Electro-hydraulic proportional power-assisted steering electromagnetic valve structure

Abstract

An electro-hydraulic proportional power-assisted steering electromagnetic valve structure comprises a valve seat, and an annular caulking groove is formed in the right end face of the valve seat. A signal input seat matched with the caulking groove is arranged in the caulking groove; an annular accommodating cavity is formed in the signal input seat; a driving coil matched with the accommodating cavity is arranged in the accommodating cavity; a valve cover matched with the valve seat is arranged on the right end surface of the valve seat; an armature is arranged in the center of the valve cover; the valve cover is covered with a rear cover matched with the valve cover; a connector is arranged in the center of the left end face of the valve seat. A mounting hole is formed in the center of the left end surface of the joint; a valve sleeve matched with the mounting hole is arranged in the mounting hole; a sliding hole communicated with the mounting hole is formed in the center of the right end face of the valve seat. According to the electro-hydraulic proportional power-assisted steering electromagnetic valve structure, the power can be automatically adjusted when the hydraulic power is too large or too small, so that the steering hand power becomes stable, and the rotation of a steering wheel is accurately controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile steering assisting device, especially a kind of electro-hydraulic proportional assisting steering solenoid valve structure. BACKGROUND

[0002] In the structure of traditional hydraulic power steering control valve, oil path switching is realized by angular displacement of valve core and valve sleeve, and reset is realized under the action of elastic element and automobile front suspension return force. Engine is the power source of steering assisting pump, and the hydraulic force of steering valve is directly affected by engine speed. When the automobile is cold started and low speed, the hydraulic force is small, and the assisting force provided to both ends of oil cylinder piston is small. At this time, the steering hand force of driver is heavy when steering wheel is rotated. When the automobile is running at high speed, the steering pump is operated at high speed, and the hydraulic force is increased. At this time, the assisting force provided to both ends of oil cylinder piston is large. At this time, the steering hand force of driver is light when steering wheel is rotated. This steering feeling will cause discomfort to the driver, and finally lead to that the driver is difficult to accurately apply pressure to steering wheel to control the rotation of steering wheel, which is easy to cause accidents. SUMMARY

[0003] The utility model solves the prior art problems, provides a kind of electro-hydraulic proportional assisting steering solenoid valve structure, it can automatically adjust the size of assisting force when hydraulic force is too large or too small, make the steering hand force become stable, to accurately control the rotation of steering wheel.

[0004] The utility model solves the above-mentioned technical problems by the technical scheme that:

[0005] The utility model discloses an electro-hydraulic proportional assisting steering solenoid valve structure, including valve seat, the right end surface of valve seat is equipped with the annular embedding slot of one;The embedding slot is equipped with the signal input seat matched with it in;The signal input seat is equipped with the annular containing cavity of one in;The containing cavity is equipped with the drive coil matched with it in;The right end surface of valve seat is equipped with the valve cover matched with it;The valve cover center is equipped with a armature;The valve cover is covered with the rear cover matched with it;The left end surface center of valve seat is equipped with a joint;The left end surface center of joint is equipped with an installation hole;The installation hole is equipped with the valve sleeve matched with it in;The right end surface center of valve seat is equipped with the sliding hole that is penetrated with installation hole;The sliding hole is equipped with the sliding core matched with it;The right end of sliding core passes through armature to the right and is equipped with the compression spring piece between valve cover and rear cover;The valve sleeve has oil inlet hole, and the oil inlet hole is sealed by left displacement of sliding core;The joint outer wall is equipped with the oil outlet hole that is penetrated with the right end of installation hole;When the oil inlet hole is not blocked, the oil inlet hole is penetrated with oil outlet hole.

[0006] The right end face of the valve sleeve is provided with a boss in the center; the right end face of the boss is provided with a sealing hole in the center; the left end face of the sliding core is provided with a sealing head matched with the sealing hole; the oil inlet hole is arranged in the center of the left end face of the valve sleeve, the center of the bottom of the oil inlet hole and the center of the bottom of the sealing hole are connected through an opening and closing hole, the sealing head blocks and seals the right end hole of the opening and closing hole; the outer wall of the boss is provided with a drainage hole connected with the sealing hole; the outer wall of the boss and the inner wall of the mounting hole are provided with an oil passing gap, and the oil outlet hole is connected with the oil passing gap.

[0007] The diameters of the left end of the sealing head and the right end hole of the opening and closing hole gradually decrease from right to left.

[0008] The valve cover is provided with a through hole in the center, and the armature is located in the through hole; the center of the armature is provided with a connecting hole matched with the sliding core; when the driving coil generates a magnetic field and moves the armature to the left, the armature can synchronously drive the sliding core to move to the left.

[0009] The right end hole of the through hole is provided with an annular clamping groove, and the outer edge of the compression spring piece is clamped in the clamping groove; the right inner wall of the rear cover presses the compression spring piece on the left groove wall of the clamping groove.

[0010] The outer wall of the valve cover is provided with an annular fixing part, and the fixing part is attached to the right end face of the valve seat; the left end face of the valve cover is attached to the right side wall of the signal input seat.

[0011] The upper surface of the valve seat is provided with an opening on the right side; the upper surface of the signal input seat is provided with a signal input head matched with the opening.

[0012] The fixing part and the valve seat, and the rear cover and the valve cover are fixed through a plurality of evenly distributed screws.

[0013] The beneficial effects of the utility model are:

[0014] Compared with the prior art, the electro-hydraulic proportional power-assisted steering solenoid valve structure of the utility model, when the automobile is running at low speed and high speed, the current size delivered to the solenoid valve is different, thereby effectively controlling the flow of the oil through the oil inlet hole of the solenoid valve to the oil outlet hole through the different currents, and in the process of automobile running, the steering assist pump sucks the oil from the oil tank, flows through the steering control valve and returns to the oil tank, and is always in a constant flow state, at the same time, the oil sucked from the oil tank by the steering assist pump flows to the steering power cylinder and the solenoid valve, therefore, when the automobile is running at low speed, the greater the current delivered to the solenoid valve, the smaller the flow of the oil through the solenoid valve and the bypass oil passage to the oil tank in turn, and the flow of the oil sucked from the oil tank by the steering assist pump to the steering power cylinder is greater, and the liquid force applied to the piston of the steering power cylinder is greater, thereby reducing the steering force, when the automobile is running at high speed, the smaller the current delivered to the solenoid valve, the greater the flow of the oil through the solenoid valve and the bypass oil passage to the oil tank in turn, and the flow of the oil sucked from the oil tank by the steering assist pump to the steering power cylinder is smaller, thereby achieving the effect of unloading the liquid force, and the liquid force applied to the piston of the steering power cylinder is smaller, thereby reducing the steering force, thereby automatically adjusting the power size when the liquid force is too large when the automobile is running at high speed or the liquid force is too small when the automobile is running at low speed, and making the steering hand force stable, thereby accurately controlling the rotation of the steering wheel. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is the cross-sectional view of the electro-hydraulic proportional power-assisted steering solenoid valve structure of the utility model;

[0016] Fig. 2 is the structural schematic view of the electro-hydraulic proportional power-assisted steering solenoid valve structure of the utility model;

[0017] Fig. 3 is the function module view of the electro-hydraulic proportional power-assisted steering solenoid valve structure of the utility model when power-assisted steering. DETAILED DESCRIPTION

[0018] The application will be further described in detail in combination with the drawings and specific embodiments:

[0019] Please refer to Figs. 1 to 3The utility model provides a kind of electro-hydraulic proportional power-assisted steering solenoid valve structure, including valve seat 101, the valve seat 101 right end surface is equipped with one annular embedding slot 102;The embedding slot 102 is equipped with the signal input seat 103 matched with it in;The signal input seat 103 is equipped with one annular containing cavity 104 in;The containing cavity 104 is equipped with the drive coil 105 matched with it in;The valve seat 101 right end surface is equipped with the valve cover 106 matched with it;The valve cover 106 center is equipped with one armature 107;The valve cover 106 is covered with the back cover 108 matched with it;The valve seat 101 left end surface center is equipped with one joint 109;The joint 109 left end surface center is equipped with one mounting hole 110;The mounting hole 110 is equipped with the valve sleeve 111 matched with it in;The valve seat 101 right end surface center is equipped with the sliding hole 112 that is penetrated with mounting hole 110;The sliding hole 112 is equipped with the sliding core 113 matched with it in;The sliding core 113 right end passes through armature 107 right and is equipped with the compression spring piece 114 between valve cover 106 and back cover 108;The valve sleeve 111 has oil inlet hole 115, and sliding core 113 left shift can block oil inlet hole 115 seal;The joint 109 outer wall is equipped with one oil outlet hole 116 that is penetrated with mounting hole 110 right end;When oil inlet hole 115 is not blocked, oil inlet hole 115 and oil outlet hole 116 are penetrated.

[0020] The valve sleeve 111 right end surface center is equipped with one boss 117;The boss 117 right end surface center is equipped with one sealing hole 118;The sliding core 113 left end surface center is equipped with the sealing head 119 matched with sealing hole 118;Oil inlet hole 115 is arranged at the valve sleeve 111 left end surface center, and the bottom center of oil inlet hole 115 hole is penetrated with the opening and closing hole 120 with the bottom center of sealing hole 118, and the sealing head 119 blocks the right end hole of opening and closing hole 120 seal;The boss 117 outer wall is equipped with one drainage hole 121 that is penetrated with sealing hole 118;The boss 117 outer wall and the inner wall between mounting hole 110 have an oil passage gap 122, and oil outlet hole 116 and oil passage gap 122 are penetrated.

[0021] The diameter of the left end of sealing head 119 and the right end hole of opening and closing hole 120 gradually decreases from right to left.

[0022] The valve cover 106 center is equipped with one through hole 123, and armature 107 is located in through hole 123;The armature 107 center is equipped with the connection hole 124 matched with sliding core 113;When the drive coil 105 excitation magnetic field makes armature 107 left shift, armature 107 can synchronously drive sliding core 113 left shift.

[0023] The inner wall of the right end hole of the through hole 123 is provided with a ring-shaped clamping groove 125, and the outer edge of the compression spring sheet 114 is clamped in the clamping groove 125; the right inner wall of the rear cover 108 presses the compression spring sheet 114 on the left groove wall of the clamping groove 125.

[0024] The outer wall of the valve cover 106 is provided with a ring-shaped fixing portion 126, and the fixing portion 126 is attached to the right end surface of the valve seat 101; the left end surface of the valve cover 106 is attached to the right side wall of the signal input seat 103.

[0025] The upper surface of the valve seat 101 is provided with an opening 127 on the right side; the upper surface of the signal input seat 103 is provided with a signal input head 128 matched with the opening 127.

[0026] The fixing portion 126 and the valve seat 101, and the rear cover 108 and the valve cover 106 are fixed by a plurality of evenly distributed screws.

[0027] The use method of the utility model is as follows:

[0028] The signal input head 128 can be used for connecting a power steering control unit, when the automobile is driven at low speed, the current obtained by the electromagnetic valve 1 is large, and when the automobile is driven at high speed, the current obtained by the electromagnetic valve 1 is small.

[0029] When the automobile is driven at high speed, since the current delivered to the electromagnetic valve 1 is small, the magnetic field generated by the driving coil 105 is limited, and therefore the magnetic field has very limited suction force on the armature 107, the slide core 113 almost does not move to the left, and the right end hole of the opening and closing hole 120 is in a completely open state or a state of being largely opened, and at this time, the flow rate of the oil liquid flowing to the oil outlet hole through the opening and closing hole 120 is large.

[0030] When the automobile is driven at low speed, with the current delivered to the electromagnetic valve 1, the current flows through the driving coil 105, thereby exciting the magnetic field, and the greater the current, the greater the suction force of the magnetic field on the armature 107, when the armature 107 is attracted, the armature 107 moves to the left, thereby driving the slide core 113 to move to the left along the track of the sliding hole 112, when the slide core 113 moves to the left, the sealing head 119 arranged at the center of the left end surface of the slide core 113 constantly approaches the opening and closing hole 120, at this time, the flow rate of the oil liquid flowing to the oil outlet hole 116 through the opening and closing hole 120 constantly decreases, when the sealing head 119 blocks the right end hole of the opening and closing hole 120, the oil liquid is directly intercepted in the oil inlet hole 115 and cannot flow to the oil outlet hole 116, and at the same time, with the slide core 113 moving to the left, the middle part of the compression spring sheet 114 is pulled to the left and deformed to generate an elastic force, and this elastic force can make the slide core 113 and the armature 107 move to the right and reset after the current stops being delivered to the electromagnetic valve 1.

[0031] The oil outlet hole 116 is connected with the oil storage tank 2 through a bypass oil passage, so that when the oil flows into the oil outlet hole 116 through the oil inlet hole 115 and the opening and closing hole 120 in sequence, the oil can be returned to the oil storage tank 2 through the bypass oil passage.

[0032] As can be seen from the above, when the automobile is running at low speed and high speed, the current supplied to the electromagnetic valve 1 is different, thereby effectively controlling the flow of the oil through the oil inlet hole 115 of the electromagnetic valve 1 to the oil outlet hole 116 through the different currents. During the running of the automobile, the steering assist pump 3 sucks the oil from the oil storage tank 2, flows through the steering control valve 4 and returns to the oil storage tank 2, and is always in a constant flow state. At the same time, the oil sucked by the steering assist pump 3 from the oil storage tank 2 flows to the electromagnetic valve 1 and the steering power cylinder 5. Therefore, when the automobile is running at low speed, the greater the current supplied to the electromagnetic valve 1, the smaller the flow of the oil through the electromagnetic valve 1 and the bypass oil passage to the oil storage tank 2, and the greater the flow of the oil sucked by the steering assist pump 3 from the oil storage tank 2 to the steering power cylinder 5, so that the hydraulic force applied to the piston 501 of the steering power cylinder 5 becomes greater, thereby reducing the steering force. When the automobile is running at high speed, the smaller the current supplied to the electromagnetic valve 1, the greater the flow of the oil through the electromagnetic valve 1 and the bypass oil passage to the oil storage tank, and the smaller the flow of the oil sucked by the steering assist pump from the oil storage tank to the steering power cylinder, thereby achieving the effect of unloading the hydraulic force, reducing the hydraulic force applied to the piston of the steering power cylinder 5, and making the steering force become heavy, thereby automatically adjusting the assist force when the hydraulic force is too large during high-speed running of the automobile or the hydraulic force is too small during low-speed running of the automobile, and making the steering hand force stable, thereby precisely controlling the rotation of the steering wheel 6.

[0033] During the running of the automobile, the steering assist pump 3 sucks the oil from the oil storage tank 2, flows through the steering control valve 4 and returns to the oil storage tank 2, and is always in a constant flow state. The steering control valve 4 includes a steering valve core and a steering valve sleeve. When the two entities are angularly displaced, the oil is distributed to the corresponding end of the steering power cylinder 5 side, pushing the piston 501 to act, providing assist force for steering. When the steering wheel 6 rotates clockwise, the torsion bar torsion deformation linkage valve core rotates clockwise. The steering valve sleeve and the gear 7 are fixed together, the gear 7 is engaged with the rack 8 and moves to the left side, so that the steering valve core and the steering valve sleeve are angularly displaced, and the hydraulic oil flows through the aperture between the steering valve core and the steering valve sleeve of the steering control valve 4 to the right end of the steering power cylinder 5, pushing the piston 501 to move to the left, and the oil on the left side of the steering power cylinder 5 flows back to the oil storage tank through the oil hole of the steering valve core. When the steering wheel 6 rotates counterclockwise, the opposite is true.

[0034] The diameter of the left end of the sealing head 119 and the right end of the opening of the opening and closing hole 120 gradually decreases from right to left. This structure design makes the gap between the left end of the sealing head 119 and the right end of the opening of the opening and closing hole 120 become smaller, thereby effectively controlling the flow of oil. When the left end of the sealing head 119 is completely inserted into the right end of the opening of the opening and closing hole 120, the outer wall of the left end of the sealing head 119 is in close contact with the inner wall of the right end of the opening of the opening and closing hole 120, thereby completely sealing the right end of the opening of the opening and closing hole 120.

[0035] The inner wall of the right end of the through hole 123 is provided with a ring-shaped clamping groove 125, the outer edge of the compression spring piece 114 is clamped in the clamping groove 125, and the right inner wall of the rear cover 108 presses the compression spring piece 114 on the left groove wall of the clamping groove 125. This fixing method of the compression spring piece 114 is beneficial to the disassembly and assembly of the compression spring piece 114. When the compression spring piece 114 is fixed on the right end of the sliding core 113, a limiting head 129 can be arranged on the right end of the sliding core 113, and then a fastener 130 is arranged on the sliding core 113, the middle part of the compression spring piece 114 is clamped between the limiting head 129 and the fastener 130, thereby the compression spring piece 114 can be fixed on the right end of the sliding core 113.

[0036] The center of the armature 107 is provided with a connecting hole 124 matched with the sliding core 113. The connecting hole 124 and the sliding core 113 can be in interference fit, thereby the fixing between the sliding core 113 and the armature 107 can be realized, and the armature 107 can also be fixed on the sliding core 113 through a screw or other fixing component.

[0037] The outer wall of the valve cover 106 is provided with a ring-shaped fixing part 126, the fixing part 126 is in close contact with the right end surface of the valve seat 101, and the left end surface of the valve cover 106 is in close contact with the right side wall of the signal input seat 103. This fixing method can ensure the stability of the signal input seat 103.

[0038] The fixing part 126 and the valve seat 101, and the rear cover 108 and the valve cover 106 are fixed through a plurality of evenly distributed screws. This fixing method not only can ensure the stability between the fixing part 126 and the valve seat 101, and between the rear cover 108 and the valve cover 106, but also is beneficial to the disassembly and assembly of the valve cover 106 and the rear cover 108, thereby facilitating the disassembly and assembly of the signal input seat 103.

Claims

1. A structure for an electro-hydraulic proportional power steering solenoid valve, comprising a valve seat, characterized in that: The valve seat has an annular groove on its right end face; a matching signal input socket is provided in the groove; an annular receiving cavity is provided in the signal input socket; a matching drive coil is provided in the receiving cavity; a matching valve cover is provided on the right end face of the valve seat; an armature is provided at the center of the valve cover; a matching rear cover is provided on the valve cover; a connector is provided at the center of the left end face of the valve seat; a mounting hole is provided at the center of the left end face of the connector; a matching valve sleeve is provided in the mounting hole; a sliding hole communicating with the mounting hole is provided at the center of the right end face of the valve seat; a matching sliding core is provided in the sliding hole; the right end of the sliding core passes through the armature to the right and is provided with a compression spring between the valve cover and the rear cover; the valve sleeve has an oil inlet hole, which can be blocked and sealed by the sliding core moving to the left; an oil outlet hole communicating with the right end of the mounting hole is provided on the outer wall of the connector; when the oil inlet hole is not blocked, the oil inlet hole and the oil outlet hole communicate with each other.

2. The electro-hydraulic proportional power steering solenoid valve structure according to claim 1, characterized in that: A boss is provided at the center of the right end face of the valve sleeve; a sealing hole is provided at the center of the right end face of the boss; a sealing head matching the sealing hole is provided at the center of the left end face of the sliding core; the oil inlet is located at the center of the left end face of the valve sleeve, and the center of the bottom of the oil inlet and the center of the bottom of the sealing hole are connected by an opening and closing hole, and the sealing head blocks and seals the right end of the opening and closing hole; a drainage hole communicating with the sealing hole is provided on the outer wall of the boss; there is an oil passage gap between the outer wall of the boss and the inner wall of the mounting hole, and the oil outlet is connected to the oil passage gap.

3. The electro-hydraulic proportional power steering solenoid valve structure according to claim 2, characterized in that: The diameters of the left end of the sealing head and the right end of the opening / closing hole both gradually decrease from right to left.

4. The electro-hydraulic proportional power steering solenoid valve structure according to claim 2, characterized in that: The valve cover has a through hole at its center, and the armature is located inside the through hole; the armature has a connecting hole at its center that matches the sliding core; when the drive coil excites a magnetic field to move the armature to the left, the armature can synchronously drive the sliding core to move to the left.

5. The electro-hydraulic proportional power steering solenoid valve structure according to claim 4, characterized in that: The inner wall of the right end of the through hole is provided with an annular groove, and the outer edge of the pressure spring is engaged in the groove; the inner wall of the right side of the rear cover presses the pressure spring against the left side of the groove wall.

6. The electro-hydraulic proportional power steering solenoid valve structure according to claim 1, characterized in that: The outer wall of the valve cover is provided with an annular fixing part, which is in contact with the right end face of the valve seat; the left end face of the valve cover is in contact with the right side wall of the signal input seat.

7. The electro-hydraulic proportional power steering solenoid valve structure according to claim 6, characterized in that: An opening is provided on the right side of the upper surface of the valve seat; a signal input head matching the opening is provided on the upper surface of the signal input seat.

8. The electro-hydraulic proportional power steering solenoid valve structure according to claim 6, characterized in that: The fixing part is fixed to the valve seat, and the back cover is fixed to the valve cover by a number of evenly distributed screws.

Images