Hydraulic steering gear with dynamic load sensing function

Abstract

The hydraulic steering gear with the dynamic load sensing function comprises a hydraulic steering gear shell, an oil inlet is formed in the top of the hydraulic steering gear shell, an oil return opening is formed in the top of the hydraulic steering gear shell, and two oil outlets are symmetrically formed in the top of the hydraulic steering gear shell; the two oil outlets are connected with a hydraulic oil cylinder of the automobile hydraulic steering system through hoses correspondingly, the two oil outlets communicate with two cavities of the hydraulic oil cylinder correspondingly, and load detection assemblies are arranged in the two oil outlets and comprise rotating grooves formed in the sides, away from each other, of the two oil outlets. According to the hydraulic steering gear, the annular plate is rotationally installed on the inner side of the rotating groove, when the annular plate rotates, the wireless miniature pressure sensor on the annular plate can be rotated into the oil outlet, the hydraulic pressure in the oil outlet is detected, and therefore the dynamic load is monitored in real time.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic steering technology, specifically a hydraulic steering system with dynamic load sensing function. Background Technology

[0002] A hydraulic steering system typically includes one inlet, one return port, and two outlets. The two outlets are connected to different chambers of the steering cylinder. By controlling the direction and flow rate of the oil at the two outlets, the steering cylinder is propelled, thus assisting in the rotation of the steering wheel. For example, in the hydraulic steering systems of some mining trucks, both the front and rear fully hydraulic steering systems have one inlet, one return port, and two outlets. The two outlets are connected to the front and rear steering cylinders respectively to achieve the vehicle's steering function. However, the following drawbacks exist during use: When steering the wheels in different environments, it is necessary to detect the dynamic load of inconvenient steering in real time. When the load is large, it can easily cause damage to the vehicle steering system. If the overload behavior in the dynamic load cannot be captured in time, it can easily affect the subsequent safe use of the vehicle. Summary of the Invention

[0003] In view of the above situation and to overcome the shortcomings of the prior art, the present invention provides a hydraulic steering gear with dynamic load sensing function, which effectively solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic steering gear with dynamic load sensing function, comprising a hydraulic steering gear housing, wherein an oil inlet is provided at the top of the hydraulic steering gear housing, an oil return port is provided at the top of the hydraulic steering gear housing, and two oil outlets are symmetrically provided at the top of the hydraulic steering gear housing. The two oil outlets are respectively connected to the hydraulic cylinders of the automotive hydraulic steering system through hoses, and the two oil outlets are respectively connected to two cavities of the hydraulic cylinders. Load detection components are provided in the two oil outlets. The load detection component includes a rotating groove opened on one side of two oil outlets that are far apart from each other. Rotating boxes are symmetrically installed on both sides of the hydraulic steering gear housing. The two rotating boxes are symmetrically arranged on one side of the two rotating grooves that are far apart from each other. The rotating grooves and rotating boxes are combined to form a large semi-circular cavity. The large semi-circular cavity is connected to the oil outlet. A rotating detection element is rotatably installed in the large semi-circular cavity. The rotation detection component includes an annular plate set in a large semi-circular cavity. A mounting bracket is fixedly installed on the inner side of the center of the annular plate. A wireless miniature pressure sensor is bolted to the mounting bracket. The wireless miniature pressure sensor is located inside the oil outlet. Filter holes are evenly opened in the upper and lower areas of the wireless miniature pressure sensor on the annular plate.

[0005] Preferably, the outer wall of the annular plate is in close contact with the inner wall of the semi-circular cavity, two shaft blocks are coaxially arranged on the inner side of the annular plate, and connecting rods are symmetrically installed on the outer side of the shaft blocks. The connecting rods are fixedly connected to the annular plate, and a rubber sealing block is provided between the shaft blocks and the annular plate. One end of the shaft block is connected to a rotation control component.

[0006] Preferably, the rubber sealing block has symmetrical arc-shaped grooves on both sides, and the arc of the arc-shaped grooves is the same as the arc of the inner wall of the oil outlet. The rubber sealing block has two symmetrical mounting grooves inside, and the two shaft blocks are respectively installed in the two mounting grooves. The upper and lower sides of the mounting grooves have symmetrical rod grooves, and the connecting rod is located in the rod groove. The inner wall of the mounting groove is in close contact with the outer wall of the shaft block, and the outer wall of the rubber sealing block is in close contact with the inner wall of the annular plate.

[0007] Preferably, a detection port is provided on one side of the rotating box, and a baffle is bolted to the detection port to close the detection port.

[0008] Preferably, the rotation control assembly includes two fixed sleeves symmetrically installed on one side of the hydraulic steering gear housing. The two fixed sleeves are coaxially arranged with the shaft blocks in the two rotation slots respectively. A rotating shaft is fixedly installed at the end of the shaft block near the fixed sleeve. The rotating shaft is rotatably installed inside the fixed sleeve. A gear is provided at the end of the rotating shaft away from the shaft block. A pressure sealing assembly is provided between the rotating shaft and the gear.

[0009] Preferably, the two gears are meshed with racks on their adjacent sides, and a fixing box is provided between the two racks. The fixing box is fixedly installed on the hydraulic steering gear housing. A sliding groove is provided on the fixing box, and a sliding plate is slidably installed inside the sliding groove. The sliding plate is fixedly connected to the two racks. A screw is rotatably installed inside the sliding groove. The screw is threadedly connected to the sliding plate and fixedly connected to the output shaft of the drive motor. The drive motor is fixedly installed at the bottom of the fixing box.

[0010] Preferably, the compression sealing assembly includes a movable cavity opened inside the rotating shaft, a piston rod is movably installed inside the movable cavity, a spring is fixedly installed at one end of the piston rod near the shaft block, one end of the spring is fixedly connected to the inner wall of the end of the movable cavity, guide grooves are symmetrically opened on the side wall of the movable cavity along the length direction of the rotating shaft, guide blocks are symmetrically installed on the piston rod, the guide blocks are slidably connected to the guide grooves, and a push rod is fixedly installed at the end of the piston rod away from the shaft block, one end of the push rod extends to the outside of the rotating shaft, and one end of the push rod is coaxially fixedly connected to the gear.

[0011] Preferably, a pressure block is fixedly installed on the side of the gear away from the shaft block, and air nozzles are symmetrically installed at both ends of the rack, with the two air nozzles located on the upper and lower sides of the pressure block, respectively.

[0012] Preferably, a central groove is provided between the two mounting grooves. The diameter of the central groove is larger than that of the mounting groove. A central airbag is installed inside the central groove. The outer wall of the central airbag is in close contact with the inner wall of the central groove. An air nozzle is installed at one end of the central airbag near the rotating shaft. One end of the air nozzle passes through the inside of the shaft block and enters the interior of the movable cavity.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention uses a ring plate that is rotatably installed inside a rotating groove. When the ring plate rotates, the wireless miniature pressure sensor on the ring plate can be rotated into the oil outlet to detect the hydraulic pressure in the oil outlet, thereby enabling real-time monitoring of dynamic load. After the wireless miniature pressure sensor is rotated into the rotating box, it can be disassembled and maintained for easy use. 2. In this invention, a rubber sealing block is installed on the inner side of the annular plate. The arc-shaped grooves on both sides of the rubber sealing block are adapted to the inner wall of the oil outlet. This allows the rubber sealing block to isolate the oil outlet and the rotating box when the annular plate rotates to two states, preventing hydraulic oil from entering the rotating box. This facilitates use and ensures that the original flow path diameter of the oil outlet remains unchanged. 3. In this invention, filter holes are evenly opened on both the upper and lower sides of the annular plate of the wireless micro pressure sensor. When the part of the annular plate where the wireless micro pressure sensor is located is inside the oil outlet, the hydraulic oil can flow normally through the filter holes. Impurities in the hydraulic oil are blocked by the annular plate, which prevents impurities from impacting the wireless micro pressure sensor and causing damage to the wireless micro pressure sensor or reducing the accuracy of pressure detection. 4. In this invention, the longitudinal movement of the rack drives the rotation of the annular plate, thereby enabling the movement of the wireless miniature pressure sensor. When the sensor moves to one of two states, the air nozzle at the end of the rack exerts pressure on the pressure block at the end of the gear, pushing the piston rod toward the central air bladder. This increases the internal air pressure of the central air bladder, generating pressure from the inside out on the rubber sealing block. This causes the rubber sealing block to deform, pressing the outer wall of the rubber sealing block against the inner wall of the rotating groove, further improving the sealing effect between the oil outlet and the rotating box during operation. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0015] In the attached diagram: Figure 1 This is a schematic diagram of a hydraulic steering system with dynamic load sensing function according to the present invention; Figure 2 This is a schematic diagram of the load detection component structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the rotating groove of the present invention; Figure 4 This is a schematic diagram of the rotation detection element of the present invention; Figure 5 This is a schematic diagram of the compression sealing assembly structure of the present invention; Figure 6 This is a schematic diagram of the annular plate structure of the present invention; Figure 7 This is a schematic diagram of the rubber sealing block structure of the present invention; Figure 8 This is a schematic diagram of the fixed box structure of the present invention.

[0016] In the diagram: 1. Hydraulic steering gear housing; 2. Oil inlet; 3. Oil return port; 4. Oil outlet; 5. Load detection component; 501. Rotating groove; 502. Rotating box; 503. Detection port; 504. Baffle; 505. Rotation detection component; 5051. Shaft block; 5052. Annular plate; 5053. Connecting rod; 5054. Filter hole; 5055. Mounting bracket; 5056. Wireless miniature pressure sensor; 5057. Rubber sealing block; 5058. Arc groove; 5059. Rod groove; 505 10. Mounting slot; 6. Rotation control assembly; 601. Fixing sleeve; 602. Rotating shaft; 603. Gear; 604. Rack; 605. Fixing box; 606. Sliding groove; 607. Sliding plate; 608. Screw; 609. Drive motor; 7. Pressing and sealing assembly; 701. Pressure block; 702. Movable cavity; 703. Piston column; 704. Push rod; 705. Guide groove; 706. Guide block; 707. Spring; 708. Central groove; 709. Central airbag; 710. Air nozzle. Detailed Implementation

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

[0018] Example 1, by Figure 1-8This invention relates to a hydraulic steering system with dynamic load sensing function, comprising a hydraulic steering system housing 1, an oil inlet 2 and an oil return port 3 on the top of the hydraulic steering system housing 1, and two symmetrical oil outlets 4 on the top of the hydraulic steering system housing 1. The two oil outlets 4 are connected to the hydraulic cylinders of the vehicle's hydraulic steering system via hoses, and the two oil outlets 4 are respectively connected to two chambers of the hydraulic cylinders. By controlling the position of the valve core inside the hydraulic steering system housing 1, the oil outlets 4 for oil delivery are controlled. When hydraulic oil enters one of the oil chambers from one oil outlet 4, it pushes the internal piston to one side. When hydraulic oil enters the other oil chamber from the other oil outlet 4, it pushes the internal piston to the other side, thereby realizing vehicle steering. A load detection component 5 is provided in the two oil outlets 4.

[0019] The load detection component 5 includes a rotating groove 501 located on one side of the two oil outlets 4 that are far apart from each other. Rotating boxes 502 are symmetrically installed on both sides of the hydraulic steering gear housing 1. The two rotating boxes 502 are symmetrically arranged on the side of the two rotating grooves 501 that are far apart from each other. The rotating grooves 501 and rotating boxes 502 combine to form a large semi-circular cavity. The large semi-circular cavity is connected to the oil outlets 4. A rotating detection element 505 is rotatably installed in the large semi-circular cavity. A detection port 503 is opened on one side of the rotating box 502. A baffle 504 is bolted to the detection port 503. The baffle 504 closes the detection port 503. When the baffle 504 is removed, the detection port 503 is opened for easy maintenance.

[0020] The rotation detection component 505 includes an annular plate 5052 disposed within a large semi-circular cavity. A mounting bracket 5055 is fixedly installed on the inner side of the center of the annular plate 5052. A wireless miniature pressure sensor 5056 is bolted to the mounting bracket 5055. The wireless miniature pressure sensor 5056 is located inside the oil outlet 4. Filter holes 5054 are evenly distributed on the annular plate 5052 in the upper and lower regions of the wireless miniature pressure sensor 5056. When the portion of the annular plate 5052 containing the wireless miniature pressure sensor 5056 is located inside the oil outlet 4, hydraulic oil can flow normally through the filter holes 5054, while impurities in the hydraulic oil are blocked by the annular plate 5052, preventing impurities from impacting the wireless miniature pressure sensor 5056 and causing damage to it. The outer wall of the annular plate 5052 is tightly attached to the inner wall of the semi-circular cavity. Two shaft blocks 5051 are coaxially arranged on the inner side of the annular plate 5052. Connecting rods 5053 are symmetrically installed on the outer side of the shaft blocks 5051. The connecting rods 5053 are fixedly connected to the annular plate 5052. A rubber sealing block 5057 is provided between the shaft blocks 5051 and the annular plate 5052. The annular plate 5052 is rotatably installed inside the rotating groove 501. When the annular plate 5052 rotates, the wireless miniature pressure sensor 5056 on the annular plate 5052 can be rotated into the oil outlet 4 to detect the hydraulic pressure in the oil outlet 4, thereby monitoring the dynamic load in real time. After the wireless miniature pressure sensor 5056 is rotated into the rotating box 502, it can be disassembled and maintained for easy use. One end of the shaft block 5051 is connected to the rotation control component 6.

[0021] The rubber sealing block 5057 has symmetrically formed arc-shaped grooves 5058 on both sides, and the curvature of the arc-shaped grooves 5058 is the same as the curvature of the inner wall of the oil outlet 4. The rubber sealing block 5057 has two symmetrically formed mounting grooves 50510 inside, and the two shaft blocks 5051 are respectively installed in the two mounting grooves 50510. The mounting grooves 5059 are symmetrically formed on the upper and lower sides of the mounting grooves 50510, and the connecting rod 5053 is located in the rod grooves 5059. The inner wall of the mounting groove 50510 is in close contact with the outer wall of the shaft block 5051. The outer wall of the rubber sealing block 5057 is in close contact with the inner wall of the annular plate 5052. The rubber sealing block 5057 is installed on the inner side of the annular plate 5052. The arc-shaped grooves 5058 on both sides of the rubber sealing block 5057 are adapted to the inner wall of the oil outlet 4, so that when the annular plate 5052 rotates to the two states, the rubber sealing block 5057 can isolate the oil outlet 4 and the rotating box 502, preventing hydraulic oil from entering the rotating box 502, facilitating use, and ensuring that the original flow path diameter of the oil outlet 4 remains unchanged.

[0022] The rotation control assembly 6 includes two fixed sleeves 601 symmetrically mounted on one side of the hydraulic steering gear housing 1. The two fixed sleeves 601 are coaxially arranged with shaft blocks 5051 in two rotation slots 501. A rotating shaft 602 is fixedly mounted at the end of the shaft block 5051 closest to the fixed sleeve 601. The rotating shaft 602 is rotatably mounted inside the fixed sleeve 601. A gear 603 is provided at the end of the rotating shaft 602 away from the shaft block 5051. A pressure sealing assembly 7 is provided between the rotating shaft 602 and the gear 603. Racks 604 are meshed on the sides of the two gears 603 that are close to each other. A fixed housing 605 is provided between the two racks 604. 5 is fixedly installed on the hydraulic steering gear housing 1. The fixed box 605 has a sliding groove 606. A sliding plate 607 is slidably installed inside the sliding groove 606. The sliding plate 607 is fixedly connected to two racks 604. A screw 608 is rotatably installed inside the sliding groove 606. The screw 608 is threadedly connected to the sliding plate 607. The screw 608 is fixedly connected to the output shaft of the drive motor 609. The drive motor 609 is fixedly installed at the bottom of the fixed box 605. The rack 604 moves longitudinally. Since the rack 604 is meshed with the gear 603, it drives the annular plate 5052 to rotate, thereby realizing the movement of the wireless miniature pressure sensor 5056.

[0023] The compression sealing assembly 7 includes a movable cavity 702 formed inside the rotating shaft 602. A piston rod 703 is movably mounted inside the movable cavity 702. A spring 707 is fixedly mounted on one end of the piston rod 703 near the shaft block 5051. One end of the spring 707 is fixedly connected to the inner wall of the end of the movable cavity 702. Guide grooves 705 are symmetrically formed on the side wall of the movable cavity 702 along the length of the rotating shaft 602. Guide blocks 706 are symmetrically mounted on the piston rod 703. Block 706 is slidably connected to guide groove 705. A push rod 704 is fixedly installed at the end of piston rod 703 away from shaft block 5051. One end of push rod 704 extends through to the outside of rotating shaft 602, and one end of push rod 704 is coaxially fixedly connected to gear 603. A pressure block 701 is fixedly installed on the side of gear 603 away from shaft block 5051. Air nozzles 710 are symmetrically installed at both ends of rack 604. The two air nozzles 710 are located on the upper and lower sides of pressure block 701, respectively. On the side, a central groove 708 is formed between the two mounting grooves 50510. The diameter of the central groove 708 is larger than that of the mounting grooves 50510. A central airbag 709 is installed inside the central groove 708. The outer wall of the central airbag 709 is in close contact with the inner wall of the central groove 708. An air nozzle 710 is installed at one end of the central airbag 709 near the rotating shaft 602. One end of the air nozzle 710 passes through the inside of the shaft block 5051 and enters the interior of the movable cavity 702. When moving to the two states... The air nozzle 710 at the end of the rack 604 exerts pressure on the pressure block 701 at the end of the gear 603, pushing the piston rod 703 toward the central air bladder 709. This increases the internal air pressure of the central air bladder 709, generating pressure from the inside out on the rubber sealing block 5057. This causes the rubber sealing block 5057 to deform, pressing the outer wall of the rubber sealing block 5057 against the inner wall of the rotating groove 501, further improving the sealing effect between the oil outlet 4 and the rotating box 502 during operation.

[0024] Working principle: During operation, the position of the valve core inside the hydraulic steering gear housing 1 is controlled to control the oil outlet 4 for oil delivery. The two oil outlets 4 are connected to the two oil chambers of the hydraulic steering cylinder in the vehicle steering system through hoses. When hydraulic oil enters one oil chamber from one oil outlet 4, it pushes the internal piston to move to one side. When hydraulic oil enters the other oil chamber from the other oil outlet 4, it pushes the internal piston to move to the other side, thereby realizing vehicle steering. When dynamic load detection is required, the annular plate 5052 is rotated so that the wireless micro pressure sensor 5056 is located inside the oil outlet 4, enabling the wireless micro pressure sensor 5056 to monitor the hydraulic pressure inside the oil outlet 4 in real time, thereby realizing the detection of dynamic load. The annular plate 5052 has filter holes 5054 in the areas above and below the wireless micro pressure sensor 5056, which can block impurities in the hydraulic oil and prevent impurities from impacting the wireless micro pressure sensor 5056, thus causing inaccurate detection results. When dynamic load detection is not required, the wireless micro pressure sensor 5056 is rotated into the rotating box 502. In both states, the rubber sealing block 5057 needs to be adjusted to the vertical position of the arc groove 5058 so that the arc groove 5058 matches the inner wall of the oil outlet 4. When the annular plate 5052 is rotated for adjustment, the drive motor 609 is turned on to drive the screw 608 to rotate. The screw 608 is threadedly connected to the sliding plate 607, which drives the rack 604 to move longitudinally. Since the rack 604 is meshed with the gear 603, the rotation control of the annular plate 5052 can be realized, which is convenient for testing. When it is necessary to disassemble and maintain the wireless miniature pressure sensor 5056, the annular plate 5052 is rotated to the inside of the rotating box 502, and the baffle 504 on one side of the rotating box 502 is opened. The wireless miniature pressure sensor 5056 can be disassembled and maintained from the detection port 503. When the rack 604 moves longitudinally to its two extreme positions, the annular plate 5052 rotates to the two states mentioned above. When in the extreme state, the air nozzle 710 at the end of the rack 604 exerts pressure on the pressure block 701 at the end of the gear 603, thereby pushing the piston rod 703 toward the central air bladder 709. This causes air inside the moving chamber 702 to fill the central air bladder 709, causing it to expand. Consequently, the central air bladder 709 exerts pressure from the inside out on the rubber sealing block 5057, ensuring that the rubber sealing block 5057 fits tightly against the inner wall of the rotating groove 501. This prevents hydraulic oil from entering the rotating box 502 through the gap between the rubber sealing block 5057 and the rotating groove 501 when hydraulic oil passes through, improving the sealing effect and ensuring steering stability. The sealing gasket adhered to the outer surface of the annular plate 5052 also serves a sealing function.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic steering gear with dynamic load sensing function, comprising a hydraulic steering gear housing (1), characterized in that: The top of the hydraulic steering gear housing (1) is provided with an oil inlet (2) and an oil return port (3). The top of the hydraulic steering gear housing (1) is provided with two symmetrical oil outlets (4). The two oil outlets (4) are connected to the hydraulic cylinders of the automotive hydraulic steering system through hoses, and the two oil outlets (4) are respectively connected to the two cavities of the hydraulic cylinders. Load detection components (5) are provided in the two oil outlets (4). The load detection component (5) includes a rotating groove (501) opened on one side away from each other of the two oil outlets (4). Rotating boxes (502) are symmetrically installed on both sides of the hydraulic steering gear housing (1). The two rotating boxes (502) are symmetrically arranged on one side away from each other of the two rotating grooves (501). The rotating grooves (501) and rotating boxes (502) are combined to form a large semi-circular cavity. The large semi-circular cavity is connected to the oil outlet (4). A rotating detection element (505) is rotatably installed in the large semi-circular cavity. The rotation detection component (505) includes an annular plate (5052) disposed in a large semi-circular cavity. A mounting bracket (5055) is fixedly installed on the inner side of the middle part of the annular plate (5052). A wireless miniature pressure sensor (5056) is bolted to the mounting bracket (5055). The wireless miniature pressure sensor (5056) is located inside the oil outlet (4). Filter holes (5054) are evenly opened on the annular plate (5052) in the upper and lower sides of the wireless miniature pressure sensor (5056).

2. A hydraulic steering system with dynamic load sensing function according to claim 1, characterized in that: The outer wall of the annular plate (5052) is in close contact with the inner wall of the semi-circular cavity. Two shaft blocks (5051) are coaxially arranged on the inner side of the annular plate (5052). Connecting rods (5053) are symmetrically installed on the outer side of the shaft blocks (5051). The connecting rods (5053) are fixedly connected to the annular plate (5052). A rubber sealing block (5057) is provided between the shaft blocks (5051) and the annular plate (5052). One end of the shaft block (5051) is connected to a rotation control component (6).

3. A hydraulic steering system with dynamic load sensing function according to claim 2, characterized in that: The rubber sealing block (5057) has symmetrical arc grooves (5058) on both sides. The arc of the arc groove (5058) is the same as the arc of the inner wall of the oil outlet (4). The rubber sealing block (5057) has two symmetrical mounting grooves (50510) inside. Two shaft blocks (5051) are installed in the two mounting grooves (50510) respectively. The mounting grooves (50510) have symmetrical rod grooves (5059) on the upper and lower sides. The connecting rod (5053) is located in the rod groove (5059). The inner wall of the mounting groove (50510) is in close contact with the outer wall of the shaft block (5051). The outer wall of the rubber sealing block (5057) is in close contact with the inner wall of the annular plate (5052).

4. A hydraulic steering system with dynamic load sensing function according to claim 1, characterized in that: The rotating box (502) has a detection port (503) on one side, and a baffle (504) is bolted on the detection port (503) to close the detection port (503).

5. A hydraulic steering system with dynamic load sensing function according to claim 2, characterized in that: The rotation control assembly (6) includes two fixed sleeves (601) symmetrically installed on one side of the hydraulic steering gear housing (1). The two fixed sleeves (601) are coaxially arranged with the shaft blocks (5051) in the two rotation slots (501). A rotating shaft (602) is fixedly installed at the end of the shaft block (5051) near the fixed sleeve (601). The rotating shaft (602) is rotatably installed inside the fixed sleeve (601). A gear (603) is provided at the end of the rotating shaft (602) away from the shaft block (5051). A pressure sealing assembly (7) is provided between the rotating shaft (602) and the gear (603).

6. A hydraulic steering system with dynamic load sensing function according to claim 5, characterized in that: Two gears (603) are meshed with racks (604) on their sides that are close to each other. A fixed box (605) is provided between the two racks (604). The fixed box (605) is fixedly installed on the hydraulic steering gear housing (1). A sliding groove (606) is provided on the fixed box (605). A sliding plate (607) is slidably installed inside the sliding groove (606). The sliding plate (607) is fixedly connected to the two racks (604). A screw (608) is rotatably installed inside the sliding groove (606). The screw (608) is threadedly connected to the sliding plate (607). The screw (608) is fixedly connected to the output shaft of the drive motor (609). The drive motor (609) is fixedly installed at the bottom of the fixed box (605).

7. A hydraulic steering system with dynamic load sensing function according to claim 5, characterized in that: The compression sealing assembly (7) includes a movable cavity (702) opened inside the rotating shaft (602). A piston column (703) is movably installed inside the movable cavity (702). A spring (707) is fixedly installed at one end of the piston column (703) near the shaft block (5051). One end of the spring (707) is fixedly connected to the inner wall of the end of the movable cavity (702). Guide grooves (705) are symmetrically opened on the side wall of the movable cavity (702) along the length direction of the rotating shaft (602). Guide blocks (706) are symmetrically installed on the piston column (703). The guide blocks (706) are slidably connected to the guide grooves (705). A push rod (704) is fixedly installed at one end of the piston column (703) away from the shaft block (5051). One end of the push rod (704) extends through to the outside of the rotating shaft (602), and one end of the push rod (704) is coaxially fixedly connected to the gear (603).

8. A hydraulic steering system with dynamic load sensing function according to claim 5, characterized in that: A pressure block (701) is fixedly installed on the side of the gear (603) away from the shaft block (5051), and air nozzles (710) are symmetrically installed at both ends of the rack (604). The two air nozzles (710) are located on the upper and lower sides of the pressure block (701) respectively.

9. A hydraulic steering system with dynamic load sensing function according to claim 3, characterized in that: A central groove (708) is provided between the two mounting grooves (50510). The diameter of the central groove (708) is larger than that of the mounting groove (50510). A central airbag (709) is installed inside the central groove (708). The outer wall of the central airbag (709) is in close contact with the inner wall of the central groove (708). An air nozzle (710) is installed at one end of the central airbag (709) near the rotating shaft (602). One end of the air nozzle (710) passes through the inside of the shaft block (5051) and enters the inside of the movable cavity (702).

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