Electromagnetic control hydraulic conversion valve of farmland machinery

Abstract

The invention discloses an electromagnetic control hydraulic steering valve of farmland machinery, and relates to the technical field of steering valves, the electromagnetic control hydraulic steering valve comprises a valve body and an oil body control mechanism, the oil body control mechanism comprises a first electromagnet and a second electromagnet, and the bottom of the first electromagnet and the bottom of the second electromagnet are both installed on the top of the valve body; a first round hole is formed in the side of the top of the partition plate, a second round hole is formed in the side, away from the first round hole, of the top of the partition plate, a swing plate is hinged to the middle of the top of the inner cavity of the valve body through a support and installed in the upper oil cavity, and a first magnetic block is installed at the top of the swing plate and close to the bottom of the first electromagnet. A second magnetic block is installed at the top of the swing plate and close to the bottom of the second electromagnet, and plugging assemblies are installed at the two ends of the bottom of the swing plate. The electromagnetic control hydraulic conversion valve of the farmland machinery achieves the effect of flexible control, is quick in response, accurate in flow direction of an oil body, and flexible, safe and reliable to use.

Description

Technical Field

[0001] The invention relates to the technical field of steering valves, and in particular to an electromagnetically controlled hydraulic steering valve for farm machinery. Background Art

[0002] The electromagnetically controlled hydraulic steering valve is a device that uses electromagnetic force to control the flow of hydraulic oil to achieve the steering function. The electromagnetically controlled hydraulic steering valve has the advantages of fast response speed, high control accuracy, and good reliability. The hydraulic steering system is widely used in various engineering machinery, agricultural machinery, and automobile fields due to its significant power-assisting effect and reliable mechanical hydraulic structure. The hydraulic steering gear is a steering device commonly used in engineering machinery, agricultural machinery, and other engineering vehicles. With the rapid development of agriculture, the application of farmland machinery is increasing, and the use of hydraulic steering valves is also increasing.

[0003] At present, the existing hydraulic steering valve is not convenient to accurately control the flow direction of the hydraulic oil during use, and the response is not fast enough, resulting in inflexible use, thereby affecting the overall steering. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: an electromagnetically controlled hydraulic steering valve for farm machinery, comprising:

[0005] A valve body, the valve body having a supporting shell, an oil inlet pipe installed at the side of the top of the valve body, a partition installed in the middle of the inner cavity of the valve body, the partition dividing the inner cavity of the valve body into an upper oil cavity and a lower oil cavity;

[0006] The lower oil chamber comprises a flat plate, which is installed between the bottom of the partition plate and the bottom of the inner cavity of the valve body, and the flat plate divides the bottom of the inner cavity of the valve body into a first cavity and a second cavity;

[0007] An oil control mechanism, which is used to control the flow direction of the hydraulic oil and is installed on the top of the valve body;

[0008] The oil body control mechanism includes a first electromagnet and a second electromagnet, the bottom of the first electromagnet and the bottom of the second electromagnet are both installed on the top of the valve body, the first electromagnet and the second electromagnet are installed at the same height, a first circular hole is opened at the side of the top of the partition, a second circular hole is opened at the top of the partition and on the side away from the first circular hole, a swing plate is hingedly connected to the middle of the top of the inner cavity of the valve body through a bracket, the swing plate is installed in the upper oil cavity, a first magnetic block is installed on the top of the swing plate and close to the bottom of the first electromagnet, and the top of the swing plate A second magnetic block is installed at the bottom of the swing plate and close to the second electromagnet, and sealing assemblies are installed at both ends of the bottom of the swing plate. The first electromagnet is energized and the second electromagnet is de-energized, so that the first electromagnet generates a magnetic force of attraction to the first magnetic block. The first magnetic block is acted upon by the magnetic attraction force, so that the swing plate drives the sealing assembly to rotate clockwise to adjust the angle. When the swing plate is in an inclined state, the second circular hole can be sealed by the sealing assembly, and the hydraulic oil that properly enters the upper oil chamber can only flow from the first circular hole into the first chamber, so that the hydraulic oil can flow in a specified direction.

[0009] Preferably, the partition and the flat plate are installed vertically, and the flat plate is installed in the middle of the bottom of the partition, so that the volume of the first cavity and the volume of the second cavity are equal. The swing plate is installed vertically, the second electromagnet is energized, and the first electromagnet is de-energized, so that the second electromagnet magnetically attracts the second magnetic block, so that the swing plate drives the sealing assembly to rotate counterclockwise to adjust the angle, so that the first circular hole can be blocked, and the hydraulic oil in the upper oil chamber changes its flow direction and flows into the second cavity from the second circular hole, so that the electromagnetic attraction is fully utilized and the flow direction of the hydraulic oil is flexibly controlled.

[0010] Preferably, the plugging assembly includes a connecting block, the top of the connecting block is fixedly mounted to the bottom end of the swing plate, a plugging ball is fixedly mounted in the middle of the bottom of the connecting block, a conical blind hole is opened in the middle of the bottom of the plugging ball, a sealing ring is fixedly mounted on the spherical surface of the outer side of the plugging ball and close to the conical blind hole, when the swing plate drives the plugging assembly as a whole to rotate and adjust the angle, the symmetrical plugging balls on both sides swing with the swing plate, so that the plugging balls can block the first hole and the second hole;

[0011] At the same time, the sealing ring is squeezed and deformed, which increases the contact area between the sealing ball and the hole, making the sealing effect better and preventing seepage from occurring.

[0012] Preferably, there are two sealing balls, and the two sealing balls are symmetrically installed along the bracket on the top of the swing plate. The material of the sealing ring is rubber, which is convenient for sealing.

[0013] Preferably, a limit assembly is installed inside the first cavity and the second cavity and near the first circular hole and the second circular hole, and the limit assembly includes a connecting base, the connecting base is fixedly installed to the side of the inner side of the first cavity by screws, and a cylindrical pressure rod is slidably installed on the end of the connecting base away from the inner wall of the first cavity, and a conical block is fixedly installed on the top of the cylindrical pressure rod, and a return spring is fixedly installed between the bottom of the conical block and the top of the connecting base and near the position of the cylindrical pressure rod, and the bottom end of the cylindrical pressure rod is fixedly installed with a circular ring through a connecting rod. When the swing plate rotates and drives the blocking ball to move downward, the blocking ball cooperates with the hole, and the tip of the conical block faces upward, so that the tip of the conical block is inserted into the inside of the conical blind hole, and under the support of the cylindrical pressure rod, the blocking ball can be limited, so that the blocking ball is not easy to deviate, the overall structure is more stable, and the structures are connected together by interaction between the structures.

[0014] Preferably, the cylindrical pressure rod passes through the center of the return spring, so as to facilitate compression of the return spring by the conical block, so that the return spring is not easily twisted, and the cylindrical pressure rod is installed directly below the cylindrical pressure rod.

[0015] Preferably, the axis at the center of the conical block coincides with the axis at the center of the cylindrical pressure rod, and the tip of the conical block faces upward.

[0016] Preferably, an oil outlet mechanism is installed at the bottom of the valve body and near the first cavity and the second cavity, and the oil outlet mechanism comprises an upper conical cover, the upper conical cover is fixedly installed at the bottom of the valve body, and the bottom of the upper conical cover is fixedly installed with a lower conical cover by bolts, the upper conical cover and the bottom of the valve body are sealed, a connecting ring is fixedly installed at the top of the upper conical cover, an annular extension edge is fixedly installed at the edge of the outer side of the connecting ring, and the bottom end of the lower conical cover is connected with an oil outlet pipe, and a secondary sealing assembly is installed between the interior of the upper conical cover and the interior of the lower conical cover. When the tip of the conical block is inserted into the conical blind hole, the conical block will be subjected to the downward pressing force of the sealing ball, and under the support of the connecting base and combined with the cylindrical pressure rod, it can be slidably connected, so that the cylindrical pressure rod drives the conical block and the circular ring to move downward together, and the return spring is compressed, so that the circular ring can be used to contact the annular extension edge, and the annular extension edge can be pressed by the circular ring to seal, thereby facilitating the smooth flow of hydraulic oil in the cavity.

[0017] Preferably, the lower conical cover is installed directly below the upper conical cover, and the material of the annular extension edge is rubber.

[0018] Preferably, the secondary sealing assembly includes an elastic cylinder, which is installed between the middle of the upper conical cover and the middle of the lower conical cover, and the top and bottom ends of the elastic cylinder are both conical, and an annular seal is fixedly installed on the conical surface of the outer side of the elastic cylinder, and the material of the annular seal is rubber. A spiral sheet is fixedly installed in the middle of the inner cavity of the elastic cylinder. When the lower conical cover and the upper conical cover are fixed by bolts, the elastic cylinder can be subjected to the extrusion force of the lower conical cover and the upper conical cover, so that the annular seal is squeezed, which can fill the gap between the elastic cylinder and the inner wall of the lower conical cover and the inner wall of the upper conical cover, and the conical surfaces cooperate with each other to perform secondary sealing, which is not prone to leakage.

[0019] Under the connection and guidance of the elastic cylinder, the hydraulic oil enters the elastic cylinder and contacts the spiral sheet. The hydraulic oil is guided by the spiral sheet to swirl, thereby reducing the impact force of the fluid and protecting the mechanism.

[0020] The present invention provides an electromagnetically controlled hydraulic steering valve for farm machinery. The valve has the following beneficial effects:

[0021] 1. The electromagnetically controlled hydraulic steering valve of the farm machinery uses the first electromagnet to energize and the second electromagnet to de-energize, so that the first electromagnet generates an attractive magnetic force on the first magnetic block, so that the swing plate drives the blocking component to rotate clockwise to adjust the angle. With the swing plate in an inclined state, the second circular hole can be blocked by the blocking component, and the hydraulic oil that properly enters the upper oil chamber can only flow from the first circular hole into the first chamber, so that the hydraulic oil can flow in the specified direction.

[0022] 2. The electromagnetically controlled hydraulic steering valve of the farm machinery uses the second electromagnet to energize and the first electromagnet to de-energize, so that the second electromagnet magnetically attracts the second magnetic block, thereby causing the swing plate to drive the sealing component to rotate counterclockwise to adjust the angle, so that the first circular hole can be blocked, and the hydraulic oil in the upper oil chamber changes its flow direction and flows into the second chamber from the second circular hole, thereby making full use of the electromagnetic attraction and flexibly controlling the flow direction of the hydraulic oil.

[0023] 3. The electromagnetically controlled hydraulic steering valve of the farm machinery, when the swing plate drives the sealing component to rotate and adjust the angle as a whole, the symmetrical sealing balls on both sides swing with the swing plate, so that the sealing balls can seal the first circular hole and the second circular hole. At the same time, the sealing ring is squeezed and deformed, increasing the contact area between the sealing balls and the holes, so that the sealing effect is good and seepage is not likely to occur.

[0024] Fourth, the electromagnetically controlled hydraulic steering valve of the farm machinery, when the swing plate rotates and drives the blocking ball to move downward, the blocking ball cooperates with the hole, and the tip of the cone block is facing upward, so that the tip of the cone block is inserted into the inside of the conical blind hole, and with the support of the cylindrical pressure rod, the blocking ball can be limited, so that the blocking ball is not easy to deviate, and the overall structure is more stable.

[0025] 5. The electromagnetically controlled hydraulic steering valve of the farm machinery, when the tip of the conical block is inserted into the conical blind hole, the conical block will be pressed downward by the sealing ball, and under the support of the connecting base and combined with the slidable connection of the cylindrical pressure rod, the cylindrical pressure rod drives the conical block and the circular ring to move downward together, and the return spring is compressed, so that the circular ring can be used to contact the annular extension edge, and the annular extension edge can be pressed by the circular ring to seal, thereby helping the hydraulic oil in the cavity to flow out smoothly.

[0026] 6. The electromagnetically controlled hydraulic steering valve of the farm machinery, when the lower conical cover and the upper conical cover are fixed by bolts, the elastic cylinder can be squeezed by the lower conical cover and the upper conical cover, so that the annular seal is squeezed, which can fill the gap between the elastic cylinder and the inner wall of the lower conical cover and the inner wall of the upper conical cover, and the conical surfaces cooperate with each other to perform secondary sealing, which is not prone to leakage.

[0027] 7. The electromagnetically controlled hydraulic steering valve of the farm machinery allows the hydraulic oil to enter the elastic cylinder under the connection and guidance of the elastic cylinder, and makes the hydraulic oil contact with the spiral vane. The hydraulic oil is guided by the spiral vane to swirl, thereby reducing the impact force of the fluid and protecting the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the electromagnetically controlled hydraulic steering valve of the farm machinery of the present invention;

[0029] Figure 2 It is a schematic diagram of the cross-sectional structure of the electromagnetically controlled hydraulic steering valve of the farm machinery of the present invention;

[0030] Figure 3 It is a schematic diagram of the connection structure between the oil body control mechanism and the valve body of the present invention;

[0031] Figure 4 This is a schematic diagram of the overall structure of the plugging assembly of the present invention;

[0032] Figure 5 It is a schematic diagram of the connection structure between the limit assembly and the valve body of the present invention;

[0033] Figure 6 It is a schematic diagram of the overall structure of the limit assembly of the present invention;

[0034] Figure 7 It is a schematic diagram of the connection structure between the oil outlet mechanism and the valve body of the present invention;

[0035] Figure 8 It is a schematic diagram of the overall structure of the oil outlet mechanism of the present invention;

[0036] Fig. 9 It is a schematic diagram of the disassembled structure of the oil outlet mechanism of the present invention.

[0037] In the figure: 1, valve body; 2, oil inlet pipe; 3, partition; 4, upper oil chamber; 5, lower oil chamber; 6, oil body control mechanism; 7, limit assembly; 8, oil outlet mechanism; 51, flat plate; 52, first chamber; 53, second chamber; 61, first electromagnet; 62, second electromagnet; 63, first circular hole; 64, second circular hole; 65, swing plate; 66, first magnetic block; 67, second magnetic block; 68, plugging assembly; 681, Connecting block; 682, sealing ball; 683, conical blind hole; 684, sealing ring; 71, connecting base; 72, cylindrical pressure rod; 73, conical block; 74, return spring; 75, circular ring; 81, upper conical cover; 82, lower conical cover; 83, connecting ring; 84, annular extension edge; 85, oil outlet pipe; 86, secondary sealing assembly; 861, elastic cylinder; 862, annular seal; 863, spiral sheet. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0039] The first embodiment, as Figure 1-Figure 4 As shown, the present invention provides a technical solution: an electromagnetically controlled hydraulic steering valve for farm machinery, comprising:

[0040] A valve body 1, which has a supporting shell, an oil inlet pipe 2 is installed at the side of the top of the valve body 1, and a partition 3 is installed in the middle of the inner cavity of the valve body 1, and the partition 3 divides the inner cavity of the valve body 1 into an upper oil cavity 4 and a lower oil cavity 5;

[0041] The lower oil chamber 5 includes a flat plate 51, which is installed between the bottom of the partition plate 3 and the bottom of the inner chamber of the valve body 1. The flat plate 51 divides the bottom of the inner chamber of the valve body 1 into a first chamber 52 and a second chamber 53;

[0042] An oil control mechanism 6, which is used to control the flow direction of the hydraulic oil, and is installed on the top of the valve body 1;

[0043] The oil body control mechanism 6 includes a first electromagnet 61 and a second electromagnet 62. The bottom of the first electromagnet 61 and the bottom of the second electromagnet 62 are both installed on the top of the valve body 1. The first electromagnet 61 and the second electromagnet 62 are installed at the same height. A first circular hole 63 is opened at the side of the top of the partition 3. A second circular hole 64 is opened at the top of the partition 3 and on the side away from the first circular hole 63. A swing plate 65 is hingedly connected to the middle of the top of the inner cavity of the valve body 1 through a bracket. The swing plate 65 is installed in the upper oil cavity 4. A first magnetic block 66 is installed on the top of the swing plate 65 and close to the bottom of the first electromagnet 61. The top of the swing plate 65 and close to the second electromagnet A second magnetic block 67 is installed at the bottom of the iron 62, and sealing components 68 are installed at both ends of the bottom of the swing plate 65. The staff energizes the first electromagnet 61 and de-energizes the second electromagnet 62, so that the first electromagnet 61 generates an attractive magnetic force on the first magnetic block 66. By utilizing the magnetic attraction of the first magnetic block 66, the swing plate 65 drives the sealing component 68 to rotate clockwise to adjust the angle. By utilizing the swing plate 65 in an inclined state, the second circular hole 64 can be sealed by the sealing component 68, and the hydraulic oil that properly enters the upper oil chamber 4 can only flow from the first circular hole 63 to the first cavity 52, so that the hydraulic oil can flow in the specified direction.

[0044] The partition 3 and the flat plate 51 are installed vertically, and the flat plate 51 is installed in the middle of the bottom of the partition 3, so that the volume of the first cavity 52 and the volume of the second cavity 53 are equal, and the swing plate 65 is installed vertically.

[0045] The staff energizes the second electromagnet 62 and deenergizes the first electromagnet 61, so that the second electromagnet 62 magnetically attracts the second magnetic block 67, thereby causing the swing plate 65 to drive the sealing assembly 68 to rotate counterclockwise to adjust the angle, so that the first circular hole 63 can be blocked, and the hydraulic oil in the upper oil chamber 4 changes its flow direction and flows from the second circular hole 64 into the second cavity 53, thereby making full use of electromagnetic attraction and flexibly controlling the flow direction of the hydraulic oil.

[0046] The plugging assembly 68 includes a connecting block 681, the top of the connecting block 681 is fixedly installed with the bottom end of the swing plate 65, a plugging ball 682 is fixedly installed in the middle of the bottom of the connecting block 681, a conical blind hole 683 is opened in the middle of the bottom of the plugging ball 682, and a sealing ring 684 is fixedly installed on the spherical surface outside the plugging ball 682 and near the conical blind hole 683. When the swing plate 65 drives the plugging assembly 68 as a whole to rotate and adjust the angle, the symmetrical plugging balls 682 on both sides swing with the swing plate 65, so that the plugging balls 682 can block the first hole 63 and the second hole 64.

[0047] At the same time, the sealing ring 684 is squeezed and deformed, which increases the contact area between the sealing ball 682 and the hole, so that the sealing effect is good and seepage is not likely to occur.

[0048] There are two sealing balls 682, and the two sealing balls 682 are symmetrically installed along the bracket at the top of the swing plate 65. The material of the sealing ring 684 is rubber, which is convenient for sealing.

[0049] The second embodiment, as Figure 1-Figure 6 As shown, based on the first embodiment:

[0050] The inside of the first cavity 52 and the inside of the second cavity 53 and the positions close to the first circular hole 63 and the second circular hole 64 are both installed with a limit assembly 7, and the limit assembly 7 includes a connecting base 71, and the connecting base 71 is fixedly installed with the side of the inner side of the first cavity 52 by screws, and a cylindrical pressure rod 72 is slidably installed at one end of the connecting base 71 away from the inner wall of the first cavity 52, and a conical block 73 is fixedly installed at the top of the cylindrical pressure rod 72, and a conical block 73 is fixedly installed between the bottom of the conical block 73 and the top of the connecting base 71 and close to the cylindrical pressure rod 72. A return spring 74 is fixedly installed at the position, and a circular ring 75 is fixedly installed at the bottom end of the cylindrical pressure rod 72 through a connecting rod. When the swing plate 65 rotates and drives the blocking ball 682 to move downward, the blocking ball 682 cooperates with the hole, and the tip of the conical block 73 faces upward, so that the tip of the conical block 73 is inserted into the inside of the conical blind hole 683, and with the support of the cylindrical pressure rod 72, the blocking ball 682 can be limited, so that the blocking ball 682 is not easy to deviate, and the overall structure is more stable.

[0051] The cylindrical pressure rod 72 passes through the center of the return spring 74 to facilitate compression of the return spring 74 through the conical block 73, so that the return spring 74 is not easily twisted. The cylindrical pressure rod 72 is installed directly below the cylindrical pressure rod 72.

[0052] The axis at the center of the conical block 73 coincides with the axis at the center of the cylindrical pressure rod 72, and the tip of the conical block 73 faces upward.

[0053] The third embodiment, as Figure 1-Figure 9 As shown, based on the first and second embodiments:

[0054] The bottom of the valve body 1 and the position close to the first cavity 52 and the second cavity 53 are both equipped with an oil outlet mechanism 8, and the oil outlet mechanism 8 includes an upper conical cover 81, which is fixedly installed on the bottom of the valve body 1, and a lower conical cover 82 is fixedly installed on the bottom of the upper conical cover 81 by bolts, and the upper conical cover 81 and the bottom of the valve body 1 are sealed. A connecting ring 83 is fixedly installed on the top of the upper conical cover 81, and an annular extension edge 84 is fixedly installed on the edge of the outer side of the connecting ring 83. The bottom end of the lower conical cover 82 is connected with an oil outlet pipe 85, and the interior of the upper conical cover 81 and the interior of the lower conical cover 82 are connected. A secondary sealing assembly 86 is installed between the parts. When the tip of the conical block 73 is inserted into the conical blind hole 683, the conical block 73 will be pressed downward by the sealing ball 682, and under the support of the connecting base 71 and combined with the slidable connection of the cylindrical pressure rod 72, the cylindrical pressure rod 72 drives the conical block 73 and the circular ring 75 to move downward together, and the return spring 74 is compressed, so that the circular ring 75 can be used to contact the annular extension edge 84, and the annular extension edge 84 can be pressed by the circular ring 75 to seal, thereby helping the hydraulic oil in the cavity to flow out smoothly.

[0055] The lower conical cover 82 is installed directly below the upper conical cover 81 , and the material of the annular extension edge 84 is rubber.

[0056] The secondary sealing component 86 includes an elastic cylinder 861, which is installed between the middle of the upper conical cover 81 and the middle of the lower conical cover 82, and the top and bottom ends of the elastic cylinder 861 are both conical. An annular seal 862 is fixedly installed on the conical surface of the outer side of the elastic cylinder 861. The material of the annular seal 862 is rubber. A spiral piece 863 is fixedly installed in the middle of the inner cavity of the elastic cylinder 861. When the lower conical cover 82 and the upper conical cover 81 are fixed by bolts, the elastic cylinder 861 can be subjected to the squeezing force of the lower conical cover 82 and the upper conical cover 81, so that the annular seal 862 is squeezed, which can fill the gap between the elastic cylinder 861 and the inner wall of the lower conical cover 82 and the inner wall of the upper conical cover 81, and the conical surfaces cooperate with each other to perform secondary sealing, which is not prone to leakage.

[0057] Under the connection and guidance of the elastic cylinder 861, the hydraulic oil enters the elastic cylinder 861 and contacts the spiral sheet 863. The spiral sheet 863 guides the hydraulic oil, causing the hydraulic oil to swirl, thereby reducing the impact force of the fluid.

[0058] When in use, first place the secondary sealing assembly 86 as a whole into the lower conical cover 82, and install the lower conical cover 82 on the bottom of the upper conical cover 81 and fix it with bolts, so that the elastic cylinder 861 can be squeezed by the lower conical cover 82 and the upper conical cover 81, so that the annular seal 862 is squeezed, so that the gap between the elastic cylinder 861 and the inner wall of the lower conical cover 82 and the inner wall of the upper conical cover 81 can be filled, and the conical surfaces cooperate with each other, so that secondary sealing can be performed, and leakage is not likely to occur;

[0059] Hydraulic oil is injected into the upper oil chamber 4 from the oil inlet pipe 2. At this time, the staff energizes the first electromagnet 61 and deenergizes the second electromagnet 62, so that the first electromagnet 61 generates a magnetic force of attraction to the first magnetic block 66. The first magnetic block 66 is subjected to the magnetic attraction force, so that the swing plate 65 drives the blocking component 68 to rotate clockwise to adjust the angle. With the swing plate 65 in an inclined state, the second circular hole 64 can be blocked by the blocking component 68. The hydraulic oil that properly enters the upper oil chamber 4 can only flow from the first circular hole 63 to the first cavity 52, so that the hydraulic oil can flow in the specified direction;

[0060] The staff energizes the second electromagnet 62 and deenergizes the first electromagnet 61, so that the second electromagnet 62 magnetically attracts the second magnetic block 67, so that the swing plate 65 drives the blocking assembly 68 to rotate counterclockwise to adjust the angle, so that the first circular hole 63 can be blocked, so that the hydraulic oil in the upper oil chamber 4 changes its flow direction and flows from the second circular hole 64 into the second cavity 53, making full use of electromagnetic attraction to flexibly control the flow direction of the hydraulic oil;

[0061] The symmetrical blocking balls 682 on both sides are used to swing along with the swing plate 65, so that the blocking balls 682 can block the first circular hole 63 and the second circular hole 64;

[0062] At the same time, the sealing ring 684 is squeezed and deformed, increasing the contact area between the sealing ball 682 and the hole, so that the sealing effect is good and seepage is not likely to occur;

[0063] And by using the blocking ball 682 to cooperate with the hole, and combining with the tip of the conical block 73 facing upward, the tip of the conical block 73 is inserted into the inside of the conical blind hole 683, and under the support of the cylindrical pressure rod 72, the blocking ball 682 can be limited, so that the blocking ball 682 is not easy to deviate, and the overall structure is more stable;

[0064] Moreover, when the tip of the conical block 73 is inserted into the conical blind hole 683, the conical block 73 is pressed downward by the blocking ball 682, and under the support of the connection base 71, the cylindrical pressure rod 72 is slidably connected, so that the cylindrical pressure rod 72 drives the conical block 73 and the circular ring 75 to move downward together, and the return spring 74 is compressed, so that the circular ring 75 can be used to contact the annular extension edge 84, and the circular ring 75 can press the annular extension edge 84 to seal, thereby facilitating the smooth flow of hydraulic oil in the cavity;

[0065] Under the connection and guidance of the elastic cylinder 861, the hydraulic oil enters the elastic cylinder 861 and contacts the spiral sheet 863. The spiral sheet 863 guides the hydraulic oil, causing the hydraulic oil to swirl, thereby reducing the impact force of the fluid.

[0066] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. An electromagnetically controlled hydraulic steering valve for farm machinery, characterized in that: include: A valve body (1), the valve body (1) having a supporting shell, an oil inlet pipe (2) being installed at the side of the top of the valve body (1), a partition plate (3) being installed in the middle of the inner cavity of the valve body (1), the partition plate (3) dividing the inner cavity of the valve body (1) into an upper oil cavity (4) and a lower oil cavity (5); The lower oil chamber (5) comprises a flat plate (51), the flat plate (51) being installed between the bottom of the partition plate (3) and the bottom of the inner chamber of the valve body (1), the flat plate (51) dividing the bottom of the inner chamber of the valve body (1) into a first chamber (52) and a second chamber (53); An oil control mechanism (6), the oil control mechanism (6) is used to control the flow direction of the hydraulic oil, and the oil control mechanism (6) is installed on the top of the valve body (1); The oil body control mechanism (6) comprises a first electromagnet (61) and a second electromagnet (62), the bottom of the first electromagnet (61) and the bottom of the second electromagnet (62) are both mounted on the top of the valve body (1), the first electromagnet (61) and the second electromagnet (62) are mounted at the same height, a first circular hole (63) is provided at the side of the top of the partition (3), a second circular hole (64) is provided at the top of the partition (3) and on a side away from the first circular hole (63), a swing plate (65) is hingedly connected to the middle of the top of the inner cavity of the valve body (1) through a bracket, the swing plate (65) is mounted inside the upper oil cavity (4), a first magnetic block (66) is mounted on the top of the swing plate (65) and close to the bottom of the first electromagnet (61), a second magnetic block (67) is mounted on the top of the swing plate (65) and close to the bottom of the second electromagnet (62), and blocking components (68) are mounted on both ends of the bottom of the swing plate (65).

2. The electromagnetically controlled hydraulic steering valve for farm machinery according to claim 1, characterized in that: The partition (3) and the flat plate (51) are installed vertically, and the flat plate (51) is installed in the middle of the bottom of the partition (3), and the swing plate (65) is installed vertically.

3. The electromagnetically controlled hydraulic steering valve for farm machinery according to claim 1, characterized in that: The blocking assembly (68) comprises a connecting block (681), the top of the connecting block (681) is fixedly mounted to the bottom of the swing plate (65), a blocking ball (682) is fixedly mounted in the middle of the bottom of the connecting block (681), a conical blind hole (683) is provided in the middle of the bottom of the blocking ball (682), and a sealing ring (684) is fixedly mounted on the spherical surface of the outer side of the blocking ball (682) and close to the conical blind hole (683).

4. The electromagnetically controlled hydraulic steering valve for farm machinery according to claim 3, characterized in that: There are two sealing balls (682), and the two sealing balls (682) are symmetrically installed along the bracket at the top of the swing plate (65), and the material of the sealing ring (684) is rubber.

5. The electromagnetically controlled hydraulic steering valve for farm machinery according to claim 1, characterized in that: A limit assembly (7) is installed inside the first cavity (52) and inside the second cavity (53) and near the first circular hole (63) and the second circular hole (64). The limit assembly (7) includes a connecting base (71). The connecting base (71) is fixedly installed to the side of the inner side of the first cavity (52) by screws. A cylindrical pressure rod (72) is slidably installed at one end of the connecting base (71) away from the inner wall of the first cavity (52). A conical block (73) is fixedly installed at the top of the cylindrical pressure rod (72). A return spring (74) is fixedly installed between the bottom of the conical block (73) and the top of the connecting base (71) and near the cylindrical pressure rod (72). A circular ring (75) is fixedly installed at the bottom end of the cylindrical pressure rod (72) via a connecting rod.

6. The electromagnetically controlled hydraulic steering valve for farm machinery according to claim 5, characterized in that: The cylindrical pressure rod (72) passes through the center of the return spring (74), and the cylindrical pressure rod (72) is installed directly below the cylindrical pressure rod (72).

7. The electromagnetically controlled hydraulic steering valve for farm machinery according to claim 5, characterized in that: The axis at the center of the conical block (73) coincides with the axis at the center of the cylindrical pressure rod (72), and the tip of the conical block (73) faces upward.

8. The electromagnetically controlled hydraulic steering valve for farm machinery according to claim 1, characterized in that: An oil outlet mechanism (8) is installed at the bottom of the valve body (1) and near the first cavity (52) and the second cavity (53). The oil outlet mechanism (8) comprises an upper conical cover (81). The upper conical cover (81) is fixedly installed at the bottom of the valve body (1). A lower conical cover (82) is fixedly installed at the bottom of the upper conical cover (81) by bolts. The upper conical cover (81) and the bottom of the valve body (1) are sealed. A connecting ring (83) is fixedly installed at the top of the upper conical cover (81). An annular extension edge (84) is fixedly installed at the outer edge of the connecting ring (83). The bottom end of the lower conical cover (82) is connected to an oil outlet pipe (85). A secondary sealing component (86) is installed between the interior of the upper conical cover (81) and the interior of the lower conical cover (82).

9. The electromagnetically controlled hydraulic steering valve for farm machinery according to claim 8, characterized in that: The lower conical cover (82) is installed directly below the upper conical cover (81), and the material of the annular extension edge (84) is rubber.

10. The electromagnetically controlled hydraulic steering valve for farm machinery according to claim 8, characterized in that: The secondary sealing component (86) includes an elastic cylinder (861), which is installed between the middle of the interior of the upper conical cover (81) and the middle of the interior of the lower conical cover (82), and the top and bottom ends of the elastic cylinder (861) are both conical. An annular seal (862) is fixedly installed on the conical surface outside the elastic cylinder (861), and the material of the annular seal (862) is rubber. A spiral piece (863) is fixedly installed in the middle of the inner cavity of the elastic cylinder (861).

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