CN108061137B - Double-arc-shaped connecting rod balanced cam transmission mechanism - Google Patents
Double-arc-shaped connecting rod balanced cam transmission mechanism Download PDFInfo
- Publication number
- CN108061137B CN108061137B CN201810017079.7A CN201810017079A CN108061137B CN 108061137 B CN108061137 B CN 108061137B CN 201810017079 A CN201810017079 A CN 201810017079A CN 108061137 B CN108061137 B CN 108061137B
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- Prior art keywords
- cam
- connecting rod
- arc
- arc connecting
- shaped connecting
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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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/08—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion
- F16H25/14—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion with reciprocation perpendicular to the axis of rotation
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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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0463—Grease lubrication; Drop-feed lubrication
- F16H57/0464—Grease lubrication
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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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
-
- 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
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
-
- 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
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
- F16H2057/126—Self-adjusting during operation, e.g. by a spring
- F16H2057/127—Self-adjusting during operation, e.g. by a spring using springs
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Gears, Cams (AREA)
Abstract
The invention relates to the field of cam transmission, in particular to a double-arc-shaped connecting rod balanced cam transmission mechanism which comprises a cam shaft, a first cam, a second cam, a first arc-shaped connecting rod, a second arc-shaped connecting rod and a driven connecting rod, wherein the first cam and the second cam are fixed on the cam shaft side by side front and back, the first arc-shaped connecting rod and the second arc-shaped connecting rod are respectively positioned at two side edges of the first cam, one ends of the first arc-shaped connecting rod and the second arc-shaped connecting rod are hinged with the driven connecting rod, rolling shafts are arranged at the other ends of the first arc-shaped connecting rod and the second arc-shaped connecting rod, the first arc-shaped connecting rod and the second arc-shaped connecting rod are connected through a tension spring, the rolling shafts of the first arc-shaped connecting rod and the second arc-shaped connecting rod are clung to the side edges of the second cam, and driven connecting rod rolling shafts are also arranged on the driven connecting rod and clung to the outer side edges of the first cam. After the scheme is adopted, the running resistance can be effectively reduced, the running noise is reduced, and the service life is prolonged.
Description
Technical Field
The invention relates to the field of cam transmission, in particular to a double-arc-shaped connecting rod balanced cam transmission mechanism.
Background
The cam transmission mechanism converts the rotation motion of the cam into the reciprocating motion of the driven member, a spring component is arranged on one side of the driven member opposite to the cam, so that the driven member can reciprocate along the running track of the cam, and the cam transmission mechanism is typically used for controlling the opening or closing of an air inlet valve and an exhaust valve in the combustion chamber of the internal combustion engine;
when the cam transmission mechanism operated by the spring attaching mode is operated, the operation of compressing the spring is required to be carried out at least once in each operation period, and the compression value of the spring corresponds to the height difference value of the displacement of the side edge of the cam from a low point to a high point, so that the operation resistance of the transmission mode is larger, and meanwhile, the abrasion and noise are avoided;
therefore, the inventor further research and develop a double-arc-shaped connecting rod balanced cam transmission mechanism, which is generated by the scheme.
Disclosure of Invention
The invention aims to provide a double-arc-shaped connecting rod balanced cam transmission mechanism which can effectively reduce running resistance, reduce running noise and prolong service life.
In order to achieve the above object, the technical scheme of the present invention is as follows:
the utility model provides a balanced cam drive mechanism of two arc connecting rods, includes camshaft, first cam, second cam, first arc connecting rod, second arc connecting rod, driven link, first cam and second cam fix around the camshaft side by side, first arc connecting rod, second arc connecting rod be located the both sides limit of first cam respectively, the one end of first arc connecting rod, second arc connecting rod all articulates with driven link, the other end of first arc connecting rod, second arc connecting rod is provided with the roller bearing, connect through extension spring between first arc connecting rod, the second arc connecting rod, the roller bearing of first arc connecting rod, second arc connecting rod hugs closely with the side of second cam, also be provided with driven link roller bearing on the driven link, driven link roller bearing is located between the pin joint of first arc connecting rod, second arc connecting rod and driven link, driven link roller bearing is hugged closely with first cam outside limit.
Further, at least one cavity is respectively arranged in the first cam and the second cam, a cam cover plate is arranged on the cam shaft, and the cavity is closed by the cam cover plate.
Further, at least one through hole is formed in the first cam, the through hole connects the chamber and the side edge of the first cam, and at least one through hole is formed in the second cam, and the through hole connects the chamber and the side edge of the second cam.
Further, two sides of the combination body formed by the first cam and the second cam are provided with cam cover plates, the side edges of the cam cover plates are provided with through holes connected to the cavities inside the first cam and the second cam, and sealing screws are arranged at the outer edges of the through holes.
Further, the outer edge shape of the second cam is determined in a simulation calculation mode according to the outer edge shape of the first cam and positions corresponding to the driven connecting rod, the first arc-shaped connecting rod and the second arc-shaped connecting rod, when the cam shaft rotates to work and drive the first cam and the second cam to rotate, the stretching of a stretching spring connected between the first arc-shaped connecting rod and the second arc-shaped connecting rod is always kept in a certain range.
Further, the stretching range value of the stretching spring is between 0 cm and 5 cm.
After the scheme is adopted, compared with the prior art, the invention has the following advantages:
when the cam shaft rotates to work and drive the first cam and the second cam to rotate, the driven connecting rod is transmitted by the driven connecting rod bearing, the first arc connecting rod and the second arc connecting rod, the driven connecting rod realizes reciprocating motion along the running track of the first cam, and as each roller is tightly attached to the cam surface at any time under the action of the tension spring, gaps are not generated, and redundant vibration and abrasion are avoided;
under the balance action of the rotation of the second cam, the stretching end of the stretching spring connected with the first arc-shaped connecting rod and the second arc-shaped connecting rod is kept in a smaller range, so that the running resistance of the transmission mechanism is effectively reduced, and the transmission efficiency and smoothness are improved;
the lubricating grease inside the cam cavity can lubricate the outer edges of the first cam and the second cam, so that the service life of the mechanism can be prolonged, the running noise can be reduced, and the maintenance cost can be reduced.
Drawings
FIG. 1 is a schematic front view of a dual arcuate link balanced cam gear mechanism of the present invention.
Fig. 2 is a perspective schematic view of a double arc link balanced cam drive mechanism of the present invention.
FIG. 3 is an exploded view of the cam member of the dual arcuate link balanced cam gear mechanism of the present invention.
Fig. 4A, fig. 4B, fig. 4C and fig. 4D are working state diagrams of the double arc-shaped connecting rod balanced cam transmission mechanism of the invention in one circle of operation.
Description of the reference numerals
The cam shaft 1, the first cam 2, the second cam 3, the cam cover plate 4, the driven connecting rod 5, the driven connecting rod roller 6, the first arc-shaped connecting rod 7, the second arc-shaped connecting rod 8, the first arc-shaped connecting rod roller 9, the second arc-shaped connecting rod roller 10, the tension spring 11, the cavity 12, the cam through hole 13, the cam cover plate through hole 14 and the sealing screw 15.
Detailed Description
Referring to fig. 1 and 2, a balanced type cam drive mechanism of double arc connecting rod, including camshaft 1, first cam 2, second cam 3, cam apron 4, follower link 5, follower link roller 6, first arc connecting rod 7, second arc connecting rod 8, first arc connecting rod roller 9, second arc connecting rod roller 10, first cam 2 and second cam 3 fix on camshaft 1 around side by side, cam apron 4 sets up respectively in the both sides of the assembly that first cam 2 and second cam 3 constitute, follower link 5 is provided with follower link roller 6, first arc connecting rod 7 and second arc connecting rod 8 are located the both sides limit of first cam 2 respectively, its one end is articulated with follower link 5, this pin joint is located follower link roller 6 both sides, the other end of first arc connecting rod 7 and second arc connecting rod 8 is fixed with the axostylus axostyle respectively, this axostyle is parallel with 1, first arc connecting rod roller 9 and second arc connecting rod 10 set up respectively on corresponding axostylus axostyle, connect through extension spring 11 between first arc connecting rod 7 and the second arc connecting rod 8, and the effect that first arc connecting rod roller 9 and second arc connecting rod roller 10 force down the second arc connecting rod roller 9 and second arc connecting rod roller 11 to force down the second arc connecting rod 5 to be closely fit under the effect of first arc connecting rod roller 11 and second arc connecting rod 2 and second arc connecting rod 5.
When the cam shaft 1 rotates to work, the driven connecting rod 5 realizes reciprocating motion along the running track of the first cam 2 under the action and limitation of the driven connecting rod roller 6 and the first arc connecting rod 7 and the second arc connecting rod 8, and realizes kinetic energy output at the other end of the driven connecting rod 5 (the original purpose of the applicant is to solve the high-speed reciprocating motion required by a sewing needle when an embroidery machine is sewn, the rotating speed of the cam shaft is over 1000PPM when the embroidery machine is usually operated, a large-scale embroidery machine needs several tens of needles to work simultaneously, and a large amount of fiber dust and dust exists in the working environment, so that the applicant can not only use the field according to the principle of the driven connecting rod.
Referring to fig. 3, two chambers 12 are respectively provided in the first cam 2 and the second cam 3, the cam cover 4 seals the chambers 12, the chambers 12 are used for placing lubricating grease, two through holes 13 are provided in the first cam, the through holes 13 connect the chambers 12 with the side edges of the first cam 2, two through holes 13 are provided in the second cam 3, the through holes 13 connect the chambers 12 with the side edges of the second cam 3, and when the cam shaft 1 rotates to work and drive the first cam 2 and the second cam 3 to rotate, the lubricating grease in the chambers 12 can reach the side edges of the first cam 2 or the second cam 3 along the through holes 13 to play a role in lubrication.
The cam cover 4 is provided with a through hole 14 connected to the chamber 12 at the side edge, and a sealing screw 15 is arranged at the outer edge of the through hole 14, and when the sealing screw 15 is opened, the cam cover can be used for adding lubricating grease to the chamber 12.
The outer edge shape of the second cam 3 is determined by the outer edge shape of the first cam 2 and the positions corresponding to the driven connecting rod 5, the first arc connecting rod 7, the second arc connecting rod 8 and the hinge and the roller connected with the driven connecting rod, through a simulation calculation mode, when the cam shaft 1 rotates to work and drive the first cam 2 and the second cam 3 to rotate, the stretching of the stretching spring 11 is always kept within a range smaller than 5 cm, as shown in fig. 4A, 4B, 4C and 4D, the changing values of the stretching states L1, L2, L3 and L4 of the stretching spring 11 corresponding to the four positions of the first cam 2 and the second cam 3 rotating for a circle are always within a smaller range, so that the operation resistance of the double arc connecting rod balanced cam transmission mechanism is smaller, and the transmission efficiency and smoothness are improved.
The foregoing is only specific embodiments of the invention, and words such as "upper, lower, left, right, middle" and the like in the present invention are merely used for reference, but not for absolute limitation, and any insubstantial modifications made by the present invention should be construed as infringement of the scope of the invention.
Claims (4)
1. A double-arc-shaped connecting rod balanced cam transmission mechanism is characterized in that: including camshaft, first cam, second cam, first arc connecting rod, second arc connecting rod, driven link, first cam and second cam fix around side by side on the camshaft, first arc connecting rod, second arc connecting rod be located the both sides limit of first cam respectively, the one end of first arc connecting rod, second arc connecting rod all articulates with driven link, the other end of first arc connecting rod, second arc connecting rod is provided with the roller bearing, connect through extension spring between first arc connecting rod, the second arc connecting rod, the roller bearing of first arc connecting rod, second arc connecting rod and the side of second cam hug closely, also be provided with driven link roller bearing on the driven link, driven link roller bearing is located between the pin joint of first arc connecting rod, second arc connecting rod and driven link, driven link roller bearing hugs closely with first cam outside limit, be provided with at least one cavity in first cam and the second cam respectively, the cam cover will the cavity is sealed, the both sides that first cam and second cam become the assembly are provided with the cam cover, first cam and second cam are provided with the cavity and the inside the through-hole is sealed to the second cam, the inside is provided with the through-hole.
2. The double-arc-shaped connecting rod balanced cam transmission mechanism according to claim 1, wherein: the first cam is provided with at least one through hole which is connected with the cavity and the side edge of the first cam, and the second cam is provided with at least one through hole which is connected with the cavity and the side edge of the second cam.
3. The double-arc-shaped connecting rod balanced cam transmission mechanism according to claim 1, wherein: the outer edge shape of the second cam is determined in a simulation calculation mode according to the outer edge shape of the first cam and the corresponding positions of the driven connecting rod, the first arc connecting rod and the second arc connecting rod, when the cam shaft rotates to work and drive the first cam and the second cam to rotate, the stretching of a stretching spring connected between the first arc connecting rod and the second arc connecting rod is always kept in a certain range.
4. A double-arc-shaped connecting rod balanced cam transmission mechanism according to claim 3, wherein: the stretching range value of the stretching spring is between 0 and 5 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017079.7A CN108061137B (en) | 2018-01-09 | 2018-01-09 | Double-arc-shaped connecting rod balanced cam transmission mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017079.7A CN108061137B (en) | 2018-01-09 | 2018-01-09 | Double-arc-shaped connecting rod balanced cam transmission mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108061137A CN108061137A (en) | 2018-05-22 |
| CN108061137B true CN108061137B (en) | 2023-07-25 |
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ID=62141645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810017079.7A Active CN108061137B (en) | 2018-01-09 | 2018-01-09 | Double-arc-shaped connecting rod balanced cam transmission mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN108061137B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB551040A (en) * | 1941-12-16 | 1943-02-04 | Cotton Ltd W | Improvements in straight bar knitting machines |
| TW582460U (en) * | 2003-06-27 | 2004-04-01 | Ind Tech Res Inst | Conjugate cam type pick and place mechanism |
| JP2007075299A (en) * | 2005-09-13 | 2007-03-29 | Barudan Co Ltd | Sewing machine |
| CN103481656A (en) * | 2013-07-26 | 2014-01-01 | 北京印刷学院 | Moving platform driving device for die-cutting stamping machine |
| CN103726198A (en) * | 2013-12-27 | 2014-04-16 | 浙江理工大学 | Five-link double-cam driving mechanism for tuck-in selvage bearded needle |
| CN204608363U (en) * | 2015-05-14 | 2015-09-02 | 安徽省萧县徽星机械制造有限公司 | A kind of cam drive of sewing quilt machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8752451B2 (en) * | 2010-04-13 | 2014-06-17 | Dennis A. Parker | Cam mechanism for converting constant velocity rotary motion into a constant velocity reciprocating motion |
-
2018
- 2018-01-09 CN CN201810017079.7A patent/CN108061137B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB551040A (en) * | 1941-12-16 | 1943-02-04 | Cotton Ltd W | Improvements in straight bar knitting machines |
| TW582460U (en) * | 2003-06-27 | 2004-04-01 | Ind Tech Res Inst | Conjugate cam type pick and place mechanism |
| JP2007075299A (en) * | 2005-09-13 | 2007-03-29 | Barudan Co Ltd | Sewing machine |
| CN103481656A (en) * | 2013-07-26 | 2014-01-01 | 北京印刷学院 | Moving platform driving device for die-cutting stamping machine |
| CN103726198A (en) * | 2013-12-27 | 2014-04-16 | 浙江理工大学 | Five-link double-cam driving mechanism for tuck-in selvage bearded needle |
| CN204608363U (en) * | 2015-05-14 | 2015-09-02 | 安徽省萧县徽星机械制造有限公司 | A kind of cam drive of sewing quilt machine |
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| Publication number | Publication date |
|---|---|
| CN108061137A (en) | 2018-05-22 |
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