CN202863543U - Circulation ball hydraulic power assisted steering gear with reversible type stroke limit valve - Google Patents
Circulation ball hydraulic power assisted steering gear with reversible type stroke limit valve Download PDFInfo
- Publication number
- CN202863543U CN202863543U CN 201220515802 CN201220515802U CN202863543U CN 202863543 U CN202863543 U CN 202863543U CN 201220515802 CN201220515802 CN 201220515802 CN 201220515802 U CN201220515802 U CN 201220515802U CN 202863543 U CN202863543 U CN 202863543U
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- 230000002441 reversible effect Effects 0.000 title claims abstract description 46
- 230000000670 limiting effect Effects 0.000 claims description 36
- 238000003801 milling Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model provides a circulation ball hydraulic power assisted steering gear with a reversible type stroke limit valve. The circulation ball hydraulic power assisted steering gear comprises a casing, a valve body, a screw rod, an input shaft, a piston, a plug cap, an unloading valve assembly part, an outer hexagonal plug assembly part and an output shaft. The unloading valve assembly part comprises two unloading valve elements which are parallelly and reversely arranged, wherein one unloading valve element is positioned on the piston and in interference fit with the piston, the other unloading valve element is positioned on the plug cap and in interference fit with the plug cap, and each unloading valve element comprises a long valve needle, a spring, a valve seat, a nut and a short valve needle. The outer hexagonal plug assembly comprises two parallel reversible limit elements which respectively correspond to the unloading valve elements and coaxially arranged. Each reversible limit element comprises an outer hexagonal plug and a hexagonal head plug. The stroke limit valve steering gear is reversible, achieves secondary adjustment of the stroke limit valve of the steering gear, solves the problem that an existing stroke limit valve steering gear is prone to failure due to the fact that an initial pressure relief angle changes large, and simultaneously improves safety coefficients of an automobile in steering.
Description
Technical field
The utility model relates to vehicle steering device, relates in particular to a kind of circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve.
Background technology
Hydraulic power steering gear is installed in automotive front near chaufeur one side.It can provide power-assisted and assist chaufeur to finish the function that turns in Vehicular turn.The power resources of hydraulic power steering gear are driving engines, drive operation of oil pump in the time of engine operation.When acting on the end face (load bearing face) of piston when high pressure oil, piston is produced thrust.Along with the rising thrust of oil pressure increases, thrust increase to make wheel flutter overcome road resistance in, promote wheel flutter and rotate, vehicle enters steering state.
Existing circulation ball hydraulic power assisted steering, its stroke position limiting valve initial angle is irreversible, the stroke position limiting valve of this deflector can improper because of first adjustment (it is large that initial angle becomes) lose efficacy.
Therefore, existing circulation ball hydraulic power assisted steering exists following shortcoming: after 1, being installed in stroke limit valve assembly on the piston and being pressed into internal piston fully, can't readjust initial condition again; 2, can't satisfy the requirement that the part client can secondary adjusts stroke position limiting valve.
The utility model content
The utility model provides a kind of circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve in order to overcome the deficiencies in the prior art.
To achieve these goals, the utility model provides a kind of circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve, comprises housing, valve body, screw rod, input shaft, piston, blanking cover, unloader valve assembly set, outer-hexagonal plug screw assembly set and output shaft.Valve body is installed in a side of housing.Screw rod is arranged in valve body and the housing.Input shaft and screw coaxial setting, an end connecting screw rod of input shaft and be positioned at valve body, the other end of input shaft stretches out outside the valve body.Piston is arranged in the housing and sheathed screw rod movably, and piston and tooth bar are an integral body.Blanking cover is fixed in piston and blocks piston corresponding to the opening of screw rod.The unloader valve assembly set comprises the unloader valve element of two parallel reverse settings, one of them unloader valve element be arranged at piston and with piston be interference fit, another unloader valve element be arranged at blanking cover and with blanking cover be interference fit, each unloader valve element comprises long needle, spring, valve seat, nut and short needle, long needle and the coaxial setting of short needle, spring-compressed is in the middle of long needle and short needle, the sheathed short needle of nut, the sheathed nut of valve seat and long needle, be arranged at the short needle of unloader valve element of piston towards internal piston, be arranged at the long needle of unloader valve element of blanking cover towards internal piston.Outer-hexagonal plug screw assembly set is arranged at housing away from a side of valve body, outer-hexagonal plug screw assembly set comprise two be parallel to each other and respectively with the reversible limit element of the corresponding coaxial setting of unloader valve element, reversible limit element comprises outer-hexagonal plug screw and six-sided head plug screw, outer-hexagonal plug screw and six-sided head plug screw are screw thread fit, and outer-hexagonal plug screw and housing are screw thread fit.Output shaft is located at a side of piston, and output shaft has quadrant gear, and quadrant gear is engaged in piston-rack.
In an embodiment of the present utility model, the circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve also comprises side cover, and side cover is covered in the side of output shaft.
In an embodiment of the present utility model, piston has through hole and groove milling, and through hole is communicated with groove milling, one of them unloader valve element be arranged at through hole and with through hole be interference fit.
In an embodiment of the present utility model, blanking cover has perforation, and one of them unloader valve element is arranged at perforation and is interference fit with perforation.
In an embodiment of the present utility model, be arranged at unloader valve element on the blanking cover, corresponding reversible limit element, screw rod and input shaft is coaxial setting, the unloader valve element and the corresponding reversible limit element that are arranged on the piston are coaxial setting, and axis is parallel to another to the axis of unloader valve element and reversible limit element.
In sum, the circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve that the utility model provides, its stroke position limiting valve be reversible and can secondary, repeatedly adjust.Solved and have the stroke position limiting valve deflector in the past and become the drawback that lost efficacy greatly because of initial pressure release angle, the safety factor the when while has also been improved motor turning has improved the deflector safety performance, makes the deflector performance more perfect.And also can satisfy the client to the reversible requirement of stroke position limiting valve of steering gear requirement energy.It is simple in structure, and is easy to operate.
Description of drawings
The partial cutaway schematic of the circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve that Fig. 1 provides for the utility model.
Fig. 2 is the enlarged diagram of unloader valve assembly set shown in Fig. 1.
Fig. 3 is the enlarged diagram of the assembly set of outer-hexagonal plug screw shown in Fig. 1.
The specific embodiment
The partial cutaway schematic of the circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve that Fig. 1 provides for the utility model.Fig. 2 is the enlarged diagram of unloader valve assembly set shown in Fig. 1.Fig. 3 is the enlarged diagram of the assembly set of outer-hexagonal plug screw shown in Fig. 1.Please in the lump referring to figs. 1 to Fig. 3.A kind of circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve that the utility model provides comprises input shaft 1, valve body 2, housing 3, screw rod 4, piston 5, blanking cover 15, unloader valve assembly set 6, outer-hexagonal plug screw assembly set 7, output shaft 8 and side cover 9.
Valve body 2 is installed in a side of housing 3.Screw rod 4 is arranged in valve body 2 and the housing 3.Input shaft 1 and screw rod 4 coaxial settings, an end connecting screw rod 4 of input shaft 1 and be positioned at valve body 2, the other end of input shaft 1 stretches out outside the valve body 2.Piston 5 is arranged in the housing 3 and sheathed screw rod 4 movably, and piston 5 is an integral body with tooth bar.Blanking cover 15 is fixed in piston 5 and blocks piston 5 corresponding to the opening of screw rod 4.Output shaft 8 is located at a side of piston 5, and output shaft 8 has quadrant gear, and quadrant gear is engaged in piston-rack.Side cover 9 is covered in the side of output shaft 8.
Unloader valve assembly set 6 comprises the unloader valve element of two parallel reverse settings.One of them unloader valve element is arranged at piston 5, and this unloader valve element and piston 5 are interference fit.In present embodiment, piston 5 has through hole and groove milling, and through hole is communicated with groove milling, this unloader valve element be arranged at through hole and with through hole be interference fit.Another unloader valve element is arranged at blanking cover 15, and this unloader valve element and blanking cover 15 are interference fit.In present embodiment, blanking cover 15 has perforation, and this unloader valve element is arranged at perforation and is interference fit with perforation.
Each unloader valve element comprises long needle 10, spring 11, valve seat 12, nut 13 and short needle 14.Long needle 10 and short needle 14 coaxial settings, spring 11 are compressed in the middle of long needle 10 and the short needle 14.Nut 13 sheathed short needles 14.Valve seat 12 sheathed nut 13 and long needles 10.One end of long needle 10 is extended outside valve seat 12.Be arranged at the short needle 14 of unloader valve element of piston 5 towards piston 5 inside, be arranged at the long needle 10 of unloader valve element of blanking cover 15 towards piston 5 inside.
Outer-hexagonal plug screw assembly set 7 is arranged at housing 3 away from a side of valve body 2.Outer-hexagonal plug screw assembly set 7 comprise two be parallel to each other and respectively with the reversible limit element of the corresponding coaxial setting of unloader valve element.Particularly, the reversible limit element, screw rod 4 and the input shaft 1 that are arranged at unloader valve element on the blanking cover 15, its correspondence are coaxial setting, the reversible limit element that is arranged at unloader valve element on the piston 5 and its correspondence is coaxial setting, and its axis is parallel to another to the axis of unloader valve element and reversible limit element.
Reversible limit element comprises outer-hexagonal plug screw 16 and six-sided head plug screw 17.Outer-hexagonal plug screw 16 is screw thread fit with six-sided head plug screw 17.Outer-hexagonal plug screw 16 is screw thread fit with housing 3.In practical application, the bottom of housing 3 (away from a side of valve body 2, i.e. right side shown in Figure 1) is processed with spacing tapped bore, and the six-sided head plug screw 17 of outer-hexagonal plug screw assembly set 7 is threaded with spacing tapped bore.
Unloader valve assembly set 6 and outer-hexagonal plug screw assembly set 7 common formations reversible type stroke position limiting valve of the present utility model.Reversible, secondary adjustment that how the circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve that below will introduce in detail the utility model provides is worked and how to be realized stroke position limiting valve.
When Vehicular turn, high pressure oil enters into the epicoele (perhaps cavity of resorption) of housing 3, and existing is example with cavity of resorption (away from the cavity of input shaft 1, being the right side cavity in Fig. 1).Under the effect of high pressure oil, the long needle 10 that is installed in the unloader valve element on the piston 5 is headed into valve seat 12 the insides, this duration needle 10 is logical oil condition with valve seat 12, and the unloader valve element that is installed on the blanking cover 15 still is in air-tight state under the effect of high pressure oil and spring force.Simultaneously piston 5 moves toward epicoele in the effect of high pressure oil, and when the long needle 10 that moves to the unloader valve element that is installed on the blanking cover 15 when piston 5 had just contacted with the small end face of screw rod 4, epicoele still was in air-tight state at this moment.Then piston 5 continues to move toward epicoele, because screw rod 4 has withstood long needle 10, this duration needle 10 overcomes the application force of spring 11, relatively move toward cavity of resorption (right side) with respect to valve seat 12, so epicoele no longer seals.At this moment the unloader valve element that is installed on the blanking cover 15 also is in logical oil condition; stroke position limiting valve is started working, and housing two oil pocket oil circuits communicate, and the oil pressure of housing two oil pockets is poor also to be decreased; so that the pressure of hydraulic efficiency pressure system maintains a lower state, protected the safety of whole system.
After the stroke position limiting valve work, because upper and lower cavity oil pressure pressure reduction sharply reduces, power steering disappears substantially, this moment, the feel of chaufeur steering wheel rotation was heavy, continue firmly steering wheel rotation, after piston 5 upper and lower cavities all moved to end position, the valve seat 12 that matches with the through hole of piston 5 was pressed in the through hole and groove milling of piston 5 fully, and the valve seat 12 that matches with the perforation of blanking cover 15 is ejected perforation one segment distance.Need to be installed in outer-hexagonal plug screw assembly set 7 on the housing 3 by adjustment and realize secondary adjustment to stroke position limiting valve this moment.
Stroke position limiting valve initial angle (being initial pressure release angle) is that rocker shaft (output shaft 8) is under the Shaft alignment state, steering wheel rotation, and when the valve seat 12 of unloader valve assembly set 6 has just been run into the lower cavity wall of housing 3 or has just been run into screw rod 4, the angle that rocker shaft was put.For the initial angle that makes stroke position limiting valve when work returns to the desired initial angle of client, the outer-hexagonal plug screw assembly set 7 of housing 3 bottoms is screwed out, initial angle during the stroke position limiting valve work that provides according to the client converses the distance that six-sided head plug screw 17 should screw out.The distance that six-sided head plug screw 17 should screw out realizes (because pitch is 1.5mm, every rotation one circle screws out 1.5mm) by the number of turns of controlling its rotation.
Particularly, steering wheel rotation to piston 5 moves to the cavity of resorption end position, and the valve seat 12 that cooperates with blanking cover 15 can be pushed into a segment distance in the blanking cover 15 again by six-sided head plug screw 17.Take out outer-hexagonal plug screw assembly set 7, six-sided head plug screw 17 cycle original positions are reinstalled back outer-hexagonal plug screw assembly set 7 again.The outer-hexagonal plug screw assembly set 7 of upper end among Fig. 3 is taken out, and the stroke position limiting valve initial angle given by the client screws out corresponding distance to six-sided head plug screw 17, screw out this segment distance after, reinstall back again.Just reached the adjustment of stroke position limiting valve secondary by above step.
In sum, the circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve that the utility model provides, its stroke position limiting valve be reversible and can secondary, repeatedly adjust.Solved and have the stroke position limiting valve deflector in the past and become the drawback that lost efficacy greatly because of initial pressure release angle, the safety factor the when while has also been improved motor turning has improved the deflector safety performance, makes the deflector performance more perfect.And also can satisfy the client to the reversible requirement of stroke position limiting valve of steering gear requirement energy.It is simple in structure, and is easy to operate.
Although the utility model is disclosed as above by preferred embodiment; yet be not to limit the utility model; anyly know this skill person; within not breaking away from spirit and scope of the present utility model; can do a little change and retouching, therefore protection domain of the present utility model is as the criterion when looking claims scope required for protection.
Claims (5)
1. the circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve is characterized in that, comprising:
Housing;
Valve body is installed in a side of described housing;
Screw rod is arranged in described valve body and the described housing;
Input shaft, with described screw coaxial setting, an end of input shaft connects described screw rod and is positioned at described valve body, and the other end of described input shaft stretches out outside the described valve body;
Piston is arranged in the described housing and sheathed described screw rod movably, and piston and tooth bar are an integral body;
Blanking cover is fixed in piston and blocks piston corresponding to the opening of screw rod;
The unloader valve assembly set, the unloader valve element that comprises two parallel reverse settings, one of them unloader valve element be arranged at piston and with piston be interference fit, another unloader valve element be arranged at blanking cover and with blanking cover be interference fit, each unloader valve element comprises long needle, spring, valve seat, nut and short needle, long needle and the coaxial setting of short needle, spring-compressed is in the middle of long needle and short needle, the sheathed short needle of nut, the sheathed nut of valve seat and long needle, be arranged at the short needle of unloader valve element of piston towards internal piston, be arranged at the long needle of unloader valve element of blanking cover towards internal piston;
Outer-hexagonal plug screw assembly set is arranged at housing away from a side of valve body, outer-hexagonal plug screw assembly set comprise two be parallel to each other and respectively with the reversible limit element of the corresponding coaxial setting of unloader valve element, reversible limit element comprises outer-hexagonal plug screw and six-sided head plug screw, outer-hexagonal plug screw and six-sided head plug screw are screw thread fit, and outer-hexagonal plug screw and housing are screw thread fit;
Output shaft is located at a side of described piston, and output shaft has quadrant gear, and quadrant gear is engaged in piston-rack.
2. the circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve according to claim 1, it is characterized in that, described circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve also comprises side cover, and described side cover is covered in the side of described output shaft.
3. the circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve according to claim 1, it is characterized in that, described piston has through hole and groove milling, and described through hole is communicated with described groove milling, one of them unloader valve element be arranged at described through hole and with described through hole be interference fit.
4. the circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve according to claim 1 is characterized in that, described blanking cover has perforation, one of them unloader valve element be arranged at described perforation and with described perforation be interference fit.
5. the circulation ball hydraulic power assisted steering with reversible type stroke position limiting valve according to claim 1, it is characterized in that, be arranged at unloader valve element on the blanking cover, corresponding reversible limit element, described screw rod and described input shaft is coaxial setting, the unloader valve element and the corresponding reversible limit element that are arranged on the piston are coaxial setting, and axis is parallel to another to the axis of unloader valve element and reversible limit element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220515802 CN202863543U (en) | 2012-10-10 | 2012-10-10 | Circulation ball hydraulic power assisted steering gear with reversible type stroke limit valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220515802 CN202863543U (en) | 2012-10-10 | 2012-10-10 | Circulation ball hydraulic power assisted steering gear with reversible type stroke limit valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202863543U true CN202863543U (en) | 2013-04-10 |
Family
ID=48030286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220515802 Expired - Lifetime CN202863543U (en) | 2012-10-10 | 2012-10-10 | Circulation ball hydraulic power assisted steering gear with reversible type stroke limit valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202863543U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110893879A (en) * | 2018-09-12 | 2020-03-20 | 博世汽车转向系统（济南）有限公司 | Hydraulic power steering gear |
-
2012
- 2012-10-10 CN CN 201220515802 patent/CN202863543U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110893879A (en) * | 2018-09-12 | 2020-03-20 | 博世汽车转向系统（济南）有限公司 | Hydraulic power steering gear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model |
Correction item: Applicant name Correct: HANGZHOU SHIBAO AUTO STEERING GEAR Co.,Ltd. False: HANGZHOU SHIBAO STEERING GEAR Co.,Ltd. Number: 15 Page: The title page Volume: 29 |
|
| CU03 | Publication of corrected utility model |
Correction item: Applicant name Correct: HANGZHOU SHIBAO AUTO STEERING GEAR Co.,Ltd. False: HANGZHOU SHIBAO STEERING GEAR Co.,Ltd. Number: 15 Volume: 29 |
|
| ERR | Gazette correction |
Free format text: CORRECT: NAME OF APPLICANT; FROM: HANGZHOU SHIBAO STEERING GEAR BOX CO., LTD. TO: HANGZHOU SHIBAO AUTOMOBILE STEERING DEVICE CO., LTD. |
|
| RECT | Rectification | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |