Seeding depth adjusting mechanism

Abstract

The utility model discloses a seeding depth adjusting mechanism which comprises a rack and a wheel carrier, a depth limiting wheel is mounted on the wheel carrier, a vertically arranged lifting oil cylinder and a vertically arranged guide sleeve are mounted on the rack, an ejector rod of the lifting oil cylinder is connected with the wheel carrier, a guide column matched with the guide sleeve is mounted on the wheel carrier, a plurality of locking holes are formed in the side part of the guide column, and the depth limiting wheel is mounted on the wheel carrier. A horizontally-arranged locking oil cylinder is installed on the machine frame, an oil inlet is formed in the front portion of the locking oil cylinder, a locking spring is installed at the rear end of the interior of the locking oil cylinder, and an ejector rod of the locking oil cylinder can be matched with the locking hole. Specifically, the number of the guide columns corresponding to one wheel carrier is two. During use, the lifting oil cylinder is used for controlling the lifting of the wheel carrier so as to control the seeding depth, when the lifting oil cylinder works, the ejector rod of the locking oil cylinder retreats to be separated from the locking hole, and when the lifting oil cylinder does not work, the ejector rod of the locking oil cylinder moves forwards to be matched with the locking hole so as to lock the guide pillar. The use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, and in particular to a sowing depth regulating mechanism. Background Art

[0002] Existing sowing depth adjustment mechanisms, such as Chinese Patent 2008200716492, disclose a sowing depth adjustment device for a seeder that can adjust the sowing depth and adjust it according to the terrain. The device is composed of an axle tube, two traveling wheels, a support rod, a toothed disc, a pressure spring, a lock bolt, and a handle. The axle tube is transversely perpendicular to the plowshare's beam and fixed to the plowshare's beam. A shaft is sleeved through the center of the axle tube. A support arm is fixed to one end of the shaft rod. The lower end of the support arm is laterally pivoted to a traveling wheel. The other end of the shaft rod is connected to the support rod. The cam is fixed together, and the lower end of the support rod is laterally pivoted with a traveling wheel. The length of the support rod between the shaft rod and the axis of the traveling wheel is equal to the length of the support arm. The gear plate is on the same side as the support rod, and the gear plate and the shaft tube are fixed together. The gear plate is located between the end face of the support rod and the shaft tube, and the center of the gear plate is concentric with the shaft rod. A locking bolt is provided on the support rod on the upper part of the gear plate, which is movable along the direction of the support rod. The lower end of the locking bolt can be clamped between two teeth of the gear plate by being pressed by a pressure spring. The relative angle between the support rod and the gear plate can be adjusted to make the traveling wheel rise or fall.

[0003] The above technical solution has the following disadvantages: its mechanism adopts manual adjustment, which is inconvenient to use. Utility Model Content

[0004] The purpose of the utility model is to provide a sowing depth adjustment mechanism for the above problems, which uses a lifting cylinder to control the lifting of a wheel frame and is easy to use.

[0005] To achieve the above-mentioned objectives, the utility model discloses a seeding depth adjustment mechanism, which includes a frame and a wheel frame. A depth-limiting wheel is mounted on the wheel frame. A vertically arranged lifting cylinder and a vertically arranged guide sleeve are mounted on the frame. The lift rod of the lifting cylinder is connected to the wheel frame. A guide post that cooperates with the guide sleeve is mounted on the wheel frame. The guide post has a plurality of locking holes on its side. A horizontally arranged locking cylinder is mounted on the frame. An oil inlet is formed at the front of the locking cylinder. A locking spring is mounted at the rear end of the locking cylinder. The lift rod of the locking cylinder can cooperate with the locking hole. Specifically, one wheel frame corresponds to two guide posts.

[0006] During use, the lifting cylinder controls the lifting of the wheel frame, thereby controlling the sowing depth. When the lifting cylinder is working, the top rod of the locking cylinder retreats and disengages from the locking hole. When the lifting cylinder is not working, the top rod of the locking cylinder moves forward and engages with the locking hole to lock the guide column. It is easy to use.

[0007] Preferably, the working oil ports A and B of the control valve are connected to the two ends of the lifting cylinder, and the working oil port C of the control valve is connected to the front end of the locking cylinder; when working, the oil inlet P of the control valve is connected to the working oil port B and the working oil port C, and the oil return port T of the control valve is connected to the working oil port A; or, the oil inlet P of the control valve is connected to the working oil port A and the working oil port C, and the oil return port T of the control valve is connected to the working oil port B; or, the oil inlet P, working oil port A and working oil port C of the control valve are closed, and the oil return port T of the control valve is connected to the working oil port C.

[0008] When the control valve's oil inlet P is connected to the working oil ports B and C, and the control valve's oil return port T is connected to the working oil port A, the locking cylinder's top rod retracts, the lifting cylinder's top rod extends, and the rack rises. When the control valve's oil inlet P is connected to the working oil ports A and C, and the control valve's oil return port T is connected to the working oil port B, the locking cylinder's top rod retracts, the lifting cylinder's top rod retracts, and the rack lowers. When the control valve's oil inlet P, working oil ports A and C are blocked, and the control valve's oil return port T is connected to the working oil port C, the locking cylinder's top rod extends, the lifting cylinder has no action, and the rack height remains unchanged.

[0009] Preferably, both left and right sides of the lower portion of the wheel frame are connected with V-shaped wheel legs, and the depth limiting wheel is installed at the lower end of the wheel legs.

[0010] When in use, the V-shaped wheel legs have a stable structure and strong supporting capacity.

[0011] Preferably, the cross-section of the wheel frame is arc-shaped, and the four corners of the wheel frame are connected to the upper ends of the wheel legs.

[0012] When in use, the arc-shaped wheel frame structure is stable and has strong supporting capacity.

[0013] Preferably, there are two guide posts, which are respectively located on the front and rear sides of the wheel frame.

[0014] When in use, the depth limiting wheel and the wheel frame move smoothly.

[0015] Preferably, a cylinder bellows is connected between the lower end of the lifting cylinder and the wheel frame.

[0016] When in use, avoid dust from affecting the operation of the lifting cylinder and reduce the failure rate.

[0017] Preferably, the upper end of the guide post is provided with a guide post limit block.

[0018] When in use, prevent the guide pin from coming off the guide sleeve.

[0019] Preferably, a lower guide sleeve bellows is connected between the lower end of the guide sleeve and the wheel frame, and an upper guide sleeve bellows is connected between the upper end of the guide sleeve and the guide column limit block.

[0020] When in use, avoid dust from affecting the operation of the guide sleeve and guide column, and reduce the failure rate.

[0021] Preferably, the depth limiting wheel includes a wheel hub and a tire, the wheel hub includes two spoke plates connected in a detachable manner, the edge of the spoke plate is connected to a groove bottom plate, the edge of the groove bottom plate is connected to a tire bead seat, the inner side of the groove bottom plate is provided with a fixing groove arranged along its circumference, and also includes a guard plate, the edge of the guard plate is connected to a spring sheet, the spring sheet is connected to a fixing protrusion that can cooperate with the fixing groove, the inner side of the guard plate is connected to a fixing bolt mounting plate, the fixing bolt mounting plate is threadedly connected to a fixing bolt that can resist the spring sheet, the guard plate is provided with an operating hole corresponding to the fixing bolt, and a plug is detachably installed in the operating hole.

[0022] During use, the fixing protrusion is located in the fixing slot, and the front end of the fixing bolt contacts the spring clip. At this point, the guard plate cannot be separated from the slot bottom plate. To remove the guard plate, first remove the plug, insert a screwdriver into the operating hole, and turn the fixing bolt. The fixing bolt will break contact with the spring clip. At this time, pull the guard plate, and the spring clip will deform under the external force, and the fixing protrusion will be separated from the fixing slot. The guard plates are located on both sides of the wheel hub to seal the internal space of the wheel hub, reducing the risk of soil, straw, and other debris entering the wheel hub during operation, thereby improving the safety of equipment operation.

[0023] Preferably, the edge of the guard plate is connected to an outer ring of the guard plate arranged along its circumference, and a plurality of pairs of slots are provided on the outer ring of the guard plate, and the spring piece is composed of the portion between each pair of slots.

[0024] When in use, the contact area between the outer ring of the guard plate and the bottom plate of the groove is large, which is beneficial to improving the stability of the guard plate and at the same time facilitates the processing of the shrapnel.

[0025] Preferably, the fixing bolt mounting plate is arranged along the circumference of the guard plate.

[0026] This structure facilitates the processing and manufacturing of the fixing bolt mounting plate, while improving the connection and disconnection strength of the guard plate.

[0027] Preferably, the fixing bolts are arranged obliquely.

[0028] When the guard plate needs to be removed, first remove the plug, insert the screwdriver into the operating hole and turn the fixing bolt. The fixing bolt is set at an angle for easy operation.

[0029] Preferably, the plug is made of rubber.

[0030] This structure makes it easy to install and remove the plug.

[0031] Preferably, the spoke plate is provided with an axle mounting hole, the guard plate is provided with an axle through hole, and a sealing ring is installed inside the axle through hole.

[0032] This structure makes it easy to install the axle.

[0033] Preferably, the two wheel spokes are connected via a bolt and nut structure.

[0034] This structure facilitates the connection of two spoke plates.

[0035] Preferably, a plurality of weight-reducing holes are provided on the spoke plate.

[0036] This structure is beneficial to reducing the weight of the spoke plate.

[0037] In summary, the beneficial effects of the present invention are as follows: when in use, the lifting cylinder controls the lifting of the wheel frame, thereby controlling the sowing depth; when the lifting cylinder is in operation, the top rod of the locking cylinder retreats and disengages from the locking hole; when the lifting cylinder is not in operation, the top rod of the locking cylinder moves forward and engages with the locking hole to lock the guide post, making it easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a structural diagram of a sowing depth adjustment mechanism of the utility model;

[0039] Figure 2 This is a structural diagram of a locking oil cylinder in a sowing depth adjustment mechanism of the utility model;

[0040] Figure 3 This is a structural diagram of the control oil circuit in a sowing depth adjustment mechanism of the utility model;

[0041] Figure 4 This is a structural diagram of a depth-limiting wheel in a sowing depth adjustment mechanism of the utility model;

[0042] Figure 5 This is a schematic diagram of the internal structure of a depth-limiting wheel in a sowing depth adjustment mechanism of the utility model;

[0043] Figure 6 This is a structural diagram of a hub in a sowing depth adjustment mechanism of the utility model;

[0044] Figure 7 This is a structural diagram of a guard plate in a sowing depth adjustment mechanism of the utility model;

[0045] Figure 8 yes Figure 4 Structural diagram of the middle section AA;

[0046] Figure 9 yes Figure 8 Schematic diagram of the enlarged structure of part B in the middle.

[0047] In the figure: 1. Tire;

[0048] 2. Hub; 201. Spoke plate; 202. Groove bottom plate; 203. Bead seat; 204. Axle mounting hole; 205. Spoke connection hole; 206. Weight reduction hole; 207. Bolt and nut structure;

[0049] 3. Guard plate; 4. Axle through hole; 5. Sealing ring; 6. Operation hole; 7. Plug; 8. Fixing groove; 9. Outer ring of guard plate; 10. Fixing bolt mounting plate; 11. Slot; 12. Shrapnel; 13. Fixing protrusion; 14. Fixing bolt hole; 15. Fixing bolt; 16. Frame; 17. Wheel frame; 18. Lifting cylinder; 19. Guide sleeve; 20. Guide column; 21. Locking cylinder; 22. Locking spring; 23. Locking hole; 24. Wheel support leg; 25. Cylinder bellows; 26. Lower guide sleeve bellows; 27. Upper guide sleeve bellows; 28. Guide column limit block. DETAILED DESCRIPTION

[0050] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0051] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0052] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0054] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0055] like Figures 1 to 3 As shown, a sowing depth adjustment mechanism includes a frame 16 and a wheel frame 17. A depth-limiting wheel is mounted on the wheel frame 17. A vertically arranged lifting cylinder 18 and a vertically arranged guide sleeve 19 are mounted on the frame 16. The top rod of the lifting cylinder 18 is connected to the wheel frame 17. A guide post 20 that cooperates with the guide sleeve 19 is mounted on the wheel frame 17. The guide post 20 has a plurality of locking holes 23 on its side. A horizontally arranged locking cylinder 21 is mounted on the frame 16. An oil inlet is formed at the front of the locking cylinder 21. A locking spring 22 is mounted at the rear end of the locking cylinder 21. The top rod of the locking cylinder 21 can cooperate with the locking hole 23. Specifically, there are two guide posts 20 corresponding to one wheel frame 17.

[0056] During use, the lifting cylinder 18 controls the lifting of the wheel frame 17, thereby controlling the sowing depth. When the lifting cylinder 18 is in operation, the top rod of the locking cylinder 21 moves back and disengages from the locking hole 23. When the lifting cylinder 18 is not in operation, the top rod of the locking cylinder 21 moves forward and engages with the locking hole 23, locking the guide post 20. It is easy to use.

[0057] Specifically, the control valve's operating oil ports A and B are connected to both ends of the lift cylinder 18, while the control valve's operating oil port C is connected to the front end of the locking cylinder 21. During operation, the control valve's oil inlet P is connected to both operating oil ports B and C, while the control valve's oil return port T is connected to operating oil port A. Alternatively, the control valve's oil inlet P is connected to both operating oil ports A and C, while the control valve's oil return port T is connected to operating oil port B. Alternatively, the control valve's oil inlet P, operating oil ports A, and operating oil port C are blocked, leaving the control valve's oil return port T connected to operating oil port C.

[0058] When the control valve's oil inlet P is connected to the working oil ports B and C, and the control valve's oil return port T is connected to the working oil port A, the top rod of the locking cylinder 21 retracts, the top rod of the lift cylinder 18 extends, and the frame 16 rises. When the control valve's oil inlet P is connected to the working oil ports A and C, and the control valve's oil return port T is connected to the working oil port B, the top rod of the locking cylinder 21 retracts, the top rod of the lift cylinder 18 retracts, and the frame 16 lowers. When the control valve's oil inlet P, working oil ports A, and C are blocked, and the control valve's oil return port T is connected to the working oil port C, the top rod of the locking cylinder 21 extends, the lift cylinder 18 does not operate, and the height of the frame 16 remains unchanged.

[0059] Specifically, V-shaped wheel legs 24 are connected to the left and right sides of the lower part of the wheel frame 17, and the depth-limiting wheel is installed at the lower end of the wheel legs 24. When in use, the V-shaped wheel legs 24 have a stable structure and strong supporting capacity. The cross-section of the wheel frame 17 is arc-shaped, and the four corners of the wheel frame 17 are connected to the upper ends of the wheel legs 24. When in use, the arc-shaped wheel frame 17 has a stable structure and strong supporting capacity. There are two guide columns 20, and the two guide columns 20 are respectively located on the front and rear sides of the wheel frame 17. When in use, the depth-limiting wheel and the wheel frame 17 move smoothly. A cylinder bellows 25 is connected between the lower end of the lifting cylinder 18 and the wheel frame 17. When in use, dust is prevented from affecting the operation of the lifting cylinder 18, and the failure rate is low. A guide column limit block 28 is provided at the upper end of the guide column 20. When in use, the guide column 20 is prevented from detaching from the guide sleeve 19. A lower guide sleeve bellows 26 is connected between the lower end of the guide sleeve 19 and the wheel frame 17, and an upper guide sleeve bellows 27 is connected between the upper end of the guide sleeve 19 and the guide post limit block 28. During use, dust is prevented from affecting the work of the guide sleeve 19 and the guide post 20, and a lower failure rate is achieved.

[0060] like Figures 4 to 9 As shown, the depth-limiting wheel includes a hub 2 and a tire 1. The hub 2 comprises two detachably connected spoke plates 201. A groove base plate 202 is connected to the edge of the spoke plate 201. A bead seat 203 is connected to the edge of the groove base plate 202. A fixing groove 8 is defined along the inner side of the groove base plate 202. The hub 2 also includes a guard plate 3. A spring clip 12 is connected to the edge of the guard plate 3. A fixing protrusion 13 is connected to the spring clip 12 and engages with the fixing groove 8. A fixing bolt mounting plate 10 is connected to the inner side of the guard plate 3. A fixing bolt 15 is threadedly connected to the fixing bolt mounting plate 10 and engages with the spring clip 12. The guard plate 3 defines an operating hole 6 corresponding to the fixing bolt 15. A plug 7 is detachably mounted in the operating hole 6. Specifically, the spoke plate 201, groove base plate 202, and bead seat 203 are integrated and can be stamped from steel plate to reduce manufacturing costs. Specifically, the fixing bolt mounting plate 10 defines a fixing bolt hole 14. During use, the fixing protrusion 13 is located in the fixing groove 8, and the front end of the fixing bolt 15 abuts against the spring piece 12. At this time, the guard plate 3 cannot be separated from the groove bottom plate 202. When the guard plate 3 needs to be removed, the plug 7 is first removed, and a screwdriver is inserted into the operating hole 6 to rotate the fixing bolt 15. The fixing bolt 15 is separated from the spring piece 12. At this time, the guard plate 3 is pulled, and the spring piece 12 is deformed under the action of external force, and the fixing protrusion 13 is separated from the fixing groove 8. The guard plates 3 are located on both sides of the wheel hub 2 to seal the internal space of the wheel hub 2, reducing the risk of soil, straw and other debris entering the wheel hub 2 during operation, thereby improving the safety of equipment operation.

[0061] Specifically, the edge of the guard plate 3 is connected to a guard plate outer ring 9 arranged along its circumference. The guard plate outer ring 9 is provided with a plurality of pairs of slots 11. The spring piece 12 is formed by the portion between each pair of slots 11. During use, the contact area between the guard plate outer ring 9 and the slot bottom plate 202 is large, which helps to improve the stability of the guard plate 3 and facilitates the processing of the spring piece 12.

[0062] Specifically, the fixing bolt mounting plate 10 is arranged along the circumference of the guard plate 3. This structure facilitates the processing and manufacturing of the fixing bolt mounting plate 10, and at the same time improves the connection and disconnection strength of the guard plate 3. The fixing bolt 15 is set at an angle. When the guard plate 3 needs to be disassembled, first remove the plug 7, insert the screwdriver into the operating hole 6 to rotate the fixing bolt 15, and the fixing bolt 15 is set at an angle for easy operation. The plug 7 is made of rubber. Specifically, the plug 7 and the operating hole 6 are connected by an interference fit. This structure facilitates the loading and unloading of the plug 7. An axle mounting hole 204 is provided on the spoke plate 201, and an axle through hole 4 is provided on the guard plate 3. A sealing ring 5 is installed on the inner side of the axle through hole 4. This structure facilitates the installation of the axle.

[0063] Specifically, the two spoke plates 201 are connected via a bolt and nut structure 207. Specifically, the spoke plates 201 are provided with a plurality of spoke connection holes 205. This structure facilitates the connection of the two spoke plates 201. The spoke plates 201 are also provided with a plurality of weight-reducing holes 206. This structure helps reduce the weight of the spoke plates 201.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A sowing depth adjustment mechanism, comprising a frame (16), a wheel frame (17), a limited depth wheel mounted on the wheel frame (17), characterized in that: A vertically arranged lifting cylinder (18) and a vertically arranged guide sleeve (19) are installed on the frame (16); a top rod of the lifting cylinder (18) is connected to the wheel frame (17); a guide column (20) matched with the guide sleeve (19) is installed on the wheel frame (17); a plurality of locking holes (23) are provided on the side of the guide column (20); a horizontally arranged locking cylinder (21) is installed on the frame (16); an oil inlet is provided at the front of the locking cylinder (21); a locking spring (22) is installed at the rear end of the locking cylinder (21); and the top rod of the locking cylinder (21) can match with the locking hole (23).

2. The sowing depth adjustment mechanism according to claim 1, characterized in that: The working oil ports A and B of the control valve are connected to the two ends of the lifting cylinder (18), and the working oil port C of the control valve is connected to the front end of the locking cylinder (21); when working, the oil inlet P of the control valve is connected to the working oil ports B and C, and the oil return port T of the control valve is connected to the working oil port A; or, the oil inlet P of the control valve is connected to the working oil ports A and C, and the oil return port T of the control valve is connected to the working oil port B; or, the oil inlet P, working oil port A and working oil port C of the control valve are closed, and the oil return port T of the control valve is connected to the working oil port C.

3. The sowing depth adjustment mechanism according to claim 1, wherein: The left and right sides of the lower portion of the wheel frame (17) are both connected with wheel legs (24) in a V-shape, and the depth-limiting wheel is mounted on the lower end of the wheel legs (24).

4. The sowing depth adjustment mechanism according to claim 3, characterized in that: The cross-section of the wheel frame (17) is arc-shaped, and the four corners of the wheel frame (17) are connected to the upper ends of the wheel legs (24).

5. The sowing depth adjustment mechanism according to claim 3, characterized in that: The number of the guide posts (20) is two, and the two guide posts (20) are respectively located at the front and rear sides of the wheel frame (17).

6. The sowing depth adjustment mechanism according to claim 1, characterized in that: A cylinder bellows (25) is connected between the lower end of the lifting cylinder (18) and the wheel frame (17).

7. The sowing depth adjustment mechanism according to claim 1, wherein: The upper end of the guide post (20) is provided with a guide post limiting block (28).

8. The sowing depth adjustment mechanism according to claim 7, characterized in that: A lower guide sleeve bellows (26) is connected between the lower end of the guide sleeve (19) and the wheel frame (17), and an upper guide sleeve bellows (27) is connected between the upper end of the guide sleeve (19) and the guide column limit block (28).

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