An adaptive automobile electric power steering structure

Abstract

The present invention belongs to the technical field of power steering, and specifically relates to an adaptive automobile electric power steering structure, including a steering auxiliary housing and a steering rocker arm connected to the steering wheel steering shaft, a liquid plug is fixedly installed on the outer surface of the other side of the middle of the steering straight tie rod, a threaded pipe shaft is sleeved on the outer surface of the middle of the steering straight tie rod, and a double-position relief cylinder is fixedly installed on one side of the threaded pipe shaft and located inside the open shell; both ends of the threaded pipe shaft are provided with a sealing structure, and the outer side of the double-position relief cylinder is provided with an oil leakage prompt structure, and the ends of the two oil guide pipes close to the double-position relief cylinder are equipped with ball core air valves, and the end of the oil replenishment port is fixedly installed with an anti-overflow valve by bolts, and the end of the anti-overflow valve away from the oil replenishment port is screwed with an oil replenishment cap. The present invention can weaken the influence of external forces on internal parts, has a sealing structure for convenient repair work, and can also facilitate the discovery of oil leakage and the replenishment of power oil.

Description

Technical Field

[0001] The invention belongs to the technical field of power steering devices, and in particular relates to an adaptive automobile electric power steering device structure. Background Art

[0002] The automotive electric power steering is a power steering system that uses an electric motor to provide auxiliary torque. The following is a detailed introduction to the automotive electric power steering: When the driver turns the steering wheel, the torque sensor detects the torque change of the steering shaft and converts this information into an electrical signal and transmits it to the ECU. The ECU calculates the required motor power assistance based on the signals from the vehicle speed sensor and torque sensor, and controls the motor to output the corresponding power assistance torque, which is amplified by the reduction mechanism and acts on the mechanical steering gear to assist the driver in overcoming steering resistance.

[0003] Problems with existing technologies:

[0004] When the electric power steering is in use, when the car passes through a bumpy road, the vibration force will be directly transmitted to the steering straight tie rod, and the screw, solenoid and gear in the steering gear that have a transmission relationship with the steering straight tie rod will cause friction due to the vibration force. As time goes by, the degree of wear will gradually increase, seriously shortening the service life of the parts. Therefore, there is an urgent need for a power steering device that can weaken the impact of the vibration force on the internal structure. Summary of the invention

[0005] The purpose of the present invention is to provide an adaptive automobile electric power steering structure, which can weaken the influence of external forces on internal parts, has a sealing structure for convenient repair work, and can also facilitate the detection of oil leakage and the replenishment of power steering oil.

[0006] The technical solution adopted by the present invention is as follows:

[0007] An adaptive automobile electric power steering structure, comprising a steering assist housing and a steering rocker arm drivingly connected to a steering wheel steering shaft, the steering assist housing being fixedly installed inside a vehicle frame by bolts, a steering straight pull rod being assembled in a through-type sliding manner inside the steering assist housing, an opening housing being integrally provided on one side of the steering assist housing, a meshing section being integrally provided on one side of the middle of the steering straight pull rod, a liquid plug being fixedly installed on the outer surface of the other side of the middle of the steering straight pull rod, a threaded pipe shaft being sleeved on the outer surface of the middle of the steering straight pull rod, and a double-position relief oil cylinder being fixedly provided on one side of the threaded pipe shaft and located inside the opening housing;

[0008] Both ends of the threaded pipe shaft are provided with sealing structures, the outer side of the double-position relief oil cylinder is provided with an oil leakage prompt structure, the ends of the two oil guide pipes close to the double-position relief oil cylinder are equipped with ball core air valves, the corners of the two oil guide pipes are integrally connected with oil replenishment ports, and the ends of the oil replenishment ports are fixed with anti-overflow valves by bolts, and the ends of the anti-overflow valves away from the oil replenishment ports are screwed with oil replenishment caps;

[0009] When the power steering is in non-power steering mode, the external vibration force borne by the steering tie rod will act on the corresponding liquid plug 2 and spring 1 through the power oil;

[0010] Remove the cover to supplement or replace the V-ring in the end groove to repair the sealing of the threaded pipe shaft;

[0011] The oil leakage indication structure is used to directly detect the oil leakage of the threaded pipe shaft;

[0012] The combination of the anti-overflow valve and the oil replenishing cap is used for maintenance personnel to replenish the power-assisted oil in the threaded pipe shaft.

[0013] The end of the steering rocker arm extending to the inside of the steering assist housing is fixedly connected with a helical gear, and the helical gear is meshed with the meshing section. A torque sensor is fixedly installed on the outer wall of the steering assist housing at the meshing position between the helical gear and the meshing section.

[0014] Both ends of the steering straight tie rod are fixedly connected with steering knuckle arms for traction wheel hubs, the outer surface of the steering straight tie rod and the outside of both ends of the steering auxiliary housing are sleeved with elastic rubber sleeves, the outer surface of the middle part of the threaded tube shaft is movably threaded with a solenoid, the outer surface of the middle part of the steering auxiliary housing is fixedly installed with a power steering motor, and the output end of the power steering motor is connected to the solenoid through a sleeved crawler transmission.

[0015] The torque sensor is electrically connected to the power steering motor and the ball core air valve at the same time. When the torque sensor detects that the steering rocker arm is rotating, the power steering motor is started at the same time and the ball core air valve is in a closed state. When the torque sensor detects that the steering rocker arm stops rotating, the power steering motor is closed at the same time and the ball core air valve is in a clear state. The ball core air valve is assembled inside with a ball core for controlling the clearing of the oil guide pipe.

[0016] Both ends of the threaded tube shaft are fixedly connected with oil guide pipes, and the ends of the two oil guide pipes are fixedly connected with the two ends of the double-position relief cylinder. The liquid plug 1 is sealingly arranged in the middle of the threaded tube shaft, and both ends of the double-position relief cylinder are provided with oil pressure chambers, and liquid plugs 2 are slidably arranged inside the two oil pressure chambers. A spring 1 is connected between the adjacent sides of the two liquid plugs and the inner wall of the oil pressure chamber. The interior of the threaded tube shaft is filled with power-assisting oil, and the threaded tube shaft is connected with the corresponding oil pressure chamber through the oil guide pipe.

[0017] The sealing structure comprises a Y-shaped sealing ring, a V-shaped sealing ring and a cover. The Y-shaped sealing ring is embedded in the inner wall at both ends of the threaded pipe shaft. The cross-sectional shape of the Y-shaped sealing ring is a Y-shaped one and the open side faces the inside of the threaded pipe shaft. Both ends of the threaded pipe shaft are provided with end grooves. The V-shaped sealing ring is embedded in the end groove in an array manner. The cross-sectional shape of the V-shaped sealing ring is a V-shaped one and the open side faces the inside of the threaded pipe shaft. The cover is fixedly installed at both ends of the threaded pipe shaft by bolts. The inner wall of the cover is integrally provided with a push tube. The push tube is inserted into the corresponding end groove and is used to squeeze the V-shaped sealing ring to fit tightly against the outer surface of the steering straight tie rod.

[0018] The liquid plug 2 is located on the edge of one side wall of the spring 1 and is fixedly installed with a magnetic block 1. The oil leakage warning structure includes a spring 1 which is integrally arranged on the outer wall of one side of the double-position relief cylinder. Both ends of the outer wall of the double-position relief cylinder and the inner side of the wall frame are integrally provided with a slide groove. A slider is slidably installed inside the slide groove. The inner wall of the slider is embedded with a magnetic block 2 which is fixedly installed, and the magnetic block 2 is connected to the adjacent magnetic block 1 by magnetic force.

[0019] A gear rod 1 is fixedly provided on the upper and lower surfaces of the slide groove, a wheel axle is rotatably assembled on the outer side of the slider, gear 1 is fixedly installed on both ends of the wheel axle, and gear 1 is meshed with the corresponding gear rod 1, and gear 2 is coaxially fixedly installed on the outer sides of the two gears 1.

[0020] The upper and lower surfaces of the wall frame are provided with frame sealing plates, the side walls of the wall frame are open and provided with scale plates, both ends of the wall frame are slidably assembled with prompt slides, two gear rods are fixedly provided on both sides of the top and bottom of the inner wall of the prompt slide, and the two gear rods are meshed with the corresponding two gears, and a pointer is fixedly provided in the middle of the outer wall of the prompt slide.

[0021] A second spring is installed inside the anti-overflow valve, a valve core is installed inside the anti-overflow valve and at the end of the second spring away from the oil replenishing port, a threaded tube is integrally connected to the end of the anti-overflow valve away from the oil replenishing port, and a through rod is fixedly connected to the edge of the outer wall of the anti-overflow valve away from the oil replenishing port in an array manner.

[0022] The oil filling cap is threadedly connected to the screw tube, and a top pipe is integrally connected to the oil filling cap at the center axis, the top pipe penetrates the screw tube and extends into the interior of the anti-overflow valve, the end of the top pipe is connected to the valve core by a top ball plug-in connection, a needle channel is opened at the center axis of the top pipe, and an oil port communicating with the needle channel is opened on the side wall of the end of the top pipe, a baffle is fixedly provided on the inner wall of one end of the needle channel, an annular plate is rotatably sleeved on the outer surface of the oil filling cap, the penetration rod movably penetrates the corresponding annular plate, and springs three are sleeved on the outer surface of the penetration rod and on both sides of the annular plate.

[0023] The technical effects achieved by the present invention are:

[0024] When the power steering device of the present invention is in non-power steering, the vibration external force borne by the steering straight tie rod will act on the corresponding liquid plug 2 and the spring 1 through the power oil, so that the steering straight tie rod and the threaded tube shaft can have a short distance relative movement, avoiding the threaded tube shaft directly bearing the external force and causing wear between the threaded tube, thereby reducing the wear degree between the internal components of the steering device, helping to ensure the service life of each component; in addition, under the coordinated action of the springs 1 on both sides, the steering straight tie rod will eventually return to its original position, ensuring a normal power steering effect.

[0025] When the threaded pipe shaft leaks power-assisting oil and the sealing effect must be optimized, the sealing cap is removed and the abutment pipe is moved out of the end groove, and the damaged V-shaped sealing ring in the end groove is replaced, or several V-shaped sealing rings are added to the end groove, so as to quickly repair the seal between the threaded pipe shaft and the steering straight tie rod. This sealing structure changes the structure in which the traditional sealing ring cannot be quickly replaced and disassembled, and can respond to the power-assisting oil leakage event and make repairs as soon as possible, thereby ensuring a good sealing effect and optimizing the convenience of the repair operation.

[0026] The oil leakage warning structure in the present invention can facilitate maintenance personnel to quickly and directly discover that the threaded pipe shaft has oil leakage, and can also determine the leakage amount by the scale of the pointer corresponding to the scale plate. In addition, its internal structure can also make the moving distance of the warning slide plate far exceed the moving distance of the second liquid plug, thereby amplifying the displacement effect of the second liquid plug, making it easier to observe the oil leakage amount.

[0027] The combination of the anti-overflow valve and the oil filling cap in the present invention is convenient for maintenance personnel to directly replenish the power-assisted oil in the threaded pipe shaft, and cooperates with the pointer in the oil leakage prompt structure to restore the hydraulic pressure at one end of the threaded pipe shaft to its original state, thereby ensuring that the hydraulic pressure at both ends of the threaded pipe shaft is in a balanced state; in addition, the connection design between the top pipe and the valve core, in conjunction with spring two, can prevent the valve core from moving when not in operation, thereby ensuring the sealing performance; the ring plate outside the oil filling cap cooperates with springs three on both sides thereof, thereby preventing the oil filling cap from accidentally loosening when not in operation, thereby ensuring the stability of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a structural diagram of a power steering device provided by an embodiment of the present invention;

[0029] Figure 2 is a cross-sectional structural diagram of a power steering device provided by an embodiment of the present invention;

[0030] Figure 3 It is a combined planar cross-sectional view of a steering rocker arm and a two-position relief cylinder provided by an embodiment of the present invention;

[0031] Figure 4 yes Figure 3 The local enlarged structure diagram at A in the middle;

[0032] Figure 5 yes Figure 3 The local enlarged structure diagram at B in the middle;

[0033] Figure 6 yes Figure 3 The local enlarged structure diagram at C in the middle;

[0034] Figure 7 It is a structural disassembly diagram of a double-position relief cylinder provided in an embodiment of the present invention;

[0035] Figure 8 It is a combined planar cross-sectional view of an anti-overflow valve and an oil supply cap provided by an embodiment of the present invention.

[0036] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0037] 1. Steering auxiliary housing; 101. Open housing; 2. Steering straight tie rod; 201. Meshing section; 202. Liquid plug 1; 3. Elastic rubber sleeve; 4. Steering rocker arm; 401. Helical gear; 5. Torque sensor; 6. Steering knuckle arm; 7. Power steering motor; 8. Threaded pipe shaft; 801. Y-shaped sealing ring; 802. End groove; 803. V-shaped sealing ring; 804. Cover; 805. Push pipe; 806. Oil guide pipe; 807. Oil filling port; 9. Screw pipe; 10. Track; 11. Double-position relief cylinder; 1101. Spring 1; 1102. Liquid plug 2; 1103. Magnetic block 1; 1104. Slide ;1105, slider;1106, magnet block two;1107, gear rod one;1108, gear one;1109, gear two;1110, ledge;1111, prompt slide;1112, gear rod two;1113, pointer;1114, shelf sealing plate;1115, scale plate;12, ball core air valve;1201, ball core;13, anti-overflow valve;1301, valve core;1302, spring two;1303, screw tube;1304, through rod;1305, spring three;14, oil filling cap;1401, top pipe;1402, needle channel;1403, oil port;1404, baffle;1405, ring plate. DETAILED DESCRIPTION

[0038] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0039] like Figure 1-Figure 8As shown, an adaptive automobile electric power steering structure comprises a steering assist housing 1 and a steering rocker arm 4 which is transmission-connected to a steering wheel steering shaft. The steering assist housing 1 is fixedly installed inside a vehicle frame by bolts. A steering straight tie rod 2 is slidingly assembled inside the steering assist housing 1. A meshing section 201 is integrally provided on one side of the middle of the steering straight tie rod 2. The end of the steering rocker arm 4 extending to the inside of the steering assist housing 1 is fixedly connected with a helical cylindrical gear 401, and the helical cylindrical gear 401 is meshed with the meshing section 201. A torque sensor 5 is fixedly installed on the outer wall of the steering assist housing 1 and at the meshing position between the helical cylindrical gear 401 and the meshing section 201. Steering knuckle arms 6 for traction wheel hubs are fixedly connected to both ends of the steering straight tie rod 2. Elastic rubber sleeves 3 are sleeved on the outer surface of the steering straight tie rod 2 and at the outside of both ends of the steering assist housing 1.

[0040] According to the above structure, when the driver turns the steering wheel, the steering shaft causes the steering rocker arm 4 to swing, and then the steering straight tie rod 2 moves laterally with the help of the engagement between the helical cylindrical gear 401 and the meshing section 201, and is transmitted to the steering knuckle and the steering knuckle arm 6 on the steering knuckle through the steering straight tie rod 2, thereby finally realizing the deflection of the wheel.

[0041] Embodiment 1:

[0042] See attached Figure 1-Figure 3 An open shell 101 is integrally provided on one side of the steering assist housing 1, a liquid plug 202 is fixedly installed on the outer surface of the other side of the middle part of the steering straight tie rod 2, a threaded pipe shaft 8 is sleeved on the outer surface of the middle part of the steering straight tie rod 2, and the liquid plug 202 is sealed and arranged in the middle of the threaded pipe shaft 8, a double-position relief cylinder 11 is fixedly provided on one side of the threaded pipe shaft 8 and located inside the open shell 101, a solenoid 9 is movably screwed on the outer surface of the middle part of the threaded pipe shaft 8, a power steering motor 7 is fixedly installed on the outer surface of the middle part of the steering assist housing 1, and the output end of the power steering motor 7 is transmission-connected to the solenoid 9 through a sleeved crawler 10.

[0043] See attached Figure 2-Figure 3 Both ends of the threaded tube shaft 8 are fixedly connected with oil guide pipes 806, and the ends of the two oil guide pipes 806 are fixedly connected to the two ends of the double-position relief cylinder 11. The two oil guide pipes 806 are equipped with ball core air valves 12 at one end close to the double-position relief cylinder 11. The ball core air valve 12 is assembled inside the ball core air valve 12 for controlling the dredging of the oil guide pipe 806. Both ends of the double-position relief cylinder 11 are provided with oil pressure chambers, and liquid plugs 1102 are slidably arranged inside the two oil pressure chambers. A spring 1101 is connected between the side where the two liquid plugs 1102 are close to each other and the inner wall of the oil pressure chamber. The interior of the threaded tube shaft 8 is filled with power-assisting oil, and the threaded tube shaft 8 is connected with the corresponding oil pressure chamber through the oil guide pipe 806.

[0044] See attached Figure 2-Figure 3 The torque sensor 5 is electrically connected to the power steering motor 7 and the ball-core air valve 12 at the same time. When the torque sensor 5 detects that the steering rocker arm 4 rotates, the power steering motor 7 is started at the same time and the ball-core air valve 12 is in a closed state. When the torque sensor 5 detects that the steering rocker arm 4 stops rotating, the power steering motor 7 is closed at the same time and the ball-core air valve 12 is in a clear state.

[0045] According to the above structure, when the torque sensor 5 detects that the steering rocker arm 4 stops rotating, the power steering motor 7 is turned off at the same time and the ball core air valve 12 is in a clear state. Figure 3 As shown, when the car passes through a bumpy road section and the vibration is transmitted to the steering straight tie rod 2, the steering straight tie rod 2 is displaced due to the vibration external force F. Since the power-assisting oil inside the threaded tube shaft 8 is in a flowing state at this time, a relatively short distance of relative work can occur between the steering straight tie rod 2 and the threaded tube shaft 8, and the liquid plug 1 202 will push the power-assisting oil on one side thereof along the route L into the oil pressure chamber at one end of the double-position relief oil cylinder 11, and the corresponding liquid plug 2 1102 will move and squeeze the corresponding spring 1 1101, while the liquid plug 2 1102 at the other end will move in the opposite direction and stretch the corresponding spring 1 1101. At this time, the work done by the vibration external force F on the steering straight tie rod 2 will be transferred to the corresponding liquid plug 2 1102 and the spring 1 1101 through the power-assisting oil. Under the coordinated action of the springs 1 1101 on both sides, the steering straight tie rod 2 will eventually return to its original position;

[0046] In the above process, when the power steering gear is in non-power steering, the vibration external force borne by the steering straight tie rod 2 will act on the corresponding liquid plug 2 1102 and the spring 1 101 through the power oil, so that a relatively short distance can occur between the steering straight tie rod 2 and the threaded tube shaft 8, thereby preventing the threaded tube shaft 8 from directly bearing the external force and causing wear between the threaded tube 9, thereby reducing the degree of wear between the internal components of the steering gear and helping to ensure the service life of each component; in addition, under the coordinated action of the springs 1101 on both sides, the steering straight tie rod 2 will eventually return to its original position, ensuring a normal power steering effect.

[0047] The working principle of the present invention is as follows: when the power steering is in operation, when the torque sensor 5 detects that the steering rocker arm 4 is rotating, the power steering motor 7 is started at the same time and the ball core air valve 12 is in a closed state, and the power steering motor 7 drives the solenoid 9 to rotate together through the crawler 10. Since the solenoid 9 is threadedly connected with the threaded tube shaft 8, the threaded tube shaft 8 moves laterally and linearly. Since the power oil inside the threaded tube shaft 8 is in a non-circulating state at this time, the power oil applies pressure to the liquid plug 202 and drives the steering straight tie rod 2 to rotate together, thereby completing the work of power steering the vehicle;

[0048] When the torque sensor 5 detects that the steering rocker arm 4 stops rotating, the power steering motor 7 is turned off at the same time and the ball core air valve 12 is in a clear state. Figure 3 As shown, when the car passes through a bumpy road section and the vibration is transmitted to the steering straight tie rod 2, the steering straight tie rod 2 is displaced due to the vibration external force F. Since the power-assisting oil inside the threaded tube shaft 8 is in a flowing state at this time, a relatively short distance of relative work can occur between the steering straight tie rod 2 and the threaded tube shaft 8, and the liquid plug 1 202 will push the power-assisting oil on one side thereof along the route L into the oil pressure chamber at one end of the double-position relief cylinder 11, and the corresponding liquid plug 2 1102 will move and squeeze the corresponding spring 1 1101, while the liquid plug 2 1102 at the other end will move in the opposite direction and stretch the corresponding spring 1 1101. At this time, the work done by the vibration external force F on the steering straight tie rod 2 will be transferred to the corresponding liquid plug 2 1102 and the spring 1 1101 through the power-assisting oil. Under the coordinated action of the springs 1 1101 on both sides, the steering straight tie rod 2 will eventually return to its original position.

[0049] Embodiment 2:

[0050] See attached Figure 3-Figure 4 , both ends of the threaded tubular shaft 8 are provided with sealing structures, the sealing structures include a Y-shaped sealing ring 801, a V-shaped sealing ring 803 and a cover 804, the Y-shaped sealing ring 801 is embedded in the inner walls of both ends of the threaded tubular shaft 8, the cross-sectional shape of the Y-shaped sealing ring 801 is a Y-shaped one and the open side faces the inside of the threaded tubular shaft 8, both ends of the threaded tubular shaft 8 are provided with end grooves 802, the V-shaped sealing ring 803 is embedded in the end groove 802 in an array manner, the cross-sectional shape of the V-shaped sealing ring 803 is a V-shaped one and the open side faces the inside of the threaded tubular shaft 8, the cover 804 is fixedly installed on both ends of the threaded tubular shaft 8 by bolts, and the inner wall of the cover 804 is integrally provided with a push tube 805, the push tube 805 is inserted into the corresponding end groove 802 and is used to squeeze the V-shaped sealing ring 803 to be close to the outer surface of the steering straight tie rod 2.

[0051] According to the above structure, the Y-shaped sealing ring 801 and the plurality of V-shaped sealing rings 803 jointly ensure the sealing effect between the threaded tube shaft 8 and the steering straight tie rod 2, and avoid the leakage of the power-assisting oil inside the threaded tube shaft 8 as much as possible. In addition, when the power-assisting oil leaks and the sealing effect must be optimized, the cover 804 is removed and the abutting tube 805 is moved out of the end groove 802, and the damaged V-shaped sealing ring 803 in the end groove 802 is replaced, or a few more V-shaped sealing rings 803 are added to the end groove 802, so as to quickly repair the seal between the threaded tube shaft 8 and the steering straight tie rod 2. This sealing structure changes the structure in which the traditional sealing ring cannot be quickly replaced and disassembled, and can respond to the leakage of the power-assisting oil as soon as possible and make repairs, thereby optimizing the convenience of the repair operation while ensuring a good sealing effect.

[0052] The working principle of the present invention is as follows: when the power-assisting oil leaks and the sealing effect must be optimized, the sealing cover 804 is removed and the abutment tube 805 is moved out of the end groove 802, and the damaged V-shaped sealing ring 803 in the end groove 802 is replaced, or several additional V-shaped sealing rings 803 are added to the end groove 802, so as to quickly repair the sealing effect between the threaded pipe shaft 8 and the steering straight tie rod 2.

[0053] Embodiment three:

[0054] See attached Figure 6-Figure 7 An oil leakage warning structure is arranged on the outer side of the double-position relief cylinder 11, and a liquid plug 1102 is located on the edge of a side wall of the spring 1101 and is fixedly installed with a magnetic block 1103. The oil leakage warning structure includes a spring 1101 which is integrally arranged on the outer wall of one side of the double-position relief cylinder 11, and a slide groove 1104 is integrally arranged on both ends of the outer wall of the double-position relief cylinder 11 and on the inner side of the wall frame 1110, and a slider 1105 is slidably installed inside the slide groove 1104, and a magnetic block 1106 is embedded and fixedly installed on the inner wall of the slider 1105, and the magnetic block 1106 is connected to the adjacent magnetic block 1103 by magnetic force;

[0055] See attached Figure 6-Figure 7 , gear rods 1107 are fixedly arranged on the upper and lower surfaces of the slide groove 1104, a wheel shaft is rotatably assembled on the outer side of the slider 1105, gears 1108 are fixedly installed on both ends of the wheel shaft, and gears 1108 are meshed with corresponding gear rods 1107, and gears 2 1109 are coaxially fixedly installed on the outer sides of the two gears 1108;

[0056] See attached Figure 6-Figure 7 The upper and lower surfaces of the ledge 1110 are both provided with a shelf sealing plate 1114, the side wall of the ledge 1110 is open and is also provided with a scale plate 1115, both ends of the interior of the ledge 1110 are slidably assembled with a prompt slide 1111, both sides of the top and bottom of the inner wall of the prompt slide 1111 are fixedly provided with a gear rod 1112, and the gear rod 1112 is meshed with the corresponding gear 1109, and a pointer 1113 is fixedly provided in the middle of the outer wall of the prompt slide 1111.

[0057] According to the above structure, when the power-assisting oil leaks from the threaded pipe shaft 8, the position of the second liquid plug 1102 at the leakage end in the corresponding oil pressure chamber will change, and under the magnetic attraction of the second magnetic block 1106 and the first magnetic block 1103, the slider 1105 on the corresponding side will also move. Since the gear 1108 is meshed with the toothed rod 1107 on the side wall of the slide groove 1104, when the slider 1105 moves, the gear 1108 will rotate accordingly, and the gear 2 1109 will rotate synchronously. Moreover, since the gear 2 1109 is meshed with the toothed rod 2 1112 on the inner wall of the prompt slide plate 1111, the prompt slide plate 1111 moves. In addition, when the slider 1105 moves, the contact between the gear 2 1109 and the toothed rod 2 1112 can drive the prompt slide plate 1111 to move, and the prompt slide plate 1111 can move under the meshing of the gear 2 1109 and the toothed rod 2 1112. The two The power-assisted movement direction is the same, so that the moving distance of the prompt slide 1111 is greater than the moving distance of the slider 1105. Since the transmission ratio between gear 1 108 and rack 1 1107 is different from the transmission ratio between gear 2 1109 and rack 2 1112, the moving distance of the prompt slide 1111 can be amplified. The staff can directly obtain the oil leakage situation by observing the position of the scale plate 1115 corresponding to the pointer 1113 on the outer wall of the prompt slide 1111. The oil leakage prompt structure can facilitate maintenance personnel to quickly and directly discover that the threaded pipe shaft 8 has oil leakage, and the leakage amount can also be determined by the scale of the scale plate 1115 corresponding to the pointer 1113. In addition, its internal structure can also make the moving distance of the prompt slide 1111 far exceed the moving distance of the liquid plug 2 1102, thereby amplifying the displacement effect of the liquid plug 2 1102, making it easier to observe the oil leakage amount.

[0058] The working principle of the present invention is as follows: when the power-assisting oil leaks from the threaded pipe shaft 8, the position of the liquid plug 1102 at the leakage end in the corresponding oil pressure chamber will change, and under the magnetic attraction of the magnetic block 1106 and the magnetic block 1103, the slider 1105 on the corresponding side will also move. Since the gear 1108 is meshed with the toothed rod 1107 on the side wall of the slide groove 1104, when the slider 1105 moves, the gear 1108 will rotate accordingly, and the gear 2 1109 will rotate synchronously. Moreover, since the gear 1109 is meshed with the toothed rod 1112 on the inner wall of the prompt slide plate 1111, the prompt slide plate 1111 moves. The maintenance personnel can directly obtain the oil leakage situation by observing the position of the scale plate 1115 corresponding to the pointer 1113 on the outer wall of the prompt slide plate 1111.

[0059] Embodiment 4:

[0060] See attached Figure 5 and Figure 8The corners of the two oil guide pipes 806 are integrally connected with an oil replenishing port 807, and the end of the oil replenishing port 807 is fixed with an anti-overflow valve 13 by bolts, a spring 2 1302 is installed inside the anti-overflow valve 13, a valve core 1301 is installed inside the anti-overflow valve 13 and at the end of the spring 2 1302 away from the oil replenishing port 807, a threaded tube 1303 is integrally connected to the end of the anti-overflow valve 13 away from the oil replenishing port 807, and a through rod 1304 is fixedly connected in an array manner to the edge of the outer wall of the anti-overflow valve 13 away from the oil replenishing port 807.

[0061] See attached Figure 5 and Figure 8 , an oil replenishing cap 14 is screwed on one end of the anti-overflow valve 13 away from the oil replenishing port 807, the oil replenishing cap 14 is screwed on the screw tube 1303, and a top pipe 1401 is integrally connected to the center axis of the oil replenishing cap 14, the top pipe 1401 penetrates the screw tube 1303 and penetrates into the interior of the anti-overflow valve 13, the end of the top pipe 1401 is connected to the valve core 1301 by a top ball plug-in connection, a needle channel 1402 is opened at the center axis of the top pipe 1401, and an oil port 1403 communicating with the needle channel 1402 is opened on the side wall of the end of the top pipe 1401, a baffle 1404 is fixedly provided on the inner wall of one end of the needle channel 1402, a ring plate 1405 is rotatably sleeved on the outer surface of the oil replenishing cap 14, the penetration rod 1304 movably penetrates the corresponding ring plate 1405, and springs 1305 are sleeved on the outer surface of the penetration rod 1304 and on both sides of the ring plate 1405.

[0062] According to the above structure, after solving the oil leakage problem of the threaded shaft 8, in order to reset the liquid plug 1102 on one side of the double-position relief cylinder 11, it is necessary to add boosting oil to the corresponding end of the threaded shaft 8. First, open the ball core air valve 12 at the corresponding end, and then insert the end of the syringe containing boosting oil into the needle channel 1402. The setting of the baffle 1404 can prevent the boosting oil from overflowing from the needle channel 1402 during oil injection. Then rotate the oil replenishing cap 14 to make it close to the anti-overflow valve 13. During the process, the push pipe 1401 will push open the valve core 1301, and then immediately press the syringe to inject the boosting oil into the oil pressure chamber at the corresponding end. When the pointer 1113 at the corresponding end is reset to the initial scale, the hydraulic The oil replenishment is completed, and the anti-overflow valve 13 and the oil replenishing cap 14 are combined to facilitate maintenance personnel to directly replenish the power-assisted oil in the threaded shaft 8, and cooperate with the pointer 1113 in the oil leakage prompt structure to restore the hydraulic pressure at one end of the threaded shaft 8 to its original state, thereby ensuring that the hydraulic pressures at both ends of the threaded shaft 8 are in a balanced state; in addition, the connection design between the top pipe 1401 and the valve core 1301, in conjunction with the spring two 1302, can prevent the valve core 1301 from moving when not in operation, thereby ensuring the sealing performance; the ring plate 1405 on the outside of the oil replenishing cap 14 cooperates with the spring three 1305 on both sides thereof to prevent the oil replenishing cap 14 from accidentally loosening when not in operation, thereby ensuring the stability of the parts.

[0063] The working principle of the present invention is: after solving the oil leakage problem of the threaded tube shaft 8, in order to reset the liquid plug 1102 on one side of the double-position relief cylinder 11, it is necessary to add boosting oil to the corresponding end of the threaded tube shaft 8. First, open the ball core air valve 12 at the corresponding end, and then insert the end of the syringe containing boosting oil into the needle channel 1402. The setting of the baffle 1404 can prevent the boosting oil from overflowing from the needle channel 1402 during oil injection. Then rotate the oil replenishing cap 14 to make it close to the anti-overflow valve 13. During the process, the pushing pipe 1401 will push open the valve core 1301, and then immediately press the syringe to inject the boosting oil into the oil pressure cavity of the corresponding end. When the pointer 1113 at the corresponding end is reset to the initial scale, the hydraulic pressure in the oil pressure cavity of this end will return to its original state, and the boosting oil will be replenished.

[0064] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. An adaptive automobile electric power steering structure, comprising a steering assistance housing (1) and a steering rocker arm (4) drivingly connected to a steering wheel steering shaft, wherein the steering assistance housing (1) is fixedly mounted inside a vehicle frame by bolts, and a steering straight tie rod (2) is assembled in a through-type sliding manner inside the steering assistance housing (1), characterized in that: An open housing (101) is integrally provided on one side of the steering assist housing (1), an engagement section (201) is integrally provided on one side of the middle portion of the steering straight tie rod (2), a liquid plug (202) is fixedly mounted on the outer surface of the other side of the middle portion of the steering straight tie rod (2), a threaded tube shaft (8) is sleeved on the outer surface of the middle portion of the steering straight tie rod (2), and a double-position relief oil cylinder (11) is fixedly provided on one side of the threaded tube shaft (8) and located inside the open housing (101); Both ends of the threaded pipe shaft (8) are provided with sealing structures, the outer side of the double-position relief cylinder (11) is provided with an oil leakage warning structure, the ends of the two oil guide pipes (806) close to the double-position relief cylinder (11) are equipped with ball core air valves (12), the corners of the two oil guide pipes (806) are integrally connected with oil replenishment ports (807), and the ends of the oil replenishment ports (807) are fixed with anti-overflow valves (13) by bolts, and the ends of the anti-overflow valves (13) away from the oil replenishment ports (807) are screwed with oil replenishment caps (14); When the power steering gear is in non-power steering mode, the external vibration force borne by the steering tie rod (2) will act on the corresponding liquid plug 2 (1102) and spring 1 (1101) through the power steering oil; The sealing cover (804) is removed to supplement or replace the V-shaped sealing ring (803) in the end groove (802) to repair the sealing performance of the threaded pipe shaft (8); The oil leakage indication structure is used to directly detect the oil leakage of the threaded pipe shaft (8); The combination of the anti-overflow valve (13) and the oil replenishing cap (14) is used to allow maintenance personnel to replenish the power-assisted oil in the threaded pipe shaft (8).

2. The adaptive automobile electric power steering structure according to claim 1, characterized in that: The end of the steering rocker arm (4) extending to the interior of the steering assistance housing (1) is fixedly connected to a helical cylindrical gear (401), and the helical cylindrical gear (401) is meshed with the meshing section (201), and a torque sensor (5) is fixedly mounted on the outer wall of the steering assistance housing (1) at the meshing position between the helical cylindrical gear (401) and the meshing section (201); Both ends of the steering tie rod (2) are fixedly connected to a steering knuckle arm (6) for traction wheel hub, the outer surface of the steering tie rod (2) and the outer sides of the two ends of the steering auxiliary housing (1) are sleeved with elastic rubber sleeves (3), the outer surface of the middle part of the threaded tube shaft (8) is movably threaded with a solenoid (9), the outer surface of the middle part of the steering auxiliary housing (1) is fixedly mounted with a power steering motor (7), and the output end of the power steering motor (7) is transmission-connected to the solenoid (9) via a sleeved crawler (10).

3. The adaptive automobile electric power steering structure according to claim 2, characterized in that: The torque sensor (5) is electrically connected to the power steering motor (7) and the ball core air valve (12) at the same time. When the torque sensor (5) detects that the steering rocker arm (4) is rotating, the power steering motor (7) is started at the same time and the ball core air valve (12) is in a closed state. When the torque sensor (5) detects that the steering rocker arm (4) stops rotating, the power steering motor (7) is closed at the same time and the ball core air valve (12) is in a cleared state. The ball core air valve (12) is assembled inside with a ball core (1201) for controlling the clearing of the oil guide pipe (806).

4. The adaptive automobile electric power steering structure according to claim 1, characterized in that: Both ends of the threaded tube shaft (8) are fixedly connected with oil guide pipes (806), and the ends of the two oil guide pipes (806) are fixedly connected with the two ends of the double-position relief cylinder (11), and the liquid plug one (202) is sealingly arranged in the middle of the threaded tube shaft (8), and both ends of the double-position relief cylinder (11) are provided with oil pressure chambers, and liquid plugs two (1102) are slidably arranged inside the two oil pressure chambers, and springs one (1101) are connected between the adjacent sides of the two liquid plugs two (1102) and the inner wall of the oil pressure chamber, and the interior of the threaded tube shaft (8) is filled with power-assisting oil, and the threaded tube shaft (8) is connected to the corresponding oil pressure chamber through the oil guide pipe (806).

5. The adaptive automobile electric power steering structure according to claim 4, characterized in that: The sealing structure comprises a Y-shaped sealing ring (801), a V-shaped sealing ring (803) and a cover (804). The Y-shaped sealing ring (801) is embedded in the inner wall at both ends of the threaded tube shaft (8). The cross-sectional shape of the Y-shaped sealing ring (801) is a Y-shaped one and the open side faces the inside of the threaded tube shaft (8). Both ends of the threaded tube shaft (8) are provided with end grooves (802). The V-shaped sealing ring (803) is embedded in the inside of the end groove (802) in an array. The cross-sectional shape of the V-shaped sealing ring (803) is a V-shaped one and the open side faces the inside of the threaded tube shaft (8). The cover (804) is fixedly mounted on both ends of the threaded tube shaft (8) by bolts. The inner wall of the cover (804) is integrally provided with a push tube (805). The push tube (805) is inserted into the corresponding end groove (802) and is used to press the V-shaped sealing ring (803) to be close to the outer surface of the steering straight tie rod (2).

6. The adaptive automobile electric power steering structure according to claim 4, characterized in that: The second liquid plug (1102) is located at the edge of a side wall of the first spring (1101) and is fixedly installed with a magnetic block (1103). The oil leakage warning structure includes a spring (1101) which is integrally arranged on the outer wall of one side of the double-position relief cylinder (11). Both ends of the outer wall of the double-position relief cylinder (11) and the inner side of the wall frame (1110) are integrally provided with a slide groove (1104). A slider (1105) is slidably installed inside the slide groove (1104). A second magnetic block (1106) is embedded and fixedly installed on the inner wall of the slider (1105), and the second magnetic block (1106) is connected to the adjacent first magnetic block (1103) by magnetic force.

7. The adaptive automobile electric power steering structure according to claim 6, characterized in that: The upper and lower surfaces of the slide groove (1104) are fixedly provided with a gear rod 1 (1107); the outer side of the slider (1105) is rotatably assembled with a wheel axle; both ends of the wheel axle are fixedly installed with a gear 1 (1108); the gear 1 (1108) is meshed with the corresponding gear rod 1 (1107); and the outer sides of the two gears 1 (1108) are coaxially fixedly installed with a gear 2 (1109).

8. The adaptive automobile electric power steering structure according to claim 7, characterized in that: The upper and lower surfaces of the wall frame (1110) are both provided with a frame sealing plate (1114); the side wall of the wall frame (1110) is open and is also provided with a scale plate (1115); both ends of the interior of the wall frame (1110) are slidably assembled with a prompt slide plate (1111); a second gear rod (1112) is fixedly provided on both sides of the top and bottom of the inner wall of the prompt slide plate (1111); the second gear rod (1112) is meshed with a corresponding second gear (1109); and a pointer (1113) is fixedly provided in the middle of the outer wall of the prompt slide plate (1111).

9. The adaptive automobile electric power steering structure according to claim 1, characterized in that: A second spring (1302) is installed inside the anti-overflow valve (13); a valve core (1301) is installed inside the anti-overflow valve (13) and at one end of the second spring (1302) away from the oil replenishing port (807); a threaded tube (1303) is integrally connected to one end of the anti-overflow valve (13) away from the oil replenishing port (807); and a through rod (1304) is fixedly connected in an array to the edge of the outer wall of the anti-overflow valve (13) away from the oil replenishing port (807).

10. The adaptive automobile electric power steering structure according to claim 9, characterized in that: The oil supply cap (14) is threadedly connected to the screw tube (1303), and a top pipe (1401) is integrally connected to the center axis of the oil supply cap (14). The top pipe (1401) penetrates the screw tube (1303) and penetrates into the interior of the anti-overflow valve (13). The end of the top pipe (1401) is connected to the valve core (1301) by a top ball plug-in connection. A needle channel (1402) is opened at the center axis of the top pipe (1401), and the top pipe (1401) is connected to the valve core (1301) by a top ball plug-in connection. 01) is provided with an oil port (1403) communicating with the needle channel (1402), a baffle (1404) is fixedly provided on the inner wall of one end of the needle channel (1402), a ring plate (1405) is rotatably sleeved on the outer surface of the oil supply cap (14), the penetration rod (1304) movably penetrates the corresponding ring plate (1405), and springs (1305) are sleeved on the outer surface of the penetration rod (1304) and on both sides of the ring plate (1405).

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