CN104723235A - Height-adjustable universal fixture for feedback rod rigidity measurement and pipe spring rigidity measurement - Google Patents
Height-adjustable universal fixture for feedback rod rigidity measurement and pipe spring rigidity measurement Download PDFInfo
- Publication number
- CN104723235A CN104723235A CN201510102585.2A CN201510102585A CN104723235A CN 104723235 A CN104723235 A CN 104723235A CN 201510102585 A CN201510102585 A CN 201510102585A CN 104723235 A CN104723235 A CN 104723235A
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- China
- Prior art keywords
- rod
- height
- feedback rod
- pipe spring
- fixture
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
Abstract
The invention relates to a height-adjustable universal fixture for feedback rod rigidity measurement and pipe spring rigidity measurement. The height-adjustable universal fixture comprises a base, a height adjustment mechanism, a feedback rod clamping mechanism and a pipe spring fixing mechanism. The height adjustment mechanism comprises a height adjustment micrometer, a height adjustment block, a spring and a spring baffle, wherein the height adjustment micrometer, the spring and the spring baffle are arranged in a rectangular through hole of the base. When the lower end of the feedback rod clamping mechanism is inserted into a circular hole in the upper portion of the base and connected with the height adjustment block, the fixture for the feedback rod rigidity measurement is formed. When the lower end of the pipe spring fixing mechanism is inserted into the circular hole in the upper portion of the base and connected with the height adjustment block, the fixture for the pipe spring rigidity measurement is formed. Compared with the prior art, the height-adjustable universal fixture has the advantages of being adjustable in height, high in universality, simple in structure, stable in clamping, convenient to use and the like.
Description
Technical field
The present invention relates to a kind of measuring fixture, especially relate to a kind of adjustable for height feedback rod and pipe spring rate measures universal fixturing.
Background technology
Electrohydraulic servo system, as a kind of power resources and energy transferring unit, is widely used in industrial control field.The major advantage of this servo-drive system can provide high mass-energy ratio, high-energy transmission and certainly cool.In such systems, electrohydraulic servo valve is main control unit.And the performance of the torque motor be made up of electromagnetic component, flexible member and fluid decides the control accuracy of this type of servo valve.Torque motor elastic element obtains feedback control signal as force sensitive device, and the performance of stiffness characteristics to electrohydraulic servo valve of its elastic element has material impact, and this characteristic determines the performance indications such as control accuracy and sensitivity of electrohydraulic servo valve.
In the design process of electrohydraulic servo valve, need strictly to control the rigidity value of its rod-type flexible member (feedback rod) and tube-like elastic element (pipe spring).But the level of processing of China limits by present stage, be difficult to once reach design object to designing and producing of this class component, generally all just will can reach requirement by the repetitive process of processing, measuring, reprocessing, measuring again.Above-mentioned repeated measurement process just needs to carry out multiple clamping to flexible member, operates comparatively loaded down with trivial details.
But this type of flexible member has that size is little, machining accuracy high.These features require measurement fixture must ensure in clamping or fixation procedure clamping firmly, not yielding.In addition, the specification of flexible member is varied, and the size of the same measured piece of different model also may difference comparatively large, this just requires that measurement fixture should similar, and versatility is good.Again owing to needing constantly to change flexible member in the measuring process of rigidity, this just requires that measurement fixture is ensureing the basis that clamping is firm can also realize rapid-assembling/disassembling.
The stiffness measurement of this type of flexible member is generally by flexible member clamping or after fixing, its deflection that element is produced is measured while the privileged site of flexible member applies active force, this distortion refers to and applies active force flexural deformation that element is produced but not the juxtaposition metamorphose of power site of action generation, finally by calculating rigidity value.As calculated, to put on the position of relatively clamping or fixed position very large to the Influence on test result of stiffness measurement for active force.Therefore, how active force is applied to this privileged site exactly, will dominate the accuracy of this type of elastic element rigidity measurement result.
At present, one special measurement fixture simply and easily also be there is no to this type of flexible member, can meet simultaneously active force is accurately applied to its privileged site, versatility is good, structure is simple, clamping is firm and easy to use requirement.
Summary of the invention
Object of the present invention be exactly provide that a kind of versatility is good to overcome defect that above-mentioned prior art exists, structure is simple, clamp adjustable for height feedback rod firm, easy to use and pipe spring rate measures universal fixturing.
Object of the present invention can be achieved through the following technical solutions:
A kind of adjustable for height feedback rod and pipe spring rate measure universal fixturing, it is characterized in that, comprising:
Pedestal, be provided with rectangular through-hole at side's center side place on the lower side, upper center is provided with the circular port communicated with side rectangular through-hole, and four sides are also provided with the screwed hole communicated with circular port;
Height adjustment mechanism, comprise the height adjusting blocks, spring and the spring stop that highly regulate micrometer and be separately positioned in pedestal rectangular through-hole, described height regulates micrometer to be fixed on one end of pedestal side rectangular through-hole, and be connected with height adjusting blocks one end, the described height adjusting blocks other end is connected with spring stop by spring;
Feedback rod clamping device and pipe Spring retention features, insert the circular port above pedestal when described feedback rod clamping device lower end and be connected with height adjusting blocks, form feedback rod stiffness measurement fixture, insert the circular port above pedestal when described pipe Spring retention features lower end and be connected with height adjusting blocks, then forming pipe spring rate measurement fixture.
Described height adjustment mechanism also comprises installing plate and cushion block, and described height regulates micrometer to be fixed on installing plate, and is fixed on one end of pedestal side rectangular through-hole together by cushion block.
Described feedback rod clamping device, comprise feedback rod fixture rod, the semi-cylindrical movable clip block being with V-type groove, ring block and lock screw, the fixing fixture block and movable clip block that are arranged at end band V-type groove on feedback rod fixture rod entangle by described ring block, the bare terminal end of described feedback rod is placed in the V-type groove of two fixture blocks, and by lock screw, feedback rod is fixed in V-type groove, described feedback rod fixture rod lower end is inserted the circular port above pedestal and is connected with height adjusting blocks, forms feedback rod stiffness measurement fixture.
Described pipe Spring retention features, comprise pipe spring perch rod and fixed screw, pipe spring is fixed on the upper end center of pipe spring perch rod by fixed screw, described pipe spring perch rod lower end is inserted the circular port above pedestal and is connected with height adjusting blocks, forms pipe spring rate measurement fixture.
Described feedback rod fixture surrounding that is excellent or pipe spring perch rod is provided with the side plane of locking and lower end is the inclined-plane consistent with the gradient of height adjusting blocks.
Described ring block side is provided with the first tapped through hole for installing lock screw.
Described pipe spring perch rod central upper portion is provided with backstay and the screwed hole corresponding with pipe spring.
Described spring stop is provided with the first blind hole of the second tapped through hole and the mounting spring of fixing with pedestal.
Described height adjusting blocks, the shape of its profile is in the adjustment directions right-angled trapezium, is provided with second blind hole corresponding with mounting spring and spring stop same with spring stop opposite end.
Compared with prior art, the present invention has the following advantages:
For the stiffness measurement of feedback rod or pipe spring, only need change cylindrical fixture rod, use feedback rod clamping device when measuring feedback rod, during measuring tube spring, use pipe Spring retention features.To the flexible member of same kind different size, if size (as flexible member length or feedback rod bare terminal end diameter) difference is larger, special respective clamp or fixed mechanism can be selected, then by height adjustment mechanism, active force is accurately put on privileged site; If size is more or less the same, clamping or fixed mechanism can not be changed, and only by height adjustment mechanism, active force accurately need be put on privileged site, and therefore fixture has that structure is simple, versatility good and feature easy to use.In addition, for feedback rod, owing to devising the V-type groove of band constant depth, only element clamps end need be put into V-type groove during measurement, use screw locking immediately; For pipe spring, then by screw firmly stationary fixture rod upper end center, realize quick position with backstay, there is quick-clamping, firm feature.
Therefore, stiffness measurement fixture versatility of the present invention is good, structure is simple, easy to use, clamping is firm also accurately control action power can load position, greatly can improve the accuracy of stiffness measurement result, improve the clamping efficiency of flexible member and reduce labour intensity.
Accompanying drawing explanation
Fig. 1 is the structural representation of feedback rod stiffness measurement fixture of the present invention;
Fig. 2 is the structural representation of height adjustment mechanism of the present invention;
Fig. 3 is the structural representation of height adjusting blocks of the present invention;
Fig. 4-1 and Fig. 4-2 is the structural representation of spring block of the present invention;
Fig. 5 is the structural representation of pipe spring rate measurement fixture of the present invention;
Fig. 6 is the structural representation of feedback rod cylindrical fixture rod of the present invention;
Fig. 7 is the structural representation of ring block of the present invention;
Fig. 8 is the structural representation of clamping device structure of the present invention;
Fig. 9 is the structural representation of pipe spring cylindrical fixture rod of the present invention;
Figure 10 is the structural representation of pipe Spring retention features of the present invention;
Wherein 1 is pedestal, 2 is feedback rod cylindrical fixture rod, 3 is semi-cylindrical movable clip block, 4 is feedback rod, 5 is ring block, 6 is feedback rod lock screw, 7 is fixture rod lock screw, 8 is micrometer installing plate, 9 for highly to regulate micrometer, 10 is cushion block, 11 is spring stop, 12 is height adjusting blocks, 13 is spring, 14 is pipe spring cylindrical fixture rod, 15 is pipe spring, 16 is pipe spring fixed screw, 17 is the fixing tapped through hole of spring stop, 18 blind holes that are mounting spring on spring stop, 19 blind holes that are mounting spring on height adjusting blocks, 20 is fixing fixture block, 21 is the side plane of locking, 22 for installing the tapped through hole of lock screw, 23 is backstay, 24 screwed holes that are locking tube spring.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
Fig. 1 is the structural representation of feedback rod stiffness measurement fixture of the present invention, comprise pedestal 1, feedback rod cylindrical fixture rod 2, semi-cylindrical movable clip block 3, ring block 5, feedback rod lock screw 6, fixture rod lock screw 7, micrometer installing plate 8, highly regulate micrometer 9, cushion block 10, spring stop 11 and height adjusting blocks 12 and spring 13, as shown in Figure 2.Micrometer 9 is highly regulated to be arranged on the center of micrometer installing plate 8, one end of pedestal 1 rectangular through-hole is fixed on together with cushion block 10, height adjusting blocks 12 is put into rectangular through-hole from the rectangular through-hole other end and two springs 13 is inserted the blind hole 19 of height adjusting blocks 12, as shown in Figure 3, spring stop 11 is screwed the other end in pedestal 1 rectangular through-hole, the other end of two springs 13 then inserts in two blind holes 18 on spring stop 11, as shown in Fig. 4-1 and Fig. 4-2.Highly regulate micrometer 9, micrometer installing plate 8, cushion block 10, height adjusting blocks 12, spring 13 and spring stop 11 to form height adjustment mechanism, realize regulating the height of flexible member.The fixing fixture block and movable clip block 3 that are arranged at fixture rod 2 upper ends entangle by ring block 5, the bare terminal end of feedback rod 4 is placed in the constant depth V-type groove of two fixture blocks, by lock screw 6, feedback rod 4 is firmly fixed in V-type groove, fixture rod 2 beveled end inserted the circular port of pedestal 1 from top, its beveled end is connected with the beveled end of height adjusting blocks 12.Cylindrical fixture rod 2, semi-cylindrical movable clip block 3, ring block 5, feedback rod lock screw 6 and fixture rod lock screw 7 forms the fixed mechanism of feedback rod clamping and fixture rod, realizes the quick and firm holding function to flexible member.
In addition, to different types of flexible member feedback rod or pipe spring or with kind but the flexible member of the larger different model of its size difference is tested time, only need change the fixture rod that type flexible member is special for this reason.As fixture rod 2 is changed to fixture rod 14, just can test the rigidity of pipe spring, as shown in Figure 5.
Composition graphs 1 and Fig. 5 more below, is described respectively to the using method of feedback rod of the present invention and pipe spring rate measurement fixture.For the rigidity test of feedback rod, as shown in Figure 1, select suitable fixture rod 2 according to respective feedback bar and it is inserted in pedestal 1 by correct orientation.Semi-cylindrical movable clip block 3 is positioned over the upper end of fixture rod 2 by correct orientation, the fixing fixture block 20 of itself and fixture rod upper end forms cylindrical shape, then entangles this two semi-cylindrical fixture blocks, as shown in Fig. 6,7,8 with ring block 5.Feedback rod 4 inserts in the V-type groove of these two fixture blocks, and lock screw 6 screws in the screwed hole 22 of ring block side, reaches the object of locking feedback rod.Regulate and highly regulate micrometer 9, feedback rod can be realized in the change in location of short transverse and accurately locate, regulate on the rear side plane 21 lock screw 7 screw-in being withstood on fixture rod 2 and fixture rod 2 is fixed, just can carry out the rigidity test of feedback rod.For the rigidity test of pipe spring, as shown in Figure 5, suitable fixture rod 14 is selected equally according to respective tube spring, being pressed correct orientation inserts in pedestal 1, then pipe spring 15 is placed in the upper end of fixture rod 14, backstay 23 realizes the fast positioning function of pipe spring, screw 16 is screwed in screwed hole 24 and is fixed by pipe spring, as shown in Fig. 9,10.Regulate and highly regulate micrometer 9, pipe spring can be realized in the change in location of short transverse and accurately locate, regulate on the rear side plane 21 lock screw 7 screw-in being withstood on fixture rod 14 and fixture rod 14 is fixed, just can carry out the rigidity test of pipe spring.
Claims (9)
1. adjustable for height feedback rod and pipe spring rate measure a universal fixturing, it is characterized in that, comprising:
Pedestal (1), be provided with rectangular through-hole at side's center side place on the lower side, upper center is provided with the circular port communicated with side rectangular through-hole, and four sides are also provided with the screwed hole communicated with circular port;
Height adjustment mechanism, comprise the height adjusting blocks (12), spring (13) and the spring stop (11) that highly regulate micrometer (9) and be separately positioned in pedestal (1) rectangular through-hole, described height regulates micrometer (9) to be fixed on one end of pedestal (1) side rectangular through-hole, and be connected with height adjusting blocks (12) one end, described height adjusting blocks (12) other end is connected with spring stop (11) by spring (13);
Feedback rod clamping device and pipe Spring retention features, insert the circular port of pedestal (1) top when described feedback rod clamping device lower end and be connected with height adjusting blocks (12), form feedback rod stiffness measurement fixture, insert the circular port of pedestal (1) top when described pipe Spring retention features lower end and be connected with height adjusting blocks (12), then forming pipe spring rate measurement fixture.
2. the adjustable for height feedback rod of one according to claim 1 and pipe spring rate measure universal fixturing, it is characterized in that, described height adjustment mechanism also comprises installing plate (8) and cushion block (10), described height regulates micrometer (9) to be fixed on installing plate (8), and is fixed on one end of pedestal (1) side rectangular through-hole together by cushion block (10).
3. the adjustable for height feedback rod of one according to claim 1 and pipe spring rate measure universal fixturing, it is characterized in that, described feedback rod clamping device, comprise feedback rod fixture rod (2), with the semi-cylindrical movable clip block (3) of V-type groove, ring block (5) and lock screw (6), the fixing fixture block (20) and movable clip block (3) that are arranged at the upper end band V-type groove of feedback rod fixture rod (2) entangle by described ring block (5), the bare terminal end of described feedback rod (4) is placed in the V-type groove of two fixture blocks, and by lock screw (6), feedback rod (4) is fixed in V-type groove, described feedback rod fixture rod (2) lower end is inserted the circular port of pedestal (1) top and is connected with height adjusting blocks (12), form feedback rod stiffness measurement fixture.
4. the adjustable for height feedback rod of one according to claim 1 and pipe spring rate measure universal fixturing, it is characterized in that, described pipe Spring retention features, comprise pipe spring perch rod (14) and fixed screw (16), pipe spring (15) is fixed on the upper end center of pipe spring perch rod (14) by fixed screw (16), described pipe spring perch rod (14) lower end is inserted the circular port of pedestal (1) top and is connected with height adjusting blocks (12), forms pipe spring rate measurement fixture.
5. the adjustable for height feedback rod of the one according to claim 3 or 4 and pipe spring rate measure universal fixturing, it is characterized in that, described feedback rod fixture rod (2) or the surrounding of pipe spring perch rod (14) are provided with the side plane (21) of locking and lower end is the inclined-plane consistent with the gradient of height adjusting blocks (12).
6. the adjustable for height feedback rod of one according to claim 3 and pipe spring rate measure universal fixturing, it is characterized in that, described ring block (5) side is provided with the first tapped through hole (22) for installing lock screw (6).
7. the adjustable for height feedback rod of one according to claim 4 and pipe spring rate measure universal fixturing, it is characterized in that, described pipe spring perch rod (14) central upper portion is provided with backstay (23) and the screwed hole corresponding with pipe spring (24).
8. the adjustable for height feedback rod of one according to claim 1 and pipe spring rate measure universal fixturing, it is characterized in that, described spring stop (11) is provided with second tapped through hole (17) fixing with pedestal (1) and first blind hole (18) of mounting spring (13).
9. the adjustable for height feedback rod of the one according to claim 1 or 8 and pipe spring rate measure universal fixturing, it is characterized in that, described height adjusting blocks (12), the shape of its profile is in the adjustment directions right-angled trapezium, is provided with second blind hole (19) corresponding with mounting spring (13) and spring stop (11) same with spring stop (11) opposite end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510102585.2A CN104723235B (en) | 2015-03-09 | 2015-03-09 | A kind of adjustable for height feedback rod measures universal fixturing with pipe spring rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510102585.2A CN104723235B (en) | 2015-03-09 | 2015-03-09 | A kind of adjustable for height feedback rod measures universal fixturing with pipe spring rate |
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| Publication Number | Publication Date |
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| CN104723235A true CN104723235A (en) | 2015-06-24 |
| CN104723235B CN104723235B (en) | 2016-07-06 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163868A (en) * | 2018-10-17 | 2019-01-08 | 北京理工大学 | A kind of rigidity testing system and method for cantilever beam class elastic element |
| TWI679605B (en) * | 2017-06-23 | 2019-12-11 | 美商應用材料股份有限公司 | Systems and methods of gap calibration via direct component contact in electronic device manufacturing systems |
| CN112570846A (en) * | 2020-11-17 | 2021-03-30 | 中国航发西安动力控制科技有限公司 | Positioning welding fixture and welding method for assembling thin-wall feedback rod of hydraulic servo valve |
| CN112676665A (en) * | 2020-11-17 | 2021-04-20 | 中国航发西安动力控制科技有限公司 | Welding tool and method for feedback rod of electro-hydraulic servo valve |
| CN112924121A (en) * | 2021-02-01 | 2021-06-08 | 上海交通大学 | Device and method for measuring rigidity of inner cavity of elastic structure |
| CN113977489A (en) * | 2021-11-15 | 2022-01-28 | 株洲时代瑞唯减振装备有限公司 | Be used for single rigidity test frock of rail vehicle V type spring |
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| CN112570846A (en) * | 2020-11-17 | 2021-03-30 | 中国航发西安动力控制科技有限公司 | Positioning welding fixture and welding method for assembling thin-wall feedback rod of hydraulic servo valve |
| CN112676665A (en) * | 2020-11-17 | 2021-04-20 | 中国航发西安动力控制科技有限公司 | Welding tool and method for feedback rod of electro-hydraulic servo valve |
| CN112570846B (en) * | 2020-11-17 | 2022-03-08 | 中国航发西安动力控制科技有限公司 | Positioning welding fixture and welding method for assembling thin-wall feedback rod of hydraulic servo valve |
| CN112924121A (en) * | 2021-02-01 | 2021-06-08 | 上海交通大学 | Device and method for measuring rigidity of inner cavity of elastic structure |
| CN112924121B (en) * | 2021-02-01 | 2022-04-26 | 上海交通大学 | Device and method for measuring rigidity of inner cavity of elastic structure |
| CN113977489A (en) * | 2021-11-15 | 2022-01-28 | 株洲时代瑞唯减振装备有限公司 | Be used for single rigidity test frock of rail vehicle V type spring |
| CN113977489B (en) * | 2021-11-15 | 2023-07-25 | 株洲时代瑞唯减振装备有限公司 | Single-piece stiffness test tool for V-shaped spring of railway vehicle |
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