the weights of the first part and the positioning pillow block is equal to the sum of the weights of the second part and the eccentric bearing column, the gravity center of the eccentric wheel is ensured to be positioned at the axis of the wheel body, the stability of the eccentric wheel when the eccentric wheel is matched with other parts is improved, and the service life of the eccentric wheel is prolonged.
(2) In the invention, the eccentric bearing column is generally connected with the hole in a matching way, and the eccentric bearing column is internally provided with a groove and is made of nonmetallic elastic materials, so that the eccentric bearing column can be compressed and rebounded along the radial direction. The eccentric bearing post is inserted into the hole in a compressed state, a gap exists between the shaft and the hole, and the assembly is simple; after the eccentric bearing post is inserted into the hole, the eccentric bearing post can rebound slowly to restore to the original shape, so that tension exists between the shaft and the hole, the shaft and the hole are tightly attached, the looseness is not easy, the installation is firm, and the assembly stability and the assembly precision of the eccentric wheel are greatly improved.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a front isometric view of an eccentric;
FIG. 2 is a rear isometric view of the eccentric;
FIG. 3 is a front view of the eccentric;
FIG. 4 is an A-direction rotational cross-sectional view of the eccentric;
FIG. 5 is a top view of the eccentric;
FIG. 6 is a rear view of the eccentric;
FIG. 7 is a graph of diaphragm pump noise test versus graph;
Fig. 8 is a graph comparing eccentric press-in force tests.
Wherein 1, the wheel body, 11, a first part, 111, reinforcing columns, 12, a second part, 121 and reinforcing ribs, 122, through holes, 2, positioning pillow blocks, 21, shaft holes, 3, eccentric bearing columns, 31 and grooves.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1 to 6, an eccentric wheel, the present embodiment is applied to an eccentric wheel mechanism of a diaphragm pump.
An eccentric wheel comprises a wheel body 1, wherein a positioning pillow block 2 is arranged in the geometric center of one side of the wheel body 1, and an eccentric bearing column 3 is arranged on the other side of the wheel body 1; the eccentric wheel is made of elastic nonmetallic materials through integral injection molding.
The wheel body 1 is of a hollow disc-shaped structure with a closed end face, and the wheel body 1 is divided into a first part 11 and a second part 12 along the plane of the central axis; the positioning pillow block 2 is a semi-cylindrical boss and is positioned on the first part 11; the eccentric bearing post 3 is a cylindrical boss and is positioned on the second part 12; the second part 12 of the wheel body 1 is internally provided with a reinforcing rib 121, and the end surface of the second part 12 is provided with a through hole 122; the number of the through holes 122 is two. The first part 11 of the wheel body 1 is internally provided with a reinforcing column 111; the number of the reinforcing columns 111 is four. The sum of the weights of the first part 11 and the positioning pillow block 2 is equal to the sum of the weights of the second part 12 and the eccentric bearing post 3, and the center of gravity of the eccentric falls on the axis of the wheel body.
The positioning pillow block 2 is provided with a D-shaped shaft hole 21, and the shaft hole 21 penetrates through the wheel body 1 and the eccentric bearing column 3. The eccentric bearing column 3 is internally provided with a groove 31, so that the eccentric bearing column has elasticity and can radially compress and rebound.
The eccentric wheel mechanism of the diaphragm pump mainly comprises an eccentric wheel and a connecting rod, and the eccentric wheel is connected with the connecting rod through a bearing. The bearing is sleeved on an eccentric bearing column of the eccentric wheel; the output shaft of the motor is inserted into the shaft hole of the eccentric wheel to provide rotating power for the eccentric wheel.
The hardware eccentric wheel used in the conventional diaphragm pump and the plastic eccentric wheel adopted in the embodiment are selected for noise test comparison, and the test environment is: a mute room with the temperature of 27 ℃ and the humidity of 70%. The test method is as follows:
(1) And (3) externally connecting 12V voltage, fully opening an inlet and an outlet, and starting the diaphragm pump.
(2) Firstly, measuring the environmental noise by using a decibel meter, wherein the environmental noise is lower than 40db; the decibel meter was then placed over the micropump at 0CM for 1 test.
(3) 10 Sets of data were collected for each eccentric, test results were recorded, and a graph was drawn.
The test results are shown in the following table:
The test result shows that the average noise value of the diaphragm pump adopting the hardware eccentric wheel is 66.37 dB; the diaphragm pump adopting the plastic eccentric wheel has the average noise value of 57.75 dB, and the noise generated by the plastic eccentric wheel is far smaller than that generated by the hardware eccentric wheel, so that the noise reduction effect is obvious. A graph is drawn based on the test results, and as shown in fig. 7, the abscissa represents the sample number and the ordinate represents the noise level. The standard deviation of the noise data of the hardware eccentric wheel 10 groups can be calculated to be 4.28, the standard deviation of the noise data of the plastic eccentric wheel 10 groups is 1.78, and the smaller the standard deviation is, the lower the discrete degree is, and the stability is good.
The hardware eccentric wheel used in the conventional diaphragm pump and the plastic eccentric wheel adopted in the embodiment are selected for carrying out the press-in force test comparison, and the test method is as follows:
(1) The eccentric wheel entering tool is fixed on a precise servo press according to the standard;
(2) Debugging a press, setting pressure parameters, and pressing an eccentric wheel into a bearing;
(3) 10 sets of data were collected and plotted.
The test results are shown in the following table:
The test result shows that the average value of the pressing force of the hardware eccentric wheel is 157.02N; the pressing force of the plastic eccentric wheel is 157.56N, and the average value of the pressing force of the two eccentric wheels is equal. A graph is drawn according to the test results, and as shown in fig. 8, the abscissa represents the sample number and the ordinate represents the magnitude of the pressing force. The standard deviation of the pressing force of the 10 groups of the hardware eccentric wheels can be calculated to be 80.04, the standard deviation of the pressing force of the 10 groups of the plastic eccentric wheels is 15.41, the standard deviation of the pressing force of the hardware eccentric wheels is far greater than that of the pressing force of the plastic eccentric wheels, and the smaller the standard deviation is, the lower the discrete degree is, and the stability is good.
In the eccentric wheel, the reinforcing column is arranged in the first part of the wheel body, the reinforcing ribs are arranged in the second part of the wheel body, and the through holes are formed in the grooves, so that the sum of the weights of the first part and the positioning pillow block is equal to the sum of the weights of the second part and the eccentric bearing column, the gravity center of the eccentric wheel is ensured to be positioned at the axis of the wheel body, the stability of the eccentric wheel when the eccentric wheel is matched with other parts is improved, and the service life of the eccentric wheel is prolonged.
In the eccentric wheel, the eccentric bearing column is connected with the bearing hole in a matched manner, and the eccentric bearing column is provided with the groove and is made of a nonmetallic elastic material, so that the eccentric bearing column can be compressed and rebounded along the radial direction. The eccentric bearing post is inserted into the hole in a compressed state, a gap exists between the shaft and the hole, and the assembly is simple; after the eccentric bearing post is inserted into the hole, the eccentric bearing post can rebound slowly to restore to the original shape, so that tension exists between the shaft and the hole, the shaft and the hole are tightly attached, the looseness is not easy, the installation is firm, and the assembly stability and the assembly precision of the eccentric wheel are greatly improved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The eccentric wheel is characterized by comprising a wheel body (1), wherein a positioning pillow block (2) is arranged in the geometric center of one side of the wheel body (1), and an eccentric bearing column (3) is arranged on the other side of the wheel body (1);
the wheel body (1) is of a hollow disc-shaped structure with a closed end face, and the wheel body (1) is divided into a first part (11) and a second part (12) along the plane of the central axis; the positioning pillow block (2) is a semi-cylindrical boss and is positioned at the first part (11); the eccentric bearing column (3) is a cylindrical boss and is positioned at the second part (12);
Reinforcing ribs (121) are arranged in the second part (12) of the wheel body (1), and through holes (122) are formed in the end face of the second part (12); a first part (11) of the wheel body (1) is internally provided with a reinforcing column (111);
The sum of the weights of the first part (11) and the positioning pillow block (2) is equal to the sum of the weights of the second part (12) and the eccentric bearing column (3), and the gravity center of the eccentric wheel falls on the axis of the wheel body;
The positioning pillow block (2) is provided with a D-shaped shaft hole (21), and the shaft hole (21) penetrates through the wheel body (1) and the eccentric bearing column (3);
the eccentric bearing column (3) is internally provided with a groove (31) so that the eccentric bearing column (3) has elasticity, the eccentric bearing column can be compressed and rebounded along the radial direction, and when the eccentric bearing column (3) is in a compressed state, the eccentric bearing column is inserted into the hole, and a gap exists between the shaft and the hole; after the eccentric bearing post is inserted into the hole, the eccentric bearing post (3) can rebound slowly to the original shape, so that tension exists between the shaft and the hole.
2. An eccentric wheel according to claim 1, characterized in that the number of reinforcement columns (111) is four.
3. An eccentric wheel according to claim 1, characterized in that the number of through holes (122) is two.
4. An eccentric as in claim 1, wherein said eccentric is integrally injection molded from a resilient nonmetallic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811297060.9A CN109058279B (en) | 2018-11-01 | 2018-11-01 | Eccentric wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811297060.9A CN109058279B (en) | 2018-11-01 | 2018-11-01 | Eccentric wheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109058279A CN109058279A (en) | 2018-12-21 |
| CN109058279B true CN109058279B (en) | 2024-04-26 |
Family
ID=64788918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811297060.9A Active CN109058279B (en) | 2018-11-01 | 2018-11-01 | Eccentric wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109058279B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255039A (en) * | 2019-07-16 | 2019-09-20 | 贵阳普天物流技术有限公司 | A kind of intelligence carrier loader |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100196920B1 (en) * | 1996-06-11 | 1999-06-15 | 장일웅 | A dual pump for compressor and motor |
| CN1422580A (en) * | 2002-07-17 | 2003-06-11 | 张明 | Spring bed cushion with complex deformation directions and parallel elastic assembly |
| DE102004005204A1 (en) * | 2004-02-03 | 2005-08-11 | Continental Teves Ag & Co. Ohg | Radial piston pump has rotating multi-eccentric on rotationally secured cylindrical outer sleeve with elastic means for guiding and supporting rolling bearing in vehicle anti-lock braking systems |
| CN2718326Y (en) * | 2004-07-22 | 2005-08-17 | 王占洪 | Sewing and braiding machine drive case eccentric wheel |
| DE102010028594A1 (en) * | 2010-05-05 | 2011-11-10 | Robert Bosch Gmbh | eccentric |
| CN102797680A (en) * | 2012-07-03 | 2012-11-28 | 珠海格力电器股份有限公司 | Eccentric variable crankshaft and rotary compressor using same |
| CN203115038U (en) * | 2013-02-19 | 2013-08-07 | 东莞市凌锐汽车零部件有限公司 | Improved-type reduction gear |
| CN206054322U (en) * | 2016-08-31 | 2017-03-29 | 长沙多浦乐泵业科技有限公司 | A kind of micropump of waterproof structure |
| CN206290407U (en) * | 2016-12-23 | 2017-06-30 | 厦门闳图盛道科技有限公司 | A kind of eccentric wheel of oilless air compressor |
| CN208966845U (en) * | 2018-11-01 | 2019-06-11 | 长沙多浦乐泵业科技有限公司 | A kind of eccentric wheel |
-
2018
- 2018-11-01 CN CN201811297060.9A patent/CN109058279B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100196920B1 (en) * | 1996-06-11 | 1999-06-15 | 장일웅 | A dual pump for compressor and motor |
| CN1422580A (en) * | 2002-07-17 | 2003-06-11 | 张明 | Spring bed cushion with complex deformation directions and parallel elastic assembly |
| DE102004005204A1 (en) * | 2004-02-03 | 2005-08-11 | Continental Teves Ag & Co. Ohg | Radial piston pump has rotating multi-eccentric on rotationally secured cylindrical outer sleeve with elastic means for guiding and supporting rolling bearing in vehicle anti-lock braking systems |
| CN2718326Y (en) * | 2004-07-22 | 2005-08-17 | 王占洪 | Sewing and braiding machine drive case eccentric wheel |
| DE102010028594A1 (en) * | 2010-05-05 | 2011-11-10 | Robert Bosch Gmbh | eccentric |
| CN102884326A (en) * | 2010-05-05 | 2013-01-16 | 罗伯特·博世有限公司 | Eccentric bearing |
| CN102797680A (en) * | 2012-07-03 | 2012-11-28 | 珠海格力电器股份有限公司 | Eccentric variable crankshaft and rotary compressor using same |
| CN203115038U (en) * | 2013-02-19 | 2013-08-07 | 东莞市凌锐汽车零部件有限公司 | Improved-type reduction gear |
| CN206054322U (en) * | 2016-08-31 | 2017-03-29 | 长沙多浦乐泵业科技有限公司 | A kind of micropump of waterproof structure |
| CN206290407U (en) * | 2016-12-23 | 2017-06-30 | 厦门闳图盛道科技有限公司 | A kind of eccentric wheel of oilless air compressor |
| CN208966845U (en) * | 2018-11-01 | 2019-06-11 | 长沙多浦乐泵业科技有限公司 | A kind of eccentric wheel |
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| Publication number | Publication date |
|---|---|
| CN109058279A (en) | 2018-12-21 |
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