The plane scroll spring life testing machine
The present invention relates to the plane scroll spring field tests, particularly a kind of instrument that can test 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 fixing with mandrel 3 by speed reduction unit 5, shaft coupling 4.During test, plane scroll spring is fixed between shaft collar 2 and the mandrel 3 and by pressing plate 1 and pushes down, and starter motor 6 makes mandrel 3 rotations, and plane scroll spring begins mathematic(al) expectation.To plane scroll spring fracture, because of mandrel 3 and motor 6 still in rotation, feedback not, counting is also still continuing, therefore, the test plane scroll spring need someone be supervised, and the life-span error that the actual life of plane scroll spring and the test of plane scroll spring life testing machine show is larger.
Summary of the invention
Technical matters to be solved by this invention is to overcome the above-mentioned deficiency of prior art and a kind of plane scroll spring life testing machine is provided, life-span that can the Accurate Measurement plane scroll spring.
The present invention solves the problems of the technologies described above the technical scheme that adopts:
The 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 the rotating disk, the other end is fixed on curling tool, main shaft is connected with rotating disk, the driving mechanism drive shaft, mandrel is set in the main shaft and is supported by bearing, mandrel one end passes rotating disk and fixes with curling tool, the mandrel other end and connecting rod are fixed, and be spacing in the stopper slot of connecting rod by the limited block of vertical lower, and approach switch is arranged on the connecting rod swing path, connecting rod is because starting driving mechanism near approach switch, and connecting rod is closed driving mechanism because leaving approach switch.
Better, above-mentioned mandrel is divided into mandrel I and mandrel II, and mandrel I one end passes rotating disk and fixes with curling tool, and the mandrel I other end and mandrel II one end are fixed, and the mandrel II other end and connecting rod are fixed, and mandrel can be processed better like this.
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 on the main shaft, driving gear and follower gear engagement.
Better, said motor links to each other with main shaft by speed reduction unit.
Compared with prior art, the invention has the advantages that: because the opening and closing of approach switch control motor are set, and remove to touch approach switch by the fracture of plane scroll spring, when therefore testing, in the intact situation of plane scroll spring, spring is behind pretension, and equipment runs well.Otherwise after the spring weak point split, the equipment auto stop was no longer counted, and therefore can accurately test the life-span number of times, and motor can quit work in time.
Description of drawings
Fig. 1 is existing plane scroll spring life testing machine structural representation.
Fig. 2 is the explosive view of embodiment of the invention plane scroll spring life testing machine.
Fig. 3 is the structural representation of embodiment of the invention plane scroll spring life testing machine.
Fig. 4 is the vertical view of embodiment of the invention plane scroll spring life testing machine.
The invention will be further described below in conjunction with accompanying drawing embodiment.
Such as Fig. 2, shown in Figure 3, mandrel I 7 front ends and rotating disk 25 are fixing, and curling tool 37 is fixed on the mandrel I 7, and mandrel I 7 is connected with mandrel II 14, and mandrel II 14 rear portions are by supporting holder assembly 16 supportings, and mandrel II 14 rear ends and connecting rod 32 are fixing.
Main shaft 11 is enclosed within on mandrel I 7 and the mandrel II 14, and mandrel I 7 is supported by main shaft 11 by bearing 8, and main shaft 11 front ends are bearing on the front-end bearing pedestal assembly 9 by bearing, and the rear end is by bearing block assembly 15 supportings.
Connecting rod 32 is spacing by the stopper slot 311 of the limited block 31 of vertical lower, and stopper slot 311 width are greater than the width of connecting rod 32, so connecting rod 32 can swing under the twisting force of mandrel II 14, but owing to the restriction of stopper slot 311, its oscillating stroke is limited.
Approach switch (not shown in FIG.) is arranged on connecting rod 32 and swings on the path, and connecting rod 32 is because starting motor 6 near approach switch, and connecting rod 32 is because leaving approach switch disable motor 6.
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 Fig. 4 is seen in driving gear and follower gear engagement.When follower gear 34 during by driving gear 20 driven rotary, main shaft 11 is and then rotation also, the other end of main shaft 11 is installed on the rotating disk 25, main shaft 11 rotates then also and then rotation of rotating disk 25, but because main shaft 11 does not contact with mandrel II 14 with mandrel I 7, so mandrel I 7 can and then not rotated with mandrel II 14.
The miscellaneous part of above-mentioned driving mechanism and test machine all is fixed on the frame 21.
In plane scroll spring when test,, the outer hook end of plane scroll spring is fixed on the rotating disk 25 by chuck 24, and the hook end is fixed on the curling tool 37 in the plane scroll spring, and spacing by pressing plate 1, prevents that plane scroll spring from deviating from.
Need first predetermined 3-4 circle at test frontal plane scroll spring, namely rotating disk 25 turns first the 3-4 circle, because the interior hook end of plane scroll spring pretension 3-4 circle back plane scroll spring will be stressed, and the interior hook end of plane scroll spring is fixed on the curling tool 37, so curling tool 37 is stressed too.Curling tool 37 links to each other 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, he will swing to the right when being subjected to dextrorotation power, he will swing left when being subjected to left-handed power, and stressed direction depends on the direction of plane scroll spring pretension.General closed planar scroll spring pretension only has a direction, so connecting rod 32 also only can swing toward a direction, approach switch then is installed in that direction that connecting rod 32 swings, and when connecting when catching up with connecting rod 32 pendulum to come, then the approach switch opertaing device runs well.After the 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, can be again to the direction swing of approach switch, and approach switch then opertaing device shuts down.