Rotary excavating mechanism with self-centering stability

Abstract

The utility model relates to agricultural equipment field especially has the rotary digging mechanism with self-centering stability, including frame and cross shaft, the lateral wall of cross shaft rotation is connected in the frame, the outer surface of frame is equipped with the installation roller axle, the outer surface of installation roller axle is equipped with a plurality of sleeves, the lateral wall of sleeve is all solid with a plurality of chisel shape knives, the lateral wall of chisel shape knife is all solid with two mounting seats, and the end of mounting seat all swing -connected support plate, and the middle of mounting seat all set up has installed the groove, compared with traditional rotary digging mechanism, through cross shaft, sleeve, chisel shape knife, mounting seat, support plate and bending knife cooperation improved the quality that soil and weed cut up mixed, through mounting seat, support plate, spring and cooperation, when the force that spring and damper received exceeds critical value, can telescopic automatic back swing unloading force, thereby avoid bending knife fracture, thereby improve the security and service life that rotary digging mechanism uses.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery and equipment, and in particular to a rotary drilling mechanism with self-centering stability. Background Technology

[0002] A rotary tiller for weeding and fertilizing is an agricultural machine that combines multiple functions such as weeding, fertilizing, and rotary tilling. Rotary tillers for weeding and fertilizing typically require a rotary digging mechanism, which is achieved by weeding blades mounted on the tiller's cutter shaft. When the rotary tiller is working, the cutter shaft drives the weeding blades to rotate at high speed, and the blades cut or chop the weeds by the roots, mixing them with the soil to achieve the purpose of weeding. At the same time, rotary tilling improves the uniformity of fertilizer application.

[0003] The existing rotary drilling mechanism is a key part of helping agricultural machinery operate efficiently. It mainly consists of a power transmission system, rotary drilling cutters, adjustment devices, and auxiliary components. The power transmission system is generally powered by an engine or electric motor and driven by belts, chains, or gears. The rotary drilling cutters are the core working components. Common cutter types include chisel cutters and curved cutters. Chisel cutters are suitable for hard soil and farmland with a lot of weeds. They can powerfully break up soil clods and cut roots and stems. Curved cutters focus on chopping and loosening the soil to enhance soil aeration and fertilizer mixing.

[0004] When existing rotary drilling rigs are used in complex terrains such as hills and gravel areas, the presence of stones in the soil can cause the cutting blades to deform or even break when they come into contact with the stones, thus affecting the safety and service life of the rotary drilling rig. Utility Model Content

[0005] To overcome the problem that existing rotary drilling rigs may deform or even break when the cutting blade comes into contact with rocks in complex terrains such as hills and gravel, thus affecting the safety and service life of the rotary drilling rig.

[0006] The technical solution of this utility model is as follows: a self-centering and stable rotary drilling mechanism, including a frame and a horizontal shaft, the horizontal shaft being rotatably connected to the side wall of the frame, an installation roller shaft being fitted on the outer surface of the frame, a plurality of sleeves being fitted on the outer surface of the installation roller shaft, a plurality of chisel-shaped cutters being fixed on the side wall of each sleeve, two mounting seats being fixed on the side wall of each chisel-shaped cutter, a support plate being movably connected to the end of each mounting seat, an installation groove being opened in the middle of each mounting seat, a plurality of curved cutters being fixed at the bottom end of each support plate, two springs being fixed at the top end of each support plate, and a damper being installed in the middle of each spring.

[0007] Furthermore, the two springs are symmetrically distributed, with one end of the damper fixed to the surface of the support plate and the other end fixed to the top of the mounting groove, which improves the stability of the support plate's movement.

[0008] Furthermore, a sliding groove is provided on the side wall of the horizontal shaft, and a first limiting block is fixed on the inner side wall of the sleeve. The first limiting block is slidably connected to the outer surface of the horizontal shaft, which improves the convenience of sleeve installation and positioning.

[0009] Furthermore, several first threaded grooves are linearly formed on the side wall of the horizontal shaft near the slide groove, and third threaded grooves are formed on the side wall of the sleeve.

[0010] Furthermore, the first and third threaded grooves have the same internal dimensions, and the first limit bolts are sequentially threaded into the middle of the first and third threaded grooves, which improves the stability of the sleeve installation.

[0011] Furthermore, limiting wheels are fitted at both ends of the horizontal shaft near the mounting roller shaft, and second limiting blocks are fixed at both ends of the mounting roller shaft, which improves the stability of the rotary drilling.

[0012] Furthermore, the horizontal shaft, the mounting roller shaft, and the second limiting block are fixedly connected to form an integrated structure. The second limiting block has a second threaded groove on its side wall for bolt connection, which improves the stability of the limiting wheel installation.

[0013] Furthermore, a power assembly is provided at the end of the horizontal shaft. The power assembly includes a first sprocket fixed at the end of the horizontal shaft and a motor fixed on the inner side wall of the frame. A second sprocket is fixed at the output end of the motor, and a chain meshes with the outer surfaces of the motor and the second sprocket.

[0014] The beneficial effects of this utility model are:

[0015] Compared to traditional rotary drilling mechanisms, the combination of the horizontal shaft, sleeve, chisel cutter, mounting base, support plate, and curved blade improves the quality of soil and weed chopping and mixing. The combination of the mounting base, support plate, and spring allows the spring and damper to automatically retract and unload the force when the force exceeds a critical value, thereby preventing the curved blade from breaking and improving the safety and service life of the rotary drilling mechanism. Secondly, the combination of the horizontal shaft, sleeve, first limit bolt, first limit block, slide groove, first threaded groove, and third threaded groove improves the convenience of sleeve installation, positioning, and disassembly. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic representation of the overall installation structure of the rotary drilling mechanism of this utility model.

[0017] Figure 2 The diagram shown is a side view of the overall structure of this utility model.

[0018] Figure 3 The diagram shown is a schematic representation of the sleeve structure of this utility model.

[0019] Figure 4The diagram shown is a schematic representation of the installation roller structure of this utility model.

[0020] Figure 5 The diagram shown is a schematic representation of the mounting base structure of this utility model.

[0021] Figure 6 The diagram shown is a schematic representation of the curved blade structure of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Horizontal shaft; 3. Mounting roller shaft; 4. Sleeve; 5. Chisel cutter; 6. Mounting base; 7. Support plate; 8. Curved knife; 9. Limiting wheel; 10. Power assembly; 1001. First sprocket; 1002. Motor; 1003. Second sprocket; 1004. Chain; 11. First limiting bolt; 12. Spring; 13. Damper; 14. First limiting block; 15. Slide groove; 16. First threaded groove; 17. Second limiting block; 18. Second threaded groove; 19. Mounting groove; 20. Third threaded groove. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Among the currently discovered feasible technologies, the following are described:

[0025] Please refer to Figures 1-6 The rotary excavator has a self-centering and stable mechanism, including a frame 1 and a horizontal shaft 2. The frame 1 is used for support and limiting. A fertilizer spreading device is integrated at the top of the frame 1 for fertilization. The frame 1 and the fertilizer spreading device frame 1 are existing technologies and will not be described in detail here. The horizontal shaft 2 is rotatably connected to the side wall of the frame 1 via bearings. An installation roller 3 is fitted on the outer surface of the frame 1. Several sleeves 4 are fitted on the outer surface of the installation roller 3. The sleeves 4 are all annular and used for support and limiting. Several chisel-shaped blades 5 are fixed on the side wall of each sleeve 4. The chisel-shaped blades 5 cut large pieces of soil. Two mounting seats 6 are fixed on the side wall of each chisel-shaped blade 5 by welding. The mounting seats 6 are symmetrically distributed to support and limit. A support plate 7 is movably connected to the end of each mounting seat 6. A section is opened in the middle of each mounting seat 6. The support plate 7 has a mounting groove 19. Several curved blades 8 are welded to the bottom of the support plate 7. The curved blades 8 are used to further chop the soil and weeds, so that the weeds are mixed with the soil to achieve the purpose of weeding and turning the soil. Two springs 12 are fixed to the top of the support plate 7. A damper 13 is installed in the middle of each spring 12. The two springs 12 are symmetrically distributed. One end of the damper 13 is fixed to the surface of the support plate 7, and the other end of the damper 13 is fixed to the top of the mounting groove 19, which improves the stability of the movement of the support plate 7. When the curved blades 8 come into contact with stones, when the force on the springs 12 and the dampers 13 exceeds the critical value, the springs 12 and the dampers 13 automatically unload the force by extending and retracting, thereby preventing the curved blades 8 from breaking, thus improving the safety and service life of the rotary drilling mechanism.

[0026] A sliding groove 15 is provided on the side wall of the horizontal shaft 2, and a first limiting block 14 is fixedly provided on the inner side wall of the sleeve 4. The first limiting block 14 is slidably connected to the outer surface of the horizontal shaft 2. The internal dimensions of the sleeve 4 are adapted to the external dimensions of the horizontal shaft 2, which improves the convenience of the sleeve 4 installation and positioning. The sleeve 4, the chisel 5, the mounting base 6 and the first limiting block 14 are all made of steel and are fixedly connected to form an integral structure. Several first threaded grooves 16 are linearly provided on the side wall of the horizontal shaft 2 near the sliding groove 15. A third threaded groove 20 is provided on the side wall of the sleeve 4. The internal dimensions of the first threaded groove 16 and the third threaded groove 20 are the same. A first limiting bolt 11 is threadedly connected in sequence between the first threaded groove 16 and the third threaded groove 20, which improves the stability of the sleeve 4 installation.

[0027] Limiting wheels 9 are fitted at both ends of the horizontal shaft 2 near the mounting roller shaft 3. The limiting wheels 9 are used to support and limit the movement to prevent deviation during rotary tillage, thereby improving the stability of the rotary digging mechanism. Second limiting blocks 17 are fixed at both ends of the mounting roller shaft 3 to improve the stability of rotary digging. The horizontal shaft 2, the mounting roller shaft 3, and the second limiting blocks 17 are fixedly connected to form an integral structure. The side wall of the second limiting block 17 is provided with a second threaded groove 18 for bolt connection, which improves the stability of the installation of the limiting wheels 9.

[0028] A power assembly 10 is provided at the end of the horizontal shaft 2. The power assembly 10 includes a first sprocket 1001 fixed at the end of the horizontal shaft 2, and a motor 1002 fixed on the inner side wall of the frame 1. A second sprocket 1003 is fixed at the output end of the motor 1002. A chain 1004 meshes with the outer surfaces of the motor 1002 and the second sprocket 1003. Starting the motor 1002 can drive the second sprocket 1003 to rotate. The chain 1004 pulls the first sprocket 1001 and the horizontal shaft 2 to rotate, thereby realizing the digging drive.

[0029] When using this rotary tiller, the operator first installs the device on the side wall of the weeding and fertilizing rotary tiller frame 1. The weeding and fertilizing rotary tiller is an agricultural machinery device that integrates weeding, fertilizing, and rotary tilling functions. It is powered by a diesel engine. The weeding and fertilizing rotary tiller is existing technology and will not be described in detail here. When it is necessary to turn the soil and weed, the operator starts the motor 1002, which drives the second sprocket 1003, chain 1004 and the first sprocket 1001 to rotate the horizontal shaft 2, thereby driving the chisel blade 5 and the curved blade 8 to rotate at high speed. The chisel blade 5 is used to turn over and cut large particles of soil. The turned soil and weeds are then further chopped and mixed by the curved blade 8, thereby realizing the turning over and weeding. When encountering gravel particles during the weeding process, when the curved blade 8 comes into contact with the stone, the force on the spring 12 and damper 13 exceeds the critical value. The spring 12 and damper 13 automatically release the force by extending and retracting, thereby preventing the curved blade 8 from breaking, thus improving the safety and service life of the rotary tiller.

[0030] Furthermore, considering that the curved blade 8 and the chisel blade 5 need to be disassembled and polished due to surface wear after long-term use, the convenience of installing, positioning and disassembling the sleeve 4 is improved by cooperating with the horizontal shaft 2, sleeve 4, first limit bolt 11, first limit block 14, slide groove 15, first threaded groove 16 and third threaded groove 20.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotary drilling mechanism with self-centering stability, characterized in that, The machine includes a frame (1) and a horizontal shaft (2): the horizontal shaft (2) is rotatably connected to the side wall of the frame (1). The outer surface of the frame (1) is fitted with an installation roller (3). The outer surface of the installation roller (3) is fitted with several sleeves (4). Several chisel-shaped blades (5) are fixed on the side wall of each sleeve (4). Two mounting seats (6) are fixed on the side wall of each chisel-shaped blade (5). Support plates (7) are movably connected to the ends of the mounting seats (6). Mounting grooves (19) are opened in the middle of each mounting seat (6). Several curved blades (8) are fixed at the bottom of each support plate (7). Two springs (12) are fixed at the top of each support plate (7). A damper (13) is installed in the middle of each spring (12).

2. The rotary drilling mechanism with self-centering stability according to claim 1, characterized in that: The two springs (12) are symmetrically distributed. One end of the damper (13) is fixed on the surface of the support plate (7), and the other end of the damper (13) is fixed at the top of the mounting groove (19).

3. The rotary drilling mechanism with self-centering stability according to claim 1, characterized in that: A groove (15) is provided on the side wall of the horizontal shaft (2), and a first limiting block (14) is fixed on the inner side wall of the sleeve (4). The first limiting block (14) is slidably connected to the outer surface of the horizontal shaft (2).

4. The rotary drilling mechanism with self-centering stability according to claim 1, characterized in that: The horizontal shaft (2) has several first threaded grooves (16) linearly opened on the side wall near the slide groove (15), and the sleeve (4) has third threaded grooves (20) opened on the side wall.

5. The rotary drilling mechanism with self-centering stability according to claim 4, characterized in that: The first threaded groove (16) and the third threaded groove (20) have the same internal dimensions, and the first limit bolt (11) is threadedly connected between the first threaded groove (16) and the third threaded groove (20).

6. The rotary drilling mechanism with self-centering stability according to claim 4, characterized in that: Limiting wheels (9) are fitted on both ends of the horizontal shaft (2) near the mounting roller shaft (3), and second limiting blocks (17) are fixed on both ends of the mounting roller shaft (3).

7. The rotary drilling mechanism with self-centering stability according to claim 6, characterized in that: The horizontal shaft (2), the mounting roller shaft (3), and the second limiting block (17) are fixedly connected to form an integral structure. The second limiting block (17) has a second threaded groove (18) on its side wall for bolt connection.

8. The rotary drilling mechanism with self-centering stability according to claim 1, characterized in that: A power assembly (10) is provided at the end of the horizontal shaft (2). The power assembly (10) includes a first sprocket (1001) fixed at the end of the horizontal shaft (2) and a motor (1002) fixed on the inner side wall of the frame (1). A second sprocket (1003) is fixed at the output end of the motor (1002). A chain (1004) meshes with the outer surfaces of the motor (1002) and the second sprocket (1003).

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