阅读说明：本技术 一种花生收割设备 (Peanut harvesting equipment ) 是由 刘后波 于 2021-01-15 设计创作，主要内容包括：本发明公开了一种花生收割设备,包括地面,所述地面上侧设有调节机构,所述调节机构包括嵌设于车体内部调节液压缸,是调节液压缸控制有调节液压杆,所述调节液压杆下端固定设有调节铰接杆,本发明可利用调节机构对花生收割深度进行调节,可适应于多种地质的花生收割,便于彻底收割花生,利用分拣机构对花生与花生秧进行分拣,便于直接收获花生,减少二次劳动,效率较高,利用清理机构对花生秧进行清理,保证分拣机构的连续运行。整体设计本发明成本较低,结构简单,自动化程度高,适用于大面积推广。(The invention discloses peanut harvesting equipment which comprises a ground, wherein an adjusting mechanism is arranged on the upper side of the ground, the adjusting mechanism comprises an adjusting hydraulic cylinder embedded in a vehicle body, the adjusting hydraulic cylinder controls an adjusting hydraulic rod, and an adjusting hinge rod is fixedly arranged at the lower end of the adjusting hydraulic rod. The invention has the advantages of low cost, simple structure, high automation degree and suitability for large-area popularization.)

1. A peanut harvesting apparatus, comprising a ground characterized in that: the upper side of the ground is provided with an adjusting mechanism, the adjusting mechanism comprises an adjusting hydraulic cylinder embedded in a vehicle body, the adjusting hydraulic cylinder is controlled by the adjusting hydraulic cylinder to form an adjusting hydraulic rod, the lower end of the adjusting hydraulic rod is fixedly provided with an adjusting hinge rod, the adjusting hinge rod is rotationally connected with a harvesting motor shaft, the harvesting motor shaft is controlled by a harvesting motor to rotate, the harvesting motor is embedded in a movable base, the movable base is internally provided with a movable chute, the movable chute is internally provided with a limiting block in a sliding manner, the rear end of the limiting block is fixedly connected with the inner wall of the rear side of a separation cavity, the separation cavity is provided with the interior of the vehicle body, the middle part of the harvesting motor shaft is fixedly provided with a harvesting wheel, the outer side of the harvesting wheel is provided with a harvesting belt in a friction manner, the outer side of the harvesting belt is fixedly, the two harvesting sliding blocks move away from each other, a harvesting pressure spring is fixedly arranged on each harvesting sliding block, a harvesting rod is fixedly arranged at one end of each harvesting sliding block, which is away from the harvesting base, the harvesting rods are used for harvesting peanuts, and the sorting mechanism is used for adjusting the harvesting depth of the peanuts;

the peanut seedling sorting device is characterized in that a sorting mechanism is arranged on the left side of the adjusting mechanism, the sorting mechanism comprises a sorting motor embedded in the vehicle body, a sorting motor shaft is controlled by the sorting motor, a sorting shaft is fixedly arranged at the rear end of the sorting motor shaft, a sorting wheel is fixedly arranged in the middle of the sorting shaft, a plurality of sorting rods are fixedly arranged on the outer sides of the sorting wheels, the sorting rods are used for separating two adjacent harvesting rods and separating peanut seedlings clamped by the two adjacent harvesting rods, the sorting rods can also separate peanuts from the peanut seedlings through sorting grooves, the sorting grooves are formed in the inner wall of the lower side of the separating cavity and penetrate through the inner wall of the lower side of the separating cavity, and the sorting mechanism is used for sorting the peanuts;

the rear side of the sorting mechanism is provided with a cleaning mechanism, the cleaning mechanism comprises a driving bevel gear fixedly connected with a rear shield of the sorting shaft, the driving bevel gear is meshed with a driven bevel gear, the driven bevel gear is fixedly connected with a driving belt shaft, the driving belt shaft is also fixedly connected with a driving belt wheel, two ends of the driving belt shaft are respectively rotatably connected with inner walls on two sides of a transmission cavity, the transmission cavity is arranged in the vehicle body, a triangular belt is arranged on the outer side of the driving belt wheel in a friction mode, the triangular belt is in friction connection with a reciprocating disc, the reciprocating disc is rotatably connected with a driven belt shaft, two ends of the driven belt shaft are respectively rotatably connected with inner walls on two sides of the transmission cavity, a reciprocating shaft is fixedly arranged at the right end of the reciprocating disc, the reciprocating shaft is slidably connected with a reciprocating chute, a reciprocating slide bar is arranged in the reciprocating slide bar, and a reciprocating slide block, reciprocating slide block and reciprocating slide bar sliding connection, reciprocating slide bar has been seted up inside the automobile body, the fixed connecting block that is equipped with of reciprocating slide block lower extreme, the fixed clearance pole that is equipped with in connecting block front end, the inside rotation of clearance pole is equipped with the trip shaft, the trip shaft still rotates with the trip shaft to be connected, the trip shaft outside is equipped with the upset torsional spring, upset torsional spring both ends respectively with clearance pole with trip shaft fixed connection, clearance mechanism is used for clearing up the peanut seedling in the letter sorting pole outside.

2. A peanut harvesting device as claimed in claim 1, wherein: the peanut harvester is characterized in that a collecting box is fixedly arranged at the left end of the harvester body, a collecting cavity is formed in the collecting box, and the collecting cavity is used for collecting peanuts.

3. A peanut harvesting device as claimed in claim 1, wherein: the reciprocating motion of the cleaning rod is indirectly controlled by the sorting motor shaft, and peanut seedlings between two adjacent sorting rods can be accurately cleaned and do not collide with the sorting rods after the cleaning rod and the sorting motor shaft are converted by the gear mechanism and the belt wheel mechanism.

4. A peanut harvesting device as claimed in claim 1, wherein: the driving bevel gear is fixedly provided with a weeding wheel between the inner wall of the front side of the driving cavity, the outer side of the weeding wheel is rotatably provided with six weeding shafts, the rear side of the weeding shaft is rotatably provided with a weeding rod, the outer side of the weeding shaft is provided with a weeding torsional spring, and two ends of the weeding torsional spring are respectively fixedly connected with the weeding rod and the weeding wheel.

5. A peanut harvesting device as claimed in claim 1, wherein: the fixed right baffle that is equipped with of separation chamber upside inner wall lower extreme, the inside initiative motor that is equipped with of right baffle, initiative motor control has the initiative motor shaft, the fixed action wheel that is equipped with in initiative motor shaft front end, the friction of action wheel outside is equipped with the drive belt, the friction of drive belt downside is equipped with from the driving wheel, from driving wheel and driven shaft fixed connection, the fixed initiative gyro wheel that is equipped with in driven shaft rear end, the initiative gyro wheel can the ground under end face contact rolls, the driven shaft rotates with the support to be connected, the support upper end with automobile body lower extreme fixed connection.

6. A peanut harvesting device as claimed in claim 1, wherein: and a support wheel is fixedly arranged on the lower left end face of the vehicle body and is used for supporting the vehicle body and rolling in contact with the upper end face of the ground.

Technical Field

The invention relates to the field of harvesters, in particular to peanut harvesting equipment.

Background

Peanuts are a high-yield crop and are particularly planted in large quantities in the north, but harvesting of peanuts is a heavy field job. The mode that present peanut reaped has two kinds, one kind is artifical and reaps, and artifical the reaping is wasted time and energy, and another kind is machinery and reaps, and large-scale machinery is not suitable for the small size and reaps, and the small-size machinery needs the manual work to concentrate the peanut and makes peanut and peanut seedling separate through the manual work, increases secondary work, consequently sorts peanut and peanut seedling when how high-efficient quick reaping the peanut still need constantly to study.

Disclosure of Invention

The invention aims to solve the technical problem of providing peanut harvesting equipment to overcome the problem.

The invention is realized by the following technical scheme.

The invention relates to peanut harvesting equipment which comprises a ground, wherein an adjusting mechanism is arranged on the upper side of the ground, the adjusting mechanism comprises an adjusting hydraulic cylinder embedded in a vehicle body, an adjusting hydraulic rod is controlled by the adjusting hydraulic cylinder, an adjusting hinge rod is fixedly arranged at the lower end of the adjusting hydraulic rod, the adjusting hinge rod is rotationally connected with a harvesting motor shaft, the harvesting motor shaft is controlled by a harvesting motor to rotate, the harvesting motor is embedded in a movable base, a movable chute is arranged in the movable base, a limiting block is slidably arranged in the movable chute, the rear end of the limiting block is fixedly connected with the inner wall of the rear side of a separation cavity, the separation cavity is arranged in the vehicle body, a harvesting wheel is fixedly arranged in the middle of the harvesting motor shaft, a harvesting belt is arranged outside the harvesting wheel in a friction mode, a plurality of harvesting bases are fixedly arranged outside the harvesting belt, and a harvesting, two harvesting sliding blocks are slidably arranged in the harvesting sliding groove, a harvesting pressure spring is fixedly arranged on each of the two harvesting sliding blocks in a moving mode away from each other, a harvesting rod is fixedly arranged at one end, away from the harvesting base, of each harvesting sliding block, the harvesting rod is used for harvesting peanuts, and the sorting mechanism is used for adjusting the harvesting depth of the peanuts;

the peanut seedling sorting device is characterized in that a sorting mechanism is arranged on the left side of the adjusting mechanism, the sorting mechanism comprises a sorting motor embedded in the vehicle body, a sorting motor shaft is controlled by the sorting motor, a sorting shaft is fixedly arranged at the rear end of the sorting motor shaft, a sorting wheel is fixedly arranged in the middle of the sorting shaft, a plurality of sorting rods are fixedly arranged on the outer sides of the sorting wheels, the sorting rods are used for separating two adjacent harvesting rods and separating peanut seedlings clamped by the two adjacent harvesting rods, the sorting rods can also separate peanuts from the peanut seedlings through sorting grooves, the sorting grooves are formed in the inner wall of the lower side of the separating cavity and penetrate through the inner wall of the lower side of the separating cavity, and the sorting mechanism is used for sorting the peanuts;

the rear side of the sorting mechanism is provided with a cleaning mechanism, the cleaning mechanism comprises a driving bevel gear fixedly connected with a rear shield of the sorting shaft, the driving bevel gear is meshed with a driven bevel gear, the driven bevel gear is fixedly connected with a driving belt shaft, the driving belt shaft is also fixedly connected with a driving belt wheel, two ends of the driving belt shaft are respectively rotatably connected with inner walls on two sides of a transmission cavity, the transmission cavity is arranged in the vehicle body, a triangular belt is arranged on the outer side of the driving belt wheel in a friction mode, the triangular belt is in friction connection with a reciprocating disc, the reciprocating disc is rotatably connected with a driven belt shaft, two ends of the driven belt shaft are respectively rotatably connected with inner walls on two sides of the transmission cavity, a reciprocating shaft is fixedly arranged at the right end of the reciprocating disc, the reciprocating shaft is slidably connected with a reciprocating chute, a reciprocating slide bar is arranged in the reciprocating slide bar, and a reciprocating slide block, reciprocating slide block and reciprocating slide bar sliding connection, reciprocating slide bar has been seted up inside the automobile body, the fixed connecting block that is equipped with of reciprocating slide block lower extreme, the fixed clearance pole that is equipped with in connecting block front end, the inside rotation of clearance pole is equipped with the trip shaft, the trip shaft still rotates with the trip shaft to be connected, the trip shaft outside is equipped with the upset torsional spring, upset torsional spring both ends respectively with clearance pole with trip shaft fixed connection, clearance mechanism is used for clearing up the peanut seedling in the letter sorting pole outside.

Preferably, a collecting box is fixedly arranged at the left end of the vehicle body, a collecting cavity is formed in the collecting box, and the collecting cavity is used for collecting peanuts.

Preferably, the reciprocating motion of the cleaning rod is indirectly controlled by the sorting motor shaft, and peanut seedlings between two adjacent sorting rods can be accurately cleaned and do not collide with the sorting rods after the cleaning rod and the sorting motor shaft are converted by the gear mechanism and the belt wheel mechanism.

Preferably, the transmission chamber front side inner wall with the fixed weed removal wheel that is equipped with between the drive bevel gear, the rotation of weed removal wheel outside is equipped with six weeding axles, the rotation of weeding axle rear side is equipped with the weeder pole, the weeding off-axial side is equipped with the weeding torsional spring, weeding torsional spring both ends respectively with the weeder pole with weed removal wheel fixed connection.

Preferably, the fixed right baffle that is equipped with of separation chamber upside inner wall lower extreme, the inside initiative motor that is equipped with of right baffle, initiative motor control has the initiative motor shaft, the fixed action wheel that is equipped with in initiative motor shaft front end, the friction of action wheel outside is equipped with the drive belt, the friction of drive belt downside is equipped with from the driving wheel, from driving wheel and driven shaft fixed connection, the fixed initiative gyro wheel that is equipped with in driven shaft rear end, the initiative gyro wheel can the ground under end face contact rolls, the driven shaft rotates with the support to be connected, the support upper end with automobile body lower extreme fixed connection.

Preferably, a support wheel is fixedly arranged on the left lower end face of the vehicle body, and the support wheel is used for supporting the vehicle body and is in contact rolling with the upper end face of the ground.

The invention has the beneficial effects that: the peanut harvesting depth can be adjusted by the adjusting mechanism, the peanut harvesting depth adjusting mechanism is suitable for harvesting peanuts in various geologies, the peanuts can be conveniently and thoroughly harvested, the sorting mechanism is used for sorting the peanuts and the peanut seedlings, the peanuts can be conveniently and directly harvested, secondary labor is reduced, the efficiency is high, the peanut seedlings are cleaned by the cleaning mechanism, and the continuous operation of the sorting mechanism is guaranteed. The invention has the advantages of low cost, simple structure, high automation degree and suitability for large-area popularization.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the embodiment of the present invention at A in FIG. 1;

FIG. 3 is a schematic view of the embodiment of the present invention in the direction B-B in FIG. 2;

FIG. 4 is a schematic view of the embodiment of the present invention in the direction of C-C in FIG. 2;

FIG. 5 is a schematic view of the embodiment of the present invention in the direction D-D in FIG. 4;

FIG. 6 is a schematic view of the embodiment of the present invention in the direction E-E of FIG. 4;

FIG. 7 is a schematic view of the embodiment of the present invention in the direction F-F shown in FIG. 6.

Detailed Description

The invention will now be described in detail with reference to fig. 1-7, wherein for ease of description the orientations described below are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

Referring to the accompanying drawings 1-7, the peanut harvesting device comprises a ground 10, an adjusting mechanism 62 is arranged on the upper side of the ground 10, the adjusting mechanism 62 comprises an adjusting hydraulic cylinder 20 embedded in a vehicle body 19, an adjusting hydraulic rod 21 is controlled by the adjusting hydraulic cylinder 20, an adjusting hinge rod 22 is fixedly arranged at the lower end of the adjusting hydraulic rod 21, the adjusting hinge rod 22 is rotatably connected with a harvesting motor shaft 23, the harvesting motor shaft 23 is controlled by a harvesting motor 24 to rotate, the harvesting motor 24 is embedded in a movable base 26, a movable sliding chute 27 is arranged in the movable base 26, a limiting block 28 is slidably arranged in the movable sliding chute 27, the rear end of the limiting block 28 is fixedly connected with the inner wall of the rear side of a separation cavity 31, the separation cavity 31 is arranged in the vehicle body 19, a harvesting wheel 25 is fixedly arranged in the middle of the harvesting motor shaft 23, and a harvesting belt 69 is arranged on the outer side of, a plurality of harvesting bases 29 are fixedly arranged on the outer side of the harvesting belt 69, a harvesting chute 67 is formed in the harvesting base 29, two harvesting sliders 65 are slidably arranged in the harvesting chute 67, a harvesting pressure spring 66 is fixedly arranged on each of the two harvesting sliders 65 in a moving manner away from each other, a harvesting rod 30 is fixedly arranged at one end of each harvesting slider 65 away from the harvesting base 29, the harvesting rods 30 are used for harvesting peanuts, and the sorting mechanism 63 is used for adjusting the harvesting depth of the peanuts;

a sorting mechanism 63 is arranged on the left side of the adjusting mechanism 62, the sorting mechanism 63 comprises a sorting motor 54 embedded in the vehicle body 19, the sorting motor 54 controls a sorting motor shaft 55, a sorting shaft 38 is fixedly arranged at the rear end of the sorting motor shaft 55, a sorting wheel 37 is fixedly arranged in the middle of the sorting shaft 38, a plurality of sorting rods 36 are fixedly arranged on the outer side of the sorting wheel 37, the sorting rods 36 are used for separating two adjacent harvesting rods 30 and separating peanut seedlings clamped by the two adjacent harvesting rods 30, the sorting rods 36 can also separate peanuts from the peanut seedlings through sorting grooves 35, the sorting grooves 35 are formed in the inner wall of the lower side of the separating cavity 31 and penetrate through the inner wall of the lower side of the separating cavity 31, and the sorting mechanism 63 is used for sorting peanuts;

the rear side of the sorting mechanism 63 is provided with a cleaning mechanism 64, the cleaning mechanism 64 comprises a driving bevel gear 52 fixedly connected with the rear shield of the sorting shaft 38, the driving bevel gear 52 is engaged with a driven bevel gear 51, the driven bevel gear 51 is fixedly connected with a driving belt shaft 50, the driving belt shaft 50 is also fixedly connected with a driving belt wheel 49, two ends of the driving belt shaft 50 are respectively rotatably connected with the inner walls of two sides of a transmission cavity 53, the transmission cavity 53 is opened inside the vehicle body 19, the outer side of the driving belt wheel 49 is frictionally provided with a triangular belt 48, the triangular belt 48 is frictionally connected with a reciprocating disc 46, the reciprocating disc 46 is rotatably connected with a driven belt shaft 47, two ends of the driven belt shaft 47 are respectively rotatably connected with the inner walls of two sides of the transmission cavity 53, the right end of the reciprocating disc 46 is fixedly provided with a reciprocating shaft 45, and the reciprocating shaft 45 is slidably connected with a reciprocating chute 44, inside reciprocal slide bar 43 had been seted up to reciprocal spout 44, reciprocal slide bar 43 lower extreme is fixed and is equipped with reciprocal slider 42, reciprocal slider 42 and reciprocal slide bar 43 sliding connection, reciprocal slide bar 43 has been seted up inside automobile body 19, reciprocal slider 42 lower extreme is fixed and is equipped with connecting block 41, the fixed clearance pole 39 that is equipped with in connecting block 41 front end, the inside rotation of clearance pole 39 is equipped with trip shaft 61, trip shaft 61 still rotates with trip rod 40 to be connected, the trip shaft 61 outside is equipped with upset torsional spring 60, upset torsional spring 60 both ends respectively with clearance pole 39 with trip rod 40 fixed connection, clearance mechanism 64 is used for clearing up the peanut seedling in the letter sorting pole 36 outside.

Beneficially, the left end of the vehicle body 19 is fixedly provided with a collecting box 32, a collecting cavity 33 is formed inside the collecting box 32, and the collecting cavity 33 is used for collecting peanuts.

Advantageously, the reciprocating motion of the cleaning rod 39 is indirectly controlled by the sorting motor shaft 55, and the peanut seedlings between two adjacent sorting rods 36 can be accurately cleaned after the cleaning rod 39 and the sorting motor shaft 55 are switched by the gear mechanism and the pulley mechanism without colliding with the sorting rods 36.

Beneficially, a weeding wheel 56 is fixedly arranged between the inner wall of the front side of the transmission cavity 53 and the drive bevel gear 52, six weeding shafts 58 are rotatably arranged on the outer side of the weeding wheel 56, a weeding rod 57 is rotatably arranged on the rear side of the weeding shaft 58, a weeding torsion spring 59 is arranged on the outer side of the weeding shaft 58, and two ends of the weeding torsion spring 59 are respectively and fixedly connected with the weeding rod 57 and the weeding wheel 56.

Beneficially, separation chamber 31 upside inner wall lower extreme is fixed and is equipped with right baffle 18, right baffle 18 is inside to be inlayed and is equipped with driving motor 17, driving motor 17 control has driving motor shaft 16, driving wheel 15 is fixed and is equipped with in driving motor shaft 16 front end, driving wheel 15 outside friction is equipped with drive belt 14, drive belt 14 downside friction is equipped with from the driving wheel 13, from driving wheel 13 and driven shaft 68 fixed connection, driven shaft 68 rear end is fixed and is equipped with driving roller 11, driving roller 11 can ground 10 lower extreme face contact rolls, driven shaft 68 is connected with support 12 is rotated, support 12 upper end with automobile body 19 lower extreme fixed connection.

Advantageously, a support wheel 34 is fixedly arranged on the lower left end face of the vehicle body 19, and the support wheel 34 is used for supporting the vehicle body 19 and rolling in contact with the upper end face of the ground 10.

Initial state: the weeding torsion spring 59 turns the torsion spring 60, and the harvesting compression spring 66 is in a normal state.

The using method comprises the following steps: when peanuts need to be harvested, the adjusting hydraulic cylinder 20 controls the adjusting hinge rod 22 to move up and down through the adjusting hydraulic rod 21, the adjusting hinge rod 22 and the harvesting motor 24 drive the movable base 26 to move up and down through the harvesting motor shaft 23, the limiting block 28 slides relative to the movable sliding chute 27, the height of the movable base 26 is adjusted, the harvesting motor 24 controls the harvesting wheel 25 to rotate through the harvesting motor shaft 23, the harvesting wheel 25 drives the harvesting bases 29 to move through a harvesting belt 69, the limiting block 28 drives the harvesting rod 30 to rotate through a harvesting slider 65, the driving motor 17 controls the driving wheel 15 to rotate through the driving motor shaft 16, the driving wheel 15 transmits power to the driven wheel 13 through the transmission belt 14, the driven wheel 13 drives the driving roller 11 to rotate through the driven shaft 68, the driving roller 11 is in contact with the upper end face of the ground 10 to roll;

in the process that the vehicle body 19 moves rightwards and the harvesting rods 30 rotate, the harvesting rods 30 are in contact with and hook peanut seedlings, the two harvesting compression springs 66 are compressed, the two harvesting rods 30 clamp the peanut seedlings under the action of the elastic forces of the harvesting compression springs 66, the peanut seedlings rotate along with the harvesting rods 30, the sorting motor 54 controls the sorting shaft 38 to rotate through the sorting motor shaft 55, the sorting shaft 38 drives the sorting rods 36 to rotate through the sorting wheels 37, the sorting rods 36 successively enable the two adjacent harvesting rods 30 to separate and take away the peanut seedlings between the two adjacent harvesting rods 30, the sorting rods 36 drive the peanut seedlings to pass through the sorting grooves 35, the peanuts cannot stay in the separation cavity 31 through the sorting grooves 35 and slide down to the collection cavity 33 under the action of gravity, and the peanut collection is completed;

during the peanut collecting process, the peanut seedlings move to the lower side of the vehicle body 19 along with the sorting rod 36, meanwhile, the sorting shaft 38 drives the driven bevel gear 51 to rotate through the driving bevel gear 52, the driven bevel gear 51 is driven to the reciprocating disc 46 through the driving belt wheel 49 and the triangular belt 48, the reciprocating disc 46 drives the reciprocating slide rod 43 to reciprocate back and forth through the reciprocating shaft 45, the reciprocating slide rod 43 drives the cleaning rod 39 to reciprocate back and forth through the reciprocating slide block 42 and the connecting block 41, the cleaning rod 39 drives the turning rod 40 to reciprocate back and forth through the turning shaft 61, the turning rod 40 turns over and resets after moving forward and contacting with the peanut seedlings, the turning torsion spring 60 resets after compressing, the turning rod 40 moves backward to drive the peanut seedlings to move backward, the peanut seedlings are accumulated at the rear side of the turning rod 40, the sorting shaft 38 drives the weeding wheel 56 to rotate, the weeding wheel 56 drives the weeding rod 57 to rotate through the weeding shaft 58, the weeding rod 57 pulls the peanut seedlings at the rear side of the turning rod 40 away from the cleaning rod, the weeding rod 57 is continuously contacted with the inner wall of the transmission cavity 53, the peanut seedlings outside the weeding rod 57 are peeled off and fall on the upper end surface of the ground 10 under the action of gravity, the weeding torsion spring 59 is continuously compressed and then reset, and the cleaning of the peanut seedlings is finished.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.