A lifting structure of a rotary seeding and fertilizing machine

Abstract

The present application relates to the technical field of agricultural equipment, and discloses a lifting structure of a rotary seeding and fertilizing machine, including a front frame, a front gearbox and a rear frame, wherein the rear frame is provided with a rear gearbox, which is transmission-connected to a rear universal joint, and the front gearbox has multiple sets of output shafts, wherein one set of output shafts is connected to the rear universal joint through a clutch structure, and the front frame is hinged to the rear frame through a hinge plate, and the hinge plate is located at the bottom of the front frame, and a telescopic rod is provided between the rear frame and the front frame, and the telescopic rod is telescopically driven to rotate the rear frame, and the clutch structure disconnects the transmission connection after the lifting exceeds a specific angle. The lifting structure of the rotary seeding and fertilizing machine has a large lifting stroke, and the entire device can realize multiple state switching under the action of the lifting structure. At the same time, when the lifting exceeds a specific angle, the power connection is automatically cut off, and the power is no longer transmitted through the rear universal joint to avoid jamming due to excessive angles.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural equipment, and in particular to a lifting structure of a rotary seeding and fertilizing machine. Background Art

[0002] The rotary seeding and fertilization machine is mainly composed of a frame, a transmission system, a rotary tillage roller, a furrow opener, a seed meter, a pressing wheel, a seed and fertilizer box, and a soil covering component.

[0003] The existing rotary seeding and fertilizing machine has only one frame, and the rotary tillage roller, furrow opener, pressing wheel, and soil covering assembly are connected to the frame through a cantilever, which can adapt to the bumpy field during tillage. However, due to the relatively small adjustment stroke, the parts that are not needed for work cannot be folded up separately when only rotary tillage is performed, which is not flexible enough. Summary of the invention

[0004] The present application proposes a lifting structure for a rotary seeding and fertilizing machine with a large lifting stroke. Under the action of the lifting structure, the entire equipment can achieve multiple state switching. At the same time, after the lifting exceeds a specific angle, the power connection is automatically cut off, and the power is no longer transmitted through the rear universal joint, avoiding jamming due to excessive angles.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a lifting structure of a rotary seeding and fertilizing machine, including a front frame, an input box is provided on the front frame, the input box is connected to the output shaft of the traction equipment, a front gear box is provided on the side of the front frame, the front gear box is transmission connected to the input box through a front universal joint, the input box is located in the middle of the front frame, the front universal joint is horizontally arranged, and also includes a rear frame, a rear gear box is provided on the rear frame, the rear gear box is transmission connected to the rear universal joint, the front gear box has multiple groups of output shafts, one group of output shafts is connected to the rear universal joint through a clutch structure, the front frame is hinged to the rear frame through a hinge plate, the hinge plate is located at the bottom of the front frame, a telescopic rod is provided between the rear frame and the front frame, the telescopic rod is telescopic to drive the rear frame to rotate, and the clutch structure disconnects the transmission connection after the lifting exceeds a specific angle.

[0006] Furthermore, the rear universal joint includes a cylinder and an inner rod, the end of the inner rod is fixedly connected to a piston, the side wall of the inner rod is connected to the inner wall of the cylinder by spline matching, the cylinder is filled with hydraulic oil, the cylinder is connected to the output shaft of the front gear box through a connecting shaft, the clutch structure includes an outer transmission cylinder and an inner transmission cylinder, the outer transmission cylinder and the inner transmission cylinder are respectively fixedly connected to the output shaft and the connecting shaft of the front gear box, an ejection block capable of radial movement is provided on the side wall of the inner transmission cylinder, the inner transmission cylinder is provided with a receiving groove corresponding to the ejection block, and the ejection block and the inner transmission cylinder are connected. An elastic structure is provided in the middle to enable the ejection block to retract. When the ejection block is ejected, the outer transmission cylinder and the inner transmission cylinder rotate synchronously. When the ejection block retracts, the transmission is disconnected. A driving block driven by hydraulic pressure is provided in the inner transmission cylinder. The driving block has an inclined surface corresponding to the ejection block. Initially, the driving block puts the ejection block in an ejection state. When the hydraulic pressure applied to the driving block changes, the ejection block retracts and the transmission between the front gear box and the rear universal joint is disconnected. The oil cylinder applies hydraulic pressure to the driving block through the connecting pipe. When the inner rod moves a specific amount, the hydraulic pressure causes the driving block to move.

[0007] Furthermore, the outer transmission cylinder is fixedly connected to the connecting shaft, the inner transmission cylinder is fixedly connected to the output shaft of the front gear box, an ejector rod is provided at the end of the connecting shaft, the connecting shaft is connected to the oil cylinder through a connecting pipe, the driving block is connected to the ejector rod through the connecting rod, the hydraulic pressure is transmitted to the driving block through the ejector rod and the connecting rod, an elastic body is provided between the driving block and the output shaft of the front gear box, the elastic body pushes the driving block toward the ejector block, so that the ejector block is ejected.

[0008] Furthermore, the outer transmission cylinder is fixedly connected to the output shaft of the front gear box, the inner transmission cylinder is fixedly connected to the connecting shaft, a driving chamber is provided in the inner transmission cylinder, a plunger is provided in the driving chamber, the plunger is fixedly connected to the ejection block, when the pressure in the connecting shaft increases, the plunger moves toward the axis, an elastic body is provided in the middle of the driving chamber, when not under pressure, the ejection block is in an exposed state, the middle of the driving chamber is connected to the atmosphere, and a hydraulic oil channel is provided in the middle of the driving chamber.

[0009] Furthermore, an overflow tube is sleeved on the outer wall of the oil cylinder, and the overflow tube is connected with the oil cylinder through an overflow hole. When the rear frame rotates to a specific angle, the piston of the inner rod passes over the overflow hole.

[0010] Furthermore, the overflow hole and the oil cylinder are filled with hydraulic oil, the inner wall of the overflow cylinder is connected with an elastic bag, and the maximum elastic force of the elastic bag after contraction is smaller than the elastic force between the driving block and the elastic body.

[0011] Furthermore, the connecting pipes are provided with two groups, and the two groups of connecting pipes are respectively provided with a one-way valve and a control valve, and the control valve is opened only when the output shaft of the front gear box stops rotating.

[0012] Furthermore, the connecting pipe is output from the bottom center of the oil cylinder, bypasses the cross and is connected to the bottom center of the connecting shaft. The one-way valve and the control valve are fixed on the cross shaft, and the connecting pipe is a hose.

[0013] Beneficial effects of the present invention:

[0014] The present application provides a lifting structure for a rotary seeding and fertilizing machine with a large lifting stroke. Under the action of the lifting structure, the entire device can achieve multiple state switching, for example, it can perform rotary tillage, pressing and sowing at the same time, or it can perform rotary tillage only after lifting.

[0015] When the lift exceeds a certain angle, the power connection is automatically cut off and the power is no longer transmitted through the rear universal joint to avoid jamming due to excessive angles. At the same time, when the angle exceeds a certain angle, it needs to be restarted to avoid excessive impact force and damage to the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the specification, illustrate the embodiments disclosed in the present application and, together with the description, serve to explain the principles of the embodiments disclosed in the present application.

[0017] The embodiments disclosed in the present application may be more clearly understood according to the following detailed description with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0019] Figure 2 It is a schematic diagram of the rear universal joint in the first embodiment of the invention;

[0020] Figure 3 It is a cross-sectional view of the rear universal joint in the first embodiment of the invention;

[0021] Figure 4 It is a cross-sectional view of the clutch structure in the first embodiment of the invention;

[0022] Figure 5 It is a cross-sectional view of the clutch structure in the second embodiment of the invention.

[0023] In the figure: 1, front frame; 2, rear frame; 3, hinged plate; 4, input box; 5, front gear box; 6, telescopic rod; 7, front universal joint; 8, rear universal joint; 81, oil cylinder; 82, inner rod; 83, connecting shaft; 84, connecting pipe; 85, one-way valve; 86, control valve; 87, overflow cylinder; 88, overflow hole; 89, ejector rod; 9, rear gear box; 10, clutch structure; 101, outer transmission cylinder; 102, inner transmission cylinder; 103, ejector block; 104, drive block; 105, accommodating groove; 106, connecting rod; 107, drive chamber; 108, plunger. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Embodiment 1

[0025] See also Figure 1 A lifting structure of a rotary seeding and fertilizing machine includes a front frame 1, an input box 4 is provided on the front frame 1, the input box 4 is connected to the output shaft of the traction device, a rotary tillage roller is installed on the front frame 1, a front gear box 5 is provided on the side of the front frame 1, the front gear box 5 is connected to the input box 4 through a front universal joint 7, the input box 4 is located in the middle of the front frame 1, the front universal joint 7 is arranged horizontally, the front gear box 5 has multiple groups of output shafts, one group of output shafts of the front gear box 5 is connected to the rotary cutter roller, and another group of output shafts is connected to the rear universal joint 8 through a clutch structure 10, a rear gear box 9 is provided on the rear frame 2, the rear gear box 9 is connected to the rear universal joint 8, and the rear universal joint 8 is longitudinally connected. The rear universal joint 8 and the rear gearbox 9 are arranged on one side of the rear frame 2. The rear gearbox 9 has a plurality of output shafts, which are connected to each functional component in a transmission manner. At least two output shafts are connected to the furrow opener and the pressing wheel in a transmission manner respectively. The front frame 1 is also provided with a corresponding connecting plate, which is connected to the traction device through a connecting rod and a hydraulic cylinder. The front frame 1 is hinged to the rear frame 2 through a hinge plate 3, which is located at the bottom of the front frame 1. The hinge plate 3 is connected to the bottom of the rear frame 2 through a pin. A telescopic rod 6 is arranged between the rear frame 2 and the front frame 1. The telescopic rod 6 is telescopically driven to rotate the rear frame 2, and the functional components such as the furrow opener, the pressing wheel, and the soil covering component installed on the rear frame 2 are lifted. When the rear frame 2 rotates, the functional components installed on the rear frame 2, such as the furrow opener, the pressing wheel, and the soil covering component, will wait for a large lift, completely leave the ground, and will not participate in the work. The clutch structure 10 disconnects the transmission connection after lifting.

[0026] The rear universal joint 8 is a cross universal joint. Generally speaking, the maximum swing angle it can accept is between 30 and 35 degrees. Too large an angle will cause it to get stuck. When lifting, due to misoperation, natural lifting when crossing the field ridge obstacle, and equipment failure, the clutch structure 10 may not cut off the power in time, causing damage to the transmission system. For this reason, in this embodiment, please refer to Figure 2-Figure 4The rear universal joint 8 is connected to the front gear box 5 through the connecting shaft 83. The clutch structure 10 includes an outer transmission cylinder 101 and an inner transmission cylinder 102. The outer transmission cylinder 101 and the inner transmission cylinder 102 are fixedly connected to the output shaft of the front gear box 5 and the connecting shaft 83 respectively. In this embodiment, the outer transmission cylinder 101 is fixedly connected to the connecting shaft 83, and the inner transmission cylinder 102 is fixedly connected to the output shaft of the front gear box 5. The inner transmission cylinder 102 is inside the outer transmission cylinder 101. A radially movable ejector block 103 is provided on the side wall of the inner transmission cylinder 102. The inner transmission cylinder 102 is provided with a receiving groove 105 corresponding to the ejector block 103. The ejector block 103 and the inner transmission cylinder 102 are fixedly connected to each other. An elastic structure is provided between the moving cylinders 102 to retract the ejection block 103. The inner wall of the outer transmission cylinder 101 is provided with transmission teeth corresponding to the ejection block 103. When the ejection block 103 is ejected, the outer transmission cylinder 101 and the inner transmission cylinder 102 rotate synchronously. When the ejection block 103 retracts, the transmission is disconnected. A hydraulically driven driving block 104 is provided in the inner transmission cylinder 102. The driving block 104 has an inclined surface corresponding to the ejection block 103. Initially, the driving block 104 puts the ejection block 103 in an ejection state. When the hydraulic pressure applied to the driving block 104 changes, the ejection block 103 retracts to disconnect the transmission between the front gear box 5 and the rear universal joint 8.

[0027] The rear universal joint 8 includes a cylinder 81 and an inner rod 82, the end of the inner rod 82 is fixedly connected to a piston, the side wall of the inner rod 82 is connected to the inner wall of the cylinder 81 by a spline, and the spline is only provided at the opening of the cylinder 81. The cylinder 81 is filled with hydraulic oil, and the cylinder 81 applies hydraulic pressure to the drive block 104 through the connecting pipe 84 to move the drive block 104. In the first embodiment, when the rear frame 2 rotates, the inner rod 82 is retracted into the cylinder 81 to generate high pressure, and the high pressure drives the drive block 104 to move. In other embodiments, the process of the inner rod 82 retracting into the cylinder 81 can be suction, and the suction drives the drive block 104 to move.

[0028] An ejector rod 89 is provided at the end of the connecting shaft 83, and the connecting shaft 83 is connected to the oil cylinder 81 through a connecting pipe 84. When the inner rod 82 contracts, the ejector rod 89 is ejected, and the driving block 104 is connected to the ejector rod 89 through a connecting rod 106. An elastic body is provided between the driving block 104 and the output shaft of the front gear box 5, and the elastic body pushes the driving block 104 toward the ejector block 103, so that the ejector block 103 is ejected. When the ejector rod 89 is ejected, the driving block 104 is pushed back, and the ejector block 103 retracts. The connecting shaft 83 is connected to the cover plate through a bearing. When the cover plate is installed on the housing of the output shaft of the front gear box 5, the ejector rod 89 is close to the connecting rod 106.

[0029] An overflow tube 87 is sleeved on the outer wall of the oil cylinder 81, and the overflow tube 87 is connected to the oil cylinder 81 through an overflow hole 88. When the rear frame 2 rotates to a specific angle, the telescopic rod 6 contracts a specific amount, and the piston of the inner rod 82 passes over the overflow hole 88. When the angle becomes larger, the hydraulic pressure is transmitted to the clutch structure 10.

[0030] If the overflow cylinder 87 is not full, when the rear universal joint 8 rotates, the liquid is thrown into the overflow cylinder 87 under the action of centrifugal force, and the gas is mixed into the oil cylinder 81. During compression, the rear frame 2 does not reach the set angle, that is, the driving block 104 is driven to move, so that the power is cut off in advance, affecting normal use. For this reason, the overflow cylinder 87 and the oil cylinder 81 are filled with hydraulic oil, and the inner wall of the overflow cylinder 87 is connected to an elastic bag. The maximum elastic force of the elastic bag after contraction is less than the elastic force between the driving block 104 and the elastic body. Before the rear frame 2 rotates to a specific angle, the hydraulic oil in the oil cylinder 81 is squeezed into the overflow cylinder 87. This process overcomes the elastic force of the elastic bag. When the piston connected to the inner rod 82 passes over the overflow hole 88, it starts to drive the driving block 104 to move. In addition, since there is no gas in the oil cylinder 81 and the overflow cylinder 87, the liquid flow will not be affected when the rear universal joint 8 rotates.

[0031] After the power between the front gear box 5 and the rear universal joint 8 is cut off, when the rear frame 2 is lowered again, the rear universal joint 8 is loaded, and a large impact force will be generated at the moment when the clutch structure 10 is connected to the power. For this reason, two groups of connecting pipes 84 are provided, and the two groups of connecting pipes 84 are respectively provided with a one-way valve 85 and a control valve 86. When lifting, the hydraulic oil enters the clutch structure 10 from the one-way valve 85 to cut off the power. The control valve 86 is opened only when the output shaft of the front gear box 5 stops rotating. The output shaft of the front gear box 5 is provided with a corresponding speed measuring component. When the rear frame 2 is lowered, since the control valve 86 is not opened, the hydraulic oil cannot flow back, and the rear frame 2 cannot be lowered. Only when the front gear box 5 stops rotating can the rear frame 2 be lowered. After the rear frame 2 is lowered, the clutch structure 10 is connected to the power, and power transmission can be achieved at this time.

[0032] The connecting pipe 84 is output from the bottom center of the oil cylinder 81, bypasses the cross and is connected to the bottom center of the connecting shaft 83. The one-way valve 85 and the control valve 86 are fixed on the cross shaft. The connecting pipe 84 is a hose. The overall length of the connecting pipe 84 is short and the middle part is fixed by the cross shaft. When the rear universal joint 8 rotates, it is less affected by the centrifugal force. Embodiment 2

[0033] On the basis of the first embodiment, the difference between the second embodiment and the first embodiment is that the ejection block 103 is directly driven by hydraulic pressure to move, the outer transmission cylinder 101 is fixedly connected to the output shaft of the front gear box 5, the inner transmission cylinder 102 is fixedly connected to the connecting shaft 83, a driving chamber 107 is provided in the inner transmission cylinder 102, a plunger 108 is provided in the driving chamber 107, and the plunger 108 is fixedly connected to the ejection block 103. When the pressure in the connecting shaft 83 increases, the plunger 108 moves toward the axis, driving the ejection block 103 to contract. An elastic body is provided in the middle of the driving chamber 107. When not under pressure, the ejection block 103 is in an exposed state. The middle of the driving chamber 107 is connected to the atmosphere, which does not affect the movement of the plunger 108. A hydraulic oil channel is provided in the middle of the connecting shaft 83, and the connecting shaft 83 is connected to the cover plate through a bearing. After the cover plate is covered, the inner transmission cylinder 102 is inserted into the outer transmission cylinder 101.

Claims

1. A lifting structure of a rotary seeding and fertilizing machine, comprising a front frame (1), an input box (4) being provided on the front frame (1), the input box (4) being connected to an output shaft of a traction device, a front gear box (5) being provided on the side of the front frame (1), the front gear box (5) being transmission-connected to the input box (4) via a front universal joint (7), the input box (4) being located in the middle of the front frame (1), the front universal joint (7) being arranged transversely, and characterized in that: The machine also comprises a rear frame (2), a rear gear box (9) being provided on the rear frame (2), the rear gear box (9) being in driving connection with the rear universal joint (8), the front gear box (5) having a plurality of output shafts, one of which being connected to the rear universal joint (8) via a clutch structure (10), the front frame (1) being hingedly connected to the rear frame (2) via a hinge plate (3), the hinge plate (3) being located at the bottom of the front frame (1), a telescopic rod (6) being provided between the rear frame (2) and the front frame (1), the telescopic rod (6) being telescopic to drive the rear frame (2) to rotate, and the clutch structure (10) being disconnected from the driving connection after the rear frame (2) is lifted beyond a specific angle; The rear universal joint (8) comprises a cylinder (81) and an inner rod (82), the end of the inner rod (82) being fixedly connected to a piston, the side wall of the inner rod (82) being connected to the inner wall of the cylinder (81) by spline matching, the cylinder (81) being filled with hydraulic oil, the cylinder (81) being connected to the output shaft of the front gear box (5) by a connecting shaft (83), the clutch structure (10) comprising an outer transmission cylinder (101) and an inner transmission cylinder (102), the outer transmission cylinder (101) and the inner transmission cylinder (102) being fixedly connected to the output shaft of the front gear box (5) and the connecting shaft (83) respectively, the side wall of the inner transmission cylinder (102) being provided with an ejector block (103) capable of radial movement, the inner transmission cylinder (102) being provided with a receiving groove (105) corresponding to the ejector block (103), the ejector block (103) and the inner transmission cylinder (103) being connected to each other. 2) is provided with an elastic structure so that the ejection block (103) can be retracted. When the ejection block (103) is ejected, the outer transmission cylinder (101) and the inner transmission cylinder (102) rotate synchronously. When the ejection block (103) is retracted, the transmission is disconnected. A driving block (104) driven by hydraulic pressure is provided in the inner transmission cylinder (102). The driving block (104) has an inclined surface corresponding to the ejection block (103). Initially, the driving block (104) puts the ejection block (103) in an ejection state. When the hydraulic pressure applied to the driving block (104) changes, the ejection block (103) retracts, disconnecting the transmission between the front gear box (5) and the rear universal joint (8). The oil cylinder (81) applies hydraulic pressure to the driving block (104) through the connecting pipe (84). When the inner rod (82) moves a specific amount, the hydraulic pressure causes the driving block (104) to move. An overflow tube (87) is sleeved on the outer wall of the oil cylinder (81), and the overflow tube (87) is connected to the oil cylinder (81) through an overflow hole (88). When the rear frame (2) rotates to a specific angle, the piston of the inner rod (82) passes over the overflow hole (88), and the overflow tube (87) and the oil cylinder (81) are filled with hydraulic oil. An elastic bag is connected to the inner wall of the overflow tube (87). An elastic body is provided between the drive block (104) and the output shaft of the front gear box (5). The maximum elastic force of the elastic bag after contraction is smaller than the elastic force between the drive block (104) and the elastic body.

2. The lifting structure of the rotary seeding and fertilizing machine according to claim 1 is characterized in that: The outer transmission cylinder (101) is fixedly connected to the connecting shaft (83), the inner transmission cylinder (102) is fixedly connected to the output shaft of the front gear box (5), an ejector rod (89) is provided at the end of the connecting shaft (83), the connecting shaft (83) is connected to the oil cylinder (81) via a connecting pipe (84), the driving block (104) is connected to the ejector rod (89) via a connecting rod (106), hydraulic pressure is transmitted to the driving block (104) via the ejector rod (89) and the connecting rod (106), and the elastic member pushes the driving block (104) toward the ejector block (103), so that the ejector block (103) is ejected.

3. The lifting structure of the rotary seeding and fertilizing machine according to claim 2 is characterized in that: The connecting pipes (84) are provided in two groups, and the two groups of connecting pipes (84) are respectively provided with a one-way valve (85) and a control valve (86), and the control valve (86) is opened only when the output shaft of the front gear box (5) stops rotating.

4. The lifting structure of the rotary seeding and fertilizing machine according to claim 3 is characterized in that: The connecting pipe (84) is output from the bottom center of the oil cylinder (81), bypasses the cross and is connected to the bottom center of the connecting shaft (83). The one-way valve (85) and the control valve (86) are fixed on the cross shaft. The connecting pipe (84) is a hose.

Images