CN217644243U

CN217644243U - Eccentric rocker arm reciprocating mower driving device

Info

Publication number: CN217644243U
Application number: CN202221434204.2U
Authority: CN
Inventors: 史启明
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-10-25
Anticipated expiration: 2032-06-10

Abstract

The utility model discloses an eccentric rocker arm reciprocating mower driving device, the frame middle part is equipped with an eccentric shaft through hole, the small shaft end of the eccentric shaft passes through the eccentric shaft through hole and is connected with a belt pulley key, the big shaft end of the eccentric shaft is matched with an end cover through a first bearing, the end cover is fixedly connected with the frame, the big shaft end of the eccentric shaft is equipped with an eccentric shaft end matched with a connecting rod, and the center of the eccentric shaft end is a first axis; the eccentric shaft end is hinged with one end of a connecting rod through a second bearing, the other end of the connecting rod is hinged with the middle lower part of the rocker arm, and the connecting rod and the rocker arm are hinged at the second shaft center; the upper end of the rocker arm is hinged with the upper end of the base through a third bearing, and the hinged center of the upper end of the rocker arm is a third axis; the first axis is a first center distance to the second axis, the first axis is a second center distance to the third axis, and the second axis is a third center distance to the third axis. The device has the advantages of small vibration, high efficiency, long service life and the like.

Description

Eccentric rocker arm reciprocating mower driving device

Technical Field

The utility model relates to the technical field of agricultural machinery, concretely relates to reciprocating type lawn mower drive arrangement of eccentric rocking arm.

Background

As is known, the harvesting machinery plays an important role in agricultural machinery equipment, and the types of the harvesting machinery including a mower and a rod-shaped harvester are more, but the operation principle of the harvesting machinery is that a cutting knife of the harvester does plane linear reciprocating motion, rod-shaped crops are cut down and then subjected to subsequent processing procedures, so that a driving device which enables the cutting knife of the harvester to do the plane linear reciprocating motion is generally realized by changing rotary motion into linear motion through a crank-link mechanism by belt or gear transmission, and the driving device has the defects of narrow mowing function application range, rigid bottom connection between a knife rest and the cutting knife and high failure rate. Another novel structure is eccentric rocking arm drive arrangement, but the vibration of current eccentric rocking arm drive arrangement cutting knife is big, inefficiency and the life-span of being used is low, its reason is that the center distance of suspension center to the eccentric shaft of rocking arm, the distance of suspension center to connecting rod rocking arm pin joint of rocking arm, the center distance of connecting rod rocking arm pin joint to connecting rod and eccentric shaft, the proportion of three important distance, when the size sets up unreasonable cutting knife reciprocating motion that leads to, still do the high-low motion, from causing the vibration big, and then restricted mowing efficiency and life. Therefore, a novel eccentric rocker arm reciprocating mower driving device is urgently needed to optimize the key size of the existing device, so that the purposes of small vibration, high efficiency and long service life are achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a reciprocating type lawn mower drive arrangement of eccentric rocking arm reaches the purpose that reduces the vibration, promotes work efficiency and spare part life through optimizing the proportional relation and the size of the first center-to-center distance of critical dimension, second center-to-center distance, third center-to-center distance that eccentric shaft, connecting rod, rocking arm three formed to the big shortcoming of current drive arrangement's vibration.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a reciprocating type lawn mower drive arrangement of eccentric rocking arm, includes frame, eccentric shaft, connecting rod, rocking arm, its characterized in that: the lower end of the machine base is fixedly connected to the mower, an eccentric shaft through hole is formed in the middle of the machine base, the small shaft end of the eccentric shaft penetrates through the eccentric shaft through hole to be connected with the belt pulley key, the large shaft end of the eccentric shaft is matched with the end cover through a first bearing, the end cover is fixedly connected with the machine base, the large shaft end of the eccentric shaft is provided with an eccentric shaft end matched with the connecting rod, and the center of the eccentric shaft end is a first shaft center; the eccentric shaft end is hinged with one end of a connecting rod through a second bearing, the other end of the connecting rod is hinged with the middle lower part of the rocker arm, and the connecting rod and the rocker arm are hinged at the second shaft center; the upper end of the rocker arm is hinged with the upper end of the base through a third bearing, the hinged center of the upper end of the rocker arm is a third axis, and the lower end of the rocker arm is provided with a cutting knife mounting hole; the first axis to the second axis is a first center distance, the first axis to the third axis is a second center distance, the second axis to the third axis is a third center distance, the ratio range of the second center distance to the first center distance is 1.7-1.9, and the ratio range of the third center distance to the first center distance is 1.75-1.85.

Further preferably, the first center distance is 110.00 to 120.00 mm, the second center distance is 213.00 to 217.00 mm, and the third center distance is 205.00 to 210.00 mm.

Further preferably, the rocker arm is of a V-shaped structure.

The utility model has the advantages that:

the eccentric rocker arm reciprocating mower driving device optimizes a base structure compared with the prior art, so that the whole arrangement is more reasonable and simpler, the prior art only drives a rocker arm to swing through an eccentric shaft and a connecting rod, the upper end of the rocker arm is hinged right above a base, a cutting knife is arranged at the lower end of the rocker arm, a belt pulley drives the eccentric shaft to rotate, and the rocker arm is driven to swing through the connecting rod, so that the reciprocating swing of the cutting knife is realized, the relative position relation and the size design among the base, the eccentric shaft, the connecting rod and the rocker arm are unreasonable, the reciprocating swing angle of the rocker arm is large, the lower end of the rocker arm moves up and down in the swinging process, the vibration of the whole device is large, the rotation speed of the belt pulley is limited due to large vibration, the improvement of mowing efficiency is further influenced, meanwhile, the service life of each component is greatly shortened due to large vibration, the use cost of farmers is increased, in order to solve the problem, the technical characteristics of the application are that the relative position relation of each component is optimized, namely, the ratio range of a second center distance to a first center distance to a second center distance is 1.75-1.85.00 mm, a second center distance is a third center distance, and a fourth center distance is a fourth center distance of 210.00-205.00 mm, wherein the fourth center distance is a third center distance of a fourth center distance of 210.00 mm, and a fourth center distance of a fourth mm. The other end of the connecting rod is hinged with the middle lower part of the rocker arm to replace the original hinged structure of the other end of the connecting rod and the middle part of the rocker arm. The rocker arm is of a V-shaped structure, the size of the rocker arm is designed to be minimum under the condition that the requirement of the reciprocating motion stroke of the cutting knife is met, and then the size design of the minimum size of the whole machine is achieved, so that the vibration of the whole machine is reduced to be minimum, the working efficiency is improved by increasing the rotating speed of the belt pulley, the service life of parts is prolonged, and the rocker arm is more convenient to popularize and apply in the market.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is the structure schematic diagram of the assembly state of the machine base and the eccentric shaft of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a machine base; 2. a belt pulley; 3. the upper end of the rocker arm is hinged with a shaft; 4. an end cap; 5. an eccentric shaft; 6. an eccentric shaft end; 7. a rocker arm; 8. a connecting rod rocker arm hinge shaft; 9. a cutting knife mounting hole; 10. a connecting rod.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 and 2, the present embodiment includes a base 1, an eccentric shaft 5, a connecting rod 10, a rocker arm 7, a belt pulley 2, a bolt hole is arranged at the lower end of the base 1, the base can be fixedly connected to a mower, an eccentric shaft passing hole is arranged at the middle part of the base 1, a small shaft end of the eccentric shaft 5 passes through the eccentric shaft passing hole and is connected with the belt pulley 2 through a key connection, a large shaft end of the eccentric shaft 5 is matched with an end cover 4 through a first bearing, the end cover 4 is connected with the base 1 through a bolt assembly, so that the eccentric shaft 5 is fixed on the base 1, an eccentric shaft end 6 matched with the connecting rod 10 is arranged at the large shaft end of the eccentric shaft 5, and the center of the eccentric shaft end 6 is a first shaft center; the eccentric shaft end 6 is hinged with one end of a connecting rod 10 through a second bearing, the other end of the connecting rod 10 is hinged with the middle lower part of the rocker arm 7 through a connecting rod rocker arm hinge shaft 8, and the hinge center of the connecting rod 10 and the rocker arm 7 is a second shaft center; the upper end of the rocker arm 7 is hinged with a rocker arm upper end hinge shaft 3 arranged at the upper end of the machine base through a third bearing, the upper end hinge center of the rocker arm 7 is a third axis, and the lower end of the rocker arm 7 is provided with a cutting knife mounting hole 9; the first axis to the second axis is a first center distance, the first axis to the third axis is a second center distance, the second axis to the third axis is a third center distance, the ratio range of the second center distance to the first center distance is 1.7-1.9, and the ratio range of the third center distance to the first center distance is 1.75-1.85. The first center distance is 110.00-120.00 mm, the second center distance is 213.00-217.00 mm, and the third center distance is 205.00-210.00 mm. The other end of the connecting rod 10 is hinged with the middle lower part of the rocker arm 7 to replace the original hinged structure of the other end of the connecting rod 10 and the middle part of the rocker arm 7. Rocker 7 is V type structure and designs the rocking arm size to the minimum under the demand that satisfies cutting knife reciprocating motion stroke, and then reaches the minimum size design of complete machine to it is minimum to make the complete machine vibration reduce, promotes work efficiency through promoting the belt pulley rotational speed, and has prolonged the life of spare part, the marketing of being convenient for more is used.

The embodiment is only an illustration of the concept and implementation of the present invention, and is not a limitation, and the technical solution without substantial transformation is still within the protection scope under the concept of the present invention.

Claims

1. The utility model provides a reciprocating mower drive arrangement of eccentric rocking arm, includes frame, eccentric shaft, connecting rod, rocking arm, its characterized in that: the lower end of the machine base is fixedly connected to the mower, an eccentric shaft through hole is formed in the middle of the machine base, a small shaft end of the eccentric shaft penetrates through the eccentric shaft through hole to be connected with a belt pulley key, a large shaft end of the eccentric shaft is matched with the end cover through a first bearing, the end cover is fixedly connected with the machine base, an eccentric shaft end matched with the connecting rod is arranged at the large shaft end of the eccentric shaft, and the center of the eccentric shaft end is a first axis; the eccentric shaft end is hinged with one end of a connecting rod through a second bearing, the other end of the connecting rod is hinged with the middle lower part of the rocker arm, and the connecting rod and the rocker arm are hinged at the second shaft center; the upper end of the rocker arm is hinged with the upper end of the base through a third bearing, the hinged center of the upper end of the rocker arm is a third axis, and the lower end of the rocker arm is provided with a cutting knife mounting hole; the first axis to the second axis is a first center distance, the first axis to the third axis is a second center distance, the second axis to the third axis is a third center distance, the ratio range of the second center distance to the first center distance is 1.7-1.9, and the ratio range of the third center distance to the first center distance is 1.75-1.85.

2. The eccentric rocker arm reciprocating mower drive of claim 1, wherein: the first center distance is 110.00-120.00 mm, the second center distance is 213.00-217.00 mm, and the third center distance is 205.00-210.00 mm.

3. The eccentric rocker reciprocating mower drive of claim 1 wherein: the rocker arm is of a V-shaped structure.