Oil cylinder capable of adjusting jacking height of plough

Abstract

The utility model relates to agricultural machinery, in particular to an oil cylinder capable of adjusting the jacking height of a plough. Comprising a cylinder body and a piston rod, the lower portion of the piston rod is located in the cylinder body and fixedly provided with a piston, the piston and the cylinder body slide relatively, the piston divides the cylinder body into an upper oil cavity and a lower oil cavity, the upper oil cavity is communicated with an oil nozzle, and the lower oil cavity is communicated with an oil port in a valve block through an oil pipe and a hydraulic oil channel in the valve block; the valve block is fixed to the top end of the outer side wall of the cylinder body, a hydraulic oil channel in the valve block comprises a valve cavity, a valve rod is arranged in the valve cavity, and the top end of the valve rod extends out of the top surface of the valve block. The upper portion of the piston rod is located outside the cylinder body, a limiting clamp is fixed to the piston rod located outside the cylinder body, the relative position between the limiting clamp and the piston rod is adjustable, and the surface of the bottom of the limiting clamp plays a role in limiting the valve rod. The jacking height of the plough can be accurately adjusted, it is guaranteed that the jacking height of the plough is not changed all the time in the working process of the plough, and it is guaranteed that the ploughing depth is consistent all the time.

Description

Technical Field

[0001] The utility model relates to agricultural machinery, in particular to an oil cylinder capable of adjusting the lifting height of a plow top. Background Art

[0002] Existing crop implements usually include a plow. During the driving of the crop implement, the plow is used to break up the land and plow furrows to prepare for sowing.

[0003] The connection between the existing plow and the crop implement is usually a follow-up connection, that is, the crop implement and the plow are usually connected flexibly. When the crop implement is working in the farmland, the entire implement usually fluctuates due to the uneven terrain, and the plow also floats up and down with the implement. When the plow floats up and down, the depth of the cultivated land will be unbalanced, resulting in the depth of the cultivated land not being equal everywhere, which will directly affect the subsequent planting efficiency of crops. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned defects of the prior art and proposes an oil cylinder with adjustable plow lifting height, which can accurately adjust the plow's lifting height and ensure that the plow's lifting height remains unchanged during operation, thereby ensuring that the tillage depth remains consistent.

[0005] The technical solution of the utility model is: an oil cylinder capable of adjusting the lifting height of the plow top, comprising a cylinder body and a piston rod, wherein the lower part of the piston rod is located in the cylinder body and is fixed with a piston, the piston and the cylinder body slide relatively, the piston divides the cylinder body into an upper oil chamber and a lower oil chamber, the upper oil chamber is connected with an oil nozzle, and the lower oil chamber is connected with an oil port on the valve block through an oil pipe and a hydraulic oil channel in the valve block;

[0006] The valve block is fixed to the top end of the outer wall of the cylinder body, and the hydraulic oil passage in the valve block includes a valve cavity, in which a valve stem is arranged, and the top end of the valve stem extends out of the top surface of the valve block;

[0007] The upper part of the piston rod is located outside the cylinder body, and a limit card is fixed on the piston rod located outside the cylinder body, and the relative position between the limit card and the piston rod is adjustable.

[0008] In the utility model, a cylinder bottom support is provided at the bottom of the cylinder body, an opening is provided at the top of the cylinder body, an upper sliding sleeve is fixed at the opening, a piston rod and the upper sliding sleeve are movably sealed and connected, and a piston and the inside of the cylinder body are movably sealed and connected;

[0009] A connecting piece connected to the plough is arranged on the top of the piston rod.

[0010] The oil nozzle is fixedly arranged on the outer side wall of the upper part of the cylinder body.

[0011] One side wall of the valve block is fixedly connected to the cylinder body, and an oil port is provided on the other side wall of the corresponding valve block, the oil port is connected to an external oil pump, and a reversing valve is provided on the connecting pipeline between the oil port and the oil pump;

[0012] The hydraulic oil passage also includes an oil hole, the oil hole is connected to the oil pipe, one end of the valve cavity is connected to the oil port, the other end of the valve cavity is connected to the oil hole, and the valve stem is movably arranged in the valve cavity;

[0013] A drum-shaped sealing gasket is arranged inside one end of the valve cavity facing the oil port, and a valve sleeve is arranged on the inner wall of the other end of the valve cavity. The valve sleeve is movably sealed and connected to the outer surface of the valve stem.

[0014] The valve chamber includes a first valve chamber connected to the oil port and a second valve chamber connected to the oil hole. The first valve chamber and the second valve chamber are connected. The diameter of the second valve chamber is larger than the diameter of the first valve chamber. The drum sealing gasket is arranged in the first valve chamber, and the valve sleeve is arranged in the second valve chamber.

[0015] A gland is fixed on the top surface of the valve block, a through hole for the valve stem to pass through is provided in the middle of the gland, and the end of the gland is fixedly connected to the valve block by bolts.

[0016] The limit clamp includes two symmetrically arranged limit clamps, the limit clamps are arc-shaped, and a circular space for the piston rod to pass through is formed between the opposite surfaces of the two limit clamps;

[0017] The corresponding one side ends of the two limiting clamps are rotatably connected via a rotating shaft, and the corresponding other side ends of the two limiting clamps are connected via a connecting bolt, and a butterfly nut is provided on the connecting bolt.

[0018] The beneficial effects of the utility model are:

[0019] Through the oil cylinder, when the plow is not in working state, the plow top can be raised to the highest position. At this time, the plow is not in contact with the ground, which protects the plow; when the plow is in working state, the lifting height of the plow can be adjusted according to the actual required tillage depth. At the same time, during the plowing process, the lifting height of the plow can be ensured to remain unchanged, thereby ensuring the consistency of the tillage depth and facilitating the subsequent planting of crops. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the piston rod in the utility model;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 4 It is a main structural schematic diagram of the utility model;

[0024] Figure 5 yes Figure 4 BB section structure schematic diagram;

[0025] Figure 6 yes Figure 5 Schematic diagram of the AA section structure after mid-rotation;

[0026] Figure 7 It is a structural schematic diagram of the valve block in the utility model;

[0027] Figure 8 yes Figure 7 Schematic diagram of the structure of the middle P surface;

[0028] Fig. 9 yes Figure 8 Schematic diagram of CC section structure;

[0029] Fig.10 It is a schematic diagram of the structure of the limit card.

[0030] In the figure: 1 cylinder bottom support; 2 valve block; 3 support ring; 4 connecting piece; 5 piston; 7 piston rod; 8 oil port; 9 valve chamber; 10 guide ring; 11 first valve chamber; 12 second valve chamber; 13 oil hole; 14 limit card; 15 pressure cover; 16 bolt; 18 drum sealing gasket; 19 first limit card half ring; 20 second limit card half ring; 21 rotating shaft; 22 connecting bolt; 23 butterfly nut; 24 valve sleeve; 25 valve stem; 27 oil pipe; 29 oil nozzle; 30 lower oil chamber; 31 upper oil chamber. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0032] The following description sets forth specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] like Figures 1 to 4As shown, the oil cylinder for adjusting the lifting height of the plow top described in the utility model includes a cylinder body 28, a cylinder bottom support 1 is fixed at the bottom end of the cylinder body 28, a piston rod 7 passes through the opening at the top end of the cylinder body 28 and extends into the cylinder body 28, and the cylinder bottom support 1 is connected to the machine by a pin. The piston rod 7 is slidably connected with the cylinder body 28. A piston 5 is fixed to the end of the piston rod 7 set in the cylinder body 28, and the piston 5 is slidably set in the cylinder body 28. The piston 5 divides the cavity inside the cylinder body 28 into an upper oil cavity 31 and a lower oil cavity 30, that is, the cylinder cavity above the piston 5 is the upper oil cavity 31, and the cylinder cavity below the piston 5 is the lower oil cavity 30. An oil nozzle 29 is fixed at the outer wall of the cylinder body where the upper oil cavity is located, and the oil nozzle 29 is connected to the upper oil cavity. The lower oil cavity is connected to the valve block 2 fixed on the outer wall of the cylinder body through an oil pipe 27, one end of the oil pipe 27 is connected to the lower oil cavity, and the other end of the oil pipe 27 is connected to the hydraulic oil channel in the valve block 2.

[0034] The upper end of the piston 7 is arranged outside the cylinder 28, and the end of the piston 7 outside the cylinder is connected to the limit card 14. A connecting piece 4 is fixed to the top of the piston 7, and the device is connected to the plow through the connecting piece 4. During the movement of the piston rod 7, the plow is lifted and lowered, and by controlling the lifting or falling height of the piston rod 7, the plowing depth of the plow can be accurately controlled.

[0035] like Figure 3 As shown, the piston 5 is sealed to the inner wall of the cylinder 28, and the piston 5 is sealed to the piston rod 7. A sealing ring and a support ring 3 are provided between the annular outer wall of the piston 5 and the inner wall of the cylinder 28, and a sealing ring is provided between the annular inner part of the piston 5 and the piston rod 7 to ensure the respective sealing between the lower oil chamber 30 and the upper oil chamber 31.

[0036] An upper sleeve 26 is provided at the opening at the top of the cylinder body 28, and the upper sleeve 26 is also sealed to the piston rod 7. A sealing ring is provided between the annular outer wall of the upper sleeve 26 and the inner wall of the cylinder body, and several sealing rings and a guide ring 10 are provided between the annular inner part of the upper sleeve 26 and the piston rod 7. The upper sleeve 26 ensures the sealing of the upper oil chamber 31. The guide ring 10 guides the reciprocating movement of the piston rod 7.

[0037] The valve block 2 is fixedly connected to the outer surface of the top of the cylinder body 28. Figures 5 to 9 As shown, one side of the valve block 2 is fixedly connected to the outside of the cylinder body 28, and the other side of the corresponding valve block 2 is provided with an oil port 8. The oil port 8 is connected to an external oil pump, and a reversing valve is provided on the connecting pipeline between the oil port 8 and the oil pump, and the reversing valve realizes the conversion of the oil port between the two working states of oil inlet or oil outlet.

[0038] A valve cavity 9 and an oil hole 13 are provided in the valve block 2. One end of the valve cavity 9 is connected to the oil port 8, and the other end of the valve cavity 9 is connected to the oil hole 13. The oil hole 13 is connected to the lower oil cavity 30 through an oil pipe 27. Figure 6 As shown, a valve stem 25 is slidably provided in the valve cavity 9 , one end of the valve stem 25 is located in the valve cavity 9 , and the other end of the valve stem 25 is located outside the valve block and faces the limit card 14 .

[0039] A drum-shaped sealing gasket 18 is provided on the inner wall of one end of the valve cavity 9 facing the oil port 8, and a valve sleeve 24 is provided on the inner wall of the other end of the corresponding valve cavity 9, and the valve sleeve 24 guides and seals the reciprocating movement of the valve stem 25. A sealing ring is provided between the outer surface of the valve sleeve 24 and the inner wall of the valve cavity 9, and a sealing ring is also provided between the inner wall of the valve sleeve 24 and the valve stem 25. When the valve stem 25 moves to the drum-shaped sealing gasket 18, the drum-shaped sealing gasket 18 seals the valve cavity, blocking the communication between the oil port 8 and the oil hole 13.

[0040] like Fig. 9 As shown, the valve chamber 9 in this embodiment includes a first valve chamber 11 communicated with the oil port 8, and a second valve chamber 12 communicated with the oil hole 13. The first valve chamber 11 and the second valve chamber 12 are communicated with each other, and the diameter of the second valve chamber 12 is larger than the diameter of the first valve chamber 11, so that the hydraulic oil in the first valve chamber 11 can flow into the second valve chamber 12. The drum sealing gasket 18 is arranged in the first valve chamber 11, and the valve sleeve 24 is arranged in the second valve chamber 12.

[0041] In order to fix the position of the valve sleeve 24, a gland 15 is fixed to the top surface of the valve block 2. Figure 5 As shown, in this embodiment, a through hole is provided in the middle of the gland 15 to facilitate the passage of the valve stem, and both ends of the gland 15 are fixedly connected to the valve block 2 by bolts 16 respectively.

[0042] In the present application, the limit card 14 can limit the position of the valve stem 25. Fig.10 As shown, the limit clamp includes two limit clamp half rings, namely a first limit clamp half ring 19 and a second limit clamp half ring 20. The two limit clamp half rings are arc-shaped and symmetrically arranged, so that a circular space is formed between the opposite surfaces of the two limit clamp half rings, and the piston rod passes through the circular space. The first limit clamp half ring 19 and the second limit clamp half ring 20 are connected to each other by a rotating shaft 21, and the first limit clamp half ring 19 and the second limit clamp half ring 20 are connected to each other by a connecting bolt 22, and a butterfly nut 23 is provided on the connecting bolt 22.

[0043] During the rotation of the butterfly nut 23, the piston rod 7 can be clamped and fixed between the two limit clamp half rings, thus achieving a fixed connection between the limit clamp and the piston rod. After the butterfly nut 23 is loosened, the limit clamp 14 and the piston rod 7 can slide relative to each other, and the relative position between the limit clamp and the piston rod can be changed.

[0044] The bottom surface of the limit card can limit the valve stem. By adjusting the distance between the limit card and the valve stem, the lifting height of the plow can be adjusted. When the top of the valve stem contacts the bottom surface of the limit card, the valve stem 25 will be quickly inserted into the valve cavity, and the bottom end of the valve stem will be inserted into the drum-shaped sealing gasket 18 of the first valve cavity 11. At this time, the valve stem 25 closes the valve cavity 9 to prevent hydraulic oil from flowing into or out of the lower oil cavity. When the plowing depth needs to be adjusted, it is necessary to adjust the position of the limit card 14 on the piston rod 7.

[0045] The working principle of the lifting cylinder is as follows. The connecting piece 4 of the lifting cylinder is connected to the upper plow. When the plow needs to be lifted, the external oil pump fills oil into the lifting cylinder. At this time, the hydraulic oil enters the valve chamber through the oil port 8, passes through the first valve chamber 11 and the second valve chamber 12 in turn, flows into the oil hole 13, and flows into the lower oil chamber 30 along the oil pipe 27. Under the pressure of the hydraulic oil in the lower oil chamber 30, the piston 5 is gradually lifted. At this time, the piston 5 moves upward along the inner wall of the cylinder body 28. At the same time, the piston 5 drives the piston rod 7 to extend upward, and the piston rod 7 drives the plow connected thereto to move upward, thereby realizing the lifting of the plow. When the machine with the plow does not need to plow the land, the plow is lifted to the highest position, which protects the plow.

[0046] When the machine needs to complete the plowing operation, first adjust the position of the limit card 14 on the piston rod 7, and according to the specific plowing depth, move the limit card 14 down along the piston rod 7 to the specified position and tighten it. The hydraulic oil in the oil tank enters the upper oil chamber 31 through the oil nozzle 29, and the oil pressure in the upper oil chamber 31 gradually increases. At the same time, the external oil pump draws out the hydraulic oil through the oil port 8. At this time, the piston 5 descends along the inner wall of the cylinder body 29. During the descent of the piston 5, the hydraulic oil in the lower oil chamber 30 enters the valve block 2 through the oil pipe 27, and is drawn out along the oil hole 13, the second valve chamber 12, the first valve chamber 11 and the oil port 8 in sequence. During the descent of the piston 5, the piston rod 7 is driven to descend. When the limit card 14 fixed on the piston rod 7 drops to contact with the top of the valve stem, the valve stem drops rapidly and falls into the first valve chamber 11, closing the valve chamber 9. At this time, the hydraulic oil in the lower oil chamber 30 can no longer flow out, and the piston rod 7 and the plow connected to the piston rod 7 stop continuing to descend, so that the plow can complete the corresponding action at a fixed plowing depth.

[0047] When the plowing depth needs to be increased, the limit card is moved down to the specified position along the piston rod, oil is injected into the upper oil chamber 31 through the oil nozzle 29, and the hydraulic oil in the lower oil chamber 30 is pumped out through the oil pump connected to the oil port 8, and the above action process is repeated. When the plowing depth needs to be reduced, hydraulic oil is injected into the lower oil chamber 30 through the oil pump connected to the oil port 8, and the piston rod and the plow connected to the piston rod are lifted to the specified height.

[0048] The above is a detailed introduction to the oil cylinder for adjusting the lifting height of the plow top provided by the utility model. The principle and implementation method of the utility model are explained in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model. The above description of the disclosed embodiments enables professional and technical personnel in this field to implement or use the utility model. The various modifications to these embodiments will be obvious to professional and technical personnel in this field, and the general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed in this article.

Claims

1. An oil cylinder capable of adjusting the lifting height of a plow, comprising a cylinder body and a piston rod, characterized in that: The lower part of the piston rod is located in the cylinder body, and a piston is fixed thereon. The piston and the cylinder body slide relative to each other, and the piston divides the cylinder body into an upper oil chamber and a lower oil chamber. The upper oil chamber is connected to the oil nozzle, and the lower oil chamber is connected to the oil port on the valve block through the oil pipe and the hydraulic oil channel in the valve block. The valve block is fixed to the top end of the outer wall of the cylinder body, and the hydraulic oil passage in the valve block includes a valve cavity, in which a valve stem is arranged, and the top end of the valve stem extends out of the top surface of the valve block; The upper part of the piston rod is located outside the cylinder body, and a limit card is fixed on the piston rod outside the cylinder body. The relative position between the limit card and the piston rod is adjustable, and the bottom surface of the limit card limits the valve stem.

2. The oil cylinder capable of adjusting the lifting height of the plow top according to claim 1, characterized in that: A cylinder bottom support is provided at the bottom of the cylinder body, an opening is provided at the top of the cylinder body, an upper sliding sleeve is fixed at the opening, a piston rod and the upper sliding sleeve are movably sealed and connected, and a piston and the inside of the cylinder body are movably sealed and connected; A connecting piece connected to the plough is arranged on the top of the piston rod.

3. The oil cylinder capable of adjusting the lifting height of the plow top according to claim 1, characterized in that: The oil nozzle is fixedly arranged on the outer side wall of the upper part of the cylinder body.

4. The oil cylinder capable of adjusting the lifting height of the plow top according to claim 1, characterized in that: One side wall of the valve block is fixedly connected to the cylinder body, and the other side wall of the corresponding valve block is provided with an oil port, which is connected to an external oil pump, and a reversing valve is provided on the connecting pipeline between the oil port and the oil pump; The hydraulic oil passage also includes an oil hole, the oil hole is connected to the oil pipe, one end of the valve cavity is connected to the oil port, the other end of the valve cavity is connected to the oil hole, and the valve stem is movably arranged in the valve cavity; A drum-shaped sealing gasket is arranged inside one end of the valve cavity facing the oil port, and a valve sleeve is arranged on the inner wall of the other end of the valve cavity. The valve sleeve is movably sealed and connected to the outer surface of the valve stem.

5. The oil cylinder capable of adjusting the lifting height of the plow top according to claim 4, characterized in that: The valve chamber includes a first valve chamber connected to the oil port and a second valve chamber connected to the oil hole. The first valve chamber and the second valve chamber are connected. The diameter of the second valve chamber is larger than the diameter of the first valve chamber. The drum sealing gasket is arranged in the first valve chamber, and the valve sleeve is arranged in the second valve chamber.

6. The oil cylinder capable of adjusting the lifting height of the plow top according to claim 4, characterized in that: A gland is fixed on the top surface of the valve block, a through hole for the valve stem to pass through is provided in the middle of the gland, and the end of the gland is fixedly connected to the valve block by bolts.

7. The oil cylinder capable of adjusting the lifting height of the plow top according to claim 1, characterized in that: The limit clamp includes two symmetrically arranged limit clamps, the limit clamps are arc-shaped, and a circular space for the piston rod to pass through is formed between the opposite surfaces of the two limit clamps; The corresponding one side ends of the two limiting clamps are rotatably connected via a rotating shaft, and the corresponding other side ends of the two limiting clamps are connected via a connecting bolt, and a butterfly nut is provided on the connecting bolt.

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