CN114750824A - Rotary valve of hydraulic power-assisted steering gear - Google Patents
Rotary valve of hydraulic power-assisted steering gear Download PDFInfo
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- CN114750824A CN114750824A CN202210428399.8A CN202210428399A CN114750824A CN 114750824 A CN114750824 A CN 114750824A CN 202210428399 A CN202210428399 A CN 202210428399A CN 114750824 A CN114750824 A CN 114750824A
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- hydraulic power
- rotary valve
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- 238000013016 damping Methods 0.000 claims description 46
- 239000003921 oil Substances 0.000 abstract description 161
- 239000010720 hydraulic oil Substances 0.000 abstract description 5
- 230000002829 reductive effect Effects 0.000 abstract description 4
- 230000002441 reversible effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
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Classifications
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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
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
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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
Abstract
The invention discloses a rotary valve of a hydraulic power-assisted steering gear, which relates to the technical field of hydraulic power assistance. When the hydraulic power assistance fails, hydraulic oil in a steering oil pump and a steering valve of the steering gear does not circulate in a flowing mode, the original low-pressure oil return cavity becomes high pressure with a relative degree, the high pressure pushes the plug open in a reverse direction, and oil circuit circulation is formed, so that the hydraulic resistance is reduced, and hydraulic self-locking is eliminated.
Description
Technical Field
The invention relates to the technical field of hydraulic power assistance, in particular to a rotary valve of a hydraulic power-assisted steering gear.
Background
The steering gear is an important part on the automobile, when a driver rotates a steering wheel, the steering gear reduces the speed and increases the torque of the steering wheel by the steering torque and the steering angle, and then outputs the steering torque and the steering angle to the steering pull rod mechanism, so that the aim of steering the automobile is fulfilled; for example, a commercial vehicle, a truck, a military off-road vehicle, etc. are widely applied with a hydraulic power steering gear, which reduces the number of revolutions of a steering wheel, facilitates a driver to control an automobile when parking or steering, and greatly reduces the labor intensity of the driver. However, when the engine of the vehicle with the steering gear is unexpectedly shut down or the oil pump fails, the hydraulic power steering gear is immediately converted into a mechanical steering gear, the manual force of people is completely used as power for emergency steering, at the moment, the high-pressure oil pump loses power, the internal pressure of the hydraulic power steering device of the automobile is lost, the vehicle is supposed to run linearly, if the steering wheel is not moved, the rack piston in the steering gear is not moved, hydraulic oil in a hydraulic system stops flowing, and wheels do not move; if a driver intends to steer to the right urgently, the driver forcefully drives the steering wheel to the right, a rack piston in the steering gear moves downwards, a rotary valve is opened, hydraulic oil in a lower cavity is squeezed due to the movement of the rack piston, oil in the lower cavity returns to an oil tank through an oil return hole due to the opening of the rotary valve, oil is sucked from an oil inlet way of the steering gear by the upper cavity due to the sealing performance of a hydraulic system, the oil inlet way is connected with a high-speed oil pump, the high-speed oil pump stops moving and cannot pump oil from the oil tank, so negative pressure is generated in the upper cavity, if the rack piston continues to move downwards, hydraulic resistance generated by the negative pressure of the upper cavity needs to be overcome, the more the negative pressure generated by the upper cavity is larger, the more the hydraulic resistance is larger, and the phenomenon of hydraulic self-locking is caused, and serious safety problem is brought to vehicle driving.
Disclosure of Invention
1. Technical problems to be solved by the invention
Aiming at the technical problem that the hydraulic self-locking brings serious safety problems to vehicles, the invention provides a rotary valve of a hydraulic power-assisted steering gear, which realizes the steering function by a mechanical mechanism under the condition of relatively low hand power, eliminates the hydraulic self-locking and ensures the driving safety
2. Technical scheme
In order to solve the problems, the technical scheme provided by the invention is as follows: the utility model provides a hydraulic power steering ware changes valve, includes input shaft, torsion bar and output shaft, torsion bar one end and input shaft, the torsion bar other end and output shaft connection, the output shaft is close to the pot head of input shaft and establishes in the periphery of input shaft, the input shaft is equipped with oil gallery and oil extraction groove along its circumference interval, the output shaft is equipped with inlet port, first oilhole and second oilhole along its circumference, oil extraction groove and inlet port intercommunication, oil extraction groove both sides communicate with first oilhole and second oilhole respectively, oil gallery both sides communicate with first oilhole and second oilhole respectively, the oil gallery is used for communicating with oil return chamber, at least one oil extraction groove is equipped with the through-hole with oil return chamber intercommunication, the activity is equipped with the end cap in the through-hole.
Optionally, the through hole includes a first channel, a tapered portion and a second channel, the diameter of the first channel is greater than the diameter of the second channel, the end with the larger diameter of the tapered portion is connected to the first channel, the end with the smaller diameter of the tapered portion is connected to the second channel, and the diameter of the plug is between the diameter of the first channel and the diameter of the second channel.
Optionally, the input shaft is provided with a clamping groove, the output shaft is provided with a clamping protrusion matched with the clamping groove, and the length of the clamping groove is greater than that of the clamping protrusion.
Optionally, the input shaft outer wall is equipped with the ring channel, be equipped with first damping circle and second damping circle from inside to outside in the ring channel in proper order, the elasticity of first damping circle is greater than the second damping circle, the coefficient of friction of second damping circle is less than the coefficient of friction of second damping circle.
Optionally, an oil guide groove is arranged between the annular groove and the oil discharge groove, and the annular groove is communicated with the oil discharge groove through the oil guide groove.
Optionally, the cross section of the first damping ring and the cross section of the second damping ring are both rectangular.
Optionally, the output shaft includes valve sleeve portion and the screw rod portion of being connected with valve sleeve portion, valve sleeve portion sets up the periphery at the input shaft, inlet port, first oilhole and second oilhole all set up in valve sleeve portion.
Optionally, the plug is of a spherical structure.
Optionally, the screw driver further comprises a shell, a cavity is formed between the shell and the screw portion, a steering nut is sleeved on the periphery of the screw portion, the cavity is divided into a first oil cavity and a second oil cavity by the steering nut, the first oil cavity is communicated with the first oil hole, and the second oil cavity is communicated with the second oil hole.
Optionally, a groove is formed in the inner wall of the input shaft, and the torsion bar is connected with the groove through a positioning pin.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the hydraulic power steering gear rotary valve provided by the embodiment of the application is under the condition that the hydraulic power steering gear normally works, the plug is tightly pressed in the through hole by high-pressure oil in the oil discharge groove, the sealing effect is realized, the oil discharge groove and the oil return cavity can not be communicated, the normal work of the steering gear is ensured, when the hydraulic power steering gear fails, hydraulic oil in a steering oil pump and the steering gear rotary valve can not circulate in a flowing mode, the steering gear is under the action of a mechanical arm force, originally, a low-pressure oil return cavity becomes high pressure with relative degree, the high pressure pushes the plug open in a reverse mode, the high-pressure cavity and the low-pressure cavity are communicated, an oil circuit circulation is formed, the hydraulic resistance is reduced, the steering function is realized by means of a mechanical mechanism under the condition that the manual force is relatively low, the hydraulic self-locking is eliminated, and the driving safety is ensured.
(2) The hydraulic power steering gear rotary valve provided by the embodiment of the application is provided with the through hole and the plug in the oil discharge groove, so that any extra part is not added, the process is simple, the structure of the steering gear is not changed, the size of the steering gear is not increased, and the cost is lower. All can install through-hole and end cap in the oil extraction groove of this embodiment, can accelerate high-low pressure chamber intercommunication efficiency.
(3) The hydraulic power steering ware rotary valve that this application embodiment provided, high-pressure oil when the oil drain tank in flows into the ring channel, and high-pressure oil can help first damping circle to support the second damping circle, and when low pressure state did not have the oil pressure, the second damping circle can be supported at great within range to the first damping circle of rectangle, makes the both ends of second damping circle be unlikely to sink.
(4) The hydraulic power steering ware changes valve that this application embodiment provided, high-pressure oil in the oil drain tank flows into the ring channel through leading the oil groove, and the first damping circle of help supports the second damping circle, has played the effect that restraines input shaft and output shaft vibration, reduction abnormal sound.
Drawings
Fig. 1 is an exploded view of a rotary valve of a hydraulic power steering gear according to an embodiment of the present invention.
Fig. 2 is a sectional view of a rotary valve of a hydraulic power steering gear according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a rotary valve of a hydraulic power steering gear according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of the through hole and the plug in cooperation when the rotary valve of the hydraulic power steering gear provided by the embodiment of the invention normally works.
Fig. 5 is a schematic view of the through hole and the plug matching when the pressure-assisted force fails according to the embodiment of the present invention.
Fig. 6 is an enlarged view of a in fig. 2.
The labels in the various figures are: 1. an input shaft; 11. an oil discharge groove; 12. an oil return groove; 13. a through hole; 131. a first channel; 132. a second channel; 133. a tapered portion; 14. a plug; 15. a card slot; 16. an annular groove; 17. a first damping ring; 18. a second damping ring; 19. an oil guide groove; 2. an output shaft; 21. an oil inlet hole; 22. a first oil hole; 23. a second oil hole; 24. clamping convex; 25. a valve housing portion; 26. a screw section; 3. a torsion bar.
Detailed Description
For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The terms first, second, and the like in the present invention are provided for convenience of describing the technical solution of the present invention, and have no specific limiting effect, but are all generic terms, and do not limit the technical solution of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they 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. The technical solutions in the same embodiment and the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, and the technical solutions are within the scope of the present invention.
Example 1
Referring to fig. 1-6, the rotary valve of the hydraulic power steering gear of the present embodiment includes an input shaft 1, a torsion bar 3 and an output shaft 2, one end of the torsion bar 3 is connected with the input shaft 1, the other end of the torsion bar 3 is connected with the output shaft 2, one end of the output shaft 2 close to the input shaft 1 is sleeved on the periphery of the input shaft 1, the input shaft 1 is provided with oil return grooves 12 and oil discharge grooves 11 at intervals along the circumferential direction thereof, the output shaft 2 is provided with an oil inlet hole 21, a first oil hole 22 and a second oil hole 23 along the circumferential direction thereof, the oil discharge groove 11 is communicated with the oil inlet 21, both sides of the oil discharge groove 11 are respectively communicated with the first oil hole 22 and the second oil hole 23, the two sides of the oil return groove 12 are respectively communicated with the first oil hole 22 and the second oil hole 23, the oil return groove 12 is used for being communicated with an oil return cavity, at least one oil discharge groove 11 is provided with a through hole 13 communicated with the oil return cavity, and a plug 14 is movably arranged in the through hole 13. When the vehicle normally runs, the input shaft 1 does not deflect, high-pressure oil in the oil inlet 21 flows through the oil discharge groove 11, enters the first oil hole 22 and the second oil hole 23 in an equal amount, flows into the oil return groove 12 in an equal amount through the first oil hole 22 and the second oil hole 23, and flows back through the oil return cavity; when steering occurs, the steering column drives the input shaft 1 to rotate anticlockwise or anticlockwise, the torsion bar 3 deforms under torsion force due to resistance between wheels and the ground, and the torsion bar cannot immediately transmit the torsion force to the output shaft 2, so the input shaft 1 rotates anticlockwise relative to the output shaft 2, if oil of high-pressure oil flowing into the first oil hole 22 through the oil discharge groove 11 is larger than that of the second oil hole 23, the oil pressure in the first oil hole 22 rises, low-pressure oil in the second oil hole 23 flows back through the oil return cavity, and if oil of the high-pressure oil flowing into the second oil hole 23 through the oil discharge groove 11 is larger than that of the first oil hole 22, the oil pressure in the second oil hole 23 rises, and low-pressure oil in the first oil hole 22 flows back through the oil return cavity. Under the condition that the hydraulic power-assisted steering gear normally works, the plug 14 is tightly pressed in the through hole 13 by high-pressure oil in the oil discharge groove 11 to play a role of sealing, so that the oil discharge groove 11 and the oil return cavity can not be communicated, the normal work of the steering gear is ensured, when the hydraulic power is failed, hydraulic oil in a steering oil pump and a steering valve of the steering gear does not circulate in a flowing mode, the original low-pressure oil return cavity becomes high pressure with relative degree under the action of mechanical hand force of the steering gear, the high pressure pushes the plug 14 open in a reverse mode, so that the high-pressure and low-pressure cavities are communicated to form oil circuit circulation, the hydraulic resistance is reduced, the steering function is completed by a mechanical mechanism under the condition that the manual force is relatively low, the hydraulic self-locking is eliminated, and the driving safety is ensured. The through hole 13 and the plug 14 are arranged in the oil discharge groove 11, so that no additional part is added, the process is simple, the structure of the steering gear is not changed, the volume of the steering gear is not increased, and the cost is low. In the oil drainage groove 11 of this embodiment, the through hole 13 and the plug 14 can be installed, so that the communication efficiency of the high-pressure and low-pressure cavities can be improved.
Example 2
With reference to fig. 1 to 6, compared with the technical solution of embodiment 1, the hydraulic power steering gear rotary valve of the present embodiment can be improved as follows: the through hole 13 comprises a first channel 131, a tapered part 133 and a second channel 132, the diameter of the first channel 131 is larger than that of the second channel 132, the end with the larger diameter of the tapered part 133 is connected with the first channel 131, the end with the smaller diameter of the tapered part 133 is connected with the second channel 132, and the diameter of the plug 14 is between the diameter of the first channel 131 and the diameter of the second channel 132. The plug 14 is movably arranged at the conical part 133, and the high-pressure oil in the oil discharge groove 11 presses the plug 14 to the conical angle part where the conical part 133 is connected with the second channel 132 to form line-surface sealing, so that the normal work of the steering gear is ensured. In other embodiments, the diameter of the through hole 13 decreases from the outer wall to the inner wall of the input shaft 1.
Example 3
With reference to fig. 1 to 6, the hydraulic power steering gear rotary valve of the present embodiment can be improved as follows compared with the technical solutions of embodiment 1 or 2: the input shaft 1 is provided with a clamping groove 15, the output shaft 2 is provided with a clamping protrusion 24 matched with the clamping groove 15, and the length of the clamping groove 15 is larger than that of the clamping protrusion 24. The length of the clamping groove 15 is larger than that of the clamping protrusion 24, so that the output shaft 2 does not move synchronously with the input shaft 1 at the beginning of rotation of the input shaft 1, and the input shaft 1 drives the output shaft 2 to rotate after the input shaft 1 rotates for a certain angle relative to the output shaft 2.
Example 4
With reference to fig. 1 to 6, compared with any of the technical solutions of embodiments 1 to 3, the hydraulic power steering apparatus rotary valve of the present embodiment can be improved as follows: the outer wall of the input shaft 1 is provided with an annular groove 16, a first damping ring 17 and a second damping ring 18 are sequentially arranged in the annular groove 16 from inside to outside, the elasticity of the first damping ring 17 is larger than that of the second damping ring 18, and the friction coefficient of the second damping ring 18 is smaller than that of the second damping ring 18. The annular groove 16 is located between the clamping groove 15 and the oil discharge groove 11, the first damping ring 17 has good elasticity, high elasticity has a good vibration absorption function, high friction coefficient enables relatively stable matching between the input shaft 1 and the output shaft 2, the second damping ring 18 can reduce vibration of radial force between the input shaft 1 and the output shaft 2, circumferential resistance between the input shaft 1 and the output shaft 2 can be reduced, and the input shaft 1 and the output shaft 2 can rotate relatively, the first damping ring 17 in the embodiment is made of rubber, the second damping ring 18 is made of polytetrafluoroethylene, in other embodiments, the first damping ring 17 can be made of soft materials such as asbestos rubber, asbestos-free plates or graphite reinforcing plates.
Example 5
With reference to fig. 1 to 6, compared with any of the technical solutions of embodiments 1 to 4, the hydraulic power steering apparatus rotary valve of the present embodiment can be improved as follows: an oil guide groove 19 is arranged between the annular groove 16 and the oil discharge groove 11, and the annular groove 16 is communicated with the oil discharge groove 11 through the oil guide groove 19. The high-pressure oil in the oil discharge groove 11 flows into the annular groove 16 through the oil guide groove 19, and helps the first damping ring 17 to support the second damping ring 18, so that the effects of inhibiting the vibration of the input shaft 1 and the output shaft 2 and reducing abnormal sound are achieved.
Example 6
With reference to fig. 1 to 6, compared with any of the technical solutions of embodiments 1 to 5, the rotary valve of the hydraulic power steering apparatus of the present embodiment can be improved as follows: the cross section of the first damping ring 17 and the cross section of the second damping ring 18 are both rectangular. When the high-pressure oil in the oil discharge groove 11 flows into the annular groove 16, the high-pressure oil can help the first damping ring 17 to support the second damping ring 18, and when the low-pressure state is free from oil pressure, the rectangular first damping ring 17 can support the second damping ring 18 in a larger range, so that two ends of the second damping ring 18 cannot collapse. The cross-section of the second damping ring 18 can also be circular.
Example 7
With reference to fig. 1 to 6, compared with any of the technical solutions of embodiments 1 to 6, the rotary valve of the hydraulic power steering apparatus of the present embodiment can be improved as follows: the output shaft 2 includes a valve sleeve portion 25 and a screw portion 26 connected to the valve sleeve portion 25, the valve sleeve portion 25 is disposed on the periphery of the input shaft 1, and the oil inlet hole 21, the first oil hole 22 and the second oil hole 23 are all disposed on the valve sleeve portion 25.
Example 8
With reference to fig. 1 to 6, the rotary valve of the hydraulic power steering gear of the present embodiment can be improved as follows compared with any one of the technical solutions of embodiments 1 to 7: the plug 14 is of a spherical structure. The spherical structure provides a smaller friction force between the plug 14 and the stepped hole, which reduces the difficulty of pushing the plug 14 away in the reverse direction by high pressure, and in other embodiments, the plug 14 may have an oval, rhombic, square or other arc-shaped structure.
Example 9
With reference to fig. 1 to 6, compared with any of the technical solutions of embodiments 1 to 8, the hydraulic power steering apparatus rotary valve of the present embodiment can be improved as follows: still include the casing, form the cavity between casing and the screw rod portion 26, screw rod portion 26 periphery cover is equipped with steering nut, steering nut divide into first oil pocket and second oil pocket with the cavity, first oil pocket and first oilhole 22 intercommunication, the second oil pocket and the 23 intercommunications of second oilhole. When the steering wheel turns left, the oil pressure in the first oil cavity communicated with the first oil hole 22, which is flowed into the first oil hole 22 by the high-pressure oil through the oil discharge groove 11, is higher than that in the second oil hole 23, and the oil pressure in the first oil cavity communicated with the first oil hole 22 rises, so that the oil pressure pushes the steering nut on the screw rod part 26 to move rightwards, so that the low-pressure oil in the second oil cavity flows back through the oil return groove 12 by the second oil hole 23, and when the steering wheel turns right, the oil pressure in the second oil cavity communicated with the second oil hole 23, which is flowed into the second oil hole 23 by the high-pressure oil through the oil discharge groove 11, is higher than that in the first oil hole 22, and the oil pressure in the second oil cavity rises, so that the oil pressure pushes the steering nut on the screw rod part 26 to move rightwards and leftwards, so that the low-pressure oil in the first oil cavity flows back through the oil return groove 12 by the first oil hole 22.
Example 10
With reference to fig. 1 to 6, the rotary valve of the hydraulic power steering gear of the present embodiment can be improved as follows compared with any one of the technical solutions of embodiments 1 to 9: the inner wall of the input shaft 1 is provided with a groove, and the torsion bars 3 are respectively connected with the groove through positioning pins.
The present invention and its embodiments have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, without departing from the spirit of the present invention, a person of ordinary skill in the art should understand that the present invention shall not be limited to the embodiments and the similar structural modes without creative design.
Claims (10)
1. The rotary valve of the hydraulic power-assisted steering device is characterized by comprising an input shaft, a torsion bar and an output shaft, wherein one end of the torsion bar is connected with the input shaft, the other end of the torsion bar is connected with the output shaft, a sleeve of the output shaft, which is close to the input shaft, is sleeved on the periphery of the input shaft, an oil return groove and an oil discharge groove are arranged on the input shaft at intervals along the circumferential direction of the input shaft, an oil inlet hole, a first oil hole and a second oil hole are formed in the output shaft along the circumferential direction of the output shaft, the oil discharge groove is communicated with the oil inlet hole, two sides of the oil discharge groove are respectively communicated with the first oil hole and the second oil hole, two sides of the oil return groove are respectively communicated with the first oil hole and the second oil hole, the oil return groove is used for being communicated with an oil return cavity, at least one oil discharge groove is provided with a through hole communicated with the oil return cavity, and an end cap is movably arranged in the through hole.
2. The hydraulic power steering gear rotary valve according to claim 1, wherein the through hole comprises a first channel, a conical part and a second channel, the diameter of the first channel is larger than that of the second channel, the end with the larger diameter of the conical part is connected with the first channel, the end with the smaller diameter of the conical part is connected with the second channel, and the diameter of the plug is between the diameter of the first channel and the diameter of the second channel.
3. The rotary valve of a hydraulic power steering gear according to claim 1, wherein the input shaft is provided with a locking groove, the output shaft is provided with a locking protrusion which is matched with the locking groove, and the length of the locking groove is greater than that of the locking protrusion.
4. The rotary valve of a hydraulic power steering gear according to claim 4, wherein the outer wall of the input shaft is provided with an annular groove, a first damping ring and a second damping ring are sequentially arranged in the annular groove from inside to outside, the elasticity of the first damping ring is larger than that of the second damping ring, and the friction coefficient of the second damping ring is smaller than that of the second damping ring.
5. The rotary valve of a hydraulic power steering gear according to claim 1, wherein an oil guide groove is provided between the annular groove and the oil discharge groove, and the annular groove and the oil discharge groove are communicated through the oil guide groove.
6. The hydraulic power steering gear rotary valve according to claim 4 wherein the cross-section of the first damping band and the cross-section of the second damping band are both rectangular.
7. The hydraulic power steering apparatus rotary valve according to claim 1, wherein the output shaft includes a valve housing portion and a screw portion connected to the valve housing portion, the valve housing portion is disposed at an outer periphery of the input shaft, and the oil inlet hole, the first oil hole, and the second oil hole are all disposed at the valve housing portion.
8. The rotary valve of a hydraulic power steering gear according to claim 1, wherein the plug is of a spherical structure.
9. The hydraulic power steering rotary valve according to claim 1 further comprising a housing, wherein a cavity is formed between the housing and the screw portion, a steering nut is sleeved on the outer periphery of the screw portion, the steering nut divides the cavity into a first oil chamber and a second oil chamber, the first oil chamber is communicated with the first oil hole, and the second oil chamber is communicated with the second oil hole.
10. The rotary valve of a hydraulic power steering gear according to claim 1, wherein the input shaft is provided with a groove on an inner wall thereof, and the torsion bars are connected to the groove through dowel pins, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210428399.8A CN114750824A (en) | 2022-04-22 | 2022-04-22 | Rotary valve of hydraulic power-assisted steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210428399.8A CN114750824A (en) | 2022-04-22 | 2022-04-22 | Rotary valve of hydraulic power-assisted steering gear |
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| CN114750824A true CN114750824A (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210428399.8A Pending CN114750824A (en) | 2022-04-22 | 2022-04-22 | Rotary valve of hydraulic power-assisted steering gear |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116101370A (en) * | 2023-02-24 | 2023-05-12 | 浙江宸嘉液压科技有限公司 | Hydraulic steering gear rotary valve of commercial vehicle |
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| CN113071560A (en) * | 2021-04-13 | 2021-07-06 | 朝阳汽车转向器有限公司 | Damping noise reduction structure and damping noise reduction method for control valve of automobile hydraulic power steering gear |
| CN113184047A (en) * | 2021-05-18 | 2021-07-30 | 沙市久隆汽车动力转向器有限公司 | Rotary valve structure of recirculating ball power steering gear |
| CN113339344A (en) * | 2020-08-05 | 2021-09-03 | 博世汽车转向系统（济南）有限公司 | Relief valve reaches hydraulic pressure power assisted steering ware including it |
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2022
- 2022-04-22 CN CN202210428399.8A patent/CN114750824A/en active Pending
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| EP0749888A1 (en) * | 1995-06-23 | 1996-12-27 | NEW HOLLAND ITALIA S.p.A. | Control valve for a hydraulic steering system |
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| CN113339344A (en) * | 2020-08-05 | 2021-09-03 | 博世汽车转向系统（济南）有限公司 | Relief valve reaches hydraulic pressure power assisted steering ware including it |
| CN113071560A (en) * | 2021-04-13 | 2021-07-06 | 朝阳汽车转向器有限公司 | Damping noise reduction structure and damping noise reduction method for control valve of automobile hydraulic power steering gear |
| CN113184047A (en) * | 2021-05-18 | 2021-07-30 | 沙市久隆汽车动力转向器有限公司 | Rotary valve structure of recirculating ball power steering gear |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116101370A (en) * | 2023-02-24 | 2023-05-12 | 浙江宸嘉液压科技有限公司 | Hydraulic steering gear rotary valve of commercial vehicle |
| CN116101370B (en) * | 2023-02-24 | 2023-08-18 | 浙江宸嘉液压科技有限公司 | Hydraulic steering gear rotary valve of commercial vehicle |
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