A composite mechanical weeder

Abstract

The invention discloses a composite mechanical weeder in the technical field of agricultural machinery, comprising a frame, a plurality of vertical rods are arranged at the front of the frame, a movable frame is hinged at the lower part of the vertical rod, the lower part of the movable frame is rotatably connected with a connecting shaft, a plurality of loosening plates are arranged on the connecting shaft, and a reset tension spring connected to the frame is connected at an upward end of the movable frame, a connecting rod one which corresponds to the vertical rod one by one and can swing back and forth is connected to the frame behind the vertical rod, a weeding shovel is connected to the connecting rod one, at least one group of weeding components one is arranged on the lower side of the weeding shovel, the weeding component one includes a plurality of weeding teeth one arranged in the same row, a connecting rod two which corresponds to the connecting rod one by one is connected to the frame behind the connecting rod one, a grass pressing shovel is connected below the connecting rod two, and at least one group of grass pressing components one is arranged on the lower side of the grass pressing shovel, and the grass pressing component one includes a plurality of grass pressing teeth one arranged in the same row; the invention has a simple structure, can weed between rows, and has a good weeding effect.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a composite mechanical weeder. Background Art

[0002] Weeding is an important task in field operations. In traditional technology, herbicides are usually used for weeding, which is time-consuming, labor-intensive and costly. The development and use of various weeding machines have become important tools for field weeding. In the prior art, a patent named "Attached Dry Field Weeder" with a publication number of TWM541193U and a publication date of 2017.05.11 is disclosed. The weeder includes a weeding group, which is a buffer seat composed of a walking wheel, a plowshare, a weeding rake and a weeding claw arranged downward from the front to the back. The plowshare can dig deep into the soil by the traction of the power machine, and then the weeding rake breaks the soil and digs the grass. The rear weeding claw collects and drags the weeds, thereby achieving dry field weeding. This weeding technology is suitable for weeding when there are no crops in the field. When there are crops in the field, weeding cannot be done. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a composite mechanical weeder to solve the technical problem that weeding cannot be done when there are crops in the field. The present invention has a simple structure and can weed between rows with good weeding effect.

[0004] The object of the present invention is achieved in this way: a composite mechanical weeder comprises a frame, a plurality of vertical rods are arranged at the front part of the frame, a movable frame is hinged at the lower part of the vertical rod, the lower part of the movable frame is rotatably connected with a connecting shaft, a plurality of loosening plates are arranged on the outer periphery of the connecting shaft, an upward end of the movable frame is connected with a reset spring, the upper end of the reset spring is connected to the frame, a connecting rod which can swing back and forth in a left and right direction corresponding to the position of the vertical rod is connected to the frame behind the vertical rod, a weeding shovel is connected to the connecting rod, at least one group of weeding components is arranged on the lower side of the weeding shovel, the weeding component includes a plurality of weeding teeth arranged in the same row, a connecting rod 2 which corresponds to the position of the connecting rod 1 in the left and right direction is connected to the frame behind the connecting rod 1, a grass pressing shovel is connected below the connecting rod 2, at least one group of grass pressing components is arranged on the lower side of the grass pressing shovel, and the grass pressing component includes a plurality of grass pressing teeth arranged in the same row.

[0005] In the present invention, the frame is connected to the rear of the walking device, and the speed of the reciprocating movement of the connecting rod 1 is greater than the speed of the walking device; the number of connecting rods 1 is set according to actual conditions, and each weeding shovel is in the row, and the weeding teeth 1 include a weeding part 1 fixed to the lower side of the weeding shovel and inclined downward from front to back, and the rear side of the weeding part 1 is connected to a weeding part 2 extending backward and upward, and the upper side of the weeding part 2 is fixed to the lower side of the weeding shovel; the weed pressing shovel provides support for the movable frame and limits the depth of the loosening plate 1 loosening the soil; in the natural state, the connecting rod 1 The first and second connecting rods are in a vertical state, and each tension spring is in a stretched state; when working, the loosening plate one rotates forward with the walking device, and the loosening plate one loosens the soil in the working field first, and then the connecting rod one swings back and forth, and the connecting rod one drives the weeding shovel to swing back and forth, and the weeding teeth one continuously swings back and forth to remove the grass. The specific removal process is that the weeding part one moves forward, and the weeding part one presses the grass and loosens the grass at the same time, and the weeding part two moves backward, and the weeding part two presses the grass and further separates the grass from the soil, and the weeding shovel is used in the field where the soil is loosened. The grass pressing shovel moves forward and the grass is pressed to the lower side of the grass pressing shovel. The grass pressing teeth further press the pulled grass into the soil to further weed. In the weeding process, when encountering resistance such as climbing, the loosening plate senses the change in terrain and swings backward, the movable frame swings backward, the upper part of the movable frame will tilt downward, the reset spring stretches downward, and the grass pressing shovel swings backward. After crossing the resistance, the movable frame is reset under the action of the reset spring and fits to the forward side of the vertical pole. The grass pressing shovel is reset, and the loosening plate and the grass pressing shovel are adjusted according to the change in terrain. The position of the shovel will change adaptively, further improving the weeding effect and increasing the service life of each component. The present invention has a simple structure, firstly loosens the soil between the rows through a pair of loosening plates, and the weeding shovel continuously reciprocates back and forth. The combination of the weeding part one and the weeding part two continuously presses the grass and then separates the grass from the loosened soil, making weeding easier and improving the weeding effect. The combined arrangement of the weed pressing shovel and the weed pressing teeth presses the pulled grass into the soil, further improving the weeding effect. The present invention can be applied to weeding between rows, and is particularly suitable for weeding in paddy fields.

[0006] In order to further avoid missing weeds, at least one weeding component 2 is arranged on the lower side of the weeding shovel. The weeding component 2 includes a plurality of weeding teeth 2 arranged in the same row. The weeding teeth 1 and 2 are staggered in the left and right directions.

[0007] In order to further adjust the height of the weeding shovel, an intermediate rod is connected inside the connecting rod, and a plurality of adjustment holes are arranged in the height direction of the intermediate rod. A connecting hole which is coaxial with the adjustment hole is opened on the connecting rod.

[0008] In order to further improve the weeding effect, the upper part of the connecting rod 2 is hinged on the frame, the connecting rod 2 can swing backward, the lower part of the connecting rod 2 is connected to the middle rod 2, the rear end of the middle rod 2 is connected to the lower tension spring 2, the end of the lower tension spring 2 extending backward and downward is connected to the upper end of the grass pressing shovel, and the grass pressing shovel in front of the lower tension spring 2 is hinged to the lower part of the middle rod 2.

[0009] In order to further realize the resetting of the connecting rod 1 in the front-to-back direction, a plurality of upper tension springs corresponding to the connecting rods are connected to the frame, and one end of the upper tension spring extending backward is connected to the upper part of the connecting rod 1.

[0010] In order to further realize the forward and backward reciprocating motion of the weeding shovel, a transmission shaft is rotatably connected to the frame below the upper tension spring, and a plurality of eccentric wheels are connected to the transmission shaft. The upper part of the forward end of the connecting rod contacts the rearward outer edge of the eccentric wheel, and the frame is hinged to the connecting rod below the eccentric wheel.

[0011] In order to further realize the rotation of the transmission shaft, a transmission box is fixedly connected to the frame, and the transmission shaft is connected to the transmission box; wherein, the transmission box is connected to an input shaft, and the walking device in front of the frame drives the input shaft to rotate.

[0012] In order to further improve the reliability of the rotation of the transmission shaft, a plurality of mounting seats are connected to the frame, and the transmission shaft is rotatably connected to the mounting seats.

[0013] In order to further reduce the sliding resistance, the front end of the weeding shovel is tilted upward, and the rear end of the weeding shovel is tilted upward; in this design, the front part of the weeding shovel is tilted forward, and when weeding, the weeding shovel presses the grass into the lower side of the weeding shovel, thereby improving the weeding effect.

[0014] In order to further improve the weeding effect, the weeding shovel includes a horizontal part, the rear side of the horizontal part is connected to a connecting part that is tilted upward, the front side of the horizontal part is connected to a grass pressing part whose downward side is bent upward and protrudes outward, and the front side of the grass pressing part is connected to an inclined part that is inclined upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the present invention.

[0016] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0017] Figure 3 The three-dimensional structure of the present invention Figure 1 .

[0018] Figure 4 The three-dimensional structure of the present invention Figure 2 .

[0019] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0020] Figure 6 for Figure 4 A partial enlarged view of point C in the middle.

[0021] Figure 7 The three-dimensional structure of the present invention Figure 3 .

[0022] Among them, 1 furrow trimmer, 2 loosening plate one, 3 loosening plate two, 4 movable frame, 5 frame, 6 tooth groove two, 7 tooth groove one, 8 grass pressing component two, 801 grass pressing tooth two, 9 grass pressing component one, 901 grass pressing tooth one, 10 grass pressing shovel, 11 weeding component two, 1101 weeding tooth two, 12 weeding component one, 1201 weeding tooth one, 13 weeding shovel, 1301 horizontal part, 1302 connecting part, 1303 inclined part, 1304 grass pressing part, 14 middle rod one, 15 lower tension spring one, 16 middle rod two, 17 lower tension spring two, 18 adjustment hole two, 19 connecting hole two, 20 connecting rod two, 21 limit plate, 22 rear tension spring, 23 sliding groove, 24 connecting rod one, 25 eccentric wheel, 26 upper tension spring, 27 vertical rod, 28 connecting shaft, 29 connecting hole one, 30 adjustment hole one, 31 transmission box, 32 input shaft, 33 transmission shaft, 34 mounting seat, 35 reset tension spring, 36 hinged seat, 37 connecting ear two, 38 connecting ear one. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] like Figures 1 to 6The composite mechanical weeder shown in the figure comprises a frame 5, a plurality of vertical rods 27 are arranged at the front of the frame 5, a movable frame 4 is hinged at the lower part of the vertical rod 27, a connecting shaft 28 is rotatably connected to the lower part of the movable frame 4, a plurality of loosening plates 2 and loosening plates 3 are arranged at the periphery of the connecting shaft 28, a loosening plate 2 3 is provided on the connecting shaft 28 between two adjacent loosening plates 2, a plurality of tooth grooves 7 are arranged at the outward end of the loosening plate 2, a plurality of tooth grooves 6 are arranged at the outward end of the loosening plate 2, the tooth grooves 7 and the tooth grooves 6 are staggered in the left and right directions, and the movable frame 4 is arranged toward the outer side of the loosening plate 2. One end of the movable frame 4 is connected with a reset spring, and the upper end of the reset spring is connected to the frame 5. The rearward end of the upper part of the movable frame 4 can abut against the front side of the vertical rod 27. The frame 5 behind the vertical rod 27 is connected with a connecting rod 24 that can swing forward and backward in the left and right directions corresponding to the position of the vertical rod 27. The connecting rod 24 is provided with a sliding groove 23. A plurality of articulated seats 36 are arranged on the frame 5. The articulated seat 36 is connected to the connecting rod 24 via a pin shaft. The connecting rod 24 can rotate relative to the pin shaft in the front and rear directions. In the height direction, the connecting rod 24 moves up and down relative to the articulated seat 36 The connecting rod 124 is connected to a weeding shovel 13, the front end of the weeding shovel 13 is tilted upward, and the rear end of the weeding shovel 13 is tilted upward; the weeding shovel 13 includes a horizontal portion 1301, the rear side of the horizontal portion 1301 is connected to a connecting portion 1302 tilted upward, the front side of the horizontal portion 1301 is connected to a grass pressing portion 1304 with a downward side bent upward and protruding outward, and the front side of the grass pressing portion 1304 is connected to an inclined portion 1303 inclined upward, and at least one group of weeding components 12 is arranged on the lower side of the weeding shovel 13. In this embodiment, the weeding components 12 are arranged There are two groups, the weeding assembly 12 includes a plurality of weeding teeth 1201 arranged in the same row, the middle rod 14 is connected to the connecting rod 24, a plurality of adjustment holes 30 are arranged in the height direction of the middle rod 14, and a connecting hole 29 which can be coaxial with the adjustment hole 30 is opened on the connecting rod 24; the rearward end of the lower part of the connecting rod 24 is connected to a lower tension spring 15, and the rearward and downwardly inclined end of the lower tension spring 15 is connected to the upward end of the weeding shovel 13, and the weeding shovel 13 can rotate relative to the connecting rod 24, and the lower part of the middle rod 14 is hinged to the weeding shovel 13;A connecting rod 20 corresponding to the left-right position of the connecting rod 1 24 is connected to the frame 5 behind the connecting rod 1 24. The upper part of the connecting rod 20 is hinged on the frame 5, and the connecting rod 20 can swing backward. A limit plate 21 is provided on the front side of the upper part of the connecting rod 20, and the limit plate 21 contacts the downward side of the frame 5. A plurality of connecting ears 2 are arranged in the length direction of the frame 5. The connecting ears 2 are arranged on the frame 5 at the hinge of the frame 5 and the connecting rod 1 24. A rear tension spring 22 is connected to the connecting ear 2, and the end of the rear tension spring 22 extending backward is connected to the front side of the connecting rod 20. The lower part of the connecting rod 20 is detachably connected to the intermediate rod 2 16, and a plurality of adjustment holes 2 18 are arranged in the height direction of the intermediate rod 2 16. A connecting hole 2 19 is opened on the connecting rod 20, and the adjustment hole 2 18 can be connected with the connecting hole 1 9 coaxially, the lower part of the middle rod 2 16 is hinged with a grass pressing shovel 10, and at least one group of grass pressing components 1 9 and grass pressing components 2 8 are arranged on the lower side of the grass pressing shovel 10. In the front-to-back direction, the grass pressing components 1 9 and the grass pressing components 2 8 are arranged at intervals. In this embodiment, the grass pressing components 1 9 are provided with two groups, and the grass pressing components 2 8 are provided with one group. One group of grass pressing components 2 8 is arranged between the two groups of grass pressing components 1 9. The grass pressing components 1 9 include a plurality of grass pressing teeth 1 901 arranged in the same row, and the grass pressing components 2 8 include a plurality of grass pressing teeth 2 801 arranged in the same row. The grass pressing teeth 2 801 are staggered with the grass pressing teeth 1 901. The rearward end of the middle rod 2 16 is connected with a lower tension spring 2 17, and the end of the lower tension spring 2 17 extending backward and downward is connected to the upper end of the grass pressing shovel 10. The grass pressing shovel 10 in front of the lower tension spring 2 17 is hinged with the lower part of the middle rod 2 16. ;

[0025] In order to further avoid missing weeds, at least one group of weeding components 2 11 is arranged on the lower side of the weeding shovel 13. The weeding components 2 11 include a plurality of weeding teeth 2 1101 arranged in the same row. The weeding teeth 1 201 and the weeding teeth 2 1101 are staggered in the left and right directions. In this embodiment, one group of weeding components 2 11 is provided, and in the front and rear directions, the weeding components 2 11 is arranged between two groups of weeding components 1 12.

[0026] In order to further realize the reciprocating motion of the connecting rod 24 in the front and rear directions, a connecting ear 38 corresponding to the connecting rod 24 is connected to the frame 5 in front of the connecting rod 24, and an upper tension spring 26 is connected to the connecting ear 38. The end of the upper tension spring 26 extending backward is connected to the upper part of the connecting rod 24, and a transmission shaft 33 is rotatably connected to the frame 5 below the upper tension spring 26. A plurality of eccentric wheels 25 corresponding to the connecting rod 24 are connected to the transmission shaft 33. The upper part of the front end of the connecting rod 24 contacts the rear outer edge of the eccentric wheel 25, and the frame 5 is hinged to the connecting rod 24 below the eccentric wheel 25; the structure for realizing the rotation of the transmission shaft 33 is that a transmission box 31 is fixedly connected to the frame 5, and the transmission shaft 33 is connected to the transmission box 31; a plurality of mounting seats 34 are connected to the frame 5, and the transmission shaft 33 is rotatably connected to the mounting seats 34.

[0027] In the present invention, the front side of the frame 5 is connected to a walking device suitable for walking in a paddy field, and an input shaft 32 is connected to the transmission box 31, and the walking device in front of the frame 5 drives the input shaft 32 to rotate; the forward direction of the frame 5 is the front, and the direction opposite to the forward direction is the rear; a plurality of height-adjustable furrow trimmers 1 can also be detachably connected to the frame 5 in front of the vertical pole 27, and the number of furrow trimmers 1 is set according to actual needs. In this embodiment, two furrow trimmers 1 are provided; the speed at which the connecting rod 24 reciprocates back and forth is the speed at which the walking device travels, and in a natural state, the rearward end of the upper part of the movable frame 4 is attached to the forward side of the vertical pole 27, and the horizontal part 13 of the weeding shovel 13 01 is in a horizontal state, the connecting rod 20 is in a vertical state, and each tension spring is in a stretched state; the number of connecting rods 24 is set according to actual conditions, and the number of connecting rods 24 is the same as the number of connecting rods 20, and each weeding shovel 13 and grass pressing shovel 10 are in the row, and the weeding teeth 1201 and the weeding teeth 2 1101, the grass pressing teeth 1 901 and the grass pressing teeth 2 801 have the same or similar structures, and the angles of the weeding part 1 and the weeding part can be set according to actual needs. The weeding tooth 1201 includes a weeding part 1 fixed to the lower side of the weeding shovel 13 and tilted downward from front to back, and the rear side of the weeding part 1 is connected to a weeding part 2 extending backward and upward. The upper side of the second part is fixed to the lower side of the weeding shovel 13; the depths of the middle rod 14 and the middle rod 2 16 inserted into the connecting rod 1 24 and the connecting rod 20 are adjusted according to actual needs; the grass pressing shovel 10 provides support for the movable frame 4 and limits the depth of the loosening of the loosening plate 2; when working, the loosening plate 2 rotates forward with the walking device, and the loosening plate 2 and the loosening plate 2 3 first loosen the soil in the working field, and the tooth grooves 1 7 and the tooth grooves 2 6 are staggered to avoid missing loose soil. At the same time, the setting of the tooth grooves 1 7 or the tooth grooves 2 6 realizes block loosening and reduces the resistance to loosening. Then, the inclined part 1303 first presses the grass below it, and the grass pressing part 1304 further presses the grass into the weeding tooth 1 201, the transmission box 31 moves, the transmission shaft 33 rotates, the transmission shaft 33 drives the eccentric wheel 25 to rotate, the eccentric wheel 25 drives the connecting rod 1 24 to swing back and forth, the connecting rod 1 24 drives the weeding shovel 13 to swing back and forth, the weeding tooth 1 1201 and the weeding tooth 2 1101 continuously swing back and forth to remove the grass. The specific weeding process is that the weeding part 1 moves forward, the weeding part 1 presses the grass and loosens the grass, the weeding part 2 moves backward, the weeding part 2 presses the grass and further separates the grass from the soil, so as to achieve weeding, and the weeding effect is good. The weeding tooth 2 1101 weeds on the basis of the weeding tooth 1 1201 to avoid missing weeds and further improve the weeding effect.The grass pressing shovel 10 moves forward, and the grass is pressed to the lower side of the grass pressing shovel 10. The grass pressing teeth 901 further press the pulled grass into the soil, and the grass pressing teeth 801 press the grass that the grass pressing teeth 901 have not pressed into the soil, so as to avoid missing weeds and further improve the weeding effect. When encountering greater resistance such as climbing a slope, the loosening plates 1 2 and the loosening plates 2 3 sense the changes in terrain and drive the movable frame 4 to swing backward. The grass pressing shovel 10 also swings backward. The weeding shovel 13 senses the changes in terrain and pushes the middle rod to move upward. The connecting rod 1 24 moves upward through the sliding groove 23. When there is no resistance or the resistance is small, the movable frame 4 is reset under the action of the reset spring, and the connecting rod 20 is reset under the action of the rear tension spring 22. The positions of the loosening plates 1 2 and the grass pressing shovel 10 will change adaptively according to the changes in terrain, further improving the weeding effect. The weeding effect is improved, and the service life of each component is improved; when encountering an obstacle during weeding, the inclined part 1303 contacts the obstacle first, and the obstacle presses against the inclined part 1303, and the weeding shovel 13 rotates backward and upward, so that the weeding teeth leave the ground. When bypassing the obstacle, the weeding shovel 13 is reset under the action of the lower tension spring 15, avoiding the direct collision between the weeding shovel 13 and the obstacle, protecting the weeding teeth and improving their service life; the present invention has a simple structure, and the weeding shovel 13 can continuously reciprocate forward and backward movement by the joint setting of the eccentric wheel 25 and the upper tension spring 26. The structure is ingenious, and the combination of the weeding part 1 and the weeding part 2 and their reciprocating forward and backward movement continuously press the grass and separate the grass from the soil, and the weeding effect is good; it can be applied to the work of weeding between rows, especially suitable for weeding in paddy fields. ;

[0028] The present invention is not limited to the above-mentioned embodiments. The weeding component 12 and the grass pressing component 9 can also be provided with one group, three groups, four groups, etc. The number of the weeding component 12, the weeding component 2 11, the grass pressing component 1 9 and the grass pressing component 2 8 is set according to actual needs. On the basis of the technical scheme disclosed in the present invention, the technicians in this field can make some replacements and deformations of some of the technical features therein according to the disclosed technical content without creative labor, and these replacements and deformations are all within the protection scope of the present invention.

Claims

1. A composite mechanical weeder, comprising a frame, characterized in that: The yoke is provided with a plurality of vertical rods at the front portion of the frame, and a movable frame is hingedly provided at the lower portion of the movable frame, and a connecting shaft is rotatably connected to the lower portion of the movable frame, and a plurality of loosening plates are arranged on the outer periphery of the connecting shaft, and an upward end of the movable frame is connected to a reset spring, and the upper end of the reset spring is connected to the frame, and a connecting rod 1 that can swing back and forth in the left and right directions corresponding to the position of the vertical rods is connected to the frame behind the vertical rods, and a weeding shovel is connected to the connecting rod 1, and at least one weeding assembly 1 is arranged on the lower side of the weeding shovel, and the weeding assembly 1 includes a plurality of weeding teeth arranged in the same row, and a connecting rod 2 corresponding to the position of the connecting rod 1 in the left and right directions is connected to the frame behind the connecting rod 1, and a grass pressing shovel is connected below the connecting rod 2, and at least one group of grass pressing assemblies 1 is arranged on the lower side of the grass pressing shovel, and the grass pressing assemblies 1 include a plurality of grass pressing teeth arranged in the same row, and at least one group of weeding assemblies 2 are also arranged on the lower side of the weeding shovel, and the weeding assembly 2 includes a plurality of weeding teeth arranged in the same row The weeding teeth are arranged staggered in the left and right directions. The connecting rod is connected with an intermediate rod, and a plurality of adjustment holes are arranged in the height direction of the intermediate rod. The connecting rod is provided with a connecting hole which can be coaxial with the adjustment hole. The upper part of the connecting rod is hinged on the frame, and the connecting rod can swing backward. The lower part of the connecting rod is connected with the intermediate rod, and the rear end of the intermediate rod is connected with the lower tension spring, and the lower tension spring extends backward and downward. One end is connected to the upper end of the grass pressing shovel, the grass pressing shovel in front of the lower tension spring second is hinged to the lower part of the middle rod second, the frame is connected to a plurality of upper tension springs corresponding to the connecting rods one by one, the rearwardly extending end of the upper tension spring is connected to the upper part of the connecting rod one, the frame below the upper tension spring is rotatably connected to a transmission shaft, the transmission shaft is connected to a plurality of eccentric wheels, the upper part of the forward end of the connecting rod one contacts the rearward outer edge of the eccentric wheel, and the frame is hinged to the connecting rod one below the eccentric wheel.

2. A compound mechanical weeder according to claim 1, characterized in that: A transmission box is fixedly connected to the frame, and the transmission shaft is connected to the transmission box.

3. A compound mechanical weeder according to claim 1, characterized in that: The frame is connected with a plurality of mounting seats, and the transmission shaft is rotatably connected to the mounting seats.

4. A combined mechanical weeder according to any one of claims 1 to 3, characterized in that: The front end of the weeding shovel is tilted upward, and the rear end of the weeding shovel is tilted upward.

5. A combined mechanical weeder according to claim 4, characterized in that: The weeding shovel comprises a horizontal part, the rear side of which is connected to a connection part that tilts upward, the front side of which is connected to a grass pressing part that bends upward and protrudes outward, and the front side of which is connected to an inclined part that tilts upward.

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