Limiting pad device for lifting stroke of seeding machine hydraulic cylinder

Abstract

The utility model relates to no -tillage precision fertilization seeding machine hydraulic control system technical field, concretely is the limiting pad device of seeding machine hydraulic cylinder lift stroke, including bolt, oil cylinder pad fixed frame weld, cylinder seat adjustment limiting pad, oil cylinder and cylinder seat adjusting plate, be provided with main support and wheel support on seeding machine, one end of main support is connected with traction equipment, one end of wheel support is rotatably connected with main support, and wheel support middle part is hinged with the piston rod of oil cylinder, oil cylinder drive wheel support rotates relative to main support, cylinder seat adjusting plate sets up in the lower part of oil cylinder piston rod, a plurality of cylinder seat adjustment limiting pads are placed on cylinder seat adjusting plate and are superposed, the utility model adopts the structure that cylinder seat adjusting plate and multilayer cylinder seat adjustment limiting pad combine, adjusts oil cylinder piston rod stroke through increasing and reducing cylinder seat adjustment limiting pad number, can solve the depth adaptation problem of original seeding machine in different land operation and for different crops sowing time, satisfies the diversification sowing demand.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic control system for no-till precision fertilization seeders, specifically to a limiting pad device for the lifting stroke of the hydraulic cylinder of the seeder. Background Technology

[0002] In my country, no-till precision fertilization seeding has been widely used in agricultural production. Hydraulic cylinders, as the actuators of seeders, primarily function to control the extension and retraction of the piston rod, thereby raising and lowering the working parts of the seeder and adjusting the seeding depth to meet the different growth requirements of various crops. They can also lift the seeding components during transport to prevent collisions with ground obstacles. Traditionally, the stroke of hydraulic cylinders is limited by welded blocks or bolt adjustments. Once the welded stop-type limiting device is welded, its limiting position is fixed and cannot be adjusted according to the different requirements of different crops for sowing depth and the soil conditions of different plots, resulting in poor adaptability of the seeder.

[0003] On the other hand, while bolt-adjustable limit devices offer some degree of adjustability, the adjustment process is cumbersome, requiring operators to repeatedly disassemble and adjust the bolt positions using specialized tools. Furthermore, during long-term operation of the seeder, the bolts are prone to loosening due to machine vibration and soil impact, causing the limit position to shift. This not only leads to unstable sowing depth but may also cause excessive extension and retraction of the hydraulic cylinder piston rod, damaging the internal seals of the cylinder.

[0004] In summary, the traditional hydraulic cylinder stroke limit method for seeders has problems such as difficulty in adjustment and poor versatility. Therefore, it is necessary to develop a new type of hydraulic cylinder stroke limit device that can meet the planting depth requirements of different crops. Utility Model Content

[0005] The purpose of this utility model is to provide a limiting pad device for the lifting stroke of the hydraulic cylinder of a seeder, so as to overcome the problems of difficulty in adjustment and poor versatility of the existing hydraulic cylinder stroke limiting device for no-till precision fertilization seeders.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a limiting pad device for the lifting stroke of a hydraulic cylinder of a seeder, comprising bolts, a welded cylinder pad fixing frame, a cylinder seat adjusting limiting pad, a cylinder, and a cylinder seat adjusting plate; The seeder is equipped with a main frame and a wheel frame; one end of the main frame is connected to the traction device, one end of the wheel frame is rotatably connected to the main frame, and the middle of the wheel frame is hinged to the piston rod of the hydraulic cylinder; the hydraulic cylinder drives the wheel frame to rotate relative to the main frame. The cylinder seat adjustment plate is located at the lower part of the cylinder piston rod; a plurality of cylinder seat adjustment limiting pads are stacked on the cylinder seat adjustment plate; The bolts and cylinder gasket fixing bracket are welded together and pass through the cylinder seat adjustment limit pad and cylinder seat adjustment plate from top to bottom; this is used to limit the rotation position of the cylinder seat adjustment limit pad.

[0007] Furthermore, the cylinder seat adjustment plate has a central insertion hole, a first insertion hole, and a second insertion hole on its surface; bolts are inserted into the central insertion hole; and the cylinder gasket fixing bracket is welded and inserted into the first insertion hole and the second insertion hole.

[0008] Furthermore, the cylinder seat adjustment limiting pad has a thickness of 5mm and has a central rotating hole, a first limiting hole, and a tail limiting hole on its surface. The central rotating hole is located at the center of the pad, and the first limiting hole and the tail limiting hole are distributed on both sides of the central rotating hole. The cylinder seat adjustment limiting pad is stacked on the cylinder seat adjustment plate with the bolt as the central rotating axis, and the central rotating hole is aligned with the central insertion hole of the cylinder seat adjustment plate. One end of the cylinder seat adjustment limiting pad has a hook-shaped structure, which can fit against the outside of the cylinder piston rod.

[0009] Furthermore, the cylinder gasket fixing bracket welding includes a first fixing pin, a second fixing pin, and a fixing bracket seat plate; the first fixing pin and the second fixing pin are arranged in parallel and the upper part is fixedly connected to the fixing bracket seat plate, and the fixing bracket seat plate is a rectangular steel plate.

[0010] Furthermore, pin holes are provided at the bottom of the first and second fixing pins.

[0011] Furthermore, it also includes a cylinder gasket spring and a nut; the cylinder gasket spring is fitted onto the bolt and is located between the uppermost cylinder seat adjusting limit pad and the bolt nut; The bottom of the bolt passes through the cylinder seat adjustment limit pad and the cylinder seat adjustment plate before being threaded into the nut.

[0012] Furthermore, it also includes a cylinder guard; the cylinder guard is a cylindrical cover, which is fixed above the topmost cylinder seat adjustment limit pad, and can rotate with the topmost cylinder seat adjustment limit pad and be fastened to the outside of the cylinder piston rod.

[0013] Beneficial effects This utility model adopts a structure combining a cylinder seat adjustment plate and a multi-layer cylinder seat adjustment limit pad. The stroke of the hydraulic cylinder piston rod can be adjusted by increasing or decreasing the number of cylinder seat adjustment limit pads. This can solve the problem of depth adaptation of the original seeder when operating in different plots and for sowing different crops, and meet diverse sowing needs. This invention designs a rotatable cylinder seat adjustment limit pad and a quick-locking mechanism for the cylinder gasket compression spring. A single person can complete the assembly and disassembly of the pad without complicated tools, simplifying the adjustment process and improving the efficiency of work preparation and adjustment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the sowing operation state structure of the limiting pad device disclosed in this utility model; Figure 2 This is a schematic diagram of the transport state structure of the limiting pad device disclosed in this utility model; Figure 3 This is a schematic diagram of the connection structure between the main support and the wheel support of the limiting pad device disclosed in this utility model; Figure 4 yes Figure 3 A partial view; Figure 5 This is an exploded view of the limiting pad device disclosed in this utility model; Figure 6 yes Figure 5 The exploded diagram.

[0016] In the picture: 1. Bolt; 2. Cylinder gasket fixing bracket welding; 201. First fixing pin; 202. Second fixing pin; 203. Fixing bracket base plate; 3. Cylinder gasket compression spring; 4. Cylinder cover; 5. Cylinder seat adjusting limit pad; 501. First limiting hole; 502. Center rotation hole; 503. Tail limiting hole; 6. Cylinder; 7. Nut; 8. R-pin; 9. Cylinder seat adjusting plate; 901. First insertion hole; 902. Second insertion hole; 903. Center insertion hole; 10. Main body bracket; 11. Wheel bracket. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] To achieve the above objectives, this utility model provides the following technical solution, such as... Figure 1-6 As shown, the limiting pad device for the lifting stroke of the hydraulic cylinder of the seeder includes bolt 1, cylinder pad fixing bracket welding 2, cylinder seat adjustment limiting pad 5, cylinder 6 and cylinder seat adjustment plate 9; The seeder is equipped with a main support frame 10 and a wheel support frame 11. One end of the main support frame 10 is connected to the traction equipment, and one end of the wheel support frame 11 is rotatably connected to the main support frame 10. The middle part of the wheel support frame 11 is hinged to the piston rod of the hydraulic cylinder 6. The main support frame 10, the wheel support frame 11, and the hydraulic cylinder 6 work together to support the overall components of the device and realize the connection between the seeder and the traction equipment, as well as the lifting and lowering support of the seeder. The hydraulic cylinder 6 is a hydraulic cylinder including a cylinder body, a piston rod, seals, and oil inlet and outlet ports. The piston rod has a hinge hole at its end. The cylinder body of the hydraulic cylinder 6 is fixed to the main support frame 10 with bolts. The lower end of the piston rod is hinged to the middle part of the wheel support frame 11 through a hinge shaft. The oil inlet and outlet ports are connected to the hydraulic system pipeline of the seeder. The hydraulic cylinder 6 is used to provide the power required for the lifting and lowering of the seeder, driving the wheel support frame 11 to rotate relative to the main support frame 10. The cylinder seat adjustment plate 9 is located at the lower part of the piston rod of the oil cylinder 6; several cylinder seat adjustment limit pads 5 are stacked on the cylinder seat adjustment plate 9. Bolt 1 and cylinder gasket fixing bracket welding 2 pass through cylinder seat adjusting limit pad 5 and cylinder seat adjusting plate 9 from top to bottom; used to limit the rotation position of cylinder seat adjusting limit pad 5 to prevent deviation during operation; the lifting stroke of cylinder 6 piston rod is controlled by setting the number of cylinder seat adjusting limit pads 5.

[0019] During sowing, the piston rod of the hydraulic cylinder 6 shortens, causing the wheel bracket 11 to rotate around the hinge axis with the main support 10, thus lowering the sowing equipment. The cylinder seat adjustment limit pad 5 prevents the piston rod from shortening further. The number of cylinder seat adjustment limit pads 5 is increased or decreased according to the looseness of the soil to stabilize the sowing depth. During transportation, the piston rod of the hydraulic cylinder 6 extends to its longest length, causing the wheel bracket 11 to rotate in the opposite direction, thus raising the sowing equipment. Power transmission is blocked to avoid missed sowing or fertilizer during transportation.

[0020] Furthermore, the cylinder seat adjustment plate 9 has a central insertion hole 903, a first insertion hole 901, and a second insertion hole 902 on its surface. The cylinder seat adjustment plate 9 is fixed on the lower end of the piston rod of the oil cylinder 6. The cylinder seat adjustment plate 9 serves as the mounting base for the cylinder seat adjustment limiting pad 5. The position of the cylinder seat adjustment limiting pad 5 is limited by the insertion holes, the oil cylinder pad fixing bracket welding 2, and the bolts 1. The cylinder seat adjustment limiting pad 5 is used to control the stroke of the piston rod of the oil cylinder 6 by increasing or decreasing its quantity, so as to adapt to different sowing depth requirements.

[0021] Furthermore, the cylinder seat adjustment limiting pad 5 is a metal pad structure with a thickness of 5mm. The surface is provided with a central rotation hole 502, a first limiting hole 501 and a tail limiting hole 503. The central rotation hole 502 is located at the center of the pad, and the first limiting hole 501 and the tail limiting hole 503 are distributed on both sides of the central rotation hole 502. The cylinder seat adjustment limiting pad 5 is stacked on the cylinder seat adjustment plate 9 with the bolt 1 as the central rotation axis. The central rotation hole 502 is aligned with the central insertion hole 903 of the cylinder seat adjustment plate 9. One end of the cylinder seat adjustment limiting pad 5 has a hook-shaped structure, which can fit against the outside of the piston rod of the oil cylinder 6.

[0022] Furthermore, the cylinder gasket fixing bracket welding 2 is a U-shaped structure formed by welding the first fixing pin 201, the second fixing pin 202 and the fixing bracket seat plate 203. The first fixing pin 201 and the second fixing pin 202 are both smooth cylindrical round steel, arranged in parallel and fixedly connected to the fixing bracket seat plate 203 at the top. The fixing bracket seat plate 203 is a rectangular steel plate. When the cylinder seat adjustment limit pad 5 is in the working position close to the oil cylinder 6, the first fixing pin 201 of the oil cylinder pad fixing bracket welding 2 can be inserted into the first limiting hole 501 of the cylinder seat adjustment limit pad 5 and the first insertion hole 901 of the cylinder seat adjustment plate 9 close to the oil cylinder 6 in sequence, and the second fixing pin 202 is inserted into the second insertion hole 902 of the cylinder seat adjustment plate 9 at the same time. When the cylinder seat adjustment limit pad 5 is in a position away from the oil cylinder 6, the second fixing pin 202 of the oil cylinder pad fixing bracket welding 2 is inserted into the tail limit hole 503 of the cylinder seat adjustment limit pad 5.

[0023] Furthermore, the bottom of the first fixed pin 201 and the second fixed pin 202 are provided with pin holes; the R-type pin 8 is inserted into the pin holes at the bottom of the first fixed pin 201 and the second fixed pin 202 to limit the cylinder gasket fixing bracket weld 2 on the cylinder seat adjusting plate 9; R-pin 8 is used to quickly fix or remove cylinder gasket fixing bracket welding 2, and facilitates adjustment of the cylinder seat adjustment limit pad 5 quantity or position, which can be operated by a single person. Furthermore, it also includes a cylinder gasket spring 3; the cylinder gasket spring 3 is fitted onto the bolt 1 and is located between the uppermost cylinder seat adjusting limit pad 5 and the nut of the bolt 1. The bottom of bolt 1 passes through cylinder seat adjustment limit pad 5 and cylinder seat adjustment plate 9 and is threadedly connected to nut 7; bolt 1 and nut 7 cooperate to pass through and fix cylinder seat adjustment limit pad 5, cylinder gasket spring 3 and cylinder seat adjustment plate 9, while bolt 1 provides a rotation axis for cylinder seat adjustment limit pad 5; cylinder gasket spring 3 is used to provide continuous downward pressure so that cylinder seat adjustment limit pad 5 fits tightly against cylinder seat adjustment plate 9, and avoids displacement of cylinder seat adjustment limit pad 5 due to vibration.

[0024] Furthermore, it also includes a cylinder guard 4; the cylinder guard 4 is a cylindrical cover with an inner diameter slightly larger than the outer diameter of the piston rod of the cylinder 6; the cylinder guard 4 is fixed above the top cylinder seat adjustment limit pad 5, and can rotate with the cylinder seat adjustment limit pad 5 and be fastened to the outside of the piston rod of the cylinder 6.

[0025] The cylinder guard 4 is used to prevent foreign objects from adhering to the piston rod of the cylinder 6 or entering the interior of the cylinder 6.

[0026] The working principle and process are as follows: The limiting pad device for the lifting stroke of the hydraulic cylinder of the seeder described in this invention has two main working modes: the sowing operation state and the transportation state. By adjusting the cylinder seat, the number and position of the limiting pad (5) are adjusted to control the piston rod stroke of the cylinder (6), thereby adjusting the lifting height and sowing depth of the seeder. When the seeder is in transport mode, such as Figure 2 As shown, to avoid missed sowing or fertilizer during transportation, the piston rod of the hydraulic cylinder (6) is extended to its maximum length, driving the wheel bracket (11) to rotate and lifting the sowing device. At this time, all cylinder seat adjustment limit pads (5) are in the position of Figure 2 The location.

[0027] When the seeder enters the field to prepare for sowing, it is necessary to determine the required sowing depth based on the variety of the crop being planted and the soil texture, and then calculate the number of cylinder seat adjustment limit pads (5) required.

[0028] When adjusting the cylinder seat adjusting limit shim (5), first loosen the nut (7) from the bolt (1), then pull out the R-pin (8), remove the cylinder gasket fixing bracket welding (2), and rotate the lower cylinder seat adjusting limit shim (5) to the calculated position. Figure 1 The position of the upper cylinder seat adjustment limit pad (5) remains in place; After adjustment, align the first fixing pin (201) of the cylinder gasket fixing bracket welding (2) with the first insertion hole (901) of the cylinder seat adjustment plate (9) and insert it into the insertion hole. At this time, the first limiting hole (501) of the cylinder seat adjustment limiting pad (5) corresponds to the first fixing pin (201), and the limiting pad is limited to the working position close to the cylinder (6) and cannot rotate freely.

[0029] Next, insert the R-type pin (8) into the pin hole at the bottom of the first fixed pin shaft (201) to lock the cylinder gasket fixing bracket welding (2). Finally, tighten the nut (7) to generate appropriate compression of the cylinder gasket compression spring (3) to ensure that the cylinder seat adjustment limit pads (5) fit tightly.

[0030] After completing the above adjustments, start the hydraulic system of the seeder and push the piston and piston rod of the oil cylinder (6) to retract inward. During the retraction of the piston rod, the wheel bracket (11) hinged to it rotates around the hinge axis with the main support (10), and the wheel bracket (11) drives the traveling wheels and the seeder to descend together. When the seeder descends to the set seeding depth, the end of the oil cylinder (6) contacts the upper surface of the cylinder seat adjustment limit pad (5), restricting the piston rod from continuing to retract. At this time, the seeder maintains this height for seeding operations, thereby ensuring the consistency of the seeding depth. During the seeding operation, the oil cylinder pad compression spring (3) continuously provides downward pressure, so that the cylinder seat adjustment limit pad (5) and the cylinder seat adjustment plate (9) fit tightly together, avoiding the limit pad from loosening or displacement due to vibration, and ensuring the limit accuracy.

[0031] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A limiting pad device for the lifting stroke of a hydraulic cylinder in a seeder, characterized in that, Includes bolts (1), cylinder gasket fixing bracket welding (2), cylinder seat adjustment limit pad (5), cylinder (6) and cylinder seat adjustment plate (9); The seeder is equipped with a main support (10) and a wheel support (11); one end of the main support (10) is connected to the traction device, one end of the wheel support (11) is rotatably connected to the main support (10), and the middle part of the wheel support (11) is hinged to the piston rod of the oil cylinder (6); the oil cylinder (6) drives the wheel support (11) to rotate relative to the main support (10); The cylinder seat adjustment plate (9) is located at the lower part of the piston rod of the oil cylinder (6); a number of cylinder seat adjustment limit pads (5) are stacked on the cylinder seat adjustment plate (9). The bolt (1) and the cylinder gasket fixing bracket are welded together (2) and pass through the cylinder seat adjustment limit pad (5) and the cylinder seat adjustment plate (9) from top to bottom; used to limit the rotation position of the cylinder seat adjustment limit pad (5).

2. The limiting pad device for the lifting stroke of the hydraulic cylinder of the seeder according to claim 1, characterized in that, The cylinder seat adjustment plate (9) has a central insertion hole (903), a first insertion hole (901) and a second insertion hole (902) on its surface; a bolt (1) is inserted into the central insertion hole (903); and a cylinder gasket fixing bracket welding (2) is inserted into the first insertion hole (901) and the second insertion hole (902).

3. The limiting pad device for the lifting stroke of the hydraulic cylinder of the seeder according to claim 2, characterized in that, The cylinder seat adjustment limiting pad (5) is 5mm thick and has a central rotating hole (502), a first limiting hole (501) and a tail limiting hole (503) on its surface. The central rotating hole (502) is located at the center of the pad, and the first limiting hole (501) and the tail limiting hole (503) are distributed on both sides of the central rotating hole (502). The cylinder seat adjustment limiting pad (5) is stacked on the cylinder seat adjustment plate (9) with the bolt (1) as the central rotating axis. The central rotating hole (502) is aligned with the central insertion hole (903) of the cylinder seat adjustment plate (9). One end of the cylinder seat adjustment limiting pad (5) has a hook-shaped structure, which is attached to the outside of the piston rod of the oil cylinder (6).

4. The limiting pad device for the lifting stroke of the hydraulic cylinder of the seeder according to claim 3, characterized in that, The cylinder gasket fixing bracket welding (2) includes a first fixing pin (201), a second fixing pin (202) and a fixing bracket seat plate (203); the first fixing pin (201) and the second fixing pin (202) are arranged in parallel and the upper part is fixedly connected to the fixing bracket seat plate (203), and the fixing bracket seat plate (203) is a rectangular steel plate.

5. The limiting pad device for the lifting stroke of the hydraulic cylinder of the seeder according to claim 4, characterized in that, The bottom of the first fixed pin (201) and the second fixed pin (202) are provided with pin holes.

6. The limiting pad device for the lifting stroke of the hydraulic cylinder of the seeder according to claim 1, characterized in that, It also includes a cylinder cushion spring (3) and a nut (7); the cylinder cushion spring (3) is fitted on the bolt (1) and is located between the uppermost cylinder seat adjustment limit pad (5) and the nut of the bolt (1); The bottom of the bolt (1) passes through the cylinder seat adjustment limit pad (5) and the cylinder seat adjustment plate (9) and is threaded to the nut (7).

7. The limiting pad device for the lifting stroke of the hydraulic cylinder of the seeder according to claim 1, characterized in that, It also includes a cylinder cover (4); the cylinder cover (4) is a cylindrical cover, and the cylinder cover (4) is fixed above the top cylinder seat adjustment limit pad (5), and can rotate with the top cylinder seat adjustment limit pad (5) and be fastened to the outside of the piston rod of the cylinder (6).

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