CN207795725U

CN207795725U - Oil pump control valve and vehicle

Info

Publication number: CN207795725U
Application number: CN201820171029.XU
Authority: CN
Inventors: 孙玉; 刘亚龙; 陈浩; 贾凯敏
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2018-01-31
Filing date: 2018-01-31
Publication date: 2018-08-31
Anticipated expiration: 2028-01-31

Abstract

The utility model is related to the field of steering mechanism, a kind of oil pump control valve and vehicle are provided, wherein the oil pump control valve includes：The first end of shell, the shell is provided with oil outlet and second end is provided with end cap, and valve chamber and pressure-releasing chamber are provided in the shell；Spool, is provided with oil back chamber in the spool, and what the spool was provided with the first opening being connected to the oil back chamber and be connected to the oil back chamber second is open；First check valve, first check valve are arranged in the form of positive entrance is towards the entrance of the pressure-releasing chamber in the pressure-releasing chamber；Second check valve, second check valve are arranged in the form of positive entrance is towards first opening in the oil back chamber.Two check valves are arranged in oil pump control valve described in the utility model on oil return path, and the probability for reducing check valve while being not normally functioning by impurity effect improves the reliability of oil pump control valve.

Description

Oil pump control valve and vehicle

Technical field

The utility model is related to the technical field of vehicle steering mechanism, more particularly to a kind of oil pump control valve and vehicle.

Background technology

Vehicle hydraulic power steering includes steering wheel, steering column, turns to belt, steering pump, steering gear, steering The components such as oil tank, steering oil pipe, wherein it includes steering pump, steering gear, steering reservoir, steering oil pipe etc. to turn to oil circuit.

Steering pump includes control valve, is provided with what spool, check valve etc. were moved according to hydraulic oil variation in control valve Component, due to being inevitably present some impurity in hydraulic oil, when the larger impurity of particle reaches the components such as spool, check valve Sealing surface when, influence the sealing effect of these components, even result in component casey, failure, so that control valve is lost adjustment effect, Final Vehicular turn assist function failure, brings security risk.

Utility model content

In view of this, the utility model is directed to a kind of oil pump control valve, it is easy by miscellaneous with solving oil pump control valve The problem of matter is influenced and is blocked.

In order to achieve the above objectives, the technical solution of the utility model is realized in：

A kind of oil pump control valve, which is characterized in that the oil pump control valve includes：

The shell of tubular, the first end of the shell is provided with oil outlet and second end is provided with end cap, in the shell It is provided with the partition board extended from the end cap to the oil outlet, the enclosure interior is divided into axially extending by the partition board Valve chamber and pressure-releasing chamber, the partition board are provided with the connecting hole of perforation close to the position of the end cap, on the peripheral surface of the shell It is provided with the oil inlet and oil return opening being connected to the valve chamber；

Spool, the spool can move axially in the valve chamber, and axially extending oil return is provided in the spool Chamber is provided with the first opening being connected to the oil back chamber on the end face of the direction end cap of the spool, the spool The second opening being connected to the oil back chamber is provided on peripheral surface, first open communication is in the connecting hole, the valve Core can move to be connected to make second opening be aligned with the oil return opening；

First check valve, first check valve are arranged in the form of positive entrance is towards the entrance of the pressure-releasing chamber in institute It states in pressure-releasing chamber；

Second check valve, second check valve are arranged in the form of positive entrance is towards first opening at described time In oil pocket.

Further, first opening is provided with the first filter screen.

Further, it is provided with resilient bias between the spool and the end cap.

Further, the oil inlet is close to the outlet of the valve chamber, outlet of the oil return opening far from the valve chamber, institute Stating spool can move between first position, the second position and the third place, and in the first position, the spool is partly Between the oil inlet and the oil return opening, the oil inlet and the oil return opening are separated by the spool；Described The second position, between the oil return opening and the end cap, the oil inlet is connected to the spool with the oil return opening；Institute State the third place, the spool partly blocks the oil return opening close to the side of the end cap, second opening portion It is aligned the oil return opening, first check valve and second check valve are opened.

Further, the oil pump control valve includes valve rod, and the valve rod is connected to the spool and axially extends to institute The outlet of valve chamber is stated, the valve rod includes the flow-rate adjustment bar portion being arranged in the outlet of the valve chamber, the flow control rod Portion includes the first bar portion far from the spool and the second bar portion close to the spool, and the outer diameter of first bar portion is more than institute State the outer diameter of the second bar portion.

Further, the second filter screen being provided in the valve chamber between the oil inlet and the oil return opening, Second filter screen is provided with centre bore, and the valve rod slidably and sealingly passes through the centre bore.

Further, the outlet of the valve chamber is provided with valve deck, and the valve deck is formed with valve opening, the flow-rate adjustment bar portion It is arranged across the valve opening, the internal diameter of the valve opening is more than the outer diameter of first bar portion, in the first position and described the Three positions, second bar portion passes through the valve opening, and in the second position, first bar portion passes through the valve opening.

Further, the valve rod includes the main body bar portion between second bar portion and the spool, the master The outer diameter in body rod portion is more than the internal diameter of the valve opening, and the main body bar portion passes through the centre bore.

Further, the end cap is provided with the installing port being connected to the pressure-releasing chamber, and being provided in the installing port can The sealing element of dismounting.

Compared with the existing technology, oil pump control valve described in the utility model has the advantage that：

Two check valves are arranged on oil return path, it is same to reduce check valve for oil pump control valve described in the utility model When the probability that is not normally functioning by impurity effect, improve the reliability of oil pump control valve.

The another object of the utility model is to propose a kind of vehicle, and the oil pump control valve to solve vehicle is easy by miscellaneous The problem of matter is influenced and is blocked.

A kind of vehicle, the vehicle include steering pump, wherein the steering pump is provided with the oil described in above scheme Pump control valve.

Possessed advantage is identical compared with the existing technology with above-mentioned oil pump control valve for the vehicle, and details are not described herein.

Other features and advantages of the utility model will be described in detail in subsequent specific embodiment part.

Description of the drawings

The attached drawing for constituting the part of the utility model is used to provide a further understanding of the present invention, this practicality is new The exemplary embodiment and its explanation of type are not constituted improper limits to the present invention for explaining the utility model. In the accompanying drawings：

Fig. 1 is the sectional view of the oil pump control valve described in the utility model embodiment, and wherein spool is located at first position；

Fig. 2 is the sectional view of the oil pump control valve described in the utility model embodiment, and wherein spool is located at the second position；

Fig. 3 is the sectional view of the oil pump control valve described in the utility model embodiment, and wherein spool is located at the third place.

Reference sign：

1- shells, 2- end caps, 3- oil outlets, 4- partition boards, 5- oil inlets, 6- oil return openings, 7- spools, the first check valves of 8-, The second check valves of 9-, the first filter screens of 10-, the second filter screens of 11-, 12- valve rods, the first bar portions of 13-, the second bar portions of 14-, 15- Main body bar portion, 16- valve decks, 17- sealing elements, 18- connecting holes.

Specific implementation mode

It should be noted that in the absence of conflict, the spy in embodiment and embodiment in the utility model Sign can be combined with each other.

The utility model is described in detail below with reference to the accompanying drawings and in conjunction with embodiment.

The utility model provides a kind of oil pump control valve, wherein the oil pump control valve includes：

The first end of the shell 1 of tubular, the shell 1 is provided with oil outlet 3 and second end is provided with end cap 2, the shell The partition board 4 extended from the end cap 2 to the oil outlet 3 is provided in body 1, the partition board 4 will be divided into inside the shell 1 Axially extending valve chamber and pressure-releasing chamber, the partition board 4 is provided with the connecting hole 18 of perforation close to the position of the end cap 2, described The oil inlet 5 being connected to the valve chamber and oil return opening 6 are provided on the peripheral surface of shell 1；

Spool 7, the spool 7 can move axially in the valve chamber, and axially extending return is provided in the spool 7 Oil pocket is provided with the first opening being connected to the oil back chamber, the valve on the end face of the direction of the spool 7 end cap 2 The second opening being connected to the oil back chamber is provided on the peripheral surface of core 7, first open communication in the connecting hole 18, The spool 7 can move to be connected to make second opening be aligned with the oil return opening 6；

First check valve 8, first check valve 8 are arranged in the form of positive entrance is towards the entrance of the pressure-releasing chamber In the pressure-releasing chamber；

Second check valve 9, second check valve 9 are arranged in the form of positive entrance is towards first opening described In oil back chamber.

The oil pump control valve of this programme can be installed on steering pump and to turning machine provide hydraulic oil, oil inlet 5 and return Hydraulic fluid port 6 is connected to for oil vessel, and oil outlet 3 is connected to turning machine by oil pipe.Wherein, oil inlet 5, oil return opening 6 and oil outlet 3 It communicates with each other, when the pressure at oil outlet 3 is more than the pressure in the valve chamber, shows that outside does not need fuel feeding, at this point, first Check valve 8 and the second check valve 9 can be opened, and hydraulic oil passes through the outlet of the valve chamber after oil inlet 5 enters the valve chamber Into the entrance of the pressure-releasing chamber, pass sequentially through the first check valve 8, connecting hole 18, first opening, second opening, Oil return opening 6 and back to for oil vessel, avoid oil pump control valve internal pressure excessive and damage.

The valve chamber can be divided into two parts in an axial direction by spool 7, be located at 7 both sides of spool two parts substantially each other every From.Pass through the movement of spool 7, thus it is possible to vary the connected state of oil inlet 5 and oil return opening 6, to change the work of oil pump control valve Make state, will be detailed below.

Wherein, it is inevitably present impurity in hydraulic oil, the influence in order to avoid impurity to oil pump control valve, this programme Provided with two check valves, the probability that the first check valve 8 and the second check valve 9 are blocked by impurity simultaneously and are unable to normal switching-off is remote Much smaller than the probability that single check valve is blocked by impurity, ensure oil pump control valve normal operation.

Wherein, the first check valve 8 can be opened in the case where reaching pressure threshold, and hydraulic oil is allowed to be let out from described The entrance of chamber is pressed to be flowed towards connecting hole 18；Second check valve 9 can be opened in the case where reaching pressure threshold, and be allowed Hydraulic oil is open from described first towards second open flow.

In addition, first opening is provided with the first filter screen 10.First filter screen 10 is used for entering oil back chamber Hydraulic oil is filtered, and prevents impurity from entering the second check valve 9, ensures that the second check valve 9 can be opened and closed normally.Or The first filter screen of person 10 can also be arranged in the positive inlet of second check valve 9, as long as the pressure release can will be come from The hydraulic oil of chamber is filtered.

In addition, being provided with resilient bias between the spool 7 and the end cap 2.The resilient bias can be bullet Spring or other elastic constructions, the hydraulic oil of the valve chamber is entered by oil inlet 5 can overcome the bullet to the effect of 7 pressure of spool The bias effect of property bias piece, and spool 7 is moved to end cap 2.

Specifically, the oil inlet 5 is close to the outlet of the valve chamber, outlet of the oil return opening 6 far from the valve chamber, institute Stating spool 7 can move between first position, the second position and the third place, in the first position, 7 part of the spool Between the oil inlet 5 and the oil return opening 6, the oil inlet 5 and the oil return opening 6 are separated by the spool 7 on ground； In the second position, the spool 7 is between the oil return opening 6 and the end cap 2, the oil inlet 5 and the oil return Mouth 6 is connected to；In the third place, the spool 7 partly blocks the oil return opening 6 close to the side of the end cap 2, described It is aligned to second opening portion the oil return opening 6, first check valve 8 and second check valve 9 are opened.

As shown in Figure 1, spool 7 is in the first position (extreme position substantially far from end cap 2), the one of spool 7 Part is located at the left side of oil inlet 5, to which oil inlet 5 and oil return opening 6 be separated, enters the valve chamber by oil inlet 5 Hydraulic oil, other devices, such as turning machine are output to by oil outlet 3, at this point, at the first check valve 8 and the second check valve 9 In closed state, the oil pump control valve is in flow full dose discharge state, and hydraulic oil at this time can wash away the first filter screen Impurity on 10 carries impurity and is discharged by oil outlet 3.

As shown in Fig. 2, spool 7 is in the second position (extreme position for substantially leaning on proximal cover 2), spool 7 is located at The right side (right part that can partly block oil return opening 6) of oil return opening 6, oil inlet 5 and oil return opening 6 communicate with each other, and pass through The hydraulic oil part that oil inlet 5 enters the valve chamber is discharged by oil outlet 3, and another part is returned to by oil return opening 6 and supplied Oil vessel, the oil pump control valve are in flow and largely spue state (not all discharge).

As shown in figure 3, spool 7 is in the third place between the first position and the second position, spool 7 Partly block the right side of oil return opening 6, and second opening is aligned oil return opening 6 at least partly, the first check valve 8 and the Two check valves 9 open simultaneously, and the pressure at oil outlet 3 is more than the pressure in the valve chamber, the hydraulic oil from oil inlet 5 at this time A part by the valve chamber outlet enter the pressure-releasing chamber entrance, pass sequentially through the first check valve 8, connecting hole 18, First opening, second opening, oil return opening 6 and back to for oil vessel, another portion of the hydraulic oil from oil inlet 5 Divide and directly reach oil return opening 6 and return for oil vessel, the oil pump control valve is in pressure release state, and the first filter screen 10 can be right Oil return is filtered, and reduces the impurity into the second check valve 9.

Wherein, second opening extends radially outwardly into the peripheral surface of spool 7, the periphery of spool 7 from the oil back chamber The annular groove of circumferentially extending is formed on face, the annular groove and second open communication increase by second opening in axial direction On width dimensions.

In addition, the oil pump control valve includes valve rod 12, the valve rod 12 is connected to the spool 7 and axially extends to institute The outlet of valve chamber is stated, the valve rod 12 includes the flow-rate adjustment bar portion being arranged in the outlet of the valve chamber, the flow-rate adjustment Bar portion includes the second bar portion 14 of the first bar portion 13 and the close spool 7 far from the spool 7, first bar portion 13 Outer diameter is more than the outer diameter of second bar portion 14.By the way that selectively the first bar portion 13 of various outer diameter and the second bar portion 14 are inserted Enter into the outlet of the valve chamber, the circulation area in the exit of the valve chamber, i.e., the section of the described valve chamber outlet can be adjusted The difference of the sectional area of product and the first bar portion 13 or the second bar portion 14, to adjust the flow in the exit of the valve chamber.

Specifically, the second filter screen being provided in the valve chamber between the oil inlet 5 and the oil return opening 6 11, second filter screen 11 is provided with centre bore, and the valve rod 12 slidably and sealingly passes through the centre bore.Such as figure Shown in 1- Fig. 3, the second filter screen 11 is provided in the valve chamber, the second filter screen 11 is located at spool 7 and is exported towards the valve chamber Side the hydraulic oil for flowing to oil return opening 6 from oil inlet 5 can be filtered, be kept away between oil inlet 5 and oil return opening 6 Exempt from or reduce impurity flow to spool 7 nearby and influence axial movement of the spool 7 in the valve chamber.

In addition, the outlet of the valve chamber is provided with valve deck 16, the valve deck 16 is formed with valve opening, the flow-rate adjustment bar portion It is arranged across the valve opening, the internal diameter of the valve opening is more than the outer diameter of first bar portion 13, in the first position and described The third place, second bar portion 14 passes through the valve opening, and in the second position, first bar portion 13 passes through the valve Hole.As shown in Figure 1-Figure 3, there is larger outlet by the valve chamber that partition board 4 is separated to form, therefore valve deck can be set 16, and axially extending valve opening is set on valve deck 16 so that the internal diameter of valve opening is more suitable for the first bar portion 13 and the second bar portion 14.Particularly, valve deck 16 can be integrally connected to the first end of tubular structure, the second end of the tubular structure be formed with it is described go out Hydraulic fluid port 3, and the trepanning being connected to the entrance of the pressure-releasing chamber is formed on the peripheral wall of the tubular structure, the second filter screen 12 with Elastic component is provided between valve deck 16, the second filter screen 12 is biased into the step surface in the valve chamber by biasing force by elastic component On.

In addition, the valve rod 12 includes the main body bar portion 15 between second bar portion 14 and the spool 7, it is described The outer diameter of main body bar portion 15 is more than the internal diameter of the valve opening, and the main body bar portion 15 passes through the centre bore.Main body bar portion 15 with Annular step surface is formed between second bar portion 14, the internal diameter of the valve opening of valve deck 16 is less than the outer diameter of main body bar portion 15, to Valve rod 12 can be prevented to be detached from from the valve chamber with the annular step surface between backstop main body bar portion 15 and the second bar portion 14.

In addition, the end cap 2 is provided with the installing port being connected to the pressure-releasing chamber, it is provided in the installing port detachable Sealing element 17.By the installing port, the first check valve 8 can be installed in the pressure-releasing chamber, sealing element 17 can be close Seal the installing port.

In addition, the utility model additionally provides a kind of vehicle, the vehicle includes steering pump, wherein the steering oil Pump is provided with the oil pump control valve described in above scheme.Oil pump control valve is installed on the steering pump of vehicle and passes through piping connection In the turning machine of vehicle, the hydraulic fluid flow rate that steering pump is provided to turning machine can be controlled.

The foregoing is merely the better embodiments of the utility model, are not intended to limit the utility model, it is all Within the spirit and principles of the utility model, it is new to should be included in this practicality for any modification, equivalent replacement, improvement and so on Within the protection domain of type.

Claims

1. a kind of oil pump control valve, which is characterized in that the oil pump control valve includes：

The first end of the shell (1) of tubular, the shell (1) is provided with oil outlet (3) and second end is provided with end cap (2), institute The partition board (4) for being provided in shell (1) and extending from the end cap (2) to the oil outlet (3) is stated, the partition board (4) will be described Axially extending valve chamber and pressure-releasing chamber are divided into inside shell (1), the partition board (4) is arranged close to the position of the end cap (2) There is the connecting hole (18) of perforation, the oil inlet (5) being connected to the valve chamber and oil return are provided on the peripheral surface of the shell (1) Mouth (6)；

Spool (7), the spool (7) can move axially in the valve chamber, be provided in the spool (7) axially extending Oil back chamber is provided with the first opening being connected to the oil back chamber on the end face of the direction end cap (2) of the spool (7), The second opening being connected to the oil back chamber is provided on the peripheral surface of the spool (7), first open communication is in described Connecting hole (18), the spool (7) can move to be connected to make second opening be aligned with the oil return opening (6)；

First check valve (8), first check valve (8) are arranged in the form of positive entrance is towards the entrance of the pressure-releasing chamber In the pressure-releasing chamber；

Second check valve (9), second check valve (9) are arranged in the form of positive entrance is towards first opening described In oil back chamber.

2. oil pump control valve according to claim 1, which is characterized in that first opening is provided with the first filter screen (10)。

3. oil pump control valve according to claim 1, which is characterized in that set between the spool (7) and the end cap (2) It is equipped with resilient bias.

4. oil pump control valve according to claim 3, which is characterized in that the oil inlet (5) goes out close to the valve chamber Mouthful, outlet of the oil return opening (6) far from the valve chamber, the spool (7) can be in first position, the second position and third position Moved between setting, in the first position, the spool (7) be positioned partially at the oil inlet (5) and the oil return opening (6) it Between, the oil inlet (5) and the oil return opening (6) are separated by the spool (7)；In the second position, the spool (7) Between the oil return opening (6) and the end cap (2), the oil inlet (5) is connected to the oil return opening (6)；Described Three positions, the spool (7) partly block side of the oil return opening (6) close to the end cap (2), second opening portion Ground is divided to be aligned the oil return opening (6), first check valve (8) and second check valve (9) are opened.

5. oil pump control valve according to claim 4, which is characterized in that the oil pump control valve includes valve rod (12), institute It states valve rod (12) to be connected to the spool (7) and axially extend to the outlet of the valve chamber, the valve rod (12) includes that setting exists Flow-rate adjustment bar portion in the outlet of the valve chamber, the flow-rate adjustment bar portion include the first bar portion far from the spool (7) (13) and the second bar portion (14) of the close spool (7), the outer diameter of first bar portion (13) are more than second bar portion (14) outer diameter.

6. oil pump control valve according to claim 5, which is characterized in that be provided in the valve chamber positioned at the oil inlet (5) the second filter screen (11) between the oil return opening (6), second filter screen (11) are provided with centre bore, the valve Bar (12) slidably and sealingly passes through the centre bore.

7. oil pump control valve according to claim 6, which is characterized in that the outlet of the valve chamber is provided with valve deck (16), The valve deck (16) is formed with valve opening, and the flow-rate adjustment bar portion is arranged across the valve opening, and the internal diameter of the valve opening is more than institute The outer diameter for stating the first bar portion (13), in the first position and the third place, second bar portion (14) passes through the valve Hole, in the second position, first bar portion (13) passes through the valve opening.

8. oil pump control valve according to claim 7, which is characterized in that the valve rod (12) includes being located at second bar The outer diameter of main body bar portion (15) between portion (14) and the spool (7), the main body bar portion (15) is more than the interior of the valve opening Diameter, the main body bar portion (15) pass through the centre bore.

9. oil pump control valve according to claim 1, which is characterized in that the end cap (2) is provided with to be connected with the pressure-releasing chamber Logical installing port is provided with removable seal (17) in the installing port.

10. a kind of vehicle, the vehicle includes steering pump, which is characterized in that the steering pump is provided with claim 1-9 Any one of described in oil pump control valve.