Anti-loosening fixing structure for rotating knife shaft of agricultural machinery

Abstract

The present invention discloses an anti-loosening fixing structure for a rotary blade shaft of agricultural machinery, and relates to the technical field of accessories of rotary tillers. The present invention comprises a rotary tiller shaft, and a plurality of mounting blade seats are fixedly mounted on the side wall of the rotary tiller shaft, and soil cutting blades are inserted on the mounting blade seats, and locking sleeves are sleeved on the mounting blade seats, and mounting through holes are provided on both sides of the mounting blade seat, one side of the locking sleeve, and the side wall of the tail end of the soil cutting blade, and a hexagonal bolt is provided on one side of the locking sleeve. The present invention arranges an anti-loosening component, so that after the hexagonal bolt and the hexagonal nut are tightened, the control knob is controlled to rotate, and the anti-loosening block and the hexagonal nut are inserted and tightly attached to each other, and the anti-loosening block and the hexagonal positioning groove respectively lock the hexagonal nut and the hexagonal bolt, thereby avoiding the occurrence of loosening of the hexagonal bolt and the hexagonal nut, ensuring that the connection between the soil cutting blade and the mounting blade seat is always tight, and effectively improving the stability of the operation of the rotary tiller.

Description

Technical Field

[0001] The invention relates to the technical field of rotary tiller accessories, and in particular to an anti-loosening fixing structure for a rotary cutter shaft of an agricultural machinery. Background Art

[0002] A rotary tiller is a tilling machine that is used in conjunction with a tractor to complete plowing and harrowing operations. It is divided into three types according to the configuration of the rotary tiller blade shaft: horizontal axis type, vertical axis type and inclined axis type. Among them, the horizontal axis rotary tiller with the blade shaft horizontally arranged is more commonly used. The horizontal axis working parts include a rotary tiller blade shaft and several soil cutting blades evenly arranged according to a multi-start spiral. The soil cutting blades can be divided into chisel-shaped blades, curved blades, right-angle blades and arc-shaped blades. The blades can be installed by staggered installation, internal installation and external installation.

[0003] At present, the soil cutting blade is generally installed on the rotating cutter shaft through the cutter seat and the hexagonal bolt passing through the cutter seat. During the operation of the rotary tiller, the soil cutting blade needs to cut the soil layer from front to back and throw the soil blocks backward and upward onto the cover and the drag plate for further crushing. Therefore, the rotating cutter shaft and the blade itself need to bear a large load and be subjected to frequent impact and vibration, so that the hexagonal bolt and the nut rotate relative to each other. At the same time, due to the long-term collision with hard objects such as granular soil blocks and gravel, the tail end of the blade and the bolt and nut are worn, and then the threaded connection is loosened, resulting in the connection between the blade and the cutter seat is no longer tight, resulting in unstable working condition of the rotary tiller. For this reason, an anti-loosening fixing structure of a rotary cutter shaft of agricultural machinery is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the rotating cutter shaft and blade of the current rotary tiller need to bear a large load and are frequently impacted and vibrated when working, thereby causing the hexagonal bolt and the nut to rotate relative to each other, and at the same time, due to the long-term collision with hard objects such as granular soil blocks and gravel, the tail end of the blade and the bolt and nut are worn, and then the threaded connection is loosened, resulting in the connection between the blade and the knife seat is no longer tight, resulting in unstable working conditions of the rotary tiller. The present invention provides an anti-loosening fixing structure for the rotating cutter shaft of agricultural machinery.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A loosening prevention and fixing structure for a rotary blade shaft of an agricultural machinery comprises a rotary blade shaft, a plurality of mounting blade seats are fixedly mounted on the side wall of the rotary blade shaft, soil cutting blades are inserted on the mounting blade seats, and locking sleeves are sleeved on the mounting blade seats, mounting through holes are provided on both sides of the mounting blade seat, one side of the locking sleeve and the side wall of the tail end of the soil cutting blade, a hexagonal bolt is provided on one side of the locking sleeve, the screw tail end of the hexagonal bolt sequentially passes through four mounting through holes and is screwed with a hexagonal nut, a hexagonal positioning groove is provided on the side of the locking sleeve away from the hexagonal nut, the hexagonal positioning groove is matched with the head of the hexagonal bolt, a plurality of operating grooves are provided inside the rotary blade shaft, both ends of the operating grooves are connected to the outside, the positions of the plurality of operating grooves respectively correspond to the positions of the plurality of hexagonal nuts, and anti-loosening components are provided inside the operating grooves;

[0007] The anti-loosening assembly is used to lock the hexagonal nut after the hexagonal bolt is screwed to the hexagonal nut, so that the hexagonal nut cannot rotate on its own;

[0008] The anti-loosening assembly includes a control knob, a telescopic screw barrel and two relay shafts rotatably mounted on the inner wall of the bottom of the operating groove. The bottom ends of the control knob and the telescopic screw barrel are fixedly sleeved with linkage gears. The two relay shafts are located between the control knob and the telescopic screw barrel. The top ends of the two relay shafts are fixedly sleeved with relay gears. The two relay gears are meshed with each other and respectively meshed with the two linkage gears. A telescopic screw is threaded inside the top end of the telescopic screw barrel. An anti-loosening block is provided at the top end of the telescopic screw. The anti-loosening block is slidably mounted inside the top end of the operating groove. The anti-loosening block is located at the bottom of the hexagonal nut and is adapted to the hexagonal nut.

[0009] Furthermore, a dustproof outer slide cylinder is fixedly installed on the top of the telescopic screw rod, the opening of the dustproof outer slide cylinder faces the telescopic screw barrel, the dustproof outer slide cylinder is slidably sleeved on the telescopic screw barrel, an elastic part is fixedly installed on the top of the dustproof outer slide cylinder, and the anti-loosening block is fixedly installed on the top of the elastic part.

[0010] Furthermore, the anti-loosening block, the elastic part and the dustproof outer slide are provided with a common lubrication channel, the lubrication channel is connected with the interior of the dustproof outer slide, the anti-loosening block is provided with a placement groove on the side facing the hexagonal nut, the placement groove is connected with the lubrication channel, a through-hole pressure plate is placed inside the placement groove, and a blocking rod adapted to the lubrication channel is fixedly installed at the bottom of the through-hole pressure plate.

[0011] Furthermore, a plurality of cover plate grooves are provided on the circumferential side of the rotary tiller shaft, and the plurality of cover plate grooves respectively correspond to the positions of the plurality of operating grooves, and dustproof covers are rotatably installed inside the cover plate grooves, and elastic latches are slidably installed on the tops of the dustproof covers, and a card slot is provided on the bottom inner wall of the operating groove, and the bottom end of the elastic latch extends to the interior of the operating groove and is adapted to the card slot.

[0012] Furthermore, a lubrication drain hole is provided on the inner wall of the cover plate groove, and the position of the lubrication drain hole corresponds to the position of the relay gear.

[0013] Furthermore, an outer shell is provided inside the locking sleeve, one end of the outer shell passes through the four mounting through holes in sequence, the mounting through holes are located between the head of the hexagonal bolt and the hexagonal nut, a rubber inner shell is fixedly installed inside the outer shell, and the screw of the hexagonal bolt is located inside the rubber inner shell.

[0014] Furthermore, a hexagonal rubber pad is sleeved on the head of the hexagonal bolt, and the hexagonal rubber pad is located inside the hexagonal positioning groove.

[0015] Furthermore, an anti-drop slide plate is slidably mounted on a side of the locking sleeve away from the hexagonal nut, and the position of the anti-drop slide plate corresponds to the position of the hexagonal bolt.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The present invention provides an anti-loosening assembly, so that after the hexagonal bolt and the hexagonal nut are tightened, the control knob is controlled to rotate, driving the anti-loosening block and the hexagonal nut to be plugged and tightly connected with each other, and the anti-loosening block and the hexagonal positioning groove respectively lock the hexagonal nut and the hexagonal bolt, thereby preventing the hexagonal bolt and the hexagonal nut from loosening, ensuring that the connection between the soil cutting blade and the mounting blade seat is always tight, and effectively improving the stability of the rotary tiller operation;

[0018] 2. The present invention provides a dustproof outer slide barrel, so that as the telescopic screw and the telescopic barrel are relatively spirally extended and retracted, the dustproof outer slide barrel will also perform relative spiral sliding on the telescopic barrel, so that the telescopic screw is always located inside the dustproof outer slide barrel, so that the dustproof outer slide barrel hangs the telescopic screw to play a protective role, realizes the function of moisture-proof and dust-proof, and prevents the threaded engagement of the telescopic screw and the telescopic barrel from being affected by rust and dust and failing to transmit normally;

[0019] 3. The present invention provides an elastic member so that the telescopic screw rod will synchronously drive the elastic member to compress, thereby improving the tightness of the connection between the anti-loosening block and the hexagonal nut. At the same time, when the rotary tiller shaft is in operation, the anti-loosening block will have a tendency to move outward under the action of centrifugal force. The elastic member provides a margin for elastic sliding of the anti-loosening block, so that the anti-loosening block can further press the hexagonal nut during the rotary tillage process, thereby improving the stability of the connection between the soil cutting blade and the mounting seat.

[0020] 4. The present invention provides a lubrication channel, so that the control knob is used to drive the anti-loosening block to disengage from the hexagonal nut, and then the through-hole pressure plate is pinched to pull the blocking rod out from the top of the lubrication channel, and then the lubricating oil is dripped into the lubrication channel, and the control knob is used to drive the anti-loosening block to move up and down, so that the lubricating oil can lubricate the meshing part of the telescopic screw and the telescopic barrel by itself, thereby realizing the maintenance of the telescopic barrel and the telescopic screw;

[0021] 5. The present invention provides a dust cover so that the dust cover can cooperate with the cover groove to close one end of the operating groove, and slide the elastic latch to engage with the slot to lock the dust cover in the cover groove, while the other end of the operating groove is closed by the anti-loosening block, so that after the soil cutting blade is installed, the inside of the operating groove is sealed, which plays a role in moisture and dust prevention and prolongs the service life of the fixed structure;

[0022] 6. The present invention provides lubrication discharge holes so that the sliding elastic latch unlocks the dust cover plate, and then the dust cover plate is opened, and lubrication oil is dripped into the inside of the operating groove through the lubrication discharge holes on the cover plate groove, so that the lubrication oil drips on the two relay gears, and then the control knob is rotated to make each linkage gear and the relay gear mesh with each other, so that the lubrication oil can cover each gear, thereby realizing the lubrication maintenance of the linkage gear and the relay gear;

[0023] 7. The present invention provides an outer shell, so that after the soil cutting blade is inserted into the mounting blade seat, the outer shell is first inserted into each mounting through hole in sequence, and then the hexagonal bolt is inserted into the rubber inner shell. The outer shell and the rubber inner shell can separate the screw rod of the hexagonal bolt from the mounting blade seat, the locking sleeve, and the soil cutting blade, thereby effectively preventing the thread of the hexagonal bolt from being worn and extending the matching service life of the hexagonal bolt and the hexagonal nut;

[0024] 8. The present invention provides a hexagonal rubber pad so that before installing the hexagonal bolt, the sleeve is first connected to the head of the hexagonal bolt, and then the hexagonal bolt is installed on the mounting knife seat and the locking sleeve, so that the head of the hexagonal bolt and the hexagonal rubber pad are inserted into the hexagonal positioning groove at the same time, so that the hexagonal rubber pad separates the head of the hexagonal bolt from the locking sleeve, effectively preventing the head of the hexagonal bolt from being worn;

[0025] 9. The present invention provides an anti-drop slide plate so that after the hexagonal bolt is inserted, the head of the hexagonal bolt is located inside the hexagonal positioning groove. The anti-drop slide plate is then slid so that the anti-drop slide plate is located on one side of the hexagonal bolt head to prevent the hexagonal bolt from falling out of the hexagonal positioning groove during the process of screwing and installing the hexagonal nut. The hexagonal bolt is always located inside the hexagonal positioning groove and is positioned, which facilitates the assembly of the hexagonal bolt and the hexagonal nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of a single set of soil cutting blades of the present invention from a first-view perspective;

[0028] Figure 3 The present invention Figure 2 Schematic diagram of the structure at A in the middle;

[0029] Figure 4 It is a schematic diagram of the third-dimensional structure of a single set of soil cutting blades of the present invention in cooperation with the second viewing angle;

[0030] Figure 5 The present invention Figure 4 Schematic diagram of the structure at B in the middle;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the installation of the knife seat and the locking sleeve in the first perspective of the present invention;

[0032] Figure 7 It is a schematic diagram of the third perspective structure of the knife seat and the locking sleeve of the present invention;

[0033] Figure 8 It is a schematic diagram of the internal three-dimensional structure of the operating tank of the present invention;

[0034] Fig. 9 It is a schematic diagram of the three-dimensional structure of the telescopic screw barrel and the anti-loosening block of the present invention;

[0035] Fig.10 It is a schematic diagram of the internal three-dimensional structure of the dustproof outer sliding cylinder, the elastic member and the through-hole pressing plate of the present invention;

[0036] Attached Figures: 1. rotary tiller shaft; 101. operating slot; 102. cover plate slot; 103. card slot; 104. lubrication row hole; 2. installation knife seat; 3. soil cutting blade; 4. locking sleeve; 401. installation through hole; 402. hexagonal positioning slot; 5. hexagonal bolt; 6. hexagonal nut; 7. control knob; 8. telescopic screw barrel; 9. linkage gear; 10. relay shaft; 11. relay gear; 12. telescopic screw; 13. anti-loosening block; 1301. lubrication channel; 14. dustproof outer slide cylinder; 15. elastic part; 16. through-hole pressure plate; 17. blocking rod; 18. dustproof cover plate; 19. elastic latch; 20. outer shell; 21. rubber inner shell; 22. hexagonal rubber pad; 23. anti-drop slide plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0040] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] like Figures 1 to 10 As shown, a structure for preventing loosening and fixing a rotary blade shaft of an agricultural machine includes a rotary blade shaft 1, as shown in FIG. Figure 2As shown, a plurality of mounting blade seats 2 are fixedly mounted on the side wall of the rotary tiller shaft 1, and soil cutting blades 3 are plugged into the mounting blade seats 2. In this embodiment, the plurality of mounting blade seats 2 and the plurality of soil cutting blades 3 are divided into a plurality of groups on the rotary tiller shaft 1, and each group of soil cutting blades 3 is spirally distributed around the rotary tiller shaft 1. Figure 1 For example, three installation knife seats 2 and three soil cutting blades 3 form a group, and multiple groups of soil cutting blades 3 are evenly distributed along the axis direction of the rotary tillage blade shaft 1. The angle of each group of soil cutting blades 3 changes evenly. The installation knife seats 2 are all sleeved with locking sleeves 4, such as Figure 6 As shown, mounting holes 401 are provided on both sides of the mounting seat 2, one side of the locking sleeve 4 and the side wall of the rear end of the soil cutting blade 3. Figure 5 As shown, a hexagonal bolt 5 is provided on one side of the locking sleeve 4. Figure 2 As shown, the tail end of the hexagonal bolt 5 passes through four mounting through holes 401 in sequence and is screwed with a hexagonal nut 6, as shown in FIG. Figure 7 As shown, a hexagonal positioning groove 402 is formed on the side of the locking sleeve 4 facing away from the hexagonal nut 6, and the hexagonal positioning groove 402 is matched with the head of the hexagonal bolt 5. Figure 8 As shown, a plurality of operating grooves 101 are provided inside the rotary tiller shaft 1, both ends of the operating grooves 101 are connected to the outside, the positions of the plurality of operating grooves 101 correspond to the positions of the plurality of hexagonal nuts 6, and anti-loosening components are provided inside the operating grooves 101; specifically, when installing the blade, the anti-loosening fixing structure of the rotary tiller shaft 1 of the agricultural machinery first sleeves the locking sleeve 4 on the mounting blade seat 2 from one end of the rotary tiller shaft 1, and then inserts the soil cutting blade 3 on the mounting blade seat 2, and then inserts the hexagonal bolt 5 into the mounting through hole 401 on the locking sleeve 4, the mounting blade seat 2, and the soil cutting blade 3, so that the hexagonal head of the hexagonal bolt 5 is stuck in the hexagonal positioning groove 402 on one side of the locking sleeve 4, and the hexagonal nut 6 is screwed on the tail end of the screw of the hexagonal bolt 5 until it is tightened, so as to fix the soil cutting blade 3;

[0042] The anti-loosening component is used to lock the hexagonal nut 6 after the hexagonal bolt 5 is screwed with the hexagonal nut 6, so that the hexagonal nut 6 cannot rotate by itself;

[0043] like Figure 8 As shown, the anti-loosening assembly includes a control knob 7, a telescopic screw barrel 8 and two relay shafts 10 rotatably mounted on the inner wall of the bottom of the operating groove 101. In this embodiment, a hexagonal slot 103 is provided on the top of the control knob 7, which can be compatible with a common model of hexagonal wrench on the market. The bottom ends of the control knob 7 and the telescopic screw barrel 8 are fixedly sleeved with a linkage gear 9. The two relay shafts 10 are located between the control knob 7 and the telescopic screw barrel 8. The top ends of the two relay shafts 10 are fixedly sleeved with relay gears 11. The two relay gears 11 mesh with each other and mesh with the two linkage gears 9 respectively. Fig.10As shown, a telescopic screw 12 is screwed inside the top of the telescopic screw barrel 8, and an anti-loosening block 13 is arranged on the top of the telescopic screw barrel 8. The anti-loosening block 13 is slidably installed inside the top of the operating groove 101, and the anti-loosening block 13 is located at the bottom of the hexagonal nut 6 and is adapted to the hexagonal nut 6; specifically, by arranging an anti-loosening component, after the hexagonal bolt 5 and the hexagonal nut 6 are tightened, the hexagonal positioning groove 402 will play a positioning role for the hexagonal bolt 5, so that the position of the hexagonal bolt 5 after tightening each time is roughly the same, and after the hexagonal nut 6 is screwed several turns along the thread line on the hexagonal bolt 5 and tightened, the side of the hexagonal nut 6 facing the anti-loosening block 13 will correspond to the position of the anti-loosening block 13, and then the control knob 7 is driven to rotate manually or with a hexagonal wrench, and then through the meshing linkage gear 9 and the relay gear 11 drive the telescopic screw barrel 8 to rotate, and then under the limiting action of the anti-loosening block 13 and the operating groove 101 slidingly connected with each other, the telescopic screw 12 extends to the outside of the operating groove 101, thereby driving the anti-loosening block 13 to slide out of the operating groove 101 until it is tightly plugged with the hexagonal nut 6, so that the anti-loosening block 13 limits the hexagonal nut 6, and the anti-loosening block 13 cooperates with the hexagonal positioning groove 402 to lock the hexagonal nut 6 and the hexagonal bolt 5 respectively, so that the two cannot rotate by themselves, thereby avoiding the impact and vibration generated during the operation of the rotary tiller and the rotary tiller shaft 1 causing the loosening of the hexagonal bolt 5 and the hexagonal nut 6, ensuring that the connection between the soil cutting blade 3 and the mounting seat 2 is always tight, effectively improving the stability of the operation of the rotary tiller.

[0044] like Fig.10As shown, a dustproof outer slide cylinder 14 is fixedly installed on the top of the telescopic screw 12, and the opening of the dustproof outer slide cylinder 14 faces the telescopic screw cylinder 8. The dustproof outer slide cylinder 14 is slidably sleeved on the telescopic screw cylinder 8, and an elastic member 15 is fixedly installed on the top of the dustproof outer slide cylinder 14. The anti-loosening block 13 is fixedly installed on the top of the elastic member 15; specifically, by setting the dustproof outer slide cylinder 14, the dustproof outer slide cylinder 14 is slidably sleeved on the telescopic screw cylinder 8. As the telescopic screw 12 and the telescopic screw cylinder 8 undergo relative spiral expansion and contraction, the dustproof outer slide cylinder 14 will also perform relative spiral sliding on the telescopic screw cylinder 8, so that the telescopic screw 12 is always located inside the dustproof outer slide cylinder 14, so that the dustproof outer slide cylinder 14 suspends the telescopic screw 12 to play a protective role, realizing moisture-proof and The dust-proof function prevents the threaded engagement of the telescopic screw 12 and the telescopic screw barrel 8 from being affected by rust and dust and failing to transmit normally. By arranging the elastic member 15, when the telescopic screw 12 drives the anti-loosening block 13 to move toward the hexagonal nut 6 and presses the hexagonal nut 6, it will simultaneously drive the elastic member 15 to be compressed, thereby improving the tightness of the connection between the anti-loosening block 13 and the hexagonal nut 6. At the same time, during the operation of the rotary tiller shaft 1, each anti-loosening block 13 will have a tendency to move outward under the action of centrifugal force. The elastic member 15 provides an elastic sliding margin for the anti-loosening block 13, so that the anti-loosening block 13 can further press the hexagonal nut 6 during the rotation of the rotary tiller shaft 1, thereby improving the stability of the connection between the soil cutting blade 3 and the mounting seat 2.

[0045] like Fig.10 As shown, the anti-loosening block 13, the elastic member 15 and the dustproof outer slide cylinder 14 are provided with the same lubrication channel 1301, the lubrication channel 1301 is communicated with the interior of the dustproof outer slide cylinder 14, the anti-loosening block 13 is provided with a placement groove on the side facing the hexagonal nut 6, the placement groove is communicated with the lubrication channel 1301, a through-hole pressing plate 16 is placed inside the placement groove, and a blocking rod 17 adapted to the lubrication channel 1301 is fixedly installed at the bottom of the through-hole pressing plate 16; specifically, by providing the lubrication channel 1301, after the fixed structure is used for a long time, the control knob 7 can be used to drive the anti-loosening block 13 to disengage from the hexagonal nut 6 , then pinch the through-hole pressure plate 16 and pull the blocking rod 17 out from the top of the lubrication channel 1301, then drip the lubricating oil into the lubrication channel 1301, and use the control knob 7 to drive the anti-loosening block 13 to move up and down, so that the telescopic screw 12 and the telescopic screw barrel 8 can spirally extend and retract with each other, so that the lubricating oil can lubricate the meshing part of the telescopic screw 12 and the telescopic screw barrel 8 by itself, thereby maintaining the telescopic screw barrel 8 and the telescopic screw 12. After the lubrication is completed, reset the through-hole pressure plate 16 and the anti-loosening block 13. At this time, the anti-loosening block 13 will be close to the hexagonal nut 6, so that the hexagonal nut 6 presses the through-hole pressure plate 16 to achieve the sealing of the lubrication channel 1301.

[0046] like Figure 8As shown, a plurality of cover plate grooves 102 are provided on the circumferential side of the rotary tiller shaft 1, and the plurality of cover plate grooves 102 correspond to the positions of the plurality of operating grooves 101, respectively. Figure 2 As shown, dust cover plates 18 are rotatably mounted inside the cover plate slots 102. Figure 3 As shown, the top of the dust cover 18 is slidably mounted with an elastic latch 19. Figure 8 As shown, a card slot 103 is opened on the bottom inner wall of the operating groove 101, and the bottom end of the elastic latch 19 extends to the inside of the operating groove 101 and is adapted to the card slot 103; specifically, by arranging a dust cover 18, the dust cover 18 can cooperate with the cover groove 102, so that one end of the operating groove 101 is closed, and the elastic latch 19 is slid to engage the elastic latch 19 with the card slot 103, and the dust cover 18 is locked inside the cover groove 102, and the other end of the operating groove 101 is closed by the anti-loosening block 13, so that after the soil cutting blade 3 is installed, the interior of the operating groove 101 is in a sealed state, which plays a role in moisture-proof and dust-proof, and extends the service life of the fixed structure.

[0047] like Figure 8 As shown, a lubrication drain hole 104 is provided on the inner wall of the cover plate groove 102, and the position of the lubrication drain hole 104 corresponds to the position of the relay gear 11; specifically, by setting the lubrication drain hole 104, after lubrication maintenance of the telescopic screw 12 and the telescopic screw barrel 8, the elastic latch 19 can be slid to unlock the dust cover 18, and then the dust cover 18 can be opened, and lubrication oil can be dripped into the inside of the operating groove 101 with the help of the lubrication drain hole 104 on the cover plate groove 102, so that the lubrication oil drips on the two relay gears 11, and then the control knob 7 is rotated to make each linkage gear 9 and the relay gear 11 mesh with each other for transmission, so that the lubrication oil can cover each gear, thereby realizing the lubrication maintenance of the linkage gear 9 and the relay gear 11.

[0048] like Figure 6As shown, the locking sleeve 4 is provided with an outer shell 20, one end of the outer shell 20 passes through four mounting holes 401 in sequence, the mounting holes 401 are located between the head of the hexagonal bolt 5 and the hexagonal nut 6, and the inner rubber shell 21 is fixedly installed inside the outer shell 20, and the screw of the hexagonal bolt 5 is located inside the rubber inner shell 21; specifically, by providing the outer shell 20, after the soil cutting blade 3 is inserted into the mounting blade seat 2, the outer shell 20 is first inserted into each mounting hole 401 in sequence, so that the outer shell 20 can lock the soil cutting blade 3. The installation knife seat 2 and the locking sleeve 4 are first connected together, and then the hexagonal bolt 5 is inserted into the rubber inner shell 21, and the hexagonal nut 6 is screwed on the hexagonal bolt 5, so that the screw of the hexagonal bolt 5 is located inside the rubber inner shell 21. During the operation of the rotary tiller shaft 1, the outer shell 20 and the rubber inner shell 21 can separate the screw of the hexagonal bolt 5 from the installation knife seat 2, the locking sleeve 4, and the soil cutting blade 3, thereby effectively preventing the thread of the hexagonal bolt 5 from wearing and extending the service life of the hexagonal bolt 5 and the hexagonal nut 6.

[0049] like Figure 7 As shown, the head of the hexagonal bolt 5 is sleeved with a hexagonal rubber pad 22, and the hexagonal rubber pad 22 is located inside the hexagonal positioning groove 402; specifically, by providing the hexagonal rubber pad 22, before installing the hexagonal bolt 5, it is first sleeved on the head of the hexagonal bolt 5, and then the hexagonal bolt 5 is installed on the mounting tool holder 2 and the locking sleeve 4, so that the head of the hexagonal bolt 5 and the hexagonal rubber pad 22 are inserted into the hexagonal positioning groove 402 at the same time, so that the hexagonal rubber pad 22 separates the head of the hexagonal bolt 5 from the locking sleeve 4, effectively preventing the head of the hexagonal bolt 5 from being worn.

[0050] like Figure 5 As shown, an anti-drop slide plate 23 is slidably installed on the side of the locking sleeve 4 away from the hexagonal nut 6, and the position of the anti-drop slide plate 23 corresponds to the position of the hexagonal bolt 5; specifically, by setting the anti-drop slide plate 23, after the hexagonal bolt 5 is inserted, the head of the hexagonal bolt 5 is located inside the hexagonal positioning groove 402, and then the anti-drop slide plate 23 is slid so that the anti-drop slide plate 23 is located on one side of the head of the hexagonal bolt 5, thereby intercepting and limiting the hexagonal bolt 5, preventing the hexagonal bolt 5 from falling out of the hexagonal positioning groove 402 during the process of screwing and installing with the hexagonal nut 6, so that the hexagonal bolt 5 is always located inside the hexagonal positioning groove 402 and is positioned, which facilitates the assembly of the hexagonal bolt 5 and the hexagonal nut 6.

[0051] In summary: installation of the blade: first, sleeve the locking sleeve 4 on the mounting knife seat 2 from one end of the rotary tiller shaft 1, and then plug the soil cutting blade 3 on the mounting knife seat 2. At this time, first insert the outer shell 20 into each mounting through hole 401 in turn, so that the outer shell 20 connects the soil cutting blade 3, the mounting knife seat 2 and the locking sleeve 4 together first, and then sleeve it on the head of the hexagonal bolt 5, and then insert the hexagonal bolt 5 into the inside of the rubber inner shell 21, so that the hexagonal head of the hexagonal bolt 5 and the hexagonal rubber pad 22 are simultaneously stuck in the hexagonal positioning groove 402 on one side of the locking sleeve 4, and then slide the anti-drop slide plate 23 so that the anti-drop slide plate 23 is located on one side of the head of the hexagonal bolt 5, intercept and limit the hexagonal bolt 5, and finally screw the hexagonal nut 6 on the tail end of the screw rod of the hexagonal bolt 5 until it is tightened to fix the soil cutting blade 3;

[0052] Anti-loosening of the blade: the hexagonal positioning groove 402 will play a positioning role for the hexagonal bolt 5, so that the position of the hexagonal bolt 5 after tightening is roughly the same each time. After the hexagonal nut 6 is screwed several turns along the thread line of the hexagonal bolt 5 and tightened, the side of the hexagonal nut 6 facing the anti-loosening block 13 will correspond to the position of the anti-loosening block 13, and then the control knob 7 is driven to rotate manually or with a hexagonal wrench, and then the telescopic screw barrel 8 is driven to rotate through the meshing linkage gear 9 and the relay gear 11, and then under the limiting action of the mutual sliding connection between the anti-loosening block 13 and the operating groove 101, the telescopic screw rod 12 is extended to the outside of the operating groove 101, and the elastic member 15 is compressed synchronously, thereby driving the anti-loosening block 13 to slide out of the operating groove 101 until it is plugged tightly with the hexagonal nut 6, so that the anti-loosening block The block 13 limits the hexagonal nut 6, and the anti-loosening block 13 cooperates with the hexagonal positioning groove 402 to lock the hexagonal nut 6 and the hexagonal bolt 5 respectively, so that the two cannot rotate by themselves, thereby avoiding the impact and vibration generated during the operation of the rotary tiller and the rotary tiller shaft 1, which may cause the hexagonal bolt 5 and the hexagonal nut 6 to loosen, ensuring that the connection between the soil cutting blade 3 and the mounting blade seat 2 is always tight, and anti-loosening is achieved. At the same time, during the operation of the rotary tiller shaft 1, each anti-loosening block 13 will have a tendency to move outward under the action of centrifugal force, and the elastic member 15 provides an elastic sliding margin for the anti-loosening block 13, so that the anti-loosening block 13 can further press the hexagonal nut 6 during the rotation of the rotary tiller shaft 1, thereby improving the stability of the connection between the soil cutting blade 3 and the mounting blade seat 2;

[0053] Maintenance of the anti-loosening assembly: After the fixed structure has been used for a long time, the control knob 7 can be used to drive the anti-loosening block 13 to disengage from the hexagonal nut 6, and then the through-hole pressure plate 16 can be pinched to pull the blocking rod 17 out from the top of the lubrication channel 1301, and then the lubricating oil can be dripped into the lubrication channel 1301, and the control knob 7 can be used to drive the anti-loosening block 13 to move up and down, so that the telescopic screw 12 and the telescopic barrel 8 can be spirally extended and retracted with each other, so that the lubricating oil can lubricate the meshing part of the telescopic screw 12 and the telescopic barrel 8 by itself, so as to achieve the maintenance of the telescopic barrel 8 and the telescopic screw 12. After the lubrication is completed, the through-hole pressure plate 16 and the anti-loosening block 13 can be separated. The block 13 is reset, and the anti-loosening block 13 will be close to the hexagonal nut 6 at this time, so that the hexagonal nut 6 presses the through-hole pressure plate 16 to achieve the sealing of the lubrication channel 1301, and then the sliding elastic pin 19 unlocks the dust cover 18, and then the dust cover 18 is opened, and the lubrication drain hole 104 on the cover groove 102 is used to drip lubricating oil into the inside of the operating groove 101, so that the lubricating oil drips on the two relay gears 11, and then the control knob 7 is rotated to make each linkage gear 9 and the relay gear 11 mesh with each other for transmission, so that the lubricating oil can cover each gear, thereby realizing the lubrication maintenance of the linkage gear 9 and the relay gear 11.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An anti-loosening fixing structure for a rotary cutter shaft of an agricultural machinery, characterized in that: The invention comprises a rotary tillage blade shaft (1), a plurality of mounting blade seats (2) being fixedly mounted on the side wall of the rotary tillage blade shaft (1), each of the mounting blade seats (2) being plugged with a soil cutting blade (3), each of the mounting blade seats (2) being sleeved with a locking sleeve (4), both sides of the mounting blade seat (2), one side of the locking sleeve (4) and the rear end side wall of the soil cutting blade (3) being provided with mounting through holes (401), one side of the locking sleeve (4) being provided with a hexagonal bolt (5), the screw tail end of the hexagonal bolt (5) passing through the four mounting through holes (401) in sequence. 401) and is screwed with a hexagonal nut (6), a hexagonal positioning groove (402) is provided on a side of the locking sleeve (4) away from the hexagonal nut (6), the hexagonal positioning groove (402) is adapted to the head of the hexagonal bolt (5), a plurality of operating grooves (101) are provided inside the rotary tiller shaft (1), both ends of the operating groove (101) are connected to the outside, the positions of the plurality of operating grooves (101) respectively correspond to the positions of the plurality of hexagonal nuts (6), and anti-loosening components are provided inside the operating grooves (101); The anti-loosening component is used to lock the hexagonal nut (6) after the hexagonal bolt (5) and the hexagonal nut (6) are screwed together, so that the hexagonal nut (6) cannot rotate on its own; The anti-loosening assembly comprises a control knob (7) rotatably mounted on the inner wall of the bottom of the operating slot (101), a telescopic screw barrel (8) and two relay shafts (10); the bottom ends of the control knob (7) and the telescopic screw barrel (8) are both fixedly sleeved with a linkage gear (9); the two relay shafts (10) are both located between the control knob (7) and the telescopic screw barrel (8); the top ends of the two relay shafts (10) are both fixedly sleeved with a relay gear (11); the two relay gears (11) are meshed with each other and respectively meshed with the two linkage gears (9); the top end of the telescopic screw barrel (8) is threadedly connected with a telescopic screw rod (12); the top end of the telescopic screw rod (12) is provided with an anti-loosening block (13); the anti-loosening block (13) is slidably mounted inside the top end of the operating slot (101); the anti-loosening block (13) is located at the bottom of the hexagonal nut (6) and is adapted to the hexagonal nut (6); A plurality of cover plate grooves (102) are provided on the circumferential side of the rotary tiller shaft (1), the plurality of cover plate grooves (102) respectively corresponding to the positions of the plurality of operating grooves (101), dust cover plates (18) are rotatably mounted inside the cover plate grooves (102), elastic latches (19) are slidably mounted on the tops of the dust cover plates (18), a clamping groove (103) is provided on the bottom inner wall of the operating groove (101), the bottom end of the elastic latch (19) extends into the interior of the operating groove (101) and matches the clamping groove (103), and the cover plate groove (103) is provided with a plurality of cover plate grooves (102). 2) is provided with a lubrication drain hole (104), the position of the lubrication drain hole (104) corresponds to the position of the relay gear (11), an outer shell (20) is provided inside the locking sleeve (4), one end of the outer shell (20) passes through four mounting through holes (401) in sequence, the mounting through holes (401) are located between the head of the hexagonal bolt (5) and the hexagonal nut (6), a rubber inner shell (21) is fixedly installed inside the outer shell (20), and the screw of the hexagonal bolt (5) is located inside the rubber inner shell (21).

2. The anti-loosening fixing structure of the rotary cutter shaft of agricultural machinery according to claim 1, characterized in that: A dustproof outer slide cylinder (14) is fixedly mounted on the top of the telescopic screw rod (12); the opening of the dustproof outer slide cylinder (14) faces the telescopic screw cylinder (8); the dustproof outer slide cylinder (14) is slidably sleeved on the telescopic screw cylinder (8); an elastic member (15) is fixedly mounted on the top of the dustproof outer slide cylinder (14); and the anti-loosening block (13) is fixedly mounted on the top of the elastic member (15).

3. The anti-loosening fixing structure of the rotary cutter shaft of agricultural machinery according to claim 2, characterized in that: The anti-loosening block (13), the elastic member (15) and the dustproof outer slide cylinder (14) are provided with a same lubrication channel (1301) inside, and the lubrication channel (1301) is communicated with the inside of the dustproof outer slide cylinder (14). The anti-loosening block (13) is provided with a placement groove on the side facing the hexagonal nut (6), and the placement groove is communicated with the lubrication channel (1301). A through-hole pressure plate (16) is placed inside the placement groove, and a blocking rod (17) adapted to the lubrication channel (1301) is fixedly installed at the bottom of the through-hole pressure plate (16).

4. The anti-loosening fixing structure of the rotary cutter shaft of agricultural machinery according to claim 1, characterized in that: A hexagonal rubber pad (22) is sleeved on the head of the hexagonal bolt (5), and the hexagonal rubber pad (22) is located inside the hexagonal positioning groove (402).

5. The anti-loosening fixing structure of the rotary cutter shaft of agricultural machinery according to claim 1, characterized in that: An anti-drop slide plate (23) is slidably mounted on a side of the locking sleeve (4) facing away from the hexagonal nut (6), and the position of the anti-drop slide plate (23) corresponds to the position of the hexagonal bolt (5).

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