Plane scroll spring life testing machine
the present invention relates to plane scroll spring field tests, particularly a kind of instrument can testing the plane scroll spring life-span.
as shown in Figure 1, existing plane scroll spring life testing machine, comprises pressing plate 1, shaft collar 2, mandrel 3, shaft coupling 4, reductor 5, motor 6, and motor 6 is fixed with mandrel 3 by speed reduction unit 5, shaft coupling 4.During test, plane scroll spring to be fixed between shaft collar 2 and mandrel 3 and to be pushed down by pressing plate 1, and starter motor 6 makes mandrel 3 rotate, and plane scroll spring starts mathematic(al) expectation.To plane scroll spring fracture, because mandrel 3 and motor 6 are still in rotation, not feedback, counting is also still in continuation, therefore, test plane scroll spring need someone be supervised, and it is larger that the actual life of plane scroll spring and plane scroll spring life testing machine test the life error shown.
Summary of the invention
technical matters to be solved by this invention be overcome prior art above-mentioned deficiency and a kind of plane scroll spring life testing machine is provided, can life-span of Accurate Measurement plane scroll spring.
the present invention solves the problems of the technologies described above adopted technical scheme:
plane scroll spring life testing machine, comprise driving mechanism, main shaft, pressing plate, rotating disk, mandrel, curling tool, plane scroll spring one end is fixed on rotating disk, the other end is fixed on curling tool, main shaft is connected with rotating disk, driving mechanism drive shaft, in main shaft, mandrel is set and is supported by bearing, mandrel one end is passed rotating disk and is fixed with curling tool, the mandrel other end and connecting rod are fixed, connecting rod is by spacing in the stopper slot of the limited block of vertical lower, proximity switch is arranged on connecting rod swing path, connecting rod is because starting driving mechanism near proximity switch, connecting rod closes driving mechanism because leaving proximity switch.
better, above-mentioned mandrel is divided into mandrel I and mandrel II, and mandrel I one end is passed rotating disk and fixed with curling tool, and mandrel I other end and mandrel II one end are fixed, and mandrel II other end and connecting rod are fixed, and such mandrel can be processed better.
better, above-mentioned driving mechanism comprises motor, driving gear, follower gear, and electric machine main shaft connects driving gear, and follower gear is enclosed within main shaft, and driving gear engages with follower gear.
better, above-mentioned motor is connected with main shaft by speed reduction unit.
compared with prior art, the invention has the advantages that: control motor opening and closing owing to arranging proximity switch, and gone to touch proximity switch by the fracture of plane scroll spring, when therefore testing, when plane scroll spring is intact, spring is after pretension, and equipment runs well.Otherwise, spring is short split after, equipment auto stop no longer counts, therefore, it is possible to accurate test life-span number of times, and motor can quit work in time.
Accompanying drawing explanation
fig. 1 is existing plane scroll spring life testing machine structural representation.
fig. 2 is the explosive view of embodiment of the present invention plane scroll spring life testing machine.
fig. 3 is the structural representation of embodiment of the present invention plane scroll spring life testing machine.
fig. 4 is the vertical view of embodiment of the present invention plane scroll spring life testing machine.
below in conjunction with accompanying drawing embodiment, the invention will be further described.
as shown in Figure 2 and Figure 3, mandrel I 7 front end and rotating disk 25 are fixed, and curling tool 37 is fixed on mandrel I 7, and mandrel I 7 is connected with mandrel II 14, and mandrel II 14 rear portion is supported by supporting holder assembly 16, and mandrel II 14 rear end and connecting rod 32 are fixed.
main shaft 11 is enclosed within mandrel I 7 with on mandrel II 14, and mandrel I 7 is supported by main shaft 11 by bearing 8, and main shaft 11 front end is bearing on front-end bearing pedestal assembly 9 by bearing, and rear end is supported by bearing block assembly 15.
connecting rod 32 is spacing by the stopper slot 311 of the limited block 31 of vertical lower, and stopper slot 311 width is greater than the width of connecting rod 32, and therefore connecting rod 32 can swing under the twisting force of mandrel II 14, but due to the restriction of stopper slot 311, its oscillating stroke is limited.
proximity switch (not shown in FIG.) is arranged on connecting rod 32 and swings on path, and connecting rod 32 is because starting motor 6 near proximity switch, and connecting rod 32 is disable motor 6 because leaving proximity switch.
driving mechanism comprises motor 6, driving gear 20, follower gear 34, and motor connects driving gear 20 by speed reduction unit 5, and driven tooth wheel case 34 is on main shaft 11, and driving gear engages with follower gear, sees Fig. 4.When follower gear 34 is by driving gear 20 driven rotary, main shaft 11 also and then rotates, the other end of main shaft 11 is arranged on rotating disk 25, main shaft 11 rotates then rotating disk 25 and also and then rotates, but because main shaft 11 does not contact with mandrel II 14 with mandrel I 7, so mandrel I 7 and mandrel II 14 can not and then rotate.
the miscellaneous part of above-mentioned driving mechanism and test machine is all fixed in frame 21.
during plane scroll spring test, the outer hook end of plane scroll spring is fixed on rotating disk 25 by chuck 24, and in plane scroll spring, hook end is fixed on curling tool 37, and spacing by pressing plate 1, prevents plane scroll spring from deviating from.
plane scroll spring needs first predetermined 3-4 circle before testing, namely rotating disk 25 first turns 3-4 circle, because plane scroll spring pretension 3-4 encloses in back plane scroll spring, hook end will be stressed, and the interior hook end of plane scroll spring is fixed on curling tool 37, so curling tool 37 is stressed too.Curling tool 37 is connected with mandrel II 14, connecting rod 32 is connected to again the other end of mandrel II 14, so connecting rod 32 is also stressed, will swing after connecting rod 32 is stressed, such as by when dextrorotation power, he will swing to the right, by when left-handed power, he will swing left, and the direction of plane scroll spring pretension is depended in stressed direction.General closed planar scroll spring pretension only has a direction, so connecting rod 32 also swings in the past direction of a meeting, proximity switch is then arranged on that direction that connecting rod 32 swings, in time even catching up with connecting rod 32 pendulum to come, then and proximity switch opertaing device normal operation.When after plane scroll spring fracture, the interior hook end of plane scroll spring is just no longer stressed, and connecting rod 32 has not just stressed yet, and can not swing to the direction of proximity switch, proximity switch then opertaing device shuts down again.