CN110043621B - Double-chain-wheel transmission mechanism and application method thereof - Google Patents
Double-chain-wheel transmission mechanism and application method thereof Download PDFInfo
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- CN110043621B CN110043621B CN201910361401.2A CN201910361401A CN110043621B CN 110043621 B CN110043621 B CN 110043621B CN 201910361401 A CN201910361401 A CN 201910361401A CN 110043621 B CN110043621 B CN 110043621B
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- chain
- sprocket
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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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/06—Gearings for conveying rotary motion by endless flexible members with chains
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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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The invention provides a double-chain wheel transmission mechanism and an application method thereof, wherein the double-chain wheel transmission mechanism comprises: a drive sprocket fixedly mounted on the drive shaft; a driven sprocket fixedly mounted on the driven drive shaft; a drive chain engageable with the drive sprocket and the driven sprocket; the double-chain wheel transmission mechanism further comprises: the chain tensioning wheel can be meshed with the driving chain, the chain tensioning wheel is arranged in a vertical waist-shaped hole, and the chain tensioning wheel can move up and down in the vertical waist-shaped hole to adjust the tensioning degree of the driving chain; a driving backup sprocket fixedly mounted on the driving drive shaft; a driven backup sprocket fixedly mounted on the driven drive shaft; when the chain tension wheel moves downwards to the lowest position along the vertical waist-shaped hole, the driving chain can be meshed with the driving spare chain wheel and the driven spare chain wheel. The double-chain wheel transmission mechanism can save the time for replacing the chain, reduce the time for maintaining the fault of the machine, reduce the labor intensity of a user and improve the working efficiency of the whole machine.
Description
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to a double-chain wheel transmission mechanism and an application method thereof.
Background
Rape is a main oil crop in China, and the rape industry needs to be developed vigorously to improve the total yield of rape and improve the planting area of rape. Mechanized field management and sowing are the most effective means for realizing the rape planting in a large area and high efficiency, and are important guarantees for high yield of rape.
The traditional rape planting machine has single function, needs to be repeatedly used for planting, is out of farming season and has certain damage to cultivated land. Particularly, under the influence of the operating environment, the adopted chain transmission is easy to wear and lengthen, the jumping and chain dropping are easy to occur, the frequent replacement of the chain greatly delays the agricultural time requirement, reduces the operating efficiency and hinders the development of the rape planting mechanization.
Disclosure of Invention
The invention mainly aims to provide a double-chain-wheel transmission mechanism and an application method thereof, and aims to solve the problems that a chain wheel transmission mechanism in the prior art needs to frequently replace chains, is long in maintenance time and troublesome in operation and affects the working efficiency of the whole machine.
In order to achieve the above object, according to one aspect of the present invention, there is provided a double sprocket transmission mechanism including a drive sprocket fixedly mounted on a drive shaft;
the driven chain wheel is fixedly arranged on the driven driving shaft;
the driving chain can be meshed with the driving chain wheel and the driven chain wheel;
this double sprocket drive mechanism still includes:
the chain tensioning wheel can be meshed with the driving chain, the chain tensioning wheel is arranged in a vertical waist-shaped hole, and the chain tensioning wheel can move up and down in the vertical waist-shaped hole to adjust the tensioning degree of the driving chain;
the driving standby chain wheel is fixedly arranged on the driving shaft;
the driven spare chain wheel is fixedly arranged on the driven driving shaft;
when the chain tension wheel moves downwards to the lowest position along the vertical waist-shaped hole, the driving chain can be meshed with the driving spare chain wheel and the driven spare chain wheel.
Further, the initial length L of the drive chain1The following relation is satisfied:
wherein, L1Is the initial length of the drive chain in m;
a is the center distance between the driving chain wheel and the driven chain wheel, and the unit is m;
p is the chain pitch of the drive chain in m;
i is the transmission ratio between the driving chain wheel and the driven chain wheel;
Z1the number of teeth of the driving chain wheel;
the chain tension pulley moves downwards along the vertical waist-shaped hole toLength L of drive chain at lowest position2The following relation is satisfied:
wherein, L2When the chain tensioning wheel is positioned at the lowest position, the length of the driving chain is m;
a is the center distance between the driving spare chain wheel and the driven spare chain wheel, and the unit is m;
p is the chain pitch of the drive chain in m;
i is the transmission ratio between the driving standby chain wheel and the driven standby chain wheel;
Z1the number of teeth of the driving standby chain wheel;
the distance H between the initial position and the lowest position of the chain tensioner and the length L of the drive chain when the chain tensioner is at the lowest position2Satisfies the following relation:
wherein R is1Is the radius of the driving chain wheel and has the unit of m;
R2the radius of the chain tension wheel is m;
R3is the radius of the driven sprocket in m;
a is the vertical projection distance between the driving chain wheel and the center of the chain tension wheel, and the unit is m;
b is the vertical projection distance between the chain tension wheel and the center of the driven chain wheel, and the unit is m;
c is the height difference between the center of the chain tension wheel and the center of the driving chain wheel when the chain tension wheel is at the lowest position;
h is the distance between the initial position and the lowest position of the chain tensioner, and is expressed in m.
Further, the center distance between the driving spare chain wheel and the driven spare chain wheel is consistent with the center distance between the driving chain wheel and the driven chain wheel; the transmission ratio between the driving spare chain wheel and the driven spare chain wheel is consistent with the transmission ratio between the driving chain wheel and the driven chain wheel.
According to another aspect of the present invention, there is provided a method of using the above-mentioned twin-sprocket transmission mechanism, the method comprising the steps of:
meshing a driving chain with a driving chain wheel and a driven chain wheel, and meshing a chain tension pulley with the driving chain;
the length of the driving chain is gradually increased along with the operation of the double chain wheel transmission mechanism, and the driving chain is kept in a tensioning state by moving the chain tensioning wheel downwards;
and the length of the driving chain is continuously increased along with the continuous operation of the double chain wheel transmission mechanism, and when the chain tensioning wheel moves downwards to the lowest position, the driving chain is taken down and meshed with the driving spare chain wheel and the driven spare chain wheel.
By applying the technical scheme of the invention, the driving chain is meshed with the driving chain wheel and the driven chain wheel for transmission when in normal use; with the operation of the double chain wheel transmission mechanism, the length of the worn chain of the driving chain is gradually increased, and the driving chain is kept in a tensioning state by moving the chain tensioning wheel downwards; the length of the driving chain is continuously increased along with the continuous operation of the double-chain wheel transmission mechanism, when the chain tensioning wheel moves downwards to the lowest position, the driving chain is taken down, and the driving chain is meshed with the driving spare chain wheel and the driven spare chain wheel, so that the double-chain wheel transmission mechanism can continuously operate. The double-chain wheel transmission mechanism can save the time for replacing the chain, reduce the time for maintaining the fault of the machine, reduce the labor intensity of a user and improve the working efficiency of the whole machine.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a double sprocket transmission mechanism according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of the chain tensioner pressing down structure in the double sprocket transmission according to the embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a drive sprocket; 20. a driven sprocket; 30. a drive chain; 40. a chain tensioner; 50. a vertical kidney-shaped hole; 60. a driving standby chain wheel; 70. a driven backup sprocket; 110. an active drive shaft; 120. a driven drive shaft.
Detailed Description
In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The use of the words "a" or "an" and the like in the description and claims of the present patent application do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Referring to fig. 1 and 2, a double-chain wheel transmission mechanism according to an embodiment of the present invention is applicable to various mechanical devices, and is particularly applicable to agricultural machines (such as rape planters) with complex working environments. As can be seen from fig. 1 and 2, the double sprocket drive mechanism mainly includes a driving sprocket 10, a driven sprocket 20, a driving chain 30, a chain tensioner 40, a driving backup sprocket 60, and a driven backup sprocket 70.
Wherein, the driving sprocket 10 is fixedly installed on the driving shaft 110; the driven sprocket 20 is fixedly mounted on the driven driving shaft 120; the drive chain 30 can mesh with the drive sprocket 10 and the driven sprocket 20; the chain tension pulley 40 can be meshed with the driving chain 30, the chain tension pulley 40 is arranged in a vertical kidney-shaped hole 50, and the chain tension pulley 40 can move up and down in the vertical kidney-shaped hole 50 to adjust the tension degree of the driving chain 30; the driving backup sprocket 60 is fixedly mounted on the driving drive shaft 110; the driven backup sprocket 70 is fixedly mounted on the driven drive shaft 120; also, when the chain tensioner 40 moves down along the vertical kidney-shaped hole 50 to the lowermost position, the drive chain 30 can be engaged with the driving backup sprocket 60 and the driven backup sprocket 70.
In the double-sprocket transmission mechanism, the driving sprocket 10 and the driving spare sprocket 60 are simultaneously arranged on the driving shaft 110, the driven sprocket 20 and the driven spare sprocket 70 are simultaneously arranged on the driven driving shaft 120, the driving chain 30 capable of being meshed with the driving sprocket 10 and the driven sprocket 20 and the chain tensioning wheel 40 capable of being meshed with the driving chain 30 are arranged, the chain tensioning wheel 40 is arranged in the vertical kidney-shaped hole 50, and the tensioning degree of the driving chain 30 can be adjusted by moving the chain tensioning wheel 40 up and down. In normal use, the driving chain 30 is meshed with the driving chain wheel 10 and the driven chain wheel 20 for transmission; with the operation of the double chain wheel transmission mechanism, the chain length of the drive chain 30 gradually abraded becomes longer, and at the moment, the drive chain 30 can be kept in a tensioning state by moving the chain tensioning wheel 40 downwards; as the double sprocket drive continues to operate, the length of the drive chain 30 continues to increase, and as the chain tensioner 40 moves down to the lowest position, the drive chain 30 is removed and the drive chain 30 engages the driving backup sprocket 60 and the driven backup sprocket 70, allowing the double sprocket drive to continue to operate. The double-chain wheel transmission mechanism can effectively save the replacement time of the chain, reduce the fault maintenance time of the machine, reduce the labor intensity of a user and improve the working efficiency of the whole machine.
In the present embodiment, since the driving sprocket 10 and the driving backup sprocket 60 are both mounted on the driving shaft 110, the driven sprocket 20 and the driven backup sprocket 70 are both mounted on the driven driving shaft 120; therefore, the center distance between the driving backup sprocket 60 and the driven backup sprocket 70 is identical to the center distance between the driving sprocket 10 and the driven sprocket 20; and the transmission ratio between the driving backup sprocket 60 and the driven backup sprocket 70 is identical to the transmission ratio between the driving sprocket 10 and the driven sprocket 20.
Specifically, referring to fig. 2, in the present embodiment, the initial length L of the drive chain 301The following relation is satisfied:
wherein, L1Is the initial length of the drive chain 30 in m;
a is the center distance between the driving sprocket 10 and the driven sprocket 20, and the unit is m;
p is the chain pitch of the drive chain 30 in m;
i is the transmission ratio between the driving sprocket 10 and the driven sprocket 20;
Z1the number of teeth of the drive sprocket 10;
and the chain tensioner 40 moves down the vertical kidney-shaped hole 50 to the lowest position, the length L of the drive chain 302Satisfies the following relation (5):
wherein, L2When the chain tension pulley 40 is located at the lowest position, the length of the driving chain 30 is m;
a is the center distance between the driving spare sprocket 60 and the driven spare sprocket 70, and the unit is m;
p is the chain pitch of the drive chain 30 in m;
i is the transmission ratio between the driving backup sprocket 60 and the driven backup sprocket 70;
Z1the number of teeth of the driving backup sprocket 60;
the above-mentioned relations (1) and (2) are derived by:
the length of the chain is as follows according to the mechanical design manual:
L＝LP·P (5)
the distance H between the initial position and the lowest position of the chain tensioner 40 and the length L of the drive chain 30 when the chain tensioner 40 is at the lowest position2Satisfies the following relation (6):
wherein R is1Is the radius of the drive sprocket 10 in m;
R2is the radius of the chain tensioner 40 in m;
R3is the radius of the driven sprocket 20 in m;
a is the vertical projection distance between the center of the driving sprocket 10 and the center of the chain tension pulley 40, and the unit is m;
b is the vertical projection distance of the chain tensioner 40 and the center of the driven sprocket 20, and the unit is m;
c is the height difference between the center of the chain tensioner 40 at the lowest position and the center of the drive sprocket 10;
h is the distance between the initial position and the lowest position of the chain tensioner 40 in m.
The above relationship (6) is derived by referring to FIG. 2, when the chain tensioner 40 is pressed down a distance H to an extreme position, at which time the total length L of the chain (L)2) Can be simply divided into 5 segments, respectively J1J2、J2J3、J3J4、J4J5、J5J1. The calculation of the length of each segment is as follows:
by the same token, J can be deduced2J3The length of (A) is as follows:
J4J5the length of (A) is as follows:
thus, the total length of the chain is:
L＝J1J2+J2J3+J3J4+J4J5+J5J1
the application method and the use principle of the double-chain wheel transmission mechanism are as follows:
first, the drive chain 30 is engaged with the drive sprocket 10 and the driven sprocket 20, and the chain tensioner 40 is engaged with the drive chain 30, so that the drive chain 30 is in a tensioned state; as the double sprocket transmission operates, the drive chain 30 is worn and gradually becomes longer, and at this time, the drive chain 30 is kept in a tensioned state by moving the chain tensioner 40 downward; the length of the driving chain 30 is continuously increased along with the continuous operation of the double chain wheel transmission mechanism, when the chain tensioning wheel 40 moves downwards along the vertical kidney-shaped hole 50 to the lowest position, the driving chain 30 is taken down, the driving chain 30 is meshed with the driving spare chain wheel 60 and the driven spare chain wheel 70, and the driving chain wheel consisting of the driving spare chain wheel 60, the driven spare chain wheel 70 and the driving chain 30 can continuously operate.
In general, the present invention is configured to form a double sprocket by using the driving sprocket 10, the driven sprocket 20, the driving backup sprocket 60 and the driven backup sprocket 70, engage the double sprocket by using the same driving chain 30, locate the chain tensioner 40 in the vertical kidney-shaped hole 50, and design the parameters of the size and length of each component according to the relations (1), (2) and (6). Under the condition that the wear of the driving chain 30 is not too long, the tension degree of the driving chain 30 can be adjusted by downwards adjusting the height of the chain tension pulley 40, so that the driving chain 30 is in a normal working state; when the chain tensioner 40 moves down to the lowest position, the drive chain 30 can be removed and engaged with the driving backup sprocket 60 and the driven backup sprocket 70, and the operation can be continued. By adopting the arrangement, the double-chain wheel transmission mechanism can effectively save the chain replacement time, reduce the fault maintenance time of the machine, reduce the labor intensity of a user and improve the working efficiency of the whole machine.
The double-chain wheel transmission mechanism can be applied to various mechanical equipment as a transmission mechanism, and is particularly suitable for agricultural machinery with complex operation environment and frequent chain replacement.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A double sprocket gear comprising:
the driving chain wheel (10), the said driving chain wheel (10) is fixedly mounted on driving drive shaft (110);
the driven chain wheel (20), the said driven chain wheel (20) is fixedly mounted on driven drive shaft (120);
a drive chain (30), the drive chain (30) being engageable with the drive sprocket (10) and the driven sprocket (20);
it is characterized in that the double-chain wheel transmission mechanism further comprises:
the chain tensioning wheel (40), the chain tensioning wheel (40) can be meshed with the driving chain (30), the chain tensioning wheel (40) is arranged in a vertical waist-shaped hole (50), and the chain tensioning wheel (40) can move up and down in the vertical waist-shaped hole (50) to adjust the tensioning degree of the driving chain (30);
a drive backup sprocket (60), the drive backup sprocket (60) being fixedly mounted on the drive shaft (110);
a driven backup sprocket (70), the driven backup sprocket (70) being fixedly mounted on the driven drive shaft (120);
the drive chain (30) is engageable with the driving backup sprocket (60) and the driven backup sprocket (70) when the chain tensioner (40) moves down along the vertical kidney-shaped hole (50) to a lowermost position;
an initial length L of the drive chain (30)1The following relation is satisfied:
wherein, L1Is the initial length of the drive chain (30) in m;
a is the center distance between the driving chain wheel (10) and the driven chain wheel (20) and the unit is m;
p is the chain pitch of the drive chain (30) in m;
i is the transmission ratio between the driving sprocket (10) and the driven sprocket (20);
Z1is the number of teeth of the driving sprocket (10);
when the chain tension pulley (40) moves downwards to the lowest position along the vertical waist-shaped hole (50), the chain tension pulley is arranged at the bottom of the vertical waist-shaped holeLength L of drive chain (30)2The following relation is satisfied:
wherein, L2The length of the driving chain (30) when the chain tension wheel (40) is located at the lowest position is m;
a is the center distance between the driving spare chain wheel (60) and the driven spare chain wheel (70), and the unit is m;
p is the chain pitch of the drive chain (30) in m;
i is the transmission ratio between the driving backup sprocket (60) and the driven backup sprocket (70);
Z1the number of teeth of the driving standby chain wheel (60);
a distance H between an initial position and a lowest position of the chain tensioner (40) and a length L of the drive chain (30) when the chain tensioner (40) is at the lowest position2Satisfies the following relation:
wherein R is1Is the radius of the driving chain wheel (10) and has the unit of m;
R2is the radius of the chain tension wheel (40) and has the unit of m;
R3is the radius of the driven sprocket (20) and has the unit of m;
a is the vertical projection distance between the driving chain wheel (10) and the center of the chain tensioning wheel (40), and the unit is m;
b is the vertical projection distance between the chain tensioning wheel (40) and the center of the driven chain wheel (20), and the unit is m;
c is the height difference between the center of the chain tension wheel (40) at the lowest position and the center of the driving chain wheel (10);
h is the distance between the initial position and the lowest position of the chain tensioner (40) and has the unit of m.
2. The double sprocket drive as set forth in claim 1, characterized in that the center distance between the driving backup sprocket (60) and the driven backup sprocket (70) is identical to the center distance between the driving sprocket (10) and the driven sprocket (20); the transmission ratio between the driving backup sprocket (60) and the driven backup sprocket (70) is identical to the transmission ratio between the driving sprocket (10) and the driven sprocket (20).
3. A method of using a double sprocket transmission according to any one of claims 1 to 2, comprising the steps of:
engaging the drive chain (30) with the drive sprocket (10) and the driven sprocket (20), and engaging the chain tensioner (40) with the drive chain (30);
the length of the driving chain (30) is gradually increased along with the operation of the double chain wheel transmission mechanism, and the driving chain (30) is kept in a tensioning state by moving the chain tensioning wheel (40) downwards;
the length of the drive chain (30) is continuously increased along with the continuous operation of the double-chain wheel transmission mechanism, when the chain tensioning wheel (40) moves downwards to the lowest position, the drive chain (30) is taken down, and the drive chain (30) is meshed with the driving spare chain wheel (60) and the driven spare chain wheel (70).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910361401.2A CN110043621B (en) | 2019-04-30 | 2019-04-30 | Double-chain-wheel transmission mechanism and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910361401.2A CN110043621B (en) | 2019-04-30 | 2019-04-30 | Double-chain-wheel transmission mechanism and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110043621A CN110043621A (en) | 2019-07-23 |
| CN110043621B true CN110043621B (en) | 2020-07-10 |
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| CN201910361401.2A Expired - Fee Related CN110043621B (en) | 2019-04-30 | 2019-04-30 | Double-chain-wheel transmission mechanism and application method thereof |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103109613A (en) * | 2011-11-16 | 2013-05-22 | 泰州樱田农机制造有限公司 | Side-arranged type double-chain transmission mechanism for tillage machine |
| CN204004229U (en) * | 2014-05-27 | 2014-12-10 | 楚天科技股份有限公司 | For the transmission device of pharmaceutical equipment |
| KR101659222B1 (en) * | 2015-03-31 | 2016-09-22 | 김종근 | Nonstep variable speed gear for bike |
| JP6428733B2 (en) * | 2016-09-13 | 2018-11-28 | トヨタ自動車株式会社 | Control device for chain belt type continuously variable transmission for vehicle |
| CN208763487U (en) * | 2018-08-20 | 2019-04-19 | 江苏一元泊车设备科技有限公司 | A kind of garage PCX pair of chain drive mechanism |
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