CN215058540U - Flow self-adjusting stable hydraulic valve with pressure protection function for vehicle - Google Patents

Abstract

The utility model discloses a flow self-adjusting stable hydraulic valve for a vehicle with a pressure protection function, which has a compact structure and is designed with a main valve core and a pressure protection component, wherein the main valve core automatically compares the pressure force fed back by a pressure oil port with the spring force and switches to different working positions in real time to realize flow self-adjustment of the hydraulic valve and provide stable hydraulic oil for a vehicle steering mechanism; the pressure protection component can release part of pressure oil or all of the pressure oil, so that the safety of the hydraulic valve and the vehicle steering mechanism is protected; the valve body is provided with an oil port A connected with an engine oil pump, an oil port B connected with the motor oil pump, an oil port C connected with a vehicle steering mechanism and an oil port D connected with an oil tank; after the rotating speed of the vehicle engine rises, the hydraulic valve controls the hydraulic oil of the electric oil pump to flow back to the oil tank without resistance, the electric motor idles, the power is minimum, and energy conservation and consumption reduction are realized.

Description

Flow self-adjusting stable hydraulic valve with pressure protection function for vehicle

Technical Field

The utility model relates to a hydraulic pressure spare technical field for the vehicle specifically is a take flow self-interacting to stabilize hydrovalve for vehicle of pressure protection function.

Background

With the rapid development of economic construction in China, transportation becomes an artery for the sustainable development of national economy. Vehicles are an indispensable part of transportation. The running working condition of the vehicle is complex, especially the steering working condition of the heavy-duty vehicle, and the steering working condition changes in real time according to different road conditions, and the steering force required by the steering of the heavy-duty vehicle is larger. The method ensures the normal and safe operation of the vehicle steering mechanism, is an important link of vehicle design, and is also a main factor influencing the vehicle safety. In a heavy-duty vehicle, the current main flow mode is hydraulic power steering, but how to realize the stability of hydraulic control is always a difficult problem which troubles vehicle enterprises.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves is how to move according to vehicle steering mechanism, and the relation of the hydraulic pressure force of the automatic comparative pressure hydraulic fluid port feedback of hydrovalve and each spring force, case follow-up to switch to different operating position in real time, realize hydrovalve flow self-interacting, and provide vehicle steering mechanism with stable hydraulic oil, the flow self-interacting stabilizes the hydrovalve for the vehicle of the safe operation of guarantee vehicle steering of taking pressure protection function.

In order to solve the technical problem, the technical scheme adopted by the utility model is characterized in that the hydraulic valve has a compact structure, a main valve core and a pressure protection component are designed, the main valve core automatically compares the pressure with the spring force according to the hydraulic pressure fed back by a pressure oil port, and switches to different working positions in real time to realize the flow self-adjustment of the hydraulic valve; the pressure protection component can release part of pressure oil or all the pressure oil, so that the safety of the hydraulic valve is protected. After the rotating speed of the vehicle engine rises, the hydraulic valve controls the hydraulic oil of the electric oil pump to flow back to the oil tank without resistance, the electric motor idles, the power is minimum, and energy conservation and consumption reduction are realized; the valve body of the hydraulic valve is made of QT600 material, the pressure of the hydraulic valve can reach 250bar, and the hydraulic valve can be used by various vehicles.

A flow self-adjusting stable hydraulic valve with a pressure protection function for a vehicle structurally comprises an upper end cover, a lower end cover, a spring washer and a sealing ring, wherein the upper end cover is arranged on one side of a through hole of an upper valve body through an inner hexagonal screw and the spring washer II, and an O-shaped ring I seal is designed for preventing hydraulic oil from leaking; the upper valve body is provided with a through hole for installing the pressure protection assembly, and the pressure protection assembly is installed in the through hole of the upper valve body and is in clearance fit with the through hole; the pressure protection assembly consists of a valve rod, a spring IV, a pressure valve core, an O-shaped ring VIII, a valve seat and a locking nut, wherein the spring IV, the pressure valve core, the O-shaped ring VIII and the valve seat are sequentially arranged in the valve rod; the plug cover is arranged on the other side of the through hole of the upper valve body through an inner hexagon screw and a first elastic pad, and an O-shaped ring secondary seal is designed for preventing hydraulic oil from leaking; the plug cover is also used as a spring seat, the first spring is arranged between the plug cover and the pressure protection assembly, and the pressure protection assembly is pre-pressed at a designed position in the upper valve body; the throttle plug is installed in the upper valve body through threaded connection, and the diameter of a throttle hole E1 is 6 mm; the damping is installed in the upper valve body through threaded connection, and the diameter of a damping hole F is 1 mm; the plug screw passes through threaded connection and installs on last valve body, seals through the sealing member from taking, prevents that hydraulic oil from leaking.

Preferably, the upper valve body is connected with the lower valve body through a socket head cap screw and a third elastic pad, and an O-ring III, an O-ring IV and an O-ring V are designed between the upper valve body and the lower valve body for preventing hydraulic oil from leaking.

Furthermore, the lower valve body is designed with two pore channels, namely an upper pore channel and a lower pore channel, wherein the upper pore channel is used for installing the main valve core, and the lower pore channel is used for installing the one-way valve core.

Preferably, the one-way valve core is in clearance fit with a pore passage of the lower valve body, one end of the one-way valve core is in contact with the lower valve body, a sealing surface is formed on the contact surface to prevent hydraulic oil from flowing reversely, and a spring III is arranged at the other end of the one-way valve core; the main valve core is provided with an orifice E2 with the diameter of 6.5mm, the orifice is in clearance fit with a pore passage of the lower valve body, one end of the orifice is limited by an elastic retainer ring through the pore, the other end of the orifice is provided with a second spring, and the second spring is arranged between the main valve core and a spring seat to pre-press the main valve core in the lower valve body.

Preferably, the spring seat is provided with an O-shaped ring six in an installing and designing mode, so that hydraulic oil is prevented from leaking; the lower end cover is arranged on the lower valve body through a hexagon socket head cap screw and a spring washer II, and an O-shaped ring is designed to prevent hydraulic oil from leaking.

Preferably, in order to meet the requirements of vehicle models, the throttle holes E2 of the main valve core and the throttle plug can be designed into different specifications, different outlet flow rates are designed, and the flow rate corresponding to the design specification of the hydraulic valve is 50L/min.

Preferably, the valve body is provided with an oil port A connected with an engine oil pump, an oil port B connected with an electric motor oil pump, an oil port C connected with a vehicle steering mechanism and an oil port D connected with an oil tank.

The utility model discloses its pressure of valve body can reach 250bar, satisfies various vehicles and uses. The hydraulic valve is compact in structure, and is provided with a main valve core and a pressure protection assembly, the main valve core automatically compares the hydraulic pressure fed back by the pressure oil port with the spring force, and switches to different working positions in real time, so that the flow self-adjustment of the hydraulic valve is realized, and stable hydraulic oil is supplied to a vehicle steering mechanism; the pressure protection component can release part of pressure oil or all of the pressure oil, so that the safety of the hydraulic valve and the vehicle steering mechanism is protected; after the rotating speed of the vehicle engine rises, the hydraulic valve controls the hydraulic oil of the electric oil pump to flow back to the oil tank without resistance, the electric motor idles, the power is minimum, and energy conservation and consumption reduction are realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

FIG. 1 is a schematic diagram of a flow self-regulating stabilizing hydraulic valve;

FIG. 2 is a schematic view of the left side of the structure of FIG. 1;

FIG. 3 is a diagram of a pressure protection assembly;

FIG. 4 is a schematic illustration of a hydraulic valve home position;

FIG. 5 is a schematic diagram of a flow self-adjusting stabilizing hydraulic valve usage connection;

FIG. 6 is a schematic diagram of a hydraulic valve operating condition one position configuration;

FIG. 7 is a schematic diagram of a two-position configuration of hydraulic valve operating conditions;

FIG. 8 is a schematic diagram of a two position hydraulic valve operating condition;

FIG. 9 is a schematic diagram of a three-position configuration of hydraulic valve operating conditions;

FIG. 10 is a schematic illustration of a three position principle of hydraulic valve operation;

FIG. 11 is a schematic structural diagram of a safety valve of the pressure protection assembly participating in the working position under the second working condition;

FIG. 12 is a schematic diagram of the working position of the safety valve of the pressure protection assembly under the second working condition

FIG. 13 is a schematic diagram of the working position of the pressure protection assembly under the second working condition;

reference numerals:

1-upper end cover; 2-an upper valve body; 3-a pressure protection component; 3.1-valve stem; 3.2-spring four; 3.3-pressure spool; 3.4-eighth O-ring; 3.5-valve seat; 3.6-locking nut; 3.7-pressure equalizing groove; 4-a throttle plug; 5, damping; 6-plug screw; 7-a first spring; 8-blocking the cover; 9-a socket head cap screw and a spring washer I; 10-a lower valve body; 11-circlip for hole; 12-main spool; 13-spring two; 14-a spring seat; 15-one-way valve core; 16-spring three; 17-lower end cap; 18-inner hexagonal screw and elastic pad II; 19-O-shaped ring I; 20-O-shaped ring II; 21-O-shaped ring III; 22-O-shaped ring IV; 23-O-shaped ring five; 24-O-shaped ring six; 25-O-shaped ring seven; 26-inner hexagon screw and elastic cushion III; a-oil port A, B-oil port B, C-oil port C and D-oil port D; e1-orifice E1;

e2-orifice E2; f-damping hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-13, the structure of the flow self-adjusting and stabilizing hydraulic valve for a vehicle with pressure protection function of the present invention includes that an upper end cover 1 is installed at one side of a through hole of an upper valve body 2 through an inner hexagon screw and an elastic cushion 18, and an O-ring one 19 is designed for preventing hydraulic oil from leaking; a through hole for installing the pressure protection component 3 is processed on the upper valve body 2, and the pressure protection component 3 is installed in the through hole of the upper valve body 2 and is in clearance fit with the through hole;

the pressure protection component 3 consists of a valve rod 3.1, a spring four 3.2, a pressure valve core 3.3, an O-shaped ring eight 3.4, a valve seat 3.5 and a locking nut 3.6, wherein the valve rod 3.1 is internally and sequentially provided with the spring four 3.2, the pressure valve core 3.3, the O-shaped ring eight 3.4 and the valve seat 3.5, the valve seat 3.5 is connected with the valve rod 3.1 through threads, the locking nut 3.6 is connected with the valve seat 3.5 through threads, and the surface of the valve rod 3.1 is provided with a pressure equalizing groove 3.7 for preventing the valve rod 3.1 from moving and blocking; the blocking cover 8 is arranged on the other side of the through hole of the upper valve body 2 through an inner hexagon screw and an elastic gasket I9, and an O-shaped ring II 20 is designed for sealing so as to prevent hydraulic oil from leaking; the blocking cover 8 is also used as a spring seat, the spring I7 is arranged between the blocking cover 8 and the pressure protection component 3, and the pressure protection component 3 is pre-pressed at a designed position in the upper valve body 2; the throttle plug 4 is installed in the upper valve body 2 through threaded connection, and the diameter of a throttle hole E1 is 6 mm; the damper 5 is installed in the upper valve body 2 through threaded connection, and the diameter of a damping hole F is 1 mm; the screw plug 6 is installed on the upper valve body 2 through threaded connection, and is sealed through a sealing piece arranged on the screw plug, so that hydraulic oil is prevented from leaking.

In a specific implementation process, the upper valve body 2 is connected with the lower valve body 10 through a socket head cap screw and a third elastic pad 26, and an O-ring three 21, an O-ring four 22 and an O-ring five 23 are designed between the upper valve body 2 and the lower valve body 10 to prevent hydraulic oil from leaking.

In a specific implementation process, the lower valve body 10 is designed with two pore passages, namely an upper pore passage and a lower pore passage, wherein the upper pore passage is used for installing the main valve element 12, and the lower pore passage is used for installing the check valve element 15.

In the specific implementation process, the one-way valve core 15 is in clearance fit with a pore channel of the lower valve body 10, one end of the one-way valve core is in contact with the lower valve body 10, a sealing surface is formed on a contact surface to prevent hydraulic oil from flowing reversely, and a spring III 16 is arranged at the other end of the one-way valve core; main valve element 12 is machined with an orifice E2 with a diameter of 6.5mm, the orifice is in clearance fit with a pore passage of lower valve element 10, one end of the orifice is limited by circlip 11, the other end of the orifice is provided with a second spring 13, and the second spring 13 is arranged between main valve element 12 and spring seat 14, so as to pre-press main valve element 12 in lower valve element 10.

In a specific implementation process, the spring seat 14 is provided with an O-shaped ring six 24 in an installing and designing mode, so that hydraulic oil is prevented from leaking; the lower end cover 17 is installed on the lower valve body 10 through a hexagon socket head cap screw and a second elastic pad 18, and is provided with an O-shaped ring seven 25 to prevent hydraulic oil from leaking.

In the specific implementation process, in order to meet the requirements of vehicle models, the throttle hole E1 of the throttle plug 4 and the throttle hole E2 of the main valve element 12 can be designed into different specifications, different outlet flow rates are designed, and the flow rate corresponding to the design specification of the hydraulic valve is 50L/min.

In the specific implementation process, an oil port A connected with an engine oil pump, an oil port B connected with an electric motor oil pump, an oil port C connected with a vehicle steering mechanism and an oil port D connected with an oil tank are designed on the valve body.

The vehicle is provided with an oil pump driven by an engine and an oil pump driven by a motor, and the flow of the oil pump of the motor is matched with the flow required by a steering mechanism of the vehicle. When the hydraulic valve is used, an oil port A of the hydraulic valve is connected with an engine oil pump, an oil port B of the hydraulic valve is connected with an electric oil pump, an oil port C of the hydraulic valve is connected with a vehicle steering mechanism, and an oil port D of the hydraulic valve is connected with an oil return tank (the schematic diagram of the principle of the initial position of the hydraulic valve is shown in figure 4, and the schematic diagram of the use connection is shown in figure 5). After the vehicle is started, the motor is started, and the engine has different rotating speeds according to different working condition states. The utility model discloses an below according to different work condition, combine the vehicle of taking pressure protect function to use from the stable hydrovalve of flow self-interacting, right the utility model discloses do further explanation:

the working condition I is as follows: the motor is started and the engine is not yet started.

Hydraulic oil of the electric oil pump enters the hydraulic valve through the oil port B, overcomes the spring force of the spring III 16, opens the check valve core 15, and enters the oil port C through a hole passage of the hydraulic valve and the throttling hole E1 of the throttling plug 4 (the schematic structural diagram of the working condition is shown in figure 6). The oil entering the vehicle steering mechanism is all provided by the electric motor oil pump.

Working conditions are as follows: the motor is started and the engine speed is low.

And hydraulic oil of the motor oil pump passes through the oil port B, and hydraulic oil of the engine oil pump passes through the oil port C and simultaneously enters the hydraulic valve. Hydraulic oil of the oil port B overcomes the spring force of the spring III 16, the one-way valve core 15 is opened, and the hydraulic oil enters the oil port C through a hole passage of the hydraulic valve and a throttling hole of the throttling plug 4; the hydraulic oil of the oil port C enters the oil port C through the throttling hole of the main valve core 12, the hydraulic valve hole passage and the throttling hole of the throttling plug 4. Along with the increase of the rotating speed of the engine, the flow of the hydraulic oil entering the oil port A is increased, the hydraulic oil passing through the throttling hole of the main valve core is more and more, the oil pressure of the inlet of the oil port A is gradually increased, the spring force of the second spring 13 is gradually overcome, and the main valve core 12 is pushed to move leftwards. When the main valve core moves to the oil port B and is communicated with the oil port D, a part of hydraulic oil of the oil port B enters the oil port D and flows back to the direct oil tank (the schematic diagram of the working condition structure is shown in figure 7, and the schematic diagram of the working condition position principle of the hydraulic valve is shown in figure 8). At the moment, oil entering the steering mechanism of the vehicle is provided by the motor oil pump and the engine oil pump together.

Working conditions are as follows: and starting the motor, and enabling the rotating speed of the engine to reach the rated rotating speed.

Along with the continuous increase of the rotating speed of the engine, when the rotating speed reaches the rated rotating speed, the flow of the hydraulic oil entering the oil port A reaches the maximum, the oil pressure at the inlet of the oil port A overcomes the spring force of the second spring 13, and the main valve core 12 is pushed to move leftwards to be pressed on the spring seat 14. At the moment, the communicating opening of the oil port B and the oil port D is enlarged, the pressure of the hydraulic oil of the oil port B is insufficient to overcome the spring force of the spring III 16, all the hydraulic oil of the oil port B enters the oil port D, the hydraulic oil flows back to the oil tank without resistance, and the motor idles and has the minimum power. The hydraulic oil pressure of the oil port C and the spring force of the spring III 16 press the check valve core 15 against the lower valve body (the working condition structure schematic diagram is shown in fig. 9, and the working condition position principle schematic diagram of the hydraulic valve is shown in fig. 10). The oil entering the vehicle steering mechanism is all provided by the engine oil pump.

When the steering mechanism is blocked, the pressure of the oil port C is instantaneously increased and exceeds the pressure value set by the pressure protection assembly spring IV 3.2, the pressure oil pushes the pressure valve core 3.3 away through the damping hole of the damper 5, part of the pressure oil returns to the oil port D, the instantaneously increased pressure is released, and the safety of the hydraulic valve and the steering mechanism is protected (taking the working condition II as an example, the schematic position structure diagram is shown in figure 11). When the steering mechanism fails and cannot act, and part of oil can not be released through the pressure valve core 3.3, the pressure which is increased continuously pushes the compression spring I7 of the pressure protection assembly 3 to move rightwards, the pressure oil pipeline is communicated with the oil return opening D, and the redundant pressure oil flows into the oil return opening D. According to the pressure feedback of the oil port C, the position of the pressure protection assembly 3 is adjusted in real time, and the oil port C is kept constant in pressure for working (taking the working condition two as an example, the schematic diagram of the position structure is shown in FIG. 12, and the schematic diagram of the principle is shown in FIG. 13). When the fault is eliminated, the pressure protection component 3 is reset under the spring force of the first spring 7.

The operation positions and the operation mechanism of the hydraulic valve are introduced according to the working conditions. In the actual use process, the action of the vehicle steering mechanism is complex, and all working conditions are often switched back and forth. The hydraulic valve automatically compares the relation between the hydraulic pressure of the pressure oil port and each spring force according to the action of the steering mechanism, and switches to different working positions in real time in a follow-up manner, so that different functions are realized, the flow self-adjustment of the hydraulic valve is realized, stable hydraulic oil is supplied to the vehicle steering mechanism, and the safe operation of vehicle steering is guaranteed.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. The utility model provides a take flow self-interacting to stabilize hydrovalve for vehicle of pressure protection function which characterized in that: the structure of the hydraulic oil leakage prevention valve comprises an upper end cover, a lower end cover and a spring washer II, wherein the upper end cover is arranged on one side of a through hole of an upper valve body through an inner hexagon screw and the spring washer II, and an O-shaped ring I seal is designed for preventing hydraulic oil from leaking; the upper valve body is provided with a through hole for installing the pressure protection assembly, and the pressure protection assembly is installed in the through hole of the upper valve body and is in clearance fit with the through hole; the plug cover is arranged on the other side of the through hole of the upper valve body through an inner hexagon screw and a first elastic pad, and an O-shaped ring secondary seal is designed for preventing hydraulic oil from leaking; the plug cover is also used as a spring seat, the first spring is arranged between the plug cover and the pressure protection assembly, and the pressure protection assembly is pre-pressed at a designed position in the upper valve body; the throttle plug is installed in the upper valve body through threaded connection, and the diameter of a throttle hole E1 is 6 mm; the damping is installed in the upper valve body through threaded connection, and the diameter of a damping hole F is 1 mm; the plug screw passes through threaded connection and installs on last valve body, seals through the sealing member from taking, prevents that hydraulic oil from leaking.

2. The vehicular flow self-regulation and stabilization hydraulic valve with the pressure protection function according to claim 1, characterized in that: the upper valve body is connected with the lower valve body through a hexagon socket head cap screw and a third elastic pad, and an O-shaped ring III, an O-shaped ring IV and an O-shaped ring V are designed between the upper valve body and the lower valve body for preventing hydraulic oil from leaking.

3. The vehicular flow self-regulation and stabilization hydraulic valve with the pressure protection function according to claim 2, characterized in that: the lower valve body is provided with two pore channels, namely an upper pore channel and a lower pore channel, wherein the upper pore channel is used for installing the main valve core, and the lower pore channel is used for installing the one-way valve core.

4. The vehicular flow self-regulation and stabilization hydraulic valve with the pressure protection function according to claim 3, characterized in that: the one-way valve core is in clearance fit with a pore passage of the lower valve body, one end of the one-way valve core is in contact with the lower valve body, a sealing surface is formed on the contact surface to prevent hydraulic oil from flowing reversely, and a spring III is arranged at the other end of the one-way valve core; the main valve core is provided with an orifice E2 with the diameter of 6.5mm, the orifice is in clearance fit with a pore passage of the lower valve body, one end of the orifice is limited by an elastic retainer ring through the pore, the other end of the orifice is provided with a second spring, and the second spring is arranged between the main valve core and a spring seat to pre-press the main valve core in the lower valve body.

5. The vehicular flow self-regulation and stabilization hydraulic valve with the pressure protection function according to claim 4, is characterized in that: an O-shaped ring six is arranged and designed on the spring seat to prevent hydraulic oil from leaking; the lower end cover is arranged on the lower valve body through a hexagon socket head cap screw and a spring washer II, and an O-shaped ring is designed to prevent hydraulic oil from leaking.

6. The vehicular flow self-regulation and stabilization hydraulic valve with the pressure protection function according to claim 1, characterized in that: the valve body is provided with an oil port A connected with an engine oil pump, an oil port B connected with the motor oil pump, an oil port C connected with a vehicle steering mechanism and an oil port D connected with an oil tank.

7. The vehicular flow self-regulation and stabilization hydraulic valve with the pressure protection function according to claim 1, characterized in that: the pressure protection assembly comprises a valve rod, a spring IV, a pressure valve core, an O-shaped ring VIII, a valve seat and a locking nut, wherein the spring IV, the pressure valve core, the O-shaped ring VIII and the valve seat are sequentially arranged in the valve rod, the valve seat is in threaded connection with the valve rod, the locking nut is in threaded connection with the valve seat, and a pressure equalizing groove for preventing the valve rod from moving and blocking is designed on the surface of the valve rod.

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