Rotary cultivator with adjustable tilling depth and angle

Abstract

The invention discloses a tilling depth and angle adjustable rotary cultivator which comprises an energy storage unit, a rack, a driving motor and a rotary tillage piece, the energy storage unit is installed on the upper portion of the rack, power is supplied to the driving motor through the energy storage unit, and the rotary cultivator further comprises fixing arms installed on the front side and the rear side of the rack. The rotary support is rotatably installed between the fixing arms on the front side and the rear side, buffer supporting devices are installed at the front end and the rear end of the rotary support, a rotary shaft is installed between the buffer supporting devices on the two sides, the rotary tillage pieces are annularly distributed outside the rotary shaft, a hydraulic ejector rod is rotatably installed at the bottom of the rack, and the hydraulic ejector rod is connected with the rotary tillage pieces. The movable end of the hydraulic ejector rod is connected with the buffer supporting device.

Description

Technical Field

[0001] The invention relates to a rotary tiller with adjustable tillage depth and angle. Background Art

[0002] As an important part of modern agricultural machinery, the rotary tiller is a tilling machine that is used in conjunction with a tractor to complete ploughing and harrowing operations. It has been widely used in agricultural production because of its strong soil crushing ability and flat surface after ploughing. The rotary tiller can make the originally compacted soil loose and breathable instantly through the high-speed rotation of the blade, creating a good growth environment for crops. Its core working principle is to use the rotating blade to cut the root stubble buried below the surface, which is convenient for the seeder to operate and provide a good seed bed for later sowing.

[0003] As an indispensable tillage machine in modern agriculture, the performance of rotary tillers is directly related to soil tillage quality and agricultural production efficiency. Traditional rotary tillers have problems such as inaccurate tillage depth adjustment, poor adaptability, and complex operation during operation, which seriously restrict the improvement of agricultural production efficiency.

[0004] Based on the above problems, we designed a rotary tiller with adjustable tillage depth and angle by rotating. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a rotary tiller with adjustable tillage depth and angle which can adjust the tillage depth by rotation.

[0006] To solve the above problems, the present invention adopts the following technical solutions:

[0007] A rotary tiller with adjustable tillage depth and angle comprises an energy storage unit, a frame, a drive motor and a rotary tillage blade, wherein the energy storage unit is installed on the upper part of the frame, the drive motor is powered by the energy storage unit, and further comprises fixed arms installed on the front and rear sides of the frame, and a rotating bracket rotatably installed between the fixed arms on the front and rear sides, buffer support devices are installed at the front and rear ends of the rotating bracket, a rotating shaft is installed between the buffer support devices on both sides, the rotary tillage blade is annularly distributed on the outside of the rotating shaft, a hydraulic push rod is rotatably installed at the bottom of the frame, the movable end of the hydraulic push rod is connected to the buffer support device, the drive motor is installed on the top of the rotating bracket, a transmission device is cooperated between the drive motor and the rotating shaft, an auxiliary support device is installed at the bottom of the frame, and an arc-shaped mudguard is fixed on the inner side of the rotating bracket and above the rotary tillage blade, and the transmission device passes through the mudguard.

[0008] Preferably, the buffer support device includes a base and a rotating seat. The base is fixed to the rotating bracket. The rotating seat is sleeved outside the base. A first bearing and a first shaft seal are provided between the rotating seat and the base. The first shaft seal is sealed outside the first bearing. Through holes are machined at the positions corresponding to the base on the front and rear sides of the rotating bracket. The rotating shaft passes through the through holes and then is inserted into the base. A second bearing and a second shaft seal are provided between the rotating shaft and the base. The second shaft seal is sealed inside the second bearing. A sleeve is provided on the outer wall of the rotating seat. The sleeve communicates with the rotating seat. A pipe cover is flange-connected to the upper end of the sleeve. A slide rod is inserted through the pipe cover. One end of the slide rod extends into the sleeve after passing through the pipe cover. A piston head is machined at this end. The diameter of the piston head is larger than the diameter of the slide rod. A piston ring is clamped on the outer wall of the piston head. A seal is formed between the piston ring and the inner wall of the sleeve. A spring is sleeved on the slide rod. The spring acts between the piston head and the pipe cover. The movable end of the hydraulic ejector rod is inserted into the slide rod. A bolt for fixing the movable end of the hydraulic ejector rod is screwed on the outer wall of the slide rod. The bolt limits the downward movement of the slide rod. Lubricating oil is filled in the rotating seat. An oil drain bolt is screwed at the bottom of the rotating seat.

[0009] Preferably, the through hole is a tapered hole, and its diameter gradually decreases towards the direction of the base. A sealing ring is provided between the base and the rotating bracket. The thickness of the sealing ring gradually decreases towards the direction of the rotating shaft. A seal is formed after the sealing ring contacts the rotating shaft.

[0010] Preferably, the transmission device includes a shaft tube, a lower gearbox, an upper gearbox and a transmission shaft. The middle part of the rotating shaft is disconnected. The lower gearbox is arranged at the disconnected position of the rotating shaft. Two connecting shafts are arranged in the lower gearbox. A coupling tube is arranged between the two connecting shafts. Screws are arranged between the coupling tube and the connecting shafts. The end of the connecting shaft away from the coupling tube is flange-connected to the rotating shaft. A third bearing and a third shaft seal are arranged between the connecting shaft and the lower gearbox. The third shaft seal is sealed outside the third bearing. A through oil guiding hole is arranged at the axis of the rotating shaft. The connecting shaft has an axis hole corresponding to the oil guiding hole. An oil hole penetrates radially through the outer wall of one of the connecting shafts, and the lubricating oil liquid passes through the oil hole. A first driven bevel gear is fixed on the other connecting shaft. The shaft tube is flange-connected between the upper gearbox and the lower gearbox. The shaft tube passes through the rotating bracket and is fixed to the rotating bracket. The transmission shaft is inserted through the axis of the shaft tube. A fourth bearing is arranged between the transmission shaft and the lower gearbox. A first driving bevel gear is fixed at the lower end of the transmission shaft. The first driving bevel gear meshes with the first driven bevel gear. A bearing seat is arranged at the inner top of the upper gearbox. A fifth bearing is arranged between the upper end of the transmission shaft and the bearing seat. A second driven bevel gear is fixed at the upper end of the transmission shaft close to the upper end. A first connecting shaft is rotatably installed through the upper gearbox. The first connecting shaft is perpendicular to the transmission shaft. A sixth bearing and a fifth shaft seal are arranged between the first connecting shaft and the upper gearbox. The fifth shaft seal is sealed outside the sixth bearing. The output shaft of the driving motor is fixed to the first connecting shaft. A second driving bevel gear is fixed at the end of the first connecting shaft away from the driving motor. The second driving bevel gear meshes with the second driven bevel gear. An oil filling hole for filling lubricating oil is machined at the top of the upper gearbox, and a plunger is arranged at the oil filling hole.

[0011] Preferably, a sealing ring is clamped between the rotating shaft and the connecting shaft.

[0012] Preferably, an inner pipeline is arranged at the axis of the shaft tube. The upper end of the inner pipeline extends into the upper gearbox. An oil return channel is formed between the inner pipeline and the shaft tube. A clamping plate is arranged on the outer wall of the inner pipeline. The clamping plate is clamped between the upper gearbox and the shaft tube. A plurality of oil passing holes are annularly distributed on the plate surface of the clamping plate. The transmission shaft passes through the inner pipeline. A spiral piece is fixed outside the transmission shaft. The upper and lower ends of the spiral piece both extend outside the inner pipeline 941. The liquid level height of the lubricating oil liquid reaches the inner pipeline.

[0013] Preferably, first oil holes are annularly distributed on the surface of the second driven bevel gear. An oil injection cover is threadedly connected to the upper end of the inner pipe. The transmission shaft passes through the oil injection cover, and the transmission shaft is in clearance fit with the oil injection cover. A plurality of conical oil injection holes are annularly distributed on the surface of the oil injection cover. The diameter of the oil injection holes gradually decreases upward, and the oil injection holes correspond to the second driven bevel gear.

[0014] Preferably, a conical oil distribution surface is machined at the upper end of the second driven bevel gear, and fins are annularly distributed on the oil distribution surface.

[0015] Preferably, the upper edge height of the inner pipe reaches the position of the sixth bearing.

[0016] Preferably, the auxiliary support device includes a first hydraulic jack, a passive telescopic rod, a mounting plate, a wheel shaft and a support wheel. The first hydraulic jack and the passive telescopic rod are both fixed to the bottom of the frame. The mounting plate is fixedly installed between the first hydraulic jack and the passive telescopic rod. A bearing seat is fixedly installed at the bottom of the mounting plate. The wheel shaft is rotatably installed through the bearing seat. A seventh bearing is fitted between the wheel shaft and the bearing seat. Two support wheels are provided and are respectively fixed to both ends of the wheel shaft.

[0017] The beneficial effects of the present invention are as follows:

[0018] Advantage one: This device is driven by electricity, which is more energy-saving and environmentally friendly.

[0019] Advantage two: This device adjusts the angle of the rotating bracket through the telescoping of the hydraulic jack, so that the depth of the rotary tillage blades plowing into the soil can be changed, and it can be adjusted adaptively according to the planting needs, and the operation is simple and convenient.

[0020] Advantage three: This device adopts a specially designed transmission device, and only needs to add lubricating oil at one position to achieve lubrication at all positions of this device, and the maintenance is very convenient.

[0021] Advantage four: This device can buffer the impact force during forward movement during rotary tillage, and plays a certain protective role on components such as rotary tillage blades and rotating shafts.

[0022] Advantage five: This device has a simple structure and low cost, and is suitable for popularization and use. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0024] Figure 1 Structural schematic diagram of the present invention;

[0025] Figure 2 Side view of the rotating bracket;

[0026] Figure 3 Schematic diagram when the rotating bracket rotates to shallow tillage;

[0027] Figure 4 Schematic diagram when the rotating bracket rotates to leave the ground;

[0028] Figure 5 Schematic diagram when the device is mounted by a vehicle;

[0029] Figure 6 Installation schematic diagram of the buffer support device;

[0030] Figure 7 For Figure 6 Enlarged view at B;

[0031] Figure 8 For Figure 2 Cross-sectional view at A;

[0032] Figure 9 For Figure 2 Cross-sectional view at C;

[0033] Figure 10 For Figure 2 Cross-sectional view at D;

[0034] Figure 11 For Figure 10 Enlarged view at E;

[0035] Figure 12 For Figure 10 Enlarged view at F. Detailed implementation manners

[0036] All features disclosed in this specification, or all steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any way.

[0037] Any feature disclosed in this specification (including any additional claims, abstract and drawings) can be replaced by other equivalent or alternative features with similar purposes, unless specifically stated. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end", "length", "outer end", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0039] In addition, in the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, terms such as "arranged", "socketed", "connected", "penetrated", "plugged in", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Refer to Figures 1 to 5 A rotary tiller with adjustable tillage depth and angle as shown, including an energy storage unit 1, a frame 2, a drive motor 3 and rotary tillage blades 71. The energy storage unit 1 is installed on the upper part of the frame 2. The drive motor 3 is powered by the energy storage unit 1. It also includes fixed arms 4 installed on the front and rear sides of the frame 2, and a rotating bracket 5 rotatably installed between the front and rear fixed arms 4. Buffer support devices 6 are installed at the front and rear ends of the rotating bracket 5. A rotating shaft 7 is installed between the buffer support devices 6 on both sides. The rotary tillage blades 71 are annularly distributed outside the rotating shaft 7. A hydraulic jack 8 is rotatably installed at the bottom of the frame 2. The movable end of the hydraulic jack 8 is connected to the buffer support device 6. The drive motor 3 is installed on the top of the rotating bracket 5. A transmission device 9 is provided between the drive motor 3 and the rotating shaft 7. An auxiliary support device 10 is installed at the bottom of the frame 2. Inside the rotating bracket 5, an arc-shaped mudguard 5555 is fixed above the rotary tillage blades 71. The transmission device 9 passes through the mudguard 5555.

[0042] In the above technical solution, the rotating bracket 5 rotates along the node of the fixed arm 4 through the extension and retraction of the hydraulic jack 8. When the rotating bracket 5 rotates to a vertical state, the rotating shaft 7 is in a low position, and the rotary tillage blade 71 enters the soil to a maximum depth.

[0043] As the hydraulic jack 8 gradually retracts, the depth of the rotary tillage blade 71 entering the soil gradually decreases until the rotary tillage blade 71 is completely separated from the soil.

[0044] In the above technical solution, a structural form using electric drive is provided. The reason for this is that the existing vehicles have gradually developed from the original diesel engines to electric drives.

[0045] In this technical solution, by adopting electric drive, the energy is cleaner, and the storage capacity of the energy storage unit 1 is greater than 10 degrees, which can meet the needs of long-term agricultural operations.

[0046] In addition, by utilizing the deadweight of the energy storage unit 1, the frame 2 can also have sufficient downward pressure. When rotary tilling, sufficient downward pressure can be maintained to ensure stability during rotary tilling.

[0047] The rear end support capacity of some vehicles is insufficient, therefore, an auxiliary support device 10 is additionally provided in the device. During rotary tillage, the auxiliary support device 10 can be used to support the surface of the soil to provide a certain amount of auxiliary support force.

[0048] When the rotary tillage is completed and the position needs to be moved, the rotary tillage blade 71 is supported and lifted off the ground by the auxiliary support device 10, so as to avoid the rotary tillage blade from scratching the ground during the transfer process.

[0049] In the above technical solution, a specially designed buffer support device 6 is used to alleviate the impact force during the rotary tillage process.

[0050] See also Figure 2 , Figure 6 , Figure 7 and Figure 8As shown in the figure, the buffer support device 6 includes a base 61 and a rotating seat 62. The base 61 is fixed to the rotating bracket 5. The rotating seat 62 is sleeved outside the base 61. A first bearing 63 and a first shaft seal 64 are provided between the rotating seat 62 and the base 61. The first shaft seal 64 is sealed outside the first bearing 63. Through holes 51 are machined at the front and rear sides of the rotating bracket 5 corresponding to the position of the base 61. The rotating shaft 7 passes through the through holes 51 and then is inserted into the base 61. A second bearing 65 and a second shaft seal 66 are provided between the rotating shaft 7 and the base 61. The second shaft seal 66 is sealed inside the second bearing 65. A sleeve 67 is provided on the outer wall of the rotating seat 62. The sleeve 67 communicates with the rotating seat 62. A pipe cap 68 is flange-connected to the upper end of the sleeve 67. A slide bar 69 is inserted through the pipe cap 68. One end of the slide bar 69 extends into the sleeve 67 after passing through the pipe cap 68. A piston head 610 is machined at this end. The diameter of the piston head 610 is larger than the diameter of the slide bar 69. A piston ring 611 is clamped on the outer wall of the piston head 610. A seal is formed between the piston ring 611 and the inner wall of the sleeve 67. A spring 612 is sleeved on the slide bar 69. The spring 612 acts between the piston head 610 and the pipe cap 68. The movable end of the hydraulic jack 8 is inserted into the slide bar 69. A bolt 613 for fixing the movable end of the hydraulic jack 8 is screwed on the outer wall of the slide bar 69. The bolt 613 limits the downward movement of the slide bar 69; Lubricating oil is filled in the rotating seat 62.

[0051] An oil drain bolt 686 is screwed into the bottom of the rotating seat 62.

[0052] In the above technical solution, the lubricating oil filled lubricates the meshing bevel gears. At the same time, the lubricating oil will enter the sleeve 67 to lubricate the sliding of the piston ring 611. When the hydraulic jack 8 jacks up, through the contact limit between the bolt 613 and the pipe cap 68, the hydraulic jack 8 can push the sleeve 67 to displace when jacking up.

[0053] After the hydraulic jack 8 jacks up in place and the rotary tillage blade 71 reaches the tillage depth, the frame 2 moves to the right under the towing of the vehicle. When the rotary tillage blade 71 encounters a relatively hard soil block during rotary tillage, the resistance of the frame 2 moving to the right will increase. Under the action of this resistance, the sleeve 67 can displace slightly along the slide bar 69. When displacing, the spring 612 is compressed. Thus, during rotary tillage, the force on the hydraulic jack 8 is relieved, and at the same time, an elastic displacement space is given to the rotary tillage blade 71, playing a role in protecting the rotary tillage blade 71; At the same time, the lubricating oil can also form a damping for the rebound of the piston ring 611.

[0054] When performing the operation, first, the hydraulic ejector rod 8 is in a retracted state. At this time, the rotary tillage blade 71 is separated from the ground. Through the operation of the drive motor 3, the transmission device 9 drives the rotating shaft 7 to rotate. When the rotational speed of the rotating shaft 7 is stable, the hydraulic ejector rod 8 is gradually lifted, so that the rotary tillage blade 71 slowly cuts into the soil. This operation method avoids instantaneous impact on the rotary tillage blade 71 and reduces the deformation probability of the rotary tillage blade 71.

[0055] Refer to Figure 8 As shown, the through hole 51 is a tapered hole, and its diameter gradually decreases towards the direction of the base 61. A sealing ring 52 is provided between the base 61 and the rotating bracket 5. The thickness of the sealing ring 52 gradually decreases towards the direction of the rotating shaft 7. After the sealing ring 52 contacts the rotating shaft 7, a seal is formed.

[0056] In the above technical solution, the tapered through hole 51 is adopted, which is convenient for cleaning the soil entering the through hole 71 during water flushing.

[0057] The setting of the sealing ring 52 plays a certain sealing role.

[0058] Refer to Figure 2 、 Figure 9 、 Figure 10 and Figure 11As shown in the figure, the transmission device 9 includes a shaft tube 91, a lower gearbox 92, an upper gearbox 93 and a transmission shaft 94. The middle part of the rotating shaft 7 is disconnected. The lower gearbox 92 is arranged at the disconnected position of the rotating shaft 7. Two connecting shafts 95 are arranged in the lower gearbox 92. A coupling tube 96 is arranged between the two connecting shafts 95. A screw 97 is arranged between the coupling tube 96 and the connecting shaft 95. The end of the connecting shaft 95 far from the coupling tube 96 is flange-connected to the rotating shaft 7. A third bearing 98 and a third shaft seal 99 are arranged between the connecting shaft 95 and the lower gearbox 92. The third shaft seal 99 is sealed outside the third bearing 98. A through oil guiding hole 771 is arranged at the axis of the rotating shaft 7. The connecting shaft 95 has an axis hole 955 corresponding to the oil guiding hole 771. An oil hole 956 penetrates radially at the outer wall of one of the connecting shafts 95. The lubricating oil passes through the oil hole 956. A first driven bevel gear 910 is fixed on the other connecting shaft 95. The shaft tube 91 is flange-connected between the upper gearbox 92 and the lower gearbox 93. The shaft tube 91 passes through the rotating bracket 5 and is fixed to the rotating bracket 5. The transmission shaft 94 is inserted through the axis of the shaft tube 91. A fourth bearing 911 is arranged between the transmission shaft 94 and the lower gearbox 93. A first driving bevel gear 912 is fixed at the lower end of the transmission shaft 94. The first driving bevel gear 912 meshes with the first driven bevel gear 910. A bearing seat 913 is arranged at the inner top of the upper gearbox 93. A fifth bearing 914 is arranged between the upper end of the transmission shaft 94 and the bearing seat 913. A second driven bevel gear 915 is fixed at the upper end of the transmission shaft 94 close to the upper end. A first connecting shaft 916 is rotatably installed through the upper gearbox 93. The first connecting shaft 916 is perpendicular to the transmission shaft 94. A sixth bearing 917 and a fifth shaft seal 918 are arranged between the first connecting shaft 916 and the upper gearbox 93. The fifth shaft seal 918 is sealed outside the sixth bearing 917. The output shaft of the driving motor 3 is fixed to the first connecting shaft 916. A second driving bevel gear 919 is fixed at the end of the first connecting shaft 916 far from the driving motor 3. The second driving bevel gear 919 meshes with the second driven bevel gear 915. An oil filling hole for filling lubricating oil is processed at the top of the upper gearbox 93. A plunger 999 is arranged at the oil filling hole.

[0059] The transmission ratio of the first driving bevel gear 912 and the first driven bevel gear 910 is 4:1, that is, when the first driving bevel gear 912 rotates 4 circles, the first driven bevel gear 910 rotates 1 circle. Through this transmission ratio, the driving resistance of the driving motor 3 can be reduced, and then a relatively low-power driving motor 3 can be selected as the power unit.

[0060] The transmission ratio of the second driving bevel gear and the second driven bevel gear is 2:1, that is, when the second driving bevel gear rotates 2 circles, the second driven bevel gear rotates 1 circle. This transmission ratio can further amplify the torque and reduce the driving resistance of the driving motor 3.

[0061] In the above technical solution, lubricating oil liquid is injected through the top of the upper gearbox 93. The lubricating oil liquid seals each bearing and bevel gear, and anti-leakage is carried out through each shaft seal.

[0062] The rotating shaft 7 with a hollow design facilitates the flow of the lubricating oil liquid from the lower gearbox 92 to the rotating seats 62 at both ends.

[0063] In the above technical solution, two sections of the rotating shaft 7 are adopted, which is convenient for manufacturing and assembly.

[0064] Refer to Figure 9 As shown, a sealing ring 772 is clamped between the rotating shaft 7 and the connecting shaft 95.

[0065] The sealing ring 772 can reduce the probability of oil leakage.

[0066] Refer to Figures 9 to 12 As shown, an inner pipeline 941 is arranged at the axis center of the shaft tube 91. The upper end of the inner pipeline 941 extends into the upper gearbox 93. A return oil channel 942 is formed between the inner pipeline 941 and the shaft tube 91. A clamping plate 943 is arranged on the outer wall of the inner pipeline 941. The clamping plate 943 is clamped between the upper gearbox 93 and the shaft tube 91. A plurality of oil passing holes 9991 are annularly distributed on the plate surface of the clamping plate 943. The transmission shaft 94 passes through the inner pipeline 941. A spiral piece 944 is fixed on the outside of the transmission shaft 94. The upper and lower ends of the spiral piece 944 both extend outside the inner pipeline 941. The liquid level height of the lubricating oil liquid reaches the inner pipeline 941.

[0067] In the above technical solution, the design of the inner pipeline 941 is adopted. When the transmission shaft 94 rotates, the lubricating oil liquid located in the lower gearbox 92 will be lifted. The lifted lubricating oil liquid is lifted into the upper gearbox 93 to lubricate the bevel gear set above.

[0068] In the above technical solution, when the transmission shaft 94 rotates at a high speed, the speed at which it lifts the lubricating oil liquid is greater than the gravity return oil speed of the return oil channel 942. At this time, the liquid level of the lubricating oil liquid will rise in the upper gearbox 93, and then lubricate the bearings in the upper gearbox 93.

[0069] The rotational speed of the transmission shaft 94 at high speed is 1000 - 1200 revolutions per minute.

[0070] The rotational speed of the transmission shaft 94 at medium speed is 800 - 1000 revolutions per minute.

[0071] Refer to Figure 11 As shown, the surface of the second driven bevel gear 915 is annularly distributed with first oil passing holes 9151. At the upper end of the inner pipe 941, an oil injection cover 9441 is threadedly connected. The transmission shaft 94 passes through the oil injection cover 9441, and the transmission shaft 94 is in clearance fit with the oil injection cover 9441. On the surface of the oil injection cover 9441, a plurality of conical oil injection holes 9442 are annularly distributed. The diameter of the oil injection holes 9442 gradually decreases upward, and the oil injection holes 9442 correspond to the second driven bevel gear 915.

[0072] In the above technical solution, through the specially designed oil injection cover 9441, after the lubricating oil liquid is lifted, the bevel gears in the upper gearbox 93 can be lubricated in a pressure jet manner.

[0073] Under this technical effect, only by maintaining a medium and low rotational speed of the transmission shaft 94 can the pressurized jet lubrication of the oil liquid be achieved.

[0074] Refer to Figure 11 As shown, a conical oil dividing surface 9152 is machined at the upper end of the second driven bevel gear 915, and fins 9153 are annularly distributed on the oil dividing surface 9152.

[0075] In this technical solution, the lubricating oil liquid sprayed above the second driven bevel gear 915 can be centrifugally thrown out through the fins 9153 to complete the lubrication of the bearings in the upper gearbox 93.

[0076] Refer to Figure 10 As shown, the upper edge height of the inner pipe 941 reaches the position of the sixth bearing 917.

[0077] Refer to Figure 1 and Figure 3 As shown, the auxiliary support device 10 includes a first hydraulic jack 101, a passive telescopic rod 102, a mounting plate 103, a wheel shaft 105 and a support wheel 104. The first hydraulic jack 101 and the passive telescopic rod 102 are both fixed to the bottom of the frame 1. The mounting plate 103 is fixedly installed between the first hydraulic jack 101 and the passive telescopic rod 102. A bearing seat is fixedly installed at the bottom of the mounting plate 103. The wheel shaft 105 is rotatably installed through the bearing seat. A seventh bearing is provided between the wheel shaft 105 and the bearing seat. Two support wheels 104 are provided and are respectively fixed to both ends of the wheel shaft.

[0078] This technical solution can raise the height of the frame 2, facilitating the vehicle to tow this device to move on the ground.

[0079] The foregoing has shown and described 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 by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A rotary tiller with adjustable tillage depth and angle, comprising an energy storage unit (1), a frame (2), a drive motor (3) and a rotary tillage blade (71), wherein the energy storage unit (1) is mounted on the upper part of the frame (2), and the drive motor (3) is powered by the energy storage unit (1), characterized in that: The invention also comprises fixed arms (4) mounted on the front and rear sides of the frame (2), and a rotating bracket (5) rotatably mounted between the fixed arms (4) on the front and rear sides, buffer support devices (6) being mounted on the front and rear ends of the rotating bracket (5), a rotating shaft (7) being mounted between the buffer support devices (6) on both sides, the rotary tillage blades (71) being distributed in an annular manner outside the rotating shaft (7), a hydraulic push rod (8) being rotatably mounted on the bottom of the frame (2), the movable end of the hydraulic push rod (8) being connected to the buffer support device (6), the driving motor (3) being mounted on the top of the rotating bracket (5), a transmission device (9) being matched between the driving motor (3) and the rotating shaft (7), an auxiliary support device (10) being mounted on the bottom of the frame (2), an arc-shaped mudguard (5555) being fixed on the inner side of the rotating bracket (5) and located above the rotary tillage blades (71), and the transmission device (9) passing through the mudguard (5555).

2. The rotary tiller with adjustable tillage depth and angle according to claim 1, characterized in that: The buffer support device (6) comprises a base (61) and a rotating base (62); the base (61) is fixed to the rotating bracket (5); the rotating base (62) is sleeved on the outside of the base (61); a first bearing (63) and a first shaft seal (64) are provided between the rotating base (62) and the base (61); the first shaft seal (64) is sealed on the outside of the first bearing (63); and the first shaft seal (64) is provided on the front and rear sides of the rotating bracket (5) at positions corresponding to the base (61). A through hole (51) is processed at the rotating seat (62), and the rotating shaft (7) is inserted into the base (61) after passing through the through hole (51). A second bearing (65) and a second shaft seal (66) are matched between the rotating shaft (7) and the base (61), and the second shaft seal (66) is sealed on the inner side of the second bearing (65). A sleeve (67) is arranged on the outer wall of the rotating seat (62), and the sleeve (67) is connected to the rotating seat (62). A flange is connected to the upper end of the sleeve (67). A pipe cover (68) is provided, through which a slide bar (69) is inserted. One end of the slide bar (69) passes through the pipe cover (68) and extends into the sleeve (67). A piston head (610) is processed on the end. The diameter of the piston head (610) is larger than the diameter of the slide bar (69). A piston ring (611) is clamped on the outer wall of the piston head (610). A seal is formed between the piston ring (611) and the inner wall of the sleeve (67). A spring (611) is sleeved on the slide bar (69). 12), the spring (612) acts between the piston head (610) and the pipe cover (68), the movable end of the hydraulic push rod (8) is inserted into the slide rod (69), and a bolt (613) for fixing the movable end of the hydraulic push rod (8) is screwed into the outer wall of the slide rod (69), and the bolt (613) forms a limit for the downward movement of the slide rod (69); the rotating seat (62) is filled with lubricating oil, and an oil drain bolt (686) is screwed into the bottom of the rotating seat (62).

3. The rotary tiller with adjustable tillage depth and angle according to claim 2, characterized in that: The through hole (51) is a tapered hole, the diameter of which gradually decreases toward the base (61). A sealing ring (52) is arranged between the base (61) and the rotating bracket (5). The thickness of the sealing ring (52) gradually decreases toward the rotating shaft (7). The sealing ring (52) forms a seal when in contact with the rotating shaft (7).

4. The rotary tiller with adjustable tillage depth and angle according to claim 3, characterized in that: The transmission device (9) comprises a shaft tube (91), a lower gear box (92), an upper gear box (93) and a transmission shaft (94); the middle of the rotating shaft (7) is disconnected; the lower gear box (92) is arranged at the disconnected position of the rotating shaft (7); two connecting shafts (95) are arranged in the lower gear box (92); a connecting tube (96) is provided between the two connecting shafts (95); screws (97) are provided between the connecting tube (96) and the connecting shaft (95); the end of the connecting shaft (95) away from the connecting tube (96) is flange-connected to the rotating shaft (7); a third bearing (98) and a third shaft seal (99) are provided between the connecting shaft (95) and the lower gear box (92). The third shaft seal (99) is sealed on the outer side of the third bearing (98). The axis of the rotating shaft (7) is provided with a through oil guide hole (771). The connecting shaft (95) has an axis hole (955) corresponding to the oil guide hole (771). An oil hole (956) is radially penetrated on the outer wall of one of the connecting shafts (95). Lubricating oil passes through the oil hole (956). A first driven bevel gear (910) is fixed on the other connecting shaft (95). The shaft tube (91) is flange-connected between the upper gear box (92) and the lower gear box (93). The shaft tube (91) passes through the rotating bracket (5) and is fixed to the rotating bracket (5). The transmission shaft (94 ) is inserted through the axis of the shaft tube (91), a fourth bearing (911) is matched between the transmission shaft (94) and the lower gear box (93), a first active bevel gear (912) is fixed to the lower end of the transmission shaft (94), the first active bevel gear (912) is meshed with the first driven bevel gear (910), a bearing seat (913) is provided at the inner top of the upper gear box (93), a fifth bearing (914) is matched between the upper end of the transmission shaft (94) and the bearing seat (913), and a second driven bevel gear (915) is fixed near the upper end of the transmission shaft (94); a first connecting shaft (916) is rotatably mounted through the upper gear box (93), the first connecting shaft (916) is perpendicular to the transmission shaft (94), a sixth bearing (917) and a fifth shaft seal (918) are provided between the first connecting shaft (916) and the upper gear box (93), the fifth shaft seal (918) is sealed on the outer side of the sixth bearing (917), the output shaft of the drive motor (3) is fixed to the first connecting shaft (916), a second active bevel gear (919) is fixed to the end of the first connecting shaft (916) away from the drive motor (3), the second active bevel gear (919) is meshed with the second driven bevel gear (915), a filling hole for filling lubricating oil is processed on the top of the upper gear box (93), and a plunger (999) is provided at the filling hole.

5. The rotary tiller with adjustable tillage depth and angle according to claim 4, characterized in that: A sealing ring (772) is sandwiched between the rotating shaft (7) and the connecting shaft (95).

6. The rotary tiller with adjustable tillage depth and angle according to claim 4, characterized in that: An inner pipe (941) is arranged at the axis of the shaft tube (91), the upper end of the inner pipe (941) extends into the upper gear box (93), an oil return channel (942) is formed between the inner pipe (941) and the shaft tube (91), a clamping plate (943) is arranged at the outer wall of the inner pipe (941), the clamping plate (943) is clamped between the upper gear box (93) and the shaft tube (91), a plurality of oil holes (9991) are distributed in an annular manner on the plate surface of the clamping plate (943), the transmission shaft (94) passes through the inner pipe (941), a spiral sheet (944) is fixed to the outside of the transmission shaft (94), the upper and lower ends of the spiral sheet (944) both extend to the outside of the inner pipe (941), and the liquid level of the lubricating oil reaches the inner pipe (941).

7. The rotary tiller with adjustable tillage depth and angle according to claim 6, characterized in that: The surface of the second driven bevel gear (915) is provided with a first oil hole (9151) distributed in an annular shape, an oil injection cap (9441) is threadedly connected to the upper end of the inner pipe (941), the transmission shaft (94) passes through the oil injection cap (9441), the transmission shaft (94) and the oil injection cap (9441) are clearance-matched, a plurality of conical oil injection holes (9442) are distributed in an annular shape on the surface of the oil injection cap (9441), the diameter of the oil injection hole (9442) gradually decreases upward, and the oil injection hole (9442) corresponds to the second driven bevel gear (915).

8. The rotary tiller with adjustable tillage depth and angle according to claim 7, characterized in that: A conical oil separation surface (9152) is processed on the upper end of the second driven bevel gear (915), and fins (9153) are distributed in an annular manner on the oil separation surface (9152).

9. The rotary tiller with adjustable tillage depth and angle according to claim 6, characterized in that: The upper edge of the inner pipe (941) reaches the position of the sixth bearing (917).

10. The rotary tiller with adjustable tillage depth and angle according to claim 1, characterized in that: The auxiliary support device (10) comprises a first hydraulic push rod (101), a passive telescopic rod (102), a mounting plate (103), a wheel axle (105) and a support wheel (104); the first hydraulic push rod (101) and the passive telescopic rod (102) are both fixed to the bottom of the frame (1); the mounting plate (103) is fixedly mounted between the first hydraulic push rod (101) and the passive telescopic rod (102); a bearing seat is fixedly mounted at the bottom of the mounting plate (103); the wheel axle (105) is rotatably mounted via the bearing seat; a seventh bearing is matched between the wheel axle (105) and the bearing seat; and two support wheels (104) are provided, which are respectively fixed to the two ends of the wheel axle.

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