CN201176986Y - Servo- oil cylinder overtravel protection mechanical spacing structure - Google Patents
Servo- oil cylinder overtravel protection mechanical spacing structure Download PDFInfo
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- CN201176986Y CN201176986Y CNU2008200324462U CN200820032446U CN201176986Y CN 201176986 Y CN201176986 Y CN 201176986Y CN U2008200324462 U CNU2008200324462 U CN U2008200324462U CN 200820032446 U CN200820032446 U CN 200820032446U CN 201176986 Y CN201176986 Y CN 201176986Y
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- cylinder body
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- servo
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Abstract
The utility model relates to a mechanical limit structure for the over stroke protection of a servo cylinder. An upper limit surface fixed on an upper section of a piston rod extended out of a cylinder body is arranged opposite to the upper end surface on the outside of the cylinder body and forms a piston descending limit structure together with the upper end surface on the outside of the cylinder body; A lower limit surface fixed on a lower section of the piston rod extended out of the cylinder body is arranged opposite to the lower end surface on the outside of the cylinder body and forms a piston rising limit structure together with the lower end surface on the outside of the cylinder body; the distance from the upper limit surface to the upper end surface on the outside of the cylinder body is shorter than the distance from the lower end surface of the piston to the lower end surface inside the cylinder body, and the distance from the lower upper limit surface to the lower end surface on the outside of the cylinder body is shorter than the distance from the upper end surface of the piston to the upper end surface inside the cylinder body. The mechanical limit structure solves the problem that: in case of a malfunctioning electric system or maloperation, the cylinder piston is damaged by the abnormal over stroke, and thus the performance index of the servo cylinder is impacted.
Description
Technical field
The utility model relates to the electric liquid vibrating table (or claiming hydraulic vibration generator) in the environmental mechanics testing installation, particularly is applied to a kind of mechanical position limitation structure of protecting oil cylinder piston not destroyed by improper overtravel of electric liquid vibrating table servo-cylinder.
Background technique
Electricity liquid vibrating table is the testing installation that carries out low frequency, high thrust vibration test, is mainly used in each quasi-instrument, the instrument of industries such as rolling stock, automobile, boats and ships, the anti-test and the reliability trial of shaking of component.The hydraulic control system that electricity liquid vibrating table is made up of electric control system, oil sources part, vibration stage body etc., its control principle mainly is that hydraulic pressure is power, the control signal required by vibration controller output drives servo-cylinder via servoamplifier control servovalve, realizes the motion of vibration stage body.And servo-cylinder is a hydraulic actuator, constitutes the vibration exciter of electric liquid vibrating table with table top.Servo-cylinder mainly is made up of cylinder body, piston and piston rod, and is installed on the vibrating table base by oil cylinder seat; The upper/lower terminal of piston rod is respectively equipped with upper and lower locknut, and the upper end of piston rod links to each other with the table surface base.
During work, because the characteristics of hydraulic vibration gen are exactly the vibration test of carrying out big load, all between 500kg to 10000kg or higher, frequency is between 0.1Hz to 500Hz in general load, and the inertia ratio of system is bigger.Because in vibration processes, the movement velocity of piston is than very fast, owing to the reason of some Unpredictabilities as: have a power failure, electric control system fault or personnel's misoperation etc., very easily form the improper overtravel of servo-cylinder, cause piston upper and lower end face and cylinder body direct collision, piston is destroyed, cause the damage of the irrecoverable property of servo-cylinder, have a strong impact on the performance index of system.
For above-mentioned condition; the solution that people use always generally is to adopt uninterruptable power source or increase some electric position limitation protection circuits; can when having a power failure, realize the overtravel protection like this, but improper overtravel out of control to electrical system or that personnel's misoperation causes can not play a protective role still to the servo-cylinder piston.Therefore; the utility model is from improving the angle of prior art; a kind of mechanical position limitation structure of servo-cylinder overtravel protection is provided; when guaranteeing in electrical system out of control or personnel's misoperation; can protect oil cylinder piston not to be subjected to the destruction of improper overtravel; thereby guarantee that the servo-cylinder performance index are not subjected to the influence of improper overtravel, increase the reliability of system.
Summary of the invention
The utility model purpose provides a kind of mechanical position limitation structure of servo-cylinder overtravel protection; its objective is that solution is in electrical system during out of control or personnel's misoperation; oil cylinder piston is subject to the destruction of improper overtravel, thereby influences the technical problem of servo-cylinder performance index.
For achieving the above object, the technical solution adopted in the utility model is: a kind of mechanical position limitation structure of servo-cylinder overtravel protection, the epimere that piston rod stretches out in cylinder body is installed with a upper limit plane, and this upper limit plane is oppositely arranged to cooperate with cylinder body outer upper end face forms the descent of piston limit structure; The hypomere that piston rod stretches out in cylinder body is installed with confined planes, and this lower limit plane and lower end surface, the cylinder body outside are oppositely arranged forms the piston stroking upward limit structure; The distance of described upper limit identity distance cylinder body outer upper end face is less than the distance of piston lower surface apart from the cylinder interior lower end surface, and the distance of lower end surface, the described lower limit identity distance cylinder body outside is less than the distance of piston upper-end surface apart from the cylinder interior upper-end surface.
The further change interpretation of related content in the technique scheme is as follows:
1, in the such scheme, be provided with down locknut on the piston rod hypomere, the top of this time locknut is provided with a lower position nut,, described lower position nut with respect to the end face of lower end surface outside the cylinder body as the lower limit plane.
2, in the such scheme, a upper limit nut is set below the table top base, this upper limit nut is positioned at the below of table top base, described upper limit nut with respect to the end face of cylinder body outer upper end face as upper limit plane.
3, in the such scheme, the bottom surface of the table top base that the piston rod epimere links to each other is as upper limit plane, and this moment, the upper limit nut was located at the top of table top base.
4, in the such scheme, described " upper and lower " all is meant the upper and lower position on the vertical direction when the work of electric liquid vibrating table.
Because the technique scheme utilization, the utility model compared with prior art has following advantage:
Because the epimere that the utility model stretches out cylinder body at piston rod is established a upper limit plane and is established confined planes at the hypomere that piston rod stretches out cylinder body; and the distance of described upper limit identity distance cylinder body outer upper end face is less than the distance of piston lower surface apart from the cylinder interior lower end surface; the distance of lower end surface, the described lower limit identity distance cylinder body outside is less than the distance of piston upper-end surface apart from the cylinder interior upper-end surface; like this when the situation of servo-cylinder in improper overtravel; owing to be subjected to; the protection of lower limit plane; make the cylinder body outside on; lower end surface and last; the contact of lower limit plane; therefore can not cause on piston and the cylinder interior; direct collision between the following both ends of the surface; the destruction that the protection piston is not subjected to improper overtravel; thereby guaranteed that the servo-cylinder performance index are not subjected to the influence of improper overtravel, have increased the reliability of system.
Description of drawings
Structural representation when accompanying drawing 1 is the utility model embodiment one piston stroking upward;
Structural representation when accompanying drawing 2 is the utility model embodiment one descent of piston;
Structural representation when accompanying drawing 3 is the utility model embodiment two piston stroking upwards;
Structural representation when accompanying drawing 4 is the utility model embodiment two descent of pistons.
In the above accompanying drawing: 1, vibrating table base; 2, oil cylinder seat; 4, piston; 5, piston rod; 6, following locknut; 7, go up locknut; 8, table top base; 9, upper limit nut; 10, lower position nut.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment one:
As shown in Figure 1 and Figure 2, a kind of mechanical position limitation structure of servo-cylinder overtravel protection, wherein servo-cylinder mainly is made up of cylinder body, piston 4 and piston rod 5, and by oil cylinder seat 2 cylinder body is installed on the vibrating table base 1; Piston rod 5 stretches out and is respectively equipped with locknut 7 and following locknut 6 on upper and lower two sections of cylinder body, and the epimere that stretches out cylinder body of piston rod 5 links to each other with table surface base 8.
The mechanical position limitation structure of this servo-cylinder overtravel protection is: the epimere that piston rod 5 stretches out in cylinder body is provided with locknut 7, the top that should go up locknut 7 is provided with a upper limit nut 9, the bottom surface of the feasible table top base 8 that links to each other with piston rod 5 upper ends descends, then the bottom surface of table top base 8 is as upper limit plane, this upper limit plane is oppositely arranged to cooperate with cylinder body outer upper end face forms piston 4 descending limit structures, and the distance of described upper limit identity distance cylinder body outer upper end face is less than the distance of piston 4 lower end surfaces apart from the cylinder interior lower end surface; Stretch out at piston rod 5 and be provided with locknut 6 down on the hypomere of cylinder body, the top of this time locknut 6 is provided with a lower position nut 10, described lower position nut 10 with respect to the end face of lower end surface, the cylinder body outside as the lower limit plane, this lower limit plane and lower end surface, the cylinder body outside are oppositely arranged forms piston 4 up limit structures, and the distance of lower end surface, the described lower limit identity distance cylinder body outside is less than the distance of piston 4 upper-end surfaces apart from the cylinder interior upper-end surface.
As shown in Figure 1; when piston stroking upward; when if the out of control or personnel's misoperation of electrical system occurring; can be oppositely arranged the up limit structure of forming piston 4 by lower limit plane and lower end surface, the cylinder body outside; does not collide with the cylinder interior upper-end surface upper-end surface of protection piston 4; thereby the destruction that protection piston 4 is not subjected to improper overtravel guarantees that the servo-cylinder performance index are not subjected to the influence of improper overtravel, increase the reliability of system.
As shown in Figure 2; when descent of piston; when if the out of control or personnel's misoperation of electrical system occurring; can be oppositely arranged the descending limit structure of forming piston 4 by upper limit plane and cylinder body outer upper end face; does not collide with the cylinder interior lower end surface lower end surface of protection piston 4; thereby the destruction that protection piston 4 is not subjected to improper overtravel guarantees that the servo-cylinder performance index are not subjected to the influence of improper overtravel, increase the reliability of system.
Embodiment two:
As shown in Figure 3, Figure 4; a kind of mechanical position limitation structure of servo-cylinder overtravel protection; be with embodiment one difference: described upper limit nut 9 is arranged on the below of the table top base 8 that links to each other with piston rod 5 epimeres; the lower end surface of upper limit nut 9 forms a upper limit plane with respect to cylinder body outer upper end face; this upper limit plane and cylinder body outer upper end face are oppositely arranged the descending limit structure of forming piston 4; other structure is identical with embodiment one, no longer repeats here.
The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.
Claims (4)
1, a kind of mechanical position limitation structure of servo-cylinder overtravel protection, it is characterized in that: the epimere that piston rod (5) stretches out in cylinder body is installed with a upper limit plane, and this upper limit plane is oppositely arranged to cooperate with cylinder body outer upper end face forms the descending limit structure of piston (4); The hypomere that piston rod (5) stretches out in cylinder body is installed with confined planes, and this lower limit plane and lower end surface, the cylinder body outside are oppositely arranged forms the piston stroking upward limit structure; The distance of described upper limit identity distance cylinder body outer upper end face is less than the distance of piston (4) lower end surface apart from the cylinder interior lower end surface, and the distance of lower end surface, the described lower limit identity distance cylinder body outside is less than the distance of piston (4) upper-end surface apart from the cylinder interior upper-end surface.
2, the mechanical position limitation structure of servo-cylinder overtravel protection according to claim 1; it is characterized in that: on piston rod (5) hypomere, be provided with locknut (6) down; the top of this time locknut (6) is provided with a lower position nut (10), described lower position nut (10) with respect to the end face of lower end surface, the cylinder body outside as the lower limit plane.
3, the mechanical position limitation structure of servo-cylinder overtravel protection according to claim 1; it is characterized in that: a upper limit nut (9) is set in table top base (8) below, described upper limit nut (9) with respect to the end face of cylinder body outer upper end face as upper limit plane.
4, the mechanical position limitation structure of servo-cylinder overtravel protection according to claim 1, it is characterized in that: the bottom surface of the table top base (8) that piston rod (5) epimere links to each other is as upper limit plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200324462U CN201176986Y (en) | 2008-03-03 | 2008-03-03 | Servo- oil cylinder overtravel protection mechanical spacing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200324462U CN201176986Y (en) | 2008-03-03 | 2008-03-03 | Servo- oil cylinder overtravel protection mechanical spacing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201176986Y true CN201176986Y (en) | 2009-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200324462U Expired - Lifetime CN201176986Y (en) | 2008-03-03 | 2008-03-03 | Servo- oil cylinder overtravel protection mechanical spacing structure |
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| CN (1) | CN201176986Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103171128A (en) * | 2013-03-05 | 2013-06-26 | 张家港市三佳中空吹塑科技有限公司 | Servo cylinder line position protection device |
| CN108344551A (en) * | 2018-04-20 | 2018-07-31 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of shake table transmission device |
| CN108362457A (en) * | 2018-04-20 | 2018-08-03 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of shake table mounting base |
-
2008
- 2008-03-03 CN CNU2008200324462U patent/CN201176986Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103171128A (en) * | 2013-03-05 | 2013-06-26 | 张家港市三佳中空吹塑科技有限公司 | Servo cylinder line position protection device |
| CN108344551A (en) * | 2018-04-20 | 2018-07-31 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of shake table transmission device |
| CN108362457A (en) * | 2018-04-20 | 2018-08-03 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of shake table mounting base |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SUZHOU SUSHISHIYAN INSTRUMENT CO., LTD. Free format text: FORMER OWNER: SUZHOU TESTING EQUIPMENT GENERAL FACTORY Effective date: 20090522 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090522 Address after: Jiangsu Province, Suzhou Industrial Park, the new science and Technology City, only Ting Town, No. 18 Ji Feng Road, zip code: 215122 Patentee after: Suzhou Sushi Testing Instrument Co., Ltd. Address before: No. 55 deer Road, hi tech Zone, Jiangsu, Suzhou Province: 215129 Patentee before: Suzhou Testing Instrument Factory |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215122 Suzhou Industrial Park, the new science and Technology City, the town of Ting Ting Feng Road, No. 18, No. Patentee after: Suzhou Sushi Testing Instrument Co.,Ltd. Address before: 215122 Suzhou Industrial Park, the new science and Technology City, the town of Ting Ting Feng Road, No. 18, No. Patentee before: Suzhou Sushi Testing Instrument Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 215122 Suzhou Industrial Park, the new science and Technology City, the town of Ting Ting Feng Road, No. 18, No. Patentee after: Suzhou Su test group Limited by Share Ltd Address before: 215122 Suzhou Industrial Park, the new science and Technology City, the town of Ting Ting Feng Road, No. 18, No. Patentee before: Suzhou Sushi Testing Instrument Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090107 |
|
| CX01 | Expiry of patent term |