CN104316402A - Simple apparatus for testing tensile strength of double torsional springs - Google Patents
Simple apparatus for testing tensile strength of double torsional springs Download PDFInfo
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- CN104316402A CN104316402A CN201410560752.3A CN201410560752A CN104316402A CN 104316402 A CN104316402 A CN 104316402A CN 201410560752 A CN201410560752 A CN 201410560752A CN 104316402 A CN104316402 A CN 104316402A
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Abstract
The invention relates to a simple apparatus for testing tensile strength of double torsional springs. The technical key points are as follows: the simple apparatus comprises a first guide rod, a first movable block, a fixed block, a locking screw, a second movable block, a pressing board, a screw rod and a limiting screw, wherein the first movable block and the second movable block are positioned on two sides of the fixed bock respectively, and are connected with the fixed block through the screw rod and the first guide rod, the first guide rod and the fixed block are in transition fit connection in a manner of limiting axial displacement, the first guide rod is in clearance fit connection with the first movable block and the second movable block, the screw rod and the fixed block in clearance fit connection in a manner of limiting axial displacement and rotating, one end of the screw rod is provided with left-hand threads, the other end of the screw rod is provided with right-hand threads, the screw rod is fixedly connected with the first movable block and the second movable block through the matched left-hand threads and right-hand threads, and clamping openings matched with the pressing board for clamping torsional arms are respectively formed above the first movable block, the second movable block and the fixed block. The simple apparatus converts tensile strength measurement into tensile elongation measurement, and is convenient to operate.
Description
Technical field
The present invention is applicable to the tensile test of torsion spring.
Background technology
Torsion spring is widely used in the stabilising arrangement on shell product and aviation aircraft, connect fin and wing seat, eligibility torque load, if material generation plastic yield can make torsion spring lose efficacy, the economic loss caused and security incident inestimable, so torsion spring test for tensile strength is important self-evident.Torsion spring as shown in Figure 1, if buy special drawing machine tool for test for tensile strength, not only cost is too high, and mobile inconvenient, and test site is very restricted.
Summary of the invention
The object of the invention is to overcome the high shortcoming of existing test for tensile strength cost, provide a kind of quick, structure simple, be easy to operate, the torsion spring tensile strength brief test device of Applied economy.
The technical solution adopted in the present invention is a kind of torsion spring tensile strength brief test device, its main points are that it comprises the Ith guide rod, Ith movable block, fixed block, lock-screw, IIth movable block, pressing plate, screw rod, stop screw, Ith movable block, IIth movable block lays respectively at the both sides of fixed block, Ith movable block, IIth movable block and fixed block pass through screw rod, Ith guide rod connects, Ith is that the transition fit limiting axial displacement is connected between guide rod with fixed block, Ith guide rod and the Ith movable block, for clearance fit connects between IIth movable block, between screw rod with fixed block for restriction axial displacement rotating clearance fit be connected, screw rod one end is left-hand thread (LHT), the other end is right-hand thread, it and the Ith movable block, IIth movable block is respectively match left-handed, right-hand thread is fixedly connected with, Ith movable block, IIth movable block, the top of fixed block has the bayonet socket matched for clamping torque arm with pressing plate respectively.
The principle that the pulling force of the present invention suffered by torsion spring is directly proportional to its tensile elongation, torsion spring tensile strength will be measured, be converted into the tensile elongation measuring torsion spring, the tensile elongation of torsion spring is precomputed according to torsion spring tensile strength, thus determine to need to produce much displacements between soon movable and fixed block, as long as torsion spring can reach the tensile elongation of setting, then assert that the tensile strength of torsion spring meets designing requirement.The present invention creatively utilizes left-hand thread (LHT) and right-hand thread worm drive to produce reverse relative displacement, be left-hand thread (LHT) by screw rod one end, the other end is right-hand thread, it is respectively left-handed, the right-hand thread that match is fixedly connected with the Ith movable block, the IIth movable block, when rotating screw bolt, because the axial displacement between screw rod and fixed block is limited, can only freely rotate, and the Ith movable block, the IIth movable block under the drive of screw flight respectively to outer movement, by torsion spring to both sides axial tension.Increasing by the Ith guide rod is in order to whole mechanism is steadily stressed.
Take screw rod as symcenter, have the IIth guide rod with the Ith guide rod same design at the symmetrical place of the Ith guide rod.
Two are adopted to be that fixed block and the Ith movable block, the IIth activity are together in series by the guide rod of axis of symmetry soon with screw rod, steady and smooth more when making the Ith movable fast, the IIth movable block and fixed block produce relative displacement.
Handle is connected with at the tail end of screw rod.Make operation light, laborsaving, convenient, the round steel of handle certain length, also can use and the labour-saving catanators such as the identical runner of water valve.
Described screw rod with between fixed block for limit axial displacement rotating clearance fit be connected, refer to that screw rod and fixed block adopt the clearance fit of axle and unthreaded hole, the center section connected circumferentially is designed with an annular groove, be fixed with stop screw in the below of the corresponding fixed block of annular groove, the afterbody of stop screw matches with annular groove.
This structure is simple, and when rotating screw bolt, the limited screw of screw rod is positioned in fixed block unthreaded hole, can only freely rotate, can not axial displacement be produced, and the Ith movable block, the IIth movable block under the drive of screw flight respectively to outer movement, by torsion spring to both sides axial tension.
Described the Ith is that the transition fit limiting axial displacement is connected between guide rod with fixed block, refer to that the Ith guide rod and fixed block adopt the transition fit of axle and unthreaded hole, the center section connected circumferentially is designed with an annular groove, stop screw is fixed with, the axial displacement of stop screw restriction the Ith between guide rod and fixed block in the below of the corresponding fixed block of annular groove.Identical with the Position Design of screw rod, be beneficial to processing and assembling.
Panel above Ith movable block, the IIth movable block, fixed block there is respectively the bayonet socket placing torsion spring, pushed down by pressing plate and compress with lock-screw, make torsion spring be convenient to tensile strength and detect.
Ith guide rod or the IIth guide rod are designed with rule.The displacement energy that such movable block produces reads from rule.
0 of rule for integrated connection fixing after, the junction of the Ith guide rod or the IIth guide rod and movable block.Reading is easy.
Assembling sequence of the present invention: first assemble screw rod and fixed block, with stop screw spacing-screw rod left-hand thread (LHT) one end assembles with the Ith movable block of same left-hand thread (LHT)--the IIth movable block of screw rod right-hand thread one end and same right-hand thread assemble-fills the Ith guide rod and the IIth guide rod, and with stop screw spacing-indexing chi-screw rod and handle fix.
Using method of the present invention, the torsion spring linking arm that will detect and the torque arm be attached thereto are enclosed within the bayonet socket of panel above fixed block, two other torque arm is stuck on the bayonet socket of the Ith movable block and the IIth movable block, torque arm is fixed on pressing plate with lock-screw and between the Ith movable block and the IIth movable block, rotating screw bolt, the Ith movable block on both sides and the IIth movable block outwards movement, pull open to setting size by torsion spring, circled round by screw rod, it is specification product that torsion spring resets indeformable again.
The invention has the advantages that simple to operate, economical and practical, cost is low, and detection speed is fast, is applicable to the detection of producing in batches.
Accompanying drawing explanation
Fig. 1 is the structural representation of bilateral torsion spring
Fig. 2 is the principle assumption diagram of using state of the present invention
Fig. 3 is the structural representation of screw rod
Fig. 4 is the principle assumption diagram of the using state of the embodiment of the present invention 2
Fig. 5 is the vertical view of embodiment 2
Fig. 6 is the A-A sectional view of Fig. 4
Fig. 7 is the structural representation of embodiment 2 movable block
Wherein: 1. the Ith guide rod 2. the Ith movable block 21. bayonet socket 22. rule 3. fixed block 4. lock-screw 5. torsion spring 6. pressing plate 7. the IIth guide rod 8. screw rod 81. handle 82. annular groove 9. the IIth movable block 10. stop screw.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed explanation, professional and technical personnel can be made more to understand the present invention, modify to following embodiment, and it is all possible for adding and replacing, and does not all exceed protection scope of the present invention.
Embodiment 1, as shown in Figure 2,3, a kind of torsion spring tensile strength brief test device, it comprises the Ith guide rod 1, the Ith movable block 2, fixed block 3, the IIth movable block 9, lock-screw 4, pressing plate 6, screw rod 8, stop screw 10.Ith movable block 2, the IIth movable block 9 lay respectively at the both sides of fixed block 3, Ith movable block 2, the IIth movable block 9 are connected by screw rod 8, the Ith guide rod 1 with fixed block 3, Ith guide rod 1 with between fixed block 3 for the transition fit limiting axial displacement is connected, Ith guide rod 1 with between the Ith movable block 2, the IIth movable block 9 for clearance fit is connected, between screw rod 8 with fixed block 3 for limit axial displacement rotating clearance fit be connected
.screw rod 8 one end is left-hand thread (LHT), the other end is right-hand thread, it is respectively left-handed, the right-hand thread that match is fixedly connected with the Ith movable block 2, the IIth movable block 9, the structure of the Ith movable block 2, the IIth movable block 9, fixed block 3 as shown in the figure, the pedestal of below for matching with screw rod 8, the Ith guide rod 1, top has the projection matched with pressing plate 6 respectively, projection has the bayonet socket 21 for clamping torque arm.Labour-saving handle 81 is connected with at the tail end of screw rod 8.Described screw rod 8 with between fixed block 3 for the clearance fit that limits axial displacement free to rotate is connected
,refer to that screw rod 8 and fixed block 3 adopt the clearance fit of axle and unthreaded hole, the center section of connection is circumferentially designed with an annular groove 82, and be fixed with stop screw in the below of the corresponding fixed block 3 of annular groove 82, the afterbody of stop screw matches with annular groove 82.Ith guide rod 1 and fixed block 3 adopt the transition fit of axle and unthreaded hole, the center section connected circumferentially is designed with an annular groove 82, stop screw is fixed with, the axial displacement between stop screw restriction the Ith guide rod 1 and fixed block 3 in the below of the corresponding fixed block 3 of annular groove 82.Projection above Ith movable block 2, the IIth movable block (9), fixed block 3 there is respectively the bayonet socket 21 placing torsion spring.Ith guide rod 1 is designed with rule 22,0 of rule for integrated connection fixing after, the junction of the Ith guide rod 1 and movable block 2.
Assembling sequence of the present invention: first assemble screw rod 8 and assemble with the Ith movable block 2 of fixed block 3-screw rod 8 left-hand thread (LHT) one end and same left-hand thread (LHT)--the IIth movable block 9 of screw rod 8 right-hand thread one end and same right-hand thread assemble-fills the Ith guide rod 1, and with stop screw 10 spacing-indexing chi 22-screw rod 8 and handle 81 fixing.
Embodiment 2, as shown in Figure 4 to 7, it improves on the basis of embodiment 1, with screw rod 8 for symcenter, has the IIth guide rod 7 with the Ith guide rod 1 same design at the symmetrical place of the Ith guide rod 1.It comprises the Ith guide rod 1 specifically, Ith movable block 2, fixed block 3, lock-screw 4, IIth movable block 9, pressing plate 6, screw rod 8, IIth guide rod 7, stop screw 10, Ith movable block 2, IIth movable block 9 lays respectively at the both sides of fixed block 3, Ith movable block 2, IIth movable block 9 and fixed block 3 are by screw rod 8, Ith guide rod 1 connects, Ith guide rod 1 with between fixed block 3 for the transition fit limiting axial displacement is connected, Ith guide rod 1 and the Ith movable block 2, for clearance fit connects between IIth movable block 9, between screw rod 8 with fixed block 3 for limit axial displacement rotating clearance fit be connected
.screw rod 8 one end is left-hand thread (LHT), the other end is right-hand thread, it is respectively left-handed, the right-hand thread that match is fixedly connected with the Ith movable block 2, the IIth movable block 9, and the top of the Ith movable block 2, the IIth movable block 9, fixed block 3 has the bayonet socket 21 matched for clamping torque arm with pressing plate 6 respectively.The part that Ith guide rod 1, the IIth guide rod 7 are connected with fixed block 3 is circumferentially designed with an annular groove 82, be fixed with stop screw 10 in the below of the corresponding fixed block 3 of annular groove 82, stop screw 10 limits the Ith guide rod 1, axial displacement between the IIth guide rod 7 and fixed block 3.Be connected with the clearance fit of unthreaded hole for axle between screw rod 8 with fixed block 3, the length of axle is slightly shorter than the width of fixed block 3 unthreaded hole, middle part is circumferentially designed with an annular groove 82, stop screw 10 is fixed with in the below of the corresponding fixed block 3 of annular groove 82, the afterbody of stop screw 10 matches with annular groove 82, and screw rod 8 can rotate and but can not move axially under the restriction of stop screw 10.Handle 81 is connected with at the afterbody of screw rod 8.It is identical with embodiment 1 that all the other do not state part.
Ith guide rod 1 or the IIth guide rod 7 are designed with rule 22,0 of rule for integrated connection fixing after, the junction of the Ith guide rod 1 or the IIth guide rod 7 and movable block 2.According to torsion spring tensile strength, precompute the length that torsion spring must stretch, and determine that soon movable and fixed block must produce much displacements.Compress torsion spring 5 torque arm respectively with 4 pressing plates 6, then lock screw 4 and lock torsion spring.Turning handle 81, screw rod 8 rotates, and the Ith movable block 2, the IIth movable block 9 produce relative displacement with fixed block 3 along guide rod, and then drive torsion spring 5 axial tension.
Assembling sequence of the present invention: first assemble screw rod 8 and fixed block 3, with stop screw 10 spacing-screw rod 8 left-hand thread (LHT) one end assembles with the Ith movable block 2 of same left-hand thread (LHT)--the IIth movable block 9 of screw rod 2 right-hand thread one end and same right-hand thread assemble-fills the Ith guide rod 1 and the IIth guide rod 7, and with stop screw 10 spacing-indexing chi 22-screw rod 8 fixes with handle 81.
Claims (8)
1. a torsion spring tensile strength brief test device, is characterized in that: it comprises the Ith guide rod (1), Ith movable block (2), fixed block (3), lock-screw (4), IIth movable block (9), pressing plate (6), screw rod (8), stop screw (10), the Ith movable block (2), IIth movable block (9) lays respectively at the both sides of fixed block (3), the Ith movable block (2), IIth movable block (9) and fixed block (3) are by screw rod (8), Ith guide rod (1) connects, the Ith guide rod (1) with between fixed block (3) for transition fit limit axial displacement is connected, the Ith guide rod (1) and the Ith movable block (2), be that clearance fit connects between IIth movable block (9), between screw rod (8) with fixed block (3) be limit axial displacement rotating clearance fit be connected, screw rod (8) one end is left-hand thread (LHT), and the other end is right-hand thread, it and the Ith movable block (2), IIth movable block (9) is respectively match left-handed, right-hand thread is fixedly connected with, the Ith movable block (2), IIth movable block (9), the top of fixed block (3) has respectively matches for the bayonet socket (21) clamping torque arm with pressing plate (6).
2. a kind of torsion spring tensile strength brief test device according to claim 1, is characterized in that: with screw rod (8) for symcenter, has the IIth guide rod (7) with the Ith guide rod (1) same design at the symmetrical place of the Ith guide rod (1).
3. a kind of torsion spring tensile strength brief test device according to claim 1, is characterized in that: be connected with handle (81) at the tail end of screw rod (8).
4. a kind of torsion spring tensile strength brief test device according to claim 1, it is characterized in that: described screw rod (8) with between fixed block (3) for limit axial displacement rotating clearance fit be connected, refer to that screw rod (8) and fixed block (3) adopt the clearance fit of axle and unthreaded hole, the center section connected circumferentially is designed with an annular groove (82), be fixed with stop screw (10) in the below of the corresponding fixed block (3) of annular groove (82), the afterbody of stop screw (10) matches with annular groove (82).
5. a kind of torsion spring tensile strength brief test device according to claim 1, it is characterized in that: the Ith described guide rod (1) is connected with the transition fit of the restrictive axial displacement of unthreaded hole for axle with between fixed block (3), refer to that the Ith guide rod (1) and fixed block (3) adopt the transition fit of axle and unthreaded hole, the center section connected circumferentially is designed with an annular groove (82), stop screw (10) is fixed with in the below of the corresponding fixed block (3) of annular groove (82), axial displacement between stop screw (10) restriction the Ith guide rod (1) and fixed block (3).
6. a kind of torsion spring tensile strength brief test device according to claim 1, is characterized in that: the Ith movable block (2), the IIth movable block (9), fixed block (3) top has the bayonet socket (21) placing torsion spring respectively.
7. a kind of torsion spring tensile strength brief test device according to claim 1, is characterized in that: on the Ith guide rod (1) or the IIth guide rod (7), be designed with rule (22).
8. a kind of torsion spring tensile strength brief test device according to claim 1, is characterized in that: 0 of rule (22) for integrated connection fixing after, the junction of the Ith guide rod (1) or the IIth guide rod (7) and the Ith movable block (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410560752.3A CN104316402B (en) | 2014-10-21 | 2014-10-21 | A kind of torsion spring tensile strength brief test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410560752.3A CN104316402B (en) | 2014-10-21 | 2014-10-21 | A kind of torsion spring tensile strength brief test device |
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| CN104316402A true CN104316402A (en) | 2015-01-28 |
| CN104316402B CN104316402B (en) | 2016-08-17 |
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| CN201410560752.3A Active CN104316402B (en) | 2014-10-21 | 2014-10-21 | A kind of torsion spring tensile strength brief test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107991043A (en) * | 2018-01-25 | 2018-05-04 | 万向钱潮（上海）汽车系统有限公司 | A kind of return spring measuring device |
| CN108195670A (en) * | 2017-11-22 | 2018-06-22 | 长沙双合盛企业管理有限公司 | A kind of building tubing sections strength testing device |
| CN110530719A (en) * | 2019-08-30 | 2019-12-03 | 湖北三江航天江河化工科技有限公司 | Propellant one directional tensile test device and method |
| CN112067478A (en) * | 2020-09-14 | 2020-12-11 | 浙江埃特斯力试验设备有限公司 | Be applied to diversified fatigue testing machine of torsional spring |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108195670A (en) * | 2017-11-22 | 2018-06-22 | 长沙双合盛企业管理有限公司 | A kind of building tubing sections strength testing device |
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| CN110530719A (en) * | 2019-08-30 | 2019-12-03 | 湖北三江航天江河化工科技有限公司 | Propellant one directional tensile test device and method |
| CN112067478A (en) * | 2020-09-14 | 2020-12-11 | 浙江埃特斯力试验设备有限公司 | Be applied to diversified fatigue testing machine of torsional spring |
| CN112067478B (en) * | 2020-09-14 | 2022-10-04 | 浙江埃特斯力试验设备有限公司 | Be applied to diversified fatigue testing machine of torsional spring |
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