CN204043828U - The torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring - Google Patents
The torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring Download PDFInfo
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- CN204043828U CN204043828U CN201420466853.XU CN201420466853U CN204043828U CN 204043828 U CN204043828 U CN 204043828U CN 201420466853 U CN201420466853 U CN 201420466853U CN 204043828 U CN204043828 U CN 204043828U
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Abstract
The utility model relates to a kind of frock clamp of moment of torsion of anti-push type torsionspring.A kind of torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring, comprise two coaxial working bases, the center of working base is provided with cushion block, cushion block has lead angle, each working base is all provided with an overcoat, between two working bases, is provided with locating shaft, the two ends of locating shaft are each passed through overcoat and are fixed on the working base at locating shaft two ends, working base is provided with overcoat, is provided with braking boss at the inwall of overcoat.The utility model provides one and can effectively prevent the first swell of the both ends of the spring when testing from affecting test result, meets the frock clamp of the torsion-testing of the anti-push type spring that both ends of the spring circle does not also tightly polish; Solve exist in prior art for counter push away spring torque test time due to the first swell of both ends of the spring circle, the torsional displacement of middle building ring is changed, accurately can not record the technical matters of the moment of torsion of spring.
Description
Technical field
The utility model relates to a kind of frock clamp, particularly relates to a kind of frock clamp of the moment of torsion for the anti-push type torsionspring of Test Application in motor car engine belt tension device.
Background technology
Anti-push type torsionspring, is used in motor car engine belt tension device, is the key components and parts in belt tension device.By the setting angle of adjustment change spring and working torsional angle degree during use, make torsionspring produce corresponding moment of torsion, reach the function regulating dynamo belt tensioner.
In disclosed patent document, disclose a kind of device for being fixedly used in the spring in machinery or instrument, " Chinese patent: a kind of for spring torque test stationary installation (CN203231844U) ", comprise test support, be fixed on test support on the first hold-down support and the second hold-down support; Described first hold-down support is provided with a mobile disk, the groove be provided with on the end face of the second hold-down support for fixing spring of mobile disk; Described second hold-down support is fixed with installation cylinder, described installation cylinder is provided with the annular groove for mounting spring and the spring hoop for fixing spring.This device can not test anti-push type torsionspring, and between two hold-down supports after fixing spring, spring easily departs from after reversing, and test effect is bad.
Summary of the invention
It is simple that the utility model provides a kind of structure, effectively preventing the first swell of the both ends of the spring when testing from affecting test result, meeting the frock clamp of the torsion-testing of the anti-push type spring that both ends of the spring circle does not also tightly polish; Solve exist in prior art for counter push away spring torque test time due to the first swell of both ends of the spring circle, the torsional displacement of middle building ring is changed, accurately can not record the technical matters of the moment of torsion of spring.
Above-mentioned technical matters of the present utility model is solved by following technical proposals: a kind of torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring, comprise two coaxial working bases, the center of working base is provided with cushion block, cushion block has a lead angle coordinated with torsion spring end to be tested, each working base is all provided with an overcoat, locating shaft is provided with between two working bases, the two ends of locating shaft are each passed through overcoat and are fixed on the working base at locating shaft two ends, working base is provided with overcoat, cushion block on working base, locating shaft and overcoat arranged concentric, braking boss is provided with at the inwall of described overcoat.Two working bases are flange plate-like, and working base offers bolt hole, by bolt, working base are fixed on the ring flange connection for transmission of machine for testing torsion.Two coaxial reverse rotations of working base, simulate and instead push away spring anti-working condition pushing away torsion in automobile assembly.Locating shaft is fixed on working base, and spring housing is connected on locating shaft, the effect that locating shaft plays a guiding installation to spring and supports, and spring can not sideslip.And ensure that spring to be tested is contained in the length after on working base by the length of locating shaft, thus according to behaviour in service, pre-shock mount can be carried out and then tests.Cushion block has lead angle, is connected on cushion block by the two ends of spring, and spring is installed between two working bases after being compressed to the axial setting height(from bottom) of specifying.Working base is provided with overcoat simultaneously, the internal diameter of overcoat is greater than the external diameter of spring, there is braking boss the inwall of overcoat is one-body molded, effectively avoid anti-both ends of the spring circle first swell when pushing away torsion, guarantee the torsional displacement of building ring in the middle of spring, thus improve the accuracy of test, also can avoid the swell due to end circle, end circle produces abnormal sound with overcoat.Because the anti-push type spring end circle used on motor car engine belt tension device does not also tightly polish, therefore to be supported by the two ends of cushion block to spring at the center of working base.Working base and cushion block are overall processing.
As preferably, described locating shaft comprises locating shaft main body and is positioned at the coupling shaft at locating shaft main body two ends, coupling shaft is plugged in the through hole at working base center, the length of locating shaft main body is Hd, Hd=Lg-1, wherein Lg is the setting height(from bottom) of torsionspring to be tested, locating shaft outer diameter D d=Di min-1.5, and wherein Di min is the minimum value of spring inside diameter.The length of torsionspring is slightly long, therefore when spring housing is connected on locating shaft, can by the two ends of locating shaft disengaging working base slightly, there is a little space in the place that locating shaft is contacted with working base, friction effects test result during to avoid torsion-testing between locating shaft and working base, makes test result more accurate.Because need spring housing to be connected on locating shaft, counter pushing away when spring torque is tested is a kind of to-and-fro movement, and turn swell reduces again, therefore needs the minimum diameter considering spring when Design Orientation axle external diameter, prevents from affecting spring performance during test.
As preferably, described working base offers annular slot, draw-in groove comprises braking boss draw-in groove and overcoat draw-in groove, and overcoat is fixed on working base by draw-in groove, and one end of boss draw-in groove overlaps with the reference position of the lead angle of cushion block.The shape of draw-in groove, according to the profile design of overcoat, is clearance fit between working base and overcoat, and boss draw-in groove can also help outer being enclosed within working base to position and install.One end of boss draw-in groove overlaps with the reference position of cushion block, namely overlaps with the reference position of spring, can ensure when working base reverse rotation, and end circle internal diameter becomes greatly to be prevented at once, thus improves the accuracy of torsion-testing.
As preferably, described cushion block is annular, the internal diameter of cushion block is identical with the external diameter of locating shaft main body, the external diameter of cushion block is identical with the internal diameter of overcoat, the lead angle of cushion block is 225 ° time, lift height is truncated, and helix angle and the lift of described cushion block are calculated as follows: α=actag (t/ π D); T=(Lg-d)/n; H1=0.25t; H2=0.625t, in formula: alpha-helix angle; D-mean diameter of coil; T-spring pitch; Lg-spring fitting height; D-spring material wire diameter; N-active spring coils; The lift height of h1-90 °; The lift height of h2-225 °.The design of the spiral lift of cushion block calculates lift angle at 0 ° ~ 360 ° according to Lg and the number of coils, due to spring two ends not and tightly polish, spring entirety is each circle equal helix angle, and pitch is even.Therefore, when keeping flat, spring has inclination.Design is at lift angle 225 ° time, and spring is just in time concordant.By the design of above-mentioned parameter, can ensure that both ends of the spring is by cushion block supporting and location, can better torsion-testing be carried out.
As preferably, described braking boss is arcuation, and the angle of braking boss is 30 ° ~ 90 °, the width B=d+2 of braking boss, and wherein d is spring material wire diameter; The radius R p=(De max+ ψ 1*Dmax/2 π n)/2 of braking boss, the wherein maximal value of De max--spring outer diameter; ψ 1--limiting displacement drift, the maximal value of Dmax--mean diameter of coil; Outer casing internal diameter Dh=2* (Rp+A), wherein A is the thickness of braking boss, 0.8mm≤A≤1.5mm; The height of overcoat is h=2d, and wherein d is spring material wire diameter.The angle of braking boss is 30 ° ~ 90 °, is to ensure that the two ends of spring do not produce swell prior to mesosphere when 0.25 circle intort.The design of braking boss can ensure counter push away torsion time spring end circle can not swell by boss restriction, thus the torsional displacement of building ring in the middle of ensureing.The outer ring of spring touches the internal diameter less than overcoat, leaves gap between, ensureing, when carrying out torsion-testing, can not affect the distortion of spring, also can not be affected because of friction force.Braking boss is positioned at the side near cushion block, can ensure that the end circle to being connected on cushion block limits, and can not affect middle building ring.
As preferably, the length of the locating shaft main body of locating shaft is greater than the length sum of two overcoats.Leave gap, the reduction length of the determination spring of locating shaft between two overcoats, overcoat plays one to spring and prevents two ends from enclosing swell, and fix one of both ends of the spring, prevent both ends of the spring from jumping out, the test effect of the moment of torsion being is more stable simultaneously.
Therefore, the torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring of the present utility model possesses following advantage: 1, one-body molded on working base have cushion block, and cushion block possesses a lead angle, the spring that two ends can be allowed also tightly not touch board can better be supported, and completes the test of moment of torsion; 2, one-body molded on the inwall of overcoat have braking boss, effectively can avoid anti-both ends of the spring circle first swell when pushing away torsion, guarantee the torsional displacement of building ring in the middle of spring; 3, the length of locating shaft is slightly less than the axial setting height(from bottom) of appointment of spring, and when can avoid testing, the impact of friction force, improves the accuracy of the result of test.
Accompanying drawing explanation
Fig. 1 is that the solid of the torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring of the present utility model uses schematic diagram.
Fig. 2 is the front sectional view of the torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring of the present utility model.
Fig. 3 is the front view of the working base in Fig. 1.
Fig. 4 is the cut-open view of Fig. 3.
Fig. 5 is the lead angle enlarged diagram of the cushion block in Fig. 3.
Fig. 6 is the front view of the overcoat in Fig. 1.
Fig. 7 is the cut-open view of Fig. 6.
Fig. 8 is the front view of the locating shaft in Fig. 1.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical scheme of utility model is described in further detail.
Embodiment:
As illustrated in fig. 1 and 2, a kind of torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring, comprise two working bases be mounted opposite 2, two working bases 2 are in ring flange shape, uniformly in the outer ring of work clothes 2 offer bolt hole 4, by bolt 7, work clothes are fixed in the ring flange (not shown) of machine for testing torsion.As shown in Fig. 3 and 4 and 5, forming xsect at the central integral of working base 2 is circular cushion block 10, the end face of spring 3 to be tested is placed on cushion block 10, cushion block 10 has a bolt lift angle, the design of the spiral lift of cushion block 10 is truncated 225 ° of position lift height, make spring to be tested concordant by the support two ends of cushion block, namely the end face of spring to be tested is leveled up by cushion block.The center of cushion block 10 offers a stair-stepping through hole 6, is plugged with locating shaft 5 in the through hole of cushion block 10, and locating shaft 5 comprises locating shaft main body 12 and is positioned at the coupling shaft 13 (as shown in Figure 8) at locating shaft main body 12 two ends.Working base 2 offers annular slot, and it is outer concentric with cushion block 10 that annular slot is opened in cushion block 10.As shown in Figures 6 and 7, in the annular slot outside cushion block 10, be connected with overcoat 1, overcoat 1 shape ringwise, the inwall of overcoat 1 one-body molded have braking boss 11.Braking boss 11 is parallel to each other with overcoat 1, and the radian of braking boss 11 is pi/2.Corresponding to the shape of overcoat, annular slot comprises braking boss draw-in groove 9 and overcoat draw-in groove 8, and overcoat 1 and draw-in groove are clearance fit, and overcoat 1 is fixed on working base by draw-in groove, and one end of boss draw-in groove 9 overlaps with the reference position S of the lead angle of cushion block 10.
Both ends of the spring circle to be tested does not also tightly polish, and spring entirety to be tested is each circle equal helix angle, and pitch is even.The length of locating shaft is greater than the length sum of two overcoats, and locating shaft is plugged on working base and forms skeleton, leaves gap between two overcoats.The two ends of spring to be tested are connected on cushion block, spring cross-under to be tested on locating shaft, then by spring-compressed to be tested to the axial setting height(from bottom) Lg of appointment, the working base at two ends oppositely rotates relatively along with the rotation of machine for testing torsion, and so forth, the test of moment of torsion is carried out.Because the braking boss on the inwall of overcoat, prevent the first swell in the two ends of spring, ensure that the torsional displacement of building ring in the middle of spring, and the inwall of overcoat is not wanted to contact all the time with spring.
In order to prevent when torsion-testing, the friction effects test result between locating shaft and working base, designs the height H d of locating shaft, Hd=Lg-1, and locating shaft outer diameter D d designs, Dd=Di min-1.5, and wherein Di min is the minimum value of spring inside diameter.
The design of cushion block spiral lift: the lift angle calculating 0 ° ~ 360 ° by Lg and the number of coils, truncated 225 ° of position lift height.Cushion block internal diameter=locating shaft outer diameter D d, cushion block external diameter=outer casing internal diameter.Cushion block helix angle and lift are calculated as follows:
α＝actag(t/πD)；t＝(Lg-d)/n；h1＝0.25t；h2＝0.625t。
In formula: α--helix angle; D--mean diameter of coil; T--spring pitch; Lg--spring fitting height; D--spring material wire diameter; N--active spring coils; The lift height of h1--90 °; The lift height of h2--225 °.
Jacket designs: platform inside radius Rp=(De max+ ψ 1*Dmax/2 π n)/2 is protruded in braking,
The thickness A protruding platform presses 1.3mm, protrudes the width B=d+2 of platform;
Outer casing internal diameter designs: Dh=2* (Rp+A); Overcoat relative datum height=2*d
In formula: the maximal value of De max--spring outer diameter; ψ 1--limiting displacement drift (unit is radian), the maximal value of Dmax--mean diameter of coil.
Claims (9)
1. the torsion-testing assembled tool of an anti-push type expansion tightening wheel torsionspring, it is characterized in that: comprise two working bases, the center of working base is provided with cushion block, cushion block has a lead angle coordinated with torsion spring end to be tested, each working base is all provided with an overcoat, locating shaft is provided with between two working bases, the two ends of locating shaft are each passed through overcoat and are fixed on the working base at locating shaft two ends, working base is provided with overcoat, cushion block on working base, locating shaft and overcoat arranged concentric, be provided with braking boss at the inwall of described overcoat.
2. the torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring according to claim 1, it is characterized in that: described locating shaft comprises locating shaft main body and is positioned at the coupling shaft at locating shaft main body two ends, coupling shaft is plugged in the through hole at working base center, the length of locating shaft main body is Hd, Hd=Lg-1, wherein Lg is the setting height(from bottom) of torsionspring to be tested, locating shaft outer diameter D d=Di min-1.5, and wherein Di min is the minimum value of spring inside diameter.
3. the torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring according to claim 1 and 2, it is characterized in that: described working base offers annular slot, draw-in groove comprises braking boss draw-in groove and overcoat draw-in groove, overcoat is fixed on working base by draw-in groove, and one end of boss draw-in groove overlaps with the reference position of the lead angle of cushion block.
4. the torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring according to claim 1 and 2, it is characterized in that: described cushion block is annular, the internal diameter of cushion block is identical with the external diameter of locating shaft main body, the external diameter of cushion block is identical with the internal diameter of overcoat, the lead angle of cushion block is 225 ° time, lift height is truncated, and helix angle and the lift of described cushion block are calculated as follows: α=actag (t/ π D); T=(Lg-d)/n; H1=0.25t; H2=0.625t, in formula: alpha-helix angle; D-mean diameter of coil; T-spring pitch; Lg-spring fitting height; D-spring material wire diameter; N-active spring coils; The lift height of h1-90 °; The lift height of h2-225 °.
5. the torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring according to claim 3, it is characterized in that: described cushion block is annular, the internal diameter of cushion block is identical with the external diameter of locating shaft main body, the external diameter of cushion block is identical with the internal diameter of overcoat, the lead angle of cushion block is 225 ° time, lift height is truncated, and helix angle and the lift of described cushion block are calculated as follows: α=actag (t/ π D); T=(Lg-d)/n; H1=0.25t; H2=0.625t, in formula: alpha-helix angle; D-mean diameter of coil; T-spring pitch; Lg-spring fitting height; D-spring material wire diameter; N-active spring coils; The lift height of h1-90 °; The lift height of h2-225 °.
6. the torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring according to claim 1 and 2, it is characterized in that: described braking boss is arcuation, the angle of braking boss is 30 ° ~ 90 °, the width B=d+2 of braking boss, and wherein d is spring material wire diameter; The radius R p=(De max+ ψ 1*Dmax/2 π n)/2 of braking boss, the wherein maximal value of De max--spring outer diameter; ψ 1--limiting displacement drift, the maximal value of Dmax--mean diameter of coil; Outer casing internal diameter Dh=2* (Rp+A), wherein A is the thickness of braking boss, 0.8mm≤A≤1.5mm; The height of overcoat is h=2d, and wherein d is spring material wire diameter.
7. the torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring according to claim 5, it is characterized in that: described braking boss is arcuation, the angle of braking boss is 30 ° ~ 90 °, the width B=d+2 of braking boss, and wherein d is spring material wire diameter; Radius R p=(the De max+ ψ of braking boss
1* Dmax/2 π n)/2, the wherein maximal value of De max--spring outer diameter; ψ
1--limiting displacement drift, the maximal value of Dmax--mean diameter of coil; Outer casing internal diameter Dh=2* (Rp+A), wherein A is the thickness of braking boss, 0.8mm≤A≤1.5mm; The height of overcoat is h=2d, and wherein d is spring material wire diameter.
8. the torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring according to claim 1 and 2, is characterized in that: the length of the locating shaft main body of locating shaft is greater than the length sum of two overcoats.
9. the torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring according to claim 7, is characterized in that: the length of the locating shaft main body of locating shaft is greater than the length sum of two overcoats.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420466853.XU CN204043828U (en) | 2014-08-18 | 2014-08-18 | The torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring |
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| CN201420466853.XU CN204043828U (en) | 2014-08-18 | 2014-08-18 | The torsion-testing assembled tool of anti-push type expansion tightening wheel torsionspring |
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| CN204043828U true CN204043828U (en) | 2014-12-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969863A (en) * | 2017-05-19 | 2017-07-21 | 重庆望江工业有限公司 | A kind of fixing device on helical spring torque detecting apparatus |
| CN111043937A (en) * | 2019-12-27 | 2020-04-21 | 岱高（苏州）汽车零部件有限公司 | Method for detecting a helix angle |
-
2014
- 2014-08-18 CN CN201420466853.XU patent/CN204043828U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969863A (en) * | 2017-05-19 | 2017-07-21 | 重庆望江工业有限公司 | A kind of fixing device on helical spring torque detecting apparatus |
| CN106969863B (en) * | 2017-05-19 | 2023-02-21 | 重庆望江工业有限公司 | Fixing device on spiral spring torque detection equipment |
| CN111043937A (en) * | 2019-12-27 | 2020-04-21 | 岱高（苏州）汽车零部件有限公司 | Method for detecting a helix angle |
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