A tubing joint and intelligent steering system for a vehicle

Abstract

The present application relates to the technical field of automobile steering system, particularly to an oil pipe joint and a vehicle intelligent steering system, which comprises a bent pipe component, an outer spherical shell and an inner spherical shell rotatably arranged in the outer spherical shell, and a blocking air bag arranged on the outer side surface of the inner spherical shell; a plug-in component is installed at one end of the bent pipe component, which comprises a plug-in pipe joint plug-in at one end of the inner spherical shell, a telescopic ring arranged on the plug-in pipe joint for clamping the oil pipe, and a movable annular shell arranged between the plug-in pipe joint and the inner spherical shell. By inserting the oil pipe into the plug-in pipe joint, the first slide foot on the plug-in pipe joint is driven to expand, the telescopic ring is driven to contract by the first slide foot, the oil pipe is clamped, and when the plug-in pipe joint is inserted into the inner spherical shell for locking, the annular shell is also moved between the plug-in pipe joint and the inner spherical shell, the telescopic ring is locked, and the control member of the air bag is exposed, which is convenient for the user to seal the gap after rotating the angle of the bent pipe component.

Description

Technical Field

[0001] This invention relates to the field of automotive steering system technology, and in particular to an oil pipe connector and a vehicle intelligent steering system. Background Technology

[0002] Traditional wide-body dump trucks generally use mechanical hydraulic power steering, which suffers from low single-axle load capacity, high failure rate, and heavy steering. Modern wide-body dump trucks are mostly diesel-powered, employing a fully hydraulic steering system powered by a hydraulic pump directly mounted on the engine's power take-off. The hydraulic oil flow supplied by the pump depends on engine speed; insufficient oil supply and heavy steering occur at engine idle or low speeds, requiring manual driving. Mining operations operate 24 hours a day, requiring at least two drivers per truck, resulting in high labor costs, harsh working conditions, and safety hazards due to prolonged driver fatigue.

[0003] Existing steerable hydraulic steering systems used in wide-body autonomous dump trucks employ a steerable motor mounted at the junction of the steering gear and steering column. The motor acts directly on the column, which in turn is directly connected to the steering wheel. The control signal input is connected to the control signal output of the electronic control unit via a wiring harness. The motor's torque fluctuations and the mechanical transmission mechanism of the steering column suffer from significant delays, poor accuracy, and even, in severe cases, jamming. Therefore, it is essential to provide a steerable hydraulic steering system for wide-body dump trucks that offers high control accuracy, fast response, and broad applicability to autonomous driving systems. Furthermore, during the installation of oil pipes and connectors, some connectors require bends due to their location to ensure proper connection; otherwise, the oil pipes are prone to bending, leading to poor flow. Therefore, a steerable pipe connector capable of various angle adjustments is required. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problem in the above or existing technology that when installing oil pipes and connectors, some connectors need to be connected to the connectors by bending pipes due to their location, otherwise the oil pipes are easily bent and the flow is not smooth, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide an oil pipe connector.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an oil pipe joint, including a bending component, comprising an outer spherical shell and an inner spherical shell rotatably disposed inside the outer spherical shell, wherein a sealing airbag is provided on the outer surface of the inner spherical shell.

[0008] A connector, installed at one end of the bend component, includes a connector end that inserts into one end of the inner spherical shell. The connector end is provided with a telescopic ring for clamping the oil pipe. A movable annular shell is also provided between the connector end and the inner spherical shell.

[0009] A threaded component, installed at one end of the bent tube component, includes a threaded tube threaded to one end of the outer spherical shell, and a threaded ring threaded between the outer spherical shell and the threaded tube.

[0010] As a preferred embodiment of the oil pipe connector of the present invention, the insertion pipe connector includes a docking part and an insertion part. The end face of the docking part is provided with a plurality of first grooves at equal intervals in an annular shape. The telescopic ring includes a plurality of outer rings and an inner ring. The outer rings and the inner rings are inserted into each other end to end. The end face of each outer ring is provided with a first protrusion. The first protrusion slides along the first groove.

[0011] As a preferred embodiment of the oil pipe connector of the present invention, the outer wall of the insertion part is provided with a plurality of second grooves at equal intervals in an annular shape, each second groove is located inside the inner ring, and a first sliding foot is slidably provided in each second groove, and the depth of the second groove gradually decreases along the direction toward the docking part.

[0012] In a preferred embodiment of the oil pipe connector of the present invention, the mating part has a cavity inside, a turntable is rotatably arranged inside the cavity, and a first limiting groove and a second limiting groove are sequentially arranged on the turntable from the inside to the outside. There are multiple second limiting grooves, and a first protrusion is slidably connected in each second limiting groove. A second protrusion is provided on the end face of the first sliding foot, and the second protrusion slides along the first limiting groove. Both the first limiting groove and the second limiting groove are inclined.

[0013] As a preferred embodiment of the oil pipe connector of the present invention, the end face of the mating part is provided with a plurality of pins evenly spaced in an annular shape, one end of the inner spherical shell is provided with a first end, the end face of the first end is provided with an annular groove, and a notch is provided on the annular groove, the pin is inserted into the annular groove along the notch and engages with the annular groove.

[0014] As a preferred embodiment of the oil pipe connector of the present invention, the inner wall of the annular shell is provided with a second sliding foot, the outer wall of the first end is provided with a first strip groove, the outer wall of the mating part is provided with a second strip groove, the second sliding foot slides along the first strip groove and the second strip groove, a lever is rotatably provided in the cavity, one end of the lever rotates in the cavity of the second sliding foot, and the other end is squeezed by the pin.

[0015] In a preferred embodiment of the oil pipe connector of the present invention, the outer wall of the inner spherical shell is provided with an annular receiving groove, the air bladder is located in the receiving groove, the air bladder is connected to the air chamber opened in the first end through an air pipe, a piston plate and a return spring are slidably arranged in the air chamber, a first one-way valve is provided on the piston plate, a second one-way valve is provided inside the first one-way valve, the first one-way valve and the second one-way valve are in opposite directions, a circular hole is opened on the annular shell, a rod is provided on the piston plate, and the rod passes through the circular hole.

[0016] As a preferred embodiment of the oil pipe connector of the present invention, the inner part of the mating part is further provided with a cavity, the cavity is connected to the cavity, the front end of the second protrusion is located in the cavity, and a spring pin is provided at the upper end of the cavity. The second protrusion is provided with a insertion hole, and the spring pin is inserted into the insertion hole.

[0017] The beneficial effects of the oil pipe connector of the present invention are as follows: The present invention inserts an oil pipe into a plug connector, drives the first sliding foot on the plug connector to expand the first sliding foot, and the first sliding foot drives the telescopic ring to contract, clamping the oil pipe. At the same time, when the plug connector is inserted into the inner spherical shell for locking, it also drives the annular shell to move between the two to lock the telescopic ring, and exposes the control components of the airbag, making it convenient for the user to seal the gap after rotating the angle of the bend component.

[0018] In actual use, there are still problems such as torque fluctuation of the motor and large delay, poor accuracy, and even jamming of the mechanical transmission mechanism of the steering column.

[0019] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: a vehicle intelligent steering system, including an oil pipe joint and a steering control component, including a front axle and a power steering cylinder mounted on the front axle, the power steering cylinder being connected to the steering valve assembly via an oil pipe, the steering valve assembly being connected to the safety filter valve assembly via an oil pipe, the safety filter valve assembly being connected to the steering motor pump and the hydraulic oil tank via oil pipes respectively, and the steering motor pump being connected to the hydraulic oil tank.

[0020] As a preferred embodiment of the intelligent steering system for vehicles of the present invention, wherein:

[0021] The beneficial effects of the intelligent vehicle steering system of the present invention are as follows:

[0022] 1. The fully hydraulic steering system adopted in this invention eliminates the mechanical connection between the steering wheel and the steering trapezoid, replacing it with hydraulic lines, which has the advantages of easy and flexible operation, compact structure, and easy installation and layout.

[0023] 2. This invention uses a constant-speed electric steering gear pump to provide power, which can reduce the pump displacement and provide a more stable power source than the traditional diesel vehicle hydraulic pump installed on the engine power take-off.

[0024] 3. The steering fluid filling valve group and accumulator used in this invention to supply oil to the steering gear improve the stability of the vehicle when turning quickly and can realize the emergency steering function. In the event of a sudden failure of the power source, the accumulator provides a temporary hydraulic source for the steering system, avoiding safety accidents caused by the vehicle losing power and being unable to turn due to emergency braking. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0026] Figure 1 A schematic diagram of the oil pipe joint. Figure 1 .

[0027] Figure 2 A schematic diagram of the oil pipe joint. Figure 2 .

[0028] Figure 3 This is a top view of the oil pipe joint.

[0029] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction.

[0030] Figure 5 This is a schematic diagram of the cross-sectional structure of the turntable.

[0031] Figure 6 for Figure 4 Enlarged schematic diagram of the structure at point B.

[0032] Figure 7 for Figure 4 Enlarged schematic diagram of the structure at point C.

[0033] Figure 8 for Figure 6 Enlarged schematic diagram of the structure at point D.

[0034] Figure 9 for Figure 6 Enlarged schematic diagram of the structure at point E in the middle.

[0035] Figure 10 A schematic diagram of the vehicle's intelligent steering system Figure 1 .

[0036] Figure 11 A schematic diagram of the vehicle's intelligent steering system Figure 2 .

[0037] Figure 12 A schematic diagram of the vehicle's intelligent steering system Figure 3 . Detailed Implementation

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0041] Example 1

[0042] Reference Figure 1-4 This is the first embodiment of the present invention. This embodiment provides an oil pipe connector, including a bend component 100, including an outer spherical shell 101 and an inner spherical shell 102 rotatably disposed inside the outer spherical shell 101, and a sealing airbag 103 is provided on the outer side of the inner spherical shell 102. A plug-in component 200 is installed at one end of the bend component 100, which includes a plug end 201 plugged into one end of the inner spherical shell 102. A telescopic ring 202 is provided on the plug end 201 for clamping the oil pipe. A movable annular shell 104 is also provided between the plug end 201 and the inner spherical shell 102. A screw component 300 is installed at one end of the bend component 100, which includes a screw tube 301 screwed into one end of the outer spherical shell 101, and a threaded ring 302 screwed between the outer spherical shell 101 and the screw tube 301.

[0043] In this embodiment, the oil pipe is inserted into the connector 201, and the first sliding foot 203 on the connector 201 is driven to expand. The first sliding foot 203 drives the telescopic ring 202 to contract, clamping the oil pipe. At the same time, when the connector 201 is inserted into the inner spherical shell 102 for locking, it also drives the annular shell 104 to move between the two, locking the telescopic ring 202 and exposing the control components of the airbag 103, so that the user can seal the gap after rotating the angle of the bend component 100.

[0044] Example 2

[0045] Reference Figures 3-9 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides an oil pipe connector. The insertion connector 201 includes a mating portion 201a and an insertion portion 201b. The end face of the mating portion 201a has a plurality of first grooves 201a-1 spaced evenly in an annular pattern. The telescopic ring 202 includes a plurality of outer rings 202a and an inner ring 202b, which are interlocked end-to-end. Each outer ring 202a has a first protrusion 202a-1 on its end face, which slides along the first groove 201a-1. The outer wall of the insertion portion 201b has a plurality of second grooves 201b-1 spaced evenly in an annular pattern. Each second groove 201b-1 is located inside the inner ring 202b, and a first sliding foot 203 is slidably disposed within each second groove 201b-1. The depth of the second grooves 201b-1 gradually decreases towards the mating portion 201a.

[0046] It should be noted that the outer ring 202a and the inner ring 202b are in one-to-one correspondence and interlock to form a ring. The end face of the outer ring 202a slides along the first groove 201a-1 through the first protrusion 202a-1. On the one hand, the telescopic ring 202 can be installed on the end face of the docking part 201a. On the other hand, the contraction or expansion of the telescopic ring 202 can be limited by the first groove 201a-1 to ensure that the outer ring 202a tightly clamps the outer wall of the oil pipe. In conjunction with the first sliding foot 203, the oil pipe is squeezed and clamped from the inside. Since the first sliding foot 203 is located at the inner ring 202b, the first sliding foot 203 squeezes the oil pipe towards the inner ring 202b, so that the oil pipe is clamped and the entire oil pipe is also clamped and deformed, realizing a tight connection between the connector 201 and the oil pipe.

[0047] As the depth of the second groove 201b-1 gradually decreases towards the docking part 201a, when the first sliding foot 203 moves along the second groove 201b-1 towards the docking part 201a, the second sliding foot 104a slowly moves outward, pushing the oil pipe portion located at the inner ring 202b outward, causing the oil pipe to expand. Thus, the oil pipe is tightly clamped from both the inner and outer sides. At the same time, due to the thickness difference between the outer ring 202a and the inner ring 202b, the oil pipe will be squeezed and deformed, further achieving the clamping of the oil pipe.

[0048] The docking part 201a has a cavity 201a-2 inside, and a turntable 204 is rotatably arranged inside the cavity 201a-2. The turntable 204 has a first limiting groove 204a and a second limiting groove 204b arranged sequentially from the inside to the outside. There are multiple second limiting grooves 204b, and a first protrusion 202a-1 is slidably connected in each second limiting groove 204b. The end face of the first sliding foot 203 is provided with a second protrusion 203a. The second protrusion 203a slides along the first limiting groove 204a. Both the first limiting groove 204a and the second limiting groove 204b are set to be inclined.

[0049] It should be noted that the turntable 204 has a ring of multiple second limiting grooves 204b on its outer side and a first limiting groove 204a on its inner side. When the second protrusion 203a moves vertically in the first limiting groove 204a, the turntable 204 is simultaneously mounted in the cavity 201a-2 via bearings. The turntable 204 with the first limiting groove 204a installed will rotate. The rotation of the turntable 204 will drive the multiple second limiting grooves 204b on its surface to rotate as well. The rotation of the second limiting grooves 204b will drive the first protrusion 202a-1 located inside it to move as well. The outer ring 202a end face of the telescopic ring 202 is provided with the first protrusion 202a-1. The first protrusion 202a-1 also slides vertically along the first groove 201a-1. Under the double constraint, the telescopic ring 202 will synchronously contract or expand.

[0050] In this embodiment, the oil pipe is first inserted into the outer wall of the insertion part 201b, and the oil pipe is sleeved on the outside of each first sliding foot 203. As the oil pipe continues to be inserted, each first sliding foot 203 moves along the second groove 201b-1 towards the docking part 201a. As the second groove 201b-1 gradually becomes shallower, each first sliding foot 203 gradually moves outward, pushing the oil pipe outward from the inside. At the same time, the second protrusion 203a located at the end of the first sliding foot 203 slides into the straight first limiting groove 204a. With the cooperation of the inclined first limiting groove 204a, the turntable 204 with the first limiting groove 204a is pushed to rotate. The rotation of the turntable 204 The second limiting groove 204b on the surface is rotated, and each second limiting groove 204b drives each first protrusion 202a-1 to rotate. At the same time, the first protrusion 202a-1 can only slide vertically in the first groove 201a-1. Thus, the first protrusion 202a-1 drives the fixed outer ring 202a to descend, and each outer ring 202a retracts towards the middle. At the same time, each outer ring 202a drives the inner ring 202b to also be received towards the middle. The telescopic ring 202 is received towards the middle to clamp the outer wall of the oil pipe. The oil pipe is clamped from the inside by the first sliding foot 203 on the inner side and also clamped from the outside by the telescopic ring 202, thus achieving the clamping of the oil pipe.

[0051] Example 3

[0052] Reference Figures 3-9 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides an oil pipe connector, which includes a plurality of pins 205 evenly distributed in an annular pattern on the end face of the mating part 201a. One end of the inner spherical shell 102 is provided with a first end 102a. The end face of the first end 102a is provided with an annular groove 102b, and a notch is provided on the annular groove 102b. The pins 205 are inserted into the annular groove 102b along the notch and are engaged with the annular groove 102b.

[0053] It should be noted that the inner side of the annular groove 102b has multiple notches, each notch corresponding to a pin 205. Thus, when the plug-in component 200 is inserted into the first end 102a, each pin 205 first enters the annular groove 102b through the notch, and then rotates within the annular groove 102b to achieve a staggered snap-fit ​​after insertion, similar to the interface structure of a fire hydrant. This structure is easy to assemble and disassemble.

[0054] The inner wall of the annular shell 104 has a second sliding foot 104a, the outer wall of the first end 102a has a first strip groove 102a-1, the outer wall of the docking part 201a has a second strip groove 201a-3, the second sliding foot 104a slides along the first strip groove 102a-1 and the second strip groove 201a-3, and a lever plate 206 is rotatably arranged in the cavity 201a-2. One end of the lever plate 206 rotates in the cavity of the second sliding foot 104a, and the other end is squeezed by the insert 205.

[0055] It should be noted that the lever plate 206 is located in the annular groove 102b corresponding to one of the notches, and is set off to one side. When the pin 205 is inserted from the notch, it will squeeze the lever plate 206. At the same time, the rotation of the pin 205 will continue to squeeze the lever plate 206, so that it will always press the lever plate 206, causing the annular shell 104 to move between the insertion tube head 201 and the inner ball shell 102, sealing the gap between the two, and squeezing the spring pin 207 to lock the telescopic ring 202.

[0056] The docking part 201a also has a cavity 201a-4 inside, which is connected to the cavity 201a-2. The front end of the second protrusion 203a is located inside the cavity 201a-4, and a spring pin 207 is provided at the upper end of the cavity 201a-4. The second protrusion 203a has an insertion hole 203a-1, and the spring pin 207 is inserted into the insertion hole 203a-1.

[0057] It should be noted that when the first sliding foot 203 moves to the end of the second groove 201b-1, the second protrusion 203a located at the end of the first sliding foot 203 enters the cavity 201a-4 and can be inserted into the insertion hole 203a-1 by the spring pin 207. When the annular shell 104 moves between the insertion tube head 201 and the inner spherical shell 102, it squeezes the spring pin 207, causing the spring pin 207 to enter the insertion hole 203a-1 and lock the telescopic ring 202.

[0058] In this embodiment, the connector 201 with the oil pipe installed is inserted into the upper cover of the inner spherical shell 102. First, the prong 205 on the end face of the mating part 201a is aligned with the notch of the annular groove 102b on the first end face of the inner spherical shell 102. Then, the prong 205 enters the annular groove 102b along the notch and rotates at a certain angle. During the entry process, the prong 205 squeezes one end of the lever 206, and the other end of the lever 206 rotates in the inner cavity of the second sliding foot 104a of the annular shell 104, thereby driving the second sliding foot 104a to move along the first strip groove 102a-1 to the second strip groove 201a-3, thus connecting the inner spherical shell 102 with the connector 201. Locking: The second sliding foot 104a moves the annular shell 104 between the first end 102a of the inner spherical shell 102 and the mating portion 201a of the insertion pipe head 201. When the annular shell 104 moves to the outside of the spring pin 207, it compresses the spring pin 207 to descend, inserting it into the insertion hole 203a-1 of the first protrusion 202a-1, locking the first protrusion 202a-1, thereby locking the telescopic ring 202, and further locking the clamping of the oil pipe. At the same time, the circular hole 104b on the annular shell 104 communicates with the air chamber 102a-2, and inserts the rod 107 inside the air chamber 102a-2 into the circular hole 104b, facilitating the operator's control of the airbag 103. During disassembly: the rod 107 is squeezed in the reverse direction to disengage from the circular hole 104b, and the annular shell 104 is pushed in the reverse direction to achieve complete unlocking and separation.

[0059] Example 4

[0060] Reference Figures 3-9 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides an oil pipe connector. The outer wall of the inner spherical shell 102 is provided with an annular receiving groove 102c. The airbag 103 is located in the receiving groove 102c. The airbag 103 is connected to the air chamber 102a-2 opened in the first end 102a through an air pipe 103a. A piston plate 106 and a return spring 105 are slidably arranged in the air chamber 102a-2. A first one-way valve 106a is provided on the piston plate 106. A second one-way valve 106b is provided in the first one-way valve 106a. The first one-way valve 106a and the second one-way valve 106b are in opposite directions. A circular hole 104b is opened on the annular shell 104. A rod 107 is provided on the piston plate 106. The rod 107 passes through the circular hole 104b.

[0061] It should be noted that when the annular shell 104 moves between the insertion connector 201 and the inner spherical shell 102, the air chamber 102a-2 will connect with the circular hole 104b. The rod 107 will move upwards into the circular hole 104b under the action of the piston plate 106 and the return spring 105. After the inner spherical shell 102 rotates and adjusts its direction within the outer spherical shell 101, by continuously pressing the rod 107, the rod 107 drives the piston plate 106 to descend, and with the cooperation of the first one-way valve 106a, inflates the airbag 103, causing the airbag 103 to... The gap between the inner spherical shell 102 and the outer spherical shell 101 is filled to seal the inner spherical shell 102 and the outer spherical shell 101. Conversely, when it is necessary to rotate the inner spherical shell 102 and the outer spherical shell 101, the rod 107 is pulled outward. The rod 107 drives the second one-way valve 106b to open, releasing a portion of the gas in the airbag 103. Then, the rotation between the inner spherical shell 102 and the outer spherical shell 101 is performed. After the angle adjustment is completed, the rod 107 is pressed again to refill the airbag 103 and seal the inner spherical shell 102 and the outer spherical shell 101.

[0062] Example 5

[0063] Reference Figures 10-12 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a vehicle intelligent steering system, including an oil pipe joint and a steering control component 400, including a front axle 401 and a steering assist cylinder 402 mounted on the front axle 401. The steering assist cylinder 402 is connected to a steering valve assembly 403 via an oil pipe. The steering valve assembly 403 is connected to a safety filter valve assembly 404 via an oil pipe. The safety filter valve assembly 404 is connected to a steering motor pump 405 and a hydraulic oil tank 406 via oil pipes. The steering motor pump 405 is connected to the hydraulic oil tank 406.

[0064] In this embodiment, the hydraulic oil tank 406 includes a level sensor; the hydraulic oil tank 406 includes a permanent magnet synchronous motor and a gear pump; the safety filter valve assembly 404 includes a safety valve, a check valve, a high-pressure filter and a valve block, and the filter has a blockage alarm function; the steering valve assembly 403 includes a proportional directional valve, a solenoid relief valve, an unloading valve, a check valve, a pressure sensor and a valve block; and an angle sensor is mounted on the kingpin of the front axle 401.

[0065] When the vehicle is in standby mode, the steering hydraulic system is in standby mode, checking the status of each solenoid valve, valve core displacement detection, pressure sensor, and whether there are any alarm points for filter blockage. The solenoid relief valve is energized, and the oil pump is in an unloaded state; the oil pump motor runs at low speed idle.

[0066] When the vehicle is driving straight normally, the proportional valve is in the neutral position; the oil pump motor is idling; and the stroke of the power steering cylinder 402 in the front axle 401 remains unchanged.

[0067] During normal vehicle steering, the angle sensor sends a signal to the proportional servo valve amplifier to form a closed-loop control of the YV1 electromagnet. Signals from 4-20MA and 4-12MA control the left position of the proportional servo valve, while the 12-20MA signal controls the right position. In the event of a power outage, the proportional valve automatically returns to the safe position to control the hydraulic cylinder steering. The flow required for small-angle steering is provided by the accumulator. At this time, the hydraulic pump is unloaded. When the pressure is insufficient to reach the pressure sensor's set point after multiple supply cycles from the accumulator, the pressure sensor sends a signal to close the solenoid relief valve YV3. The pump motor then intervenes in the steering system to recharge the accumulator, providing energy for the next steering function. When a large-angle steering is required, the pump can be directly activated, and the hydraulic pump directly completes the steering action.

[0068] When the vehicle steering system experiences the following faults: a Level 1 fault is reported. Fault details: Hydraulic steering valve assembly 403 malfunction. This can occur when: the pressure sensor remains at a low or high pressure alarm point for an extended period; the main proportional servo valve spool displacement alarm occurs; the vehicle's electronic control system malfunctions and fails to supply power; or the temperature and liquid level sensors are involved in signal acquisition. The liquid level and liquid temperature sensors are installed on the hydraulic oil tank 406. Their control participates in the steering controller's internal operation. The liquid level sensor is set with both high and low point signals. When a signal is triggered, the instrument panel displays a Level 1 fault, indicating a low liquid level alarm; if the alarm is not resolved after a 1-minute delay, the oil pump motor stops operating. The liquid temperature sensor is set with a high temperature alarm point. When a signal is triggered, the instrument panel displays a Level 2 fault, indicating a high oil temperature alarm.

[0069] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0070] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0071] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An oil pipe fitting, characterized in that: include, The bend component (100) includes an outer spherical shell (101) and an inner spherical shell (102) rotatably disposed inside the outer spherical shell (101), and the outer side of the inner spherical shell (102) is provided with a sealing airbag (103). A plug-in component (200) is installed at one end of the bend component (100), and includes a plug-in end cap (201) that is plugged into one end of the inner spherical shell (102). The plug-in end cap (201) is provided with a telescopic ring (202) for clamping the oil pipe. A movable annular shell (104) is also provided between the plug-in end cap (201) and the inner spherical shell (102). A threaded component (300) is installed at one end of the bent tube component (100), which includes a threaded tube (301) threaded to one end of the outer spherical shell (101), and a threaded ring (302) threaded between the outer spherical shell (101) and the threaded tube (301). The insertion connector (201) includes a docking part (201a) and an insertion part (201b). The end face of the docking part (201a) is provided with a plurality of first grooves (201a-1) at equal intervals in an annular shape. The telescopic ring (202) includes a plurality of outer rings (202a) and an inner ring (202b). The outer rings (202a) and the inner rings (202b) are inserted into each other end to end. The end face of each outer ring (202a) is provided with a first protrusion (202a-1). The first protrusion (202a-1) slides along the first groove (201a-1). The outer wall of the insertion part (201b) is provided with a plurality of second grooves (201b-1) at equal intervals in a ring. Each second groove (201b-1) is located inside the inner ring (202b). A first sliding foot (203) is slidably provided in each second groove (201b-1). The depth of the second groove (201b-1) gradually decreases along the direction toward the docking part (201a). The docking part (201a) has a cavity (201a-2) inside, and a turntable (204) is rotatably arranged inside the cavity (201a-2). The turntable (204) has a first limiting groove (204a) and a second limiting groove (204b) arranged sequentially from the inside to the outside. There are multiple second limiting grooves (204b), and a first protrusion (202a-1) is slidably connected in each second limiting groove (204b). A second protrusion (203a) is provided on the end face of the first sliding foot (203). The second protrusion (203a) slides along the first limiting groove (204a). Both the first limiting groove (204a) and the second limiting groove (204b) are set to be inclined.

2. The oil pipe joint as described in claim 1, characterized in that: The end face of the docking part (201a) is provided with a plurality of pins (205) evenly distributed in an annular shape, and one end of the inner spherical shell (102) is provided with a first end. Part (102a), the end face of the first end (102a) is provided with an annular groove (102b), and the annular groove (102b) is provided with a notch, the pin (205) is inserted into the annular groove (102b) along the notch and engages with the annular groove (102b).

3. The oil pipe joint as described in claim 2, characterized in that: The inner wall of the annular shell (104) has a second sliding foot (104a), the outer wall of the first end (102a) has a first strip groove (102a-1), the outer wall of the mating part (201a) has a second strip groove (201a-3), and the second sliding foot (104a) runs along the first strip groove (102a-1) and the second strip groove (201a-3). The inner sliding mechanism is provided with a lever plate (206) rotatably disposed in the cavity (201a-2). One end of the lever plate (206) rotates in the cavity of the second sliding foot (104a), and the other end is squeezed by the insert (205).

4. The oil pipe joint as described in claim 3, characterized in that: The outer wall of the inner spherical shell (102) is provided with an annular receiving groove (102c). The airbag (103) is located in the receiving groove (102c). The airbag (103) is connected to the air chamber (102a-2) opened in the first end (102a) through an air tube (103a). A piston plate (106) and a return spring (105) are slidably arranged in the air chamber (102a-2). A first one-way valve (106a) is provided on the piston plate (106). A second one-way valve (106b) is provided in the first one-way valve (106a). The first one-way valve (106a) and the second one-way valve (106b) are in opposite directions. A circular hole (104b) is opened on the annular shell (104). A rod (107) is provided on the piston plate (106). The rod (107) passes through the circular hole (104b).

5. The oil pipe joint as described in claim 4, characterized in that: The docking part (201a) is further provided with a cavity (201a-4), which is connected to the cavity (201a-2). The front end of the second protrusion (203a) is located in the cavity (201a-4), and a spring pin (207) is provided at the upper end of the cavity (201a-4). The second protrusion (203a) is provided with a socket (203a-1), and the spring pin (207) is inserted into the socket (203a-1).

6. A vehicle intelligent steering system, characterized in that: Including the tubing fitting as described in any one of claims 1 to 5, and, The steering control unit (400) includes a front axle (401) and a power steering cylinder (402) mounted on the front axle (401). The power steering cylinder (402) is connected to a steering valve assembly (403) via an oil pipe. The steering valve assembly (403) is connected to a safety filter valve assembly (404) via an oil pipe. The safety filter valve assembly (404) is connected to a steering motor pump (405) and a hydraulic oil tank (406) via oil pipes. The steering motor pump (405) is connected to the hydraulic oil tank (406).

7. The intelligent vehicle steering system as described in claim 6, characterized in that: The hydraulic oil tank (406) includes a level sensor, a permanent magnet synchronous motor and a gear pump; the safety filter valve group (404) includes a safety valve, a check valve, a high-pressure filter and a valve block; the steering valve group (403) includes a proportional directional valve, a solenoid relief valve, an unloading valve, a check valve, a pressure sensor and a valve block; and the front axle (401) has an angle sensor mounted on its kingpin.

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