CN110481634B - Self-returning type oil pipe for power-assisted steering - Google Patents
Self-returning type oil pipe for power-assisted steering Download PDFInfo
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- CN110481634B CN110481634B CN201910896158.4A CN201910896158A CN110481634B CN 110481634 B CN110481634 B CN 110481634B CN 201910896158 A CN201910896158 A CN 201910896158A CN 110481634 B CN110481634 B CN 110481634B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/062—Details, component parts
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Abstract
The invention discloses an oil pipe for self-return type power-assisted steering, which belongs to the field of automobile hydraulic steering equipment, and is characterized in that a selective positioning bending ring is embedded in a framework layer, so that when a power-assisted steering pipe is extruded, the selective positioning bending ring can be selectively bent at the position of an outward bending ring, on one hand, the outward elasticity provided by a bending point is obviously increased, on the other hand, the bending direction of the bending point is inward, so that the power-assisted steering pipe cannot or is difficult to flatten, the probability of damage of the power-assisted steering pipe due to bending is reduced, the probability of leakage of power-assisted steering oil is reduced, the normal operation of an automobile power-assisted steering system is maintained, the operation of an automobile owner on a steering wheel is facilitated, in addition, the matching use of a limiting microsphere and a connecting rope is realized, and when the power-assisted steering pipe is extruded, the inward positioning ring and the outward bending ring on the positioning bending ring are more tightly connected, making the stability of the selective positioning of the bending loops higher.
Description
Technical Field
The invention relates to the field of automobile hydraulic steering equipment, in particular to a self-return type oil pipe for power-assisted steering.
Background
The mechanical hydraulic power steering system is an economic power steering system, which generally comprises a hydraulic pump, an oil pipe (power steering pipe), a pressure flow control valve body, a V-shaped transmission belt, an oil storage tank and other parts. The system works whether the vehicle is turning or not, and when the speed of a large turning vehicle is low, the hydraulic pump is required to output larger power to obtain larger power assistance. The steering oil pump is arranged on the engine, is driven by the crankshaft through a belt and outputs hydraulic oil outwards. The oil storage tank is provided with an oil inlet pipe joint and an oil outlet pipe joint, and is respectively connected with the steering oil pump and the steering control valve through an oil pipe (a power-assisted steering pipe). The steering control valve is used for changing an oil path. The mechanical steering gear and the cylinder body form a left working cavity and a right working cavity which are respectively connected with the steering control valve through an oil duct.
When the automobile runs straight, the steering control valve communicates the working fluid pumped out by the steering oil pump with the oil tank, the steering oil pump is in an unloading state, and the power steering gear does not play a role in assisting power. When the automobile needs to turn right, a driver turns the steering wheel right, the steering control valve connects working fluid pumped by the steering oil pump with the right cavity, the left cavity is connected with the oil tank, the piston moves downwards under the action of oil pressure, and the left wheel and the right wheel deflect right through the transmission structure, so that right steering is realized.
The overflow valve is arranged in the pipeline of the directional hydraulic power assistance, the hydraulic oil pressure is unloaded when the direction reaches the end in a short time, the valve can only be used for a short time, and as some misoperation of a vehicle owner, such as the steering wheel is not returned to the right when the vehicle is stopped, when the steering wheel is knocked to one side, the pipeline on one side bears great pressure, the oil pipe of the power-assisted pump on the side is possibly leaked or even burst in the field, so that the power-assisted steering fails, the control of the vehicle owner on the steering wheel is influenced, and great hidden danger is easily caused to the safety of passengers of the vehicle owner,
disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a self-return type oil pipe for power steering, which can enable a power steering pipe to be selectively bent at the position of an outward bending ring when being extruded by embedding a selective positioning bending ring in a framework layer, on one hand, the outward elasticity provided by a bending point is obviously increased, on the other hand, the bending direction of the bending point is inward, so that the power steering pipe cannot be or is difficult to flatten, the strength of the power steering pipe is increased, the probability of breakage of the power steering pipe due to bending is reduced, the probability of leakage of power steering oil is reduced, the normal operation of an automobile power steering system is maintained, the operation of an automobile owner on a steering wheel is facilitated, the safety is effectively improved, and in the use process, the limiting microspheres are matched with connecting ropes for use, so that when the power steering pipe is extruded, the inward positioning ring and the outward bending ring on the selective positioning bending ring are more tightly connected by being pressed, so that the stability of the selective positioning bending ring is higher.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
An oil pipe for self-return type power-assisted steering comprises an outer rubber layer, a framework layer and an inward ring, wherein the outer rubber layer, the framework layer and the inward ring are sequentially arranged from outside to inside and are fixedly connected with each other, the framework layer comprises an outer framework layer and an inner damping net layer, a selective positioning bending ring is embedded in the inner damping net layer and comprises a plurality of inward positioning rings and outward bending rings, the inward positioning rings and the outward bending rings are distributed at intervals, two ends of each inward positioning ring are fixedly connected with a half-arc positioning block, one end, away from the outward bending ring, of each half-arc positioning block is connected with the inward positioning rings, each half-arc positioning block comprises a female positioning block and a sub-positioning block, the female positioning block is fixedly connected with the sub-positioning block, a plurality of micropores are formed in the sub-positioning blocks, a connecting rope penetrates through the micropores, and one end of the connecting rope is fixedly connected with the outward bending rings, one end of the connecting rope, which is far away from the outward bending ring, is fixedly connected with a limiting microsphere, the limiting microsphere is positioned between the female positioning block and the sub-positioning block, and the selective positioning bending ring can be embedded in the framework layer, so that when the power-assisted steering tube is extruded, the selective positioning bending ring can be selectively bent at the position of the outward bending ring, on one hand, the outward elastic force provided by the bending point is obviously increased, on the other hand, the bending direction of the bending point is inward, so that the power-assisted steering tube cannot be flattened or is difficult to flatten, the strength of the power-assisted steering tube is increased, the probability of damage of the power-assisted steering tube due to bending is reduced, the probability of leakage of power-assisted steering oil is reduced, the normal operation of an automobile power-assisted steering system is maintained, the operation of an automobile owner on the steering wheel is facilitated, the safety is effectively improved, and the limiting microsphere and, when the power-assisted steering tube is extruded, the inward positioning ring and the outward bending ring on the selected positioning bending ring are more tightly connected by extrusion, so that the stability of the selected positioning bending ring is higher.
Furthermore, the inner layer of the shock absorption net is of a net structure woven by shape memory alloy, the thickness of the cross section of the inner layer of the shock absorption net is 0.5-1cm, the shape memory alloy has the function of shape memory, and after the power steering tube is pressed, the cross section of the inner layer of the shock absorption net can be automatically restored to the original circular shape.
Furthermore, the inward positioning rings and the outward bending rings are both arc-shaped, the centers of the circles of the inward positioning rings are positioned on the inner sides of the selective positioning bending rings, the centers of the outward bending rings are positioned on the outer sides of the selective positioning bending rings, the inward positioning rings and the outward bending rings which are arranged in a staggered mode break the circular shape of the section of the framework layer of the original power-assisted steering tube, and the centers of the inward positioning rings and the outward bending rings which are opposite are distributed, so that the lengths of the inward positioning rings and the outward bending rings are much shorter than that of the whole circular shape, when the power-assisted steering tube is bent, the outward elasticity generated by the bending point part of the power-assisted steering tube is obviously increased, on one hand, the power-assisted steering tube cannot be flattened or is hardly flattened, the strength of the power-assisted steering tube is increased, the probability of breakage of the power-assisted steering tube due to bending is reduced, and on the other hand, thereby prolonging the service life of the power-assisted steering pipe.
Further, the inward positioning ring comprises a binding pipe and a spiral rope, the binding pipe is located on the outer side of the spiral rope, the two ends of the binding pipe and the two ends of the spiral rope are fixedly connected with the half-arc positioning blocks, the binding pipe is used for binding the spiral rope, the power-assisted steering pipe is not prone to scattering in the process of recovering the original state after being stressed, and therefore the stability of the selective positioning bending ring is improved.
Further, the spiral rope and the outward curved ring are both in a spiral shape, and the spiral rope and the outward curved ring are formed by mutually twisting and winding a plurality of carbon fiber composite materials, the carbon fiber composite materials have high strength and toughness, so that the spiral rope and the outward curved ring formed by twisting and winding the carbon fiber composite materials have high toughness and strength, the strength and the toughness of the spiral rope and the outward curved ring are not easily lost after the spiral rope and the outward curved ring are bent for many times, the overall strength of the power-assisted steering tube is improved, the damage time of the power-assisted steering tube is prolonged, and the service life of the power-assisted steering tube is prolonged.
Further, the one end that the sub-locating piece is close to female locating piece is wavy, spacing microballon is located between two crests of wavy sub-locating piece, and the both sides of spacing microballon are tangent with the both sides of two crests respectively, and after the power assisted steering pipe atress, spacing microballon can receive the power of dragging of even rope for spacing microballon just blocks between two crests, makes the interior locating ring of selecting on the location bending ring receive the extrusion more closely with the outside bending ring, makes the stability of selecting the location bending ring higher.
Furthermore, even the rope is made by silica aerogel material, silica aerogel material matter is light and intensity is high, and high temperature resistant is nonflammable simultaneously for even the rope is difficult for receiving the car in the use and is traveling produced the heat influence and the fracture, thereby improve the stability of connecting between inside holding ring and the outside looper, and even rope surface cladding one deck 0.1-0.3mm thick silastic-layer, the silastic-layer can protect the micropore, makes the micropore difficult string of being cut apart of being even the rope.
Furthermore, the female positioning block and the male positioning block are both made of non-Newtonian fluid, the non-Newtonian fluid is soft when not stressed, after the non-Newtonian fluid is stressed, a stress point can be quickly hardened and thickened, energy can be absorbed in the process, partial extrusion force is removed, and the exterior of the female positioning block and the male positioning block is wrapped with thermoplastic polyurethane elastomer materials, the thermoplastic polyurethane elastomer has the outstanding characteristics of excellent wear resistance, excellent ozone resistance, high hardness, high strength, good elasticity, low temperature resistance, good oil resistance, chemical resistance and environmental resistance, the hydrolysis stability of polyether ester in a humid environment is far superior to that of polyester, the wear resistance and the resilience are both superior to that of common polyurethane and PVC, the aging resistance is superior to that of rubber, so the thermoplastic polyurethane elastomer is an ideal material for replacing PVC and PU, and the thermoplastic polyurethane elastomer can play a role in shaping for the female positioning block and the male positioning block, when the stress is not applied, the shape uncertainty of the primary positioning block and the secondary positioning block caused by the properties of the primary positioning block and the secondary positioning block can be reduced.
Furthermore, the diameter of the limiting microsphere is 1.5-3mm, and the diameter of the limiting microsphere is too small, so that the stress points at the two sides of the limiting microsphere are too close to each other, the stability of the limiting microsphere is poor, and the positioning block is easy to enter the micropore and deionize along the micropore after being stressed for a long time, so that the stability of the selective positioning bending ring is poor, the diameter of the limiting microsphere is too large, two adjacent limiting microspheres are easy to influence each other, the stability of the limiting microsphere is poor, the inner diameter of the micropores is 0.5-0.8mm, and when the micropores are too large, the power-assisted steering tube is extruded, when the limiting microspheres are pulled by the connecting rope, the risk of being clamped into the micropores exists, the micropores are too small, the friction force between the connecting rope and the inner walls of the micropores is increased, and the micropores are easily abraded, the outward bending ring and the half-arc positioning block are easy to break, so that the selective positioning bending ring is easy to damage.
Furthermore, the diameter of the outward-bending ring is 1/4-1/3 of the inward-bending ring, the inward-bending ring is thicker than the outward-bending ring so that the strength of the inward-bending ring is higher, when the assistant steering tube is extruded, the outward-bending ring is easier to be extruded and bent compared with the inward-bending ring, so that the outward-bending ring is bent selectively, and meanwhile, the high-strength inward-bending ring can also have a better supporting and shaping effect on the power-assisted steering tube.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) the scheme can ensure that the positioning bending ring is selectively bent at the position of the outward bending ring when the power-assisted steering tube is extruded by embedding the positioning bending ring in the framework layer, obviously increase the outward elastic force provided by the bending point on the one hand, and ensure that the power-assisted steering tube cannot be flattened or is difficult to flatten because the bending direction of the bending point is inward on the other hand, thereby increasing the strength of the power-assisted steering tube, reducing the probability of damage of the power-assisted steering tube due to bending and reducing the leakage probability of power-assisted steering oil, further maintaining the normal operation of an automobile power-assisted steering system, facilitating the operation of a vehicle owner on a steering wheel, effectively improving the safety, and ensuring that the inward positioning ring and the outward bending ring on the positioning bending ring are more closely connected by extrusion when the power-assisted steering tube is extruded by matching the limiting microspheres and the connecting rope in the use process, making the stability of the selective positioning of the bending loops higher.
(2) The inner layer of the shock absorption net is of a net structure woven by shape memory alloy, the thickness of the cross section of the inner layer of the shock absorption net is 0.5-1cm, the shape memory alloy has the function of shape memory, and when the power steering pipe is pressed, the cross section of the inner layer of the shock absorption net can be automatically restored to the original round shape.
(3) The inward positioning rings and the outward bending rings are both arc-shaped, the circle centers of the inward positioning rings are positioned on the inner sides of the selective positioning bending rings, the circle centers of the outward bending rings are positioned on the outer sides of the selective positioning bending rings, the inward positioning rings and the outward bending rings which are arranged in a staggered mode break the circular shape of the section of the framework layer of the original power-assisted steering tube, and the circle centers of the inward positioning ring and the outward bending ring which are opposite are distributed, so that the length of the inward positioning ring and the outward bending ring is much shorter than that of the whole circle, when the inward positioning ring and the outward bending ring are bent, the outward elasticity generated by the bending point part of the bending part is obviously increased, on one hand, the power steering tube cannot be or is difficult to be crushed, thereby increase the intensity of power assisted steering pipe to reduce the power assisted steering pipe because of the damaged probability of buckling, the big elasticity of on the other hand makes the power assisted steering pipe increase from the ability of recovering original shape after the pressurized, thereby extension power assisted steering pipe's life.
(4) The inward positioning ring comprises a binding pipe and a spiral rope, the binding pipe is located on the outer side of the spiral rope, the two ends of the binding pipe and the two ends of the spiral rope are fixedly connected with the half-arc positioning blocks, the binding pipe is used for binding the spiral rope, the inward positioning ring is difficult to scatter in the process of restoring after the power-assisted steering pipe is stressed, and therefore the stability of the selective positioning bending ring is improved.
(5) The spiral rope and the outward curved ring are the heliciform, and the spiral rope and the outward curved ring are twisted mutually by many carbon-fibre composite and twine and form, carbon-fibre composite's very high intensity and toughness have, make to twist reverse the spiral rope and the outward curved ring that the winding formed by carbon-fibre composite and have very strong toughness and intensity, be difficult for losing its intensity and toughness after the bending of atress many times, thereby the bulk strength of power-assisted steering pipe has been improved, prolong its damaged time, thereby the life of power-assisted steering pipe has been prolonged.
(6) The one end that sub-locating piece is close to female locating piece is wavy, spacing microballon is located between two crests of wavy sub-locating piece, and the both sides of spacing microballon are tangent with the both sides of two crests respectively, after the power assisted steering pipe atress, spacing microballon can receive the power of dragging of even rope, make spacing microballon just block between two crests, make the interior to holding ring and the outside looper on the selective location looper receive the extrusion more closely that connects, make the stability of selective location looper higher.
(7) The connecting rope is made of the silicon dioxide aerogel material, the silicon dioxide aerogel material is light in weight, high in strength and resistant to high temperature and nonflammable, so that the connecting rope is not easily affected by heat generated in the driving process of an automobile in the using process and is broken, the connection stability between the inward positioning ring and the outward bending ring is improved, the surface of the connecting rope is coated with a silicon rubber layer with the thickness of 0.1-0.3mm, and the silicon rubber layer can protect micropores, so that the micropores are not easily broken by the connecting rope.
(8) The mother positioning block and the son positioning block are both made of non-Newtonian fluid, the non-Newtonian fluid is soft when not stressed, after the non-Newtonian fluid is stressed, the stressed point can be quickly hardened and thickened, energy can be absorbed in the process, partial extrusion force is removed, and the exterior of the mother positioning block and the son positioning block is wrapped with thermoplastic polyurethane elastomer materials, the thermoplastic polyurethane elastomer has the outstanding characteristics of excellent wear resistance, excellent ozone resistance, large hardness, high strength, good elasticity and low temperature resistance, good oil resistance, chemical resistance and environmental resistance, the hydrolysis stability of polyether ester in a humid environment is far superior to that of polyester, the wear resistance and the resilience are both superior to those of common polyurethane and PVC, the ageing resistance is superior to that of rubber, and the thermoplastic polyurethane elastomer can be an ideal material for replacing PVC and PU, and can play a role in shaping for the mother positioning block and the son positioning block, when the stress is not applied, the shape uncertainty of the primary positioning block and the secondary positioning block caused by the properties of the primary positioning block and the secondary positioning block can be reduced.
(9) The diameter of the limiting microsphere is 1.5-3mm, the diameter of the limiting microsphere is too small, stress points on two sides of the limiting microsphere are too close, the stability of the limiting microsphere is easy to be poor, the limiting microsphere is easy to enter the micropore after being stressed for a long time, and the locating block is deionized along the micropore, so that the stability of the selective positioning bending ring is poor, the diameter of the limiting microsphere is too large, two adjacent limiting microspheres are easy to influence each other, the stability of the limiting microsphere is poor, the inner diameter of the micropore is 0.5-0.8mm, the micropore is too large, when the power-assisted steering tube is extruded, the limiting microsphere is pulled by a connecting rope, the risk of being stuck into the micropore can exist, the micropore is too small, the friction force between the connecting rope and the inner wall of the micropore can be increased, the micropore is easy to wear, the outward bending ring and the half arc locating block are easy to break, and the selective positioning.
(10) The diameter of the outward-facing bent ring is 1/4-1/3 of the inward-facing positioning ring, the inward-facing positioning ring is thicker than the outward-facing bent ring so that the strength of the inward-facing positioning ring is higher, when the assistant steering tube is extruded, compared with the inward-facing positioning ring, the outward-facing bent ring is more easily extruded and bent, so that the outward-facing bent ring is bent selectively, and meanwhile, the high-strength inward-facing positioning ring can also generate a better supporting and shaping effect on the power-assisted steering tube.
Drawings
FIG. 1 is a schematic structural view in cross section of the present invention;
FIG. 2 is a schematic view of the construction of a shock absorbing mesh layer of the present invention;
FIG. 3 is a schematic view of the structure at A in FIG. 2;
FIG. 4 is a schematic view of the selectively positionable flexure ring of the present invention;
FIG. 5 is a schematic view of the selectively positionable flexure ring of the present invention;
FIG. 6 is a schematic view of the selectively positionable flexure ring of the present invention;
FIG. 7 is a schematic view of the selectively positioned flexure ring of the present invention.
The reference numbers in the figures illustrate:
the device comprises an outer rubber layer 1, a framework layer 2, a framework outer layer 21, a damping net inner layer 22, an inward ring 30, an inward positioning ring 3, a binding pipe 31, a spiral rope 32, an outward bent ring 4, a half-arc positioning block 5, a female positioning block 51, a male positioning block 52, a limiting microsphere 6 and a connecting rope 7.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-2, a self-return type oil tube for power steering includes an outer rubber layer 1, a framework layer 2 and an inward ring 30, the outer rubber layer 1, the framework layer 2 and the inward ring 30 are sequentially arranged from outside to inside and fixedly connected therebetween, the framework layer 2 includes a framework outer layer 21 and a shock-absorbing mesh inner layer 22, a selective positioning bending ring is inlaid in the shock-absorbing mesh inner layer 22, the shock-absorbing mesh inner layer 22 is a mesh structure woven by shape memory alloy, the cross-sectional thickness of the shock-absorbing mesh inner layer 22 is 0.7cm, the shape memory alloy has a shape memory function, and when the power steering tube is pressed, the shock-absorbing mesh inner layer 22 enables the cross-section to self-return to an original round shape.
Referring to fig. 3-4, the selective positioning bending ring includes a plurality of inward positioning rings 3 and outward bending rings 4, the inward positioning rings 3 and the outward bending rings 4 are alternately distributed, both ends of the inward positioning rings 3 are fixedly connected with half-arc positioning blocks 5, one ends of the half-arc positioning blocks 5 far away from the outward bending rings 4 are connected with the inward positioning rings 3, the inward positioning rings 3 and the outward bending rings 4 are arc-shaped, the circle centers of the inward positioning rings 3 are located at the inner sides of the selective positioning bending rings, the circle centers of the outward bending rings 4 are located at the outer sides of the selective positioning bending rings, the staggered inward positioning rings 3 and the outward bending rings 4 break the circular shape of the frame layer cross section of the original power steering tube, and the inward positioning rings 3 and the outward bending rings 4 are distributed at opposite circle centers, so that the lengths of the inward positioning rings 3 and the outward bending rings 4 are much shorter than the whole circular shape, and the entire length of the outward bending rings 4 or the inward positioning rings 3 is 1/16-1-section of the entire frame layer 2 12, when the power steering tube is bent, the outward elastic force generated by the bending point part of the power steering tube is obviously increased, on one hand, the power steering tube cannot be or is difficult to be flattened, so that the strength of the power steering tube is increased, the probability of breakage of the power steering tube due to bending is reduced, on the other hand, the capacity of the power steering tube for automatically returning to the original shape after being pressed is increased due to the large elastic force, and the service life of the power steering tube is prolonged.
Referring to fig. 7, the half arc positioning block 5 includes a female positioning block 51 and a sub positioning block 52, the female positioning block 51 is fixedly connected to the sub positioning block 52, a plurality of micropores are drilled in the sub positioning block 52, a connecting rope 7 is inserted into the micropores, one end of the connecting rope 7 is fixedly connected to the outward curved ring 4, one end of the connecting rope 7 away from the outward curved ring 4 is fixedly connected to a limiting microsphere 6, the limiting microsphere 6 is located between the female positioning block 51 and the sub positioning block 52, one end of the sub positioning block 52 close to the female positioning block 51 is wavy, the limiting microsphere 6 is located between two peaks of the wavy sub positioning block 52, and two sides of the limiting microsphere 6 are respectively tangent to two sides of the two peaks, when the power steering tube is stressed, the limiting microsphere 6 is pulled by the connecting rope 7, so that the limiting microsphere 6 is exactly clamped between the two peaks, so that the inward positioning ring 3 and the outward curved ring 4 on the selected positioning curved ring are more closely connected by extrusion, make the stability of selecting location bending ring higher, even rope 7 is made by silica aerogel material, silica aerogel material matter is light and intensity is high, high temperature resistant nonflammable simultaneously, make even rope 7 difficult receive the car in the use produced heat influence and fracture at the in-process of traveling, thereby improve the stability of connecting between locating ring 3 and the outside bending ring 4, and even 7 surface cladding one deck 0.2mm thick silastic-layer of rope, the silastic-layer can protect the micropore, make the micropore difficult easy 7 clefts of even rope of cutting.
The mother positioning block 51 and the son positioning block 52 are both made of non-Newtonian fluid, such as P4U material, the non-Newtonian fluid is soft when not stressed, when the non-Newtonian fluid is stressed, the stressed point can be quickly hardened and thickened, energy can be absorbed in the process, partial extrusion force can be removed, and the thermoplastic polyurethane elastomer materials are wrapped outside the mother positioning block 51 and the son positioning block 52, the thermoplastic polyurethane elastomer has the outstanding characteristics of excellent wear resistance, excellent ozone resistance, large hardness, high strength, good elasticity and low temperature resistance, good oil resistance, chemical resistance and environmental resistance, the hydrolysis stability of polyether ester in a humid environment is far superior to that of polyester, the wear resistance and the resilience are both superior to that of common polyurethane and PVC, the ageing resistance is superior to that of rubber, so to say, the thermoplastic polyurethane elastomer is the most ideal material for replacing PVC and PU, and the thermoplastic polyurethane elastomer can play a role in shaping for the mother positioning block 51 and the son positioning block 52, when the force is not applied, the shape uncertainty of the female positioning block 51 and the male positioning block 52 caused by the self property can be reduced, the diameter of the limiting microsphere 6 is 2mm, the diameter of the limiting microsphere 6 is too small, the stress points on two sides of the limiting microsphere 6 are too close to each other, the stability of the limiting microsphere 6 is easy to cause is poor, the limiting microsphere 6 is easy to enter the micropore and deionize the positioning block 52 along the micropore after being stressed for a long time, the stability of the selective positioning bending ring is poor, the diameter of the limiting microsphere 6 is too large, two adjacent limiting microspheres 6 are easy to influence each other, the stability of the limiting microsphere 6 is poor, the inner diameter of the micropore is 0.65mm, the micropore is too large, when the power-assisted steering tube is extruded, when the limiting microsphere 6 is pulled by the connecting rope 7, the risk of being stuck into the micropore exists, when the micropore is too small, the friction force between the connecting rope 7 and the inner wall of the, the outward bending ring 4 and the half-arc positioning block 5 are easy to break, so that the selective positioning bending ring is easy to damage.
Referring to fig. 6, the inward positioning ring 3 includes a binding tube 31 and a spiral rope 32, the binding tube 31 is located outside the spiral rope 32, and both ends of the binding tube 31 and the spiral rope 32 are fixedly connected to the half-arc positioning block 5, the binding tube 31 is used for binding the spiral rope 32, so that the spiral rope 32 is not easily scattered in the process of recovering the original shape of the power steering tube after being stressed, thereby improving the stability of the selective positioning bending ring, the diameter of the outward bending ring 4 is 1/3 of the inward positioning ring 3, the inward positioning ring 3 is thicker than the outward bending ring 4, so that the strength of the inward positioning ring 3 is higher, when the assistant steering tube is squeezed, the outward bending ring 4 is more easily squeezed and bent compared to the inward positioning ring 3, so that the outward bending ring 4 is selectively bent, meanwhile, the high-strength inward positioning ring 3 can also generate a better supporting and shaping effect on the power steering tube, and the spiral rope 32 and the outward bending ring 4 are both spiral, the spiral rope 32 and the outward bending ring 4 are formed by mutually twisting and winding a plurality of carbon fiber composite materials, the carbon fiber composite materials have high strength and toughness, so that the spiral rope 32 formed by twisting and winding the carbon fiber composite materials and the outward bending ring 4 have high toughness and strength, and the strength and the toughness of the spiral rope and the outward bending ring are not easy to lose after the spiral rope and the outward bending ring are bent for multiple times, thereby improving the overall strength of the power-assisted steering tube, prolonging the damage time of the power-assisted steering tube, and prolonging the service life of the power-assisted steering tube.
By embedding the selective positioning bending ring in the framework layer, when the power steering tube is extruded, please refer to fig. 5, the selective positioning bending ring can be selectively bent at the outward bending ring 4, and simultaneously, the inward positioning ring 3 can play a role in shaping the whole power steering tube by the arc design of the inward positioning ring 3 opposite to the outward bending ring 4, the outward bending ring 4 can be selectively bent towards the inside of the tube, the length of the bent outward bending ring 4 is much shorter than that of a common overall annular power steering tube, on one hand, the outward elasticity provided by the bending point is remarkably increased, on the other hand, the bending direction of the bending point is inward, so that the power steering tube cannot be or hardly flattened, thereby increasing the strength of the power steering tube, and reducing the probability of damage of the power steering tube due to bending, thereby reducing the leakage of power steering oil, further maintain automobile power assisted steering system's normal operating, the car owner's operation to the steering wheel of being convenient for, effectively improved the security, please refer to fig. 7 to spacing microballon 6 and the cooperation of even rope 7 are used in the use, make power assisted steering pipe receive when extrudeing, spacing microballon 6 can receive the pulling force of even rope 7, make spacing microballon 6 just block between two crests, make select the interior locating ring 3 on the bending ring of location and the outward bending ring 4 receive the extrusion connection more inseparabler more, make the stability of selecting the bending ring of location higher.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (10)
1. The utility model provides an oil pipe for self-recovery formula power assisted steering, includes outer glue film (1), casing ply (2) and interior ring (30), its characterized in that: the outer rubber layer (1), the framework layer (2) and the inward-facing ring (30) are sequentially arranged from outside to inside and are fixedly connected with each other, the framework layer (2) comprises a framework outer layer (21) and a shock absorption net inner layer (22), a selective positioning bending ring is inlaid in the shock absorption net inner layer (22), the selective positioning bending ring comprises a plurality of inward-facing positioning rings (3) and outward-facing bending rings (4), the inward-facing positioning rings (3) and the outward-facing bending rings (4) are distributed at intervals, half-arc positioning blocks (5) are fixedly connected to two ends of each inward-facing positioning ring (3), one ends, far away from the outward-facing bending rings (4), of the half-arc positioning blocks (5) are connected with the inward-facing positioning rings (3), each half-arc positioning block (5) comprises a female positioning block (51) and a sub-positioning block (52), and the female positioning blocks (51) are fixedly connected with the sub-positioning blocks (52), the inside drilling of sub-locating piece (52) has a plurality of micropores, micropore inside runs through to insert and is equipped with even rope (7), even the one end and the outside looper (4) fixed connection of rope (7), even rope (7) keep away from the one end fixedly connected with spacing microballon (6) of outside looper (4), spacing microballon (6) are located between female locating piece (51) and sub-locating piece (52).
2. The self-return type power steering oil pipe according to claim 1, wherein: the inner layer (22) of the shock absorption net is of a net structure formed by weaving shape memory alloy, and the thickness of the section of the inner layer (22) of the shock absorption net is 0.5-1 cm.
3. The self-return type power steering oil pipe according to claim 1, wherein: the shape of the inward positioning ring (3) and the outward bending ring (4) is arc-shaped, the circle center of the inward positioning ring (3) is positioned at the inner side of the selective positioning bending ring, and the circle center of the outward bending ring (4) is positioned at the outer side of the selective positioning bending ring.
4. The self-return type power steering oil pipe according to claim 1, wherein: the inward positioning ring (3) comprises a binding pipe (31) and a spiral rope (32), the binding pipe (31) is located on the outer side of the spiral rope (32), and two ends of the binding pipe (31) and two ends of the spiral rope (32) are fixedly connected with the half-arc positioning blocks (5).
5. The self-return type power steering oil pipe according to claim 4, wherein: the spiral rope (32) and the outward curved ring (4) are both in a spiral shape, and the spiral rope (32) and the outward curved ring (4) are formed by mutually twisting and winding a plurality of carbon fiber composite materials.
6. The self-return type power steering oil pipe according to claim 1, wherein: one end of the sub positioning block (52) close to the main positioning block (51) is wavy, the limiting microspheres (6) are located between two wave crests of the wavy sub positioning block (52), and two sides of the limiting microspheres (6) are tangent to two sides of the two wave crests respectively.
7. The self-return type power steering oil pipe according to claim 1, wherein: the connecting rope (7) is made of silicon dioxide aerogel materials, and a silicon rubber layer with the thickness of 0.1-0.3mm is coated on the surface of the connecting rope (7).
8. The self-return type power steering oil pipe according to claim 1, wherein: the female positioning block (51) and the sub-positioning block (52) are both made of non-Newtonian fluid, and thermoplastic polyurethane elastomer materials are wrapped outside the female positioning block (51) and the sub-positioning block (52).
9. The self-return type power steering oil pipe according to claim 1, wherein: the diameter of the limiting microsphere (6) is 1.5-3mm, and the inner diameter of the micropore is 0.5-0.8 mm.
10. The self-return type power steering oil pipe according to claim 1, wherein: the diameter of the outward bending ring (4) is 1/4-1/3 of the inward positioning ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910896158.4A CN110481634B (en) | 2019-09-22 | 2019-09-22 | Self-returning type oil pipe for power-assisted steering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910896158.4A CN110481634B (en) | 2019-09-22 | 2019-09-22 | Self-returning type oil pipe for power-assisted steering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110481634A CN110481634A (en) | 2019-11-22 |
| CN110481634B true CN110481634B (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910896158.4A Active CN110481634B (en) | 2019-09-22 | 2019-09-22 | Self-returning type oil pipe for power-assisted steering |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100678384B1 (en) * | 2006-10-26 | 2007-02-02 | 육혜연 | Watertight cable of high flexibility for construction |
| DE102006056645B4 (en) * | 2006-11-30 | 2008-11-13 | Ffa Automotive Ag | Protective device for cables and the like |
| CN206786156U (en) * | 2017-03-22 | 2017-12-22 | 嵊州市宝龙带业有限公司 | A kind of novel water hose made-up belt |
| FR3068759B1 (en) * | 2017-07-06 | 2020-06-05 | Dcns Energies | CLEAN CONDUCT TO BE TRAVELED BY A FLUID |
| CN207364484U (en) * | 2017-09-27 | 2018-05-15 | 吉林远东振云塑业有限公司 | A kind of high-toughness wear-resistant PE pipes |
| DE102017124606A1 (en) * | 2017-10-20 | 2019-04-25 | Veritas Ag | Fluid conduit for conducting a fluid |
| CN108458172A (en) * | 2018-05-11 | 2018-08-28 | 泰州市三江消防器材有限公司 | A kind of wear-resisting light reflecting fire hose and preparation method thereof |
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