CN2121023U - Mechanical internal force rectangle gear load-on device - Google Patents

Abstract

The utility model relates to a mechanical internal force rectangle gear load-on device, which is mainly used for testing the abrasion, the fatigue and the reliable test of the chain transmission on the testing stand. The mechanical internal force rectangle gear load-on device comprises a stepping motor, a synchronous decelerator, a decelerator bracket, a loader wire rod, a shifting fork, gear carrier. Which is characterized in that the inner hole of the load-on sleeve of the gear load-on device is respectively inner inclined teeth and inner straight teeth, and the inner hole is correspondingly engaged with an inclined gear 12 and a straight gear 16. The inner parts of both the inclined gear 12 and the straight gear 16 are provided with two semi shafts. When the shifting fork 10 drives the load-on sleeve 14 to slide left and right, the two semi shafts rotate, which leads the increasing or decreasing of the tension force of the fastening edge of the chain, and the testing goal is reached. The utility model has the advantages of stable loading, small volume, low noise, easy realization of automatic control, energy saving, etc.

Description

Mechanical internal force rectangle gear load-on device

Mechanical type moment of resistance gear charger of the present utility model is mainly used in the test of chaindriven wearing and tearing, fatigue and fail-test on the testing table.

Confining force streaming testing table is a kind of test unit commonly used of mechanical industry, carrying out chaindriven wearing and tearing, during the test of tired and fail-test or other purposes, key mechanism is a charger, because chain transmission wearing and tearing elongation is bigger, if the structure of charger can not adapt to this operating mode, then along with the chain wear elongation, load in the closed-loop path can decay quite soon, at present be to adopt a kind of in hydraulic type or the mechanical type basically when selecting charger for use, some advanced testing tables often adopt hydraulic loading device, and its version can be divided into: vane type, gear type, spiral, lever etc.The hydraulic loading device of the testing table that the chain industry is adopted all has can realize automatic control, load load stablizes advantage, but its structure is complicated, the machining precision height, also need establish Hydraulic Station in addition, so the total cost height, simultaneously from the testing table overall design, moulding is messy, be not easy to on-the-spot operation and management, and, be easy to the test for contamination scene with being difficult to avoid owing to will produce leakage with the machinery oil loading; The another kind of charger of confining force streaming testing table is a machinery loading device, mainly contain the screw-casing cartridge type, feed screw nut formula, rope and pulley type, helical spring type etc. are though above-mentioned mechanical load is simple in structure, transmission efficiency is high, but difficulty during its regulating load also is not easy to realize servocontrol.

We have carried out comprehensive analysis and research analyzing on the basis of above-mentioned two kinds of chargers to existing various forms of chargers, have proposed a kind of newly, avoid the mechanical type moment of resistance gear charger of above-mentioned deficiency.

The utility model mainly comprises stepper motor, synchronous speed reduction unit, reducer stent, the loader screw mandrel, shift fork and gear charger, it is characterized in that: gear charger 4 is connected and composed by following part, the endoporus two ends that load cover 14 are interior helical teeth and interior straight-tooth, its endoporus is corresponding to be meshed with spiral gear 12 and spur gear 16, semiaxis 7,7 ' an end in spiral gear 12 and spur gear 16 by key 8,8 ' and ring washer 13,13 ' be attached thereto fixing, in the outer rim that loads cover 14 shift fork 10 is installed, and thrust bearing 11 is installed simultaneously in the both sides of shift fork 10,11 ', by packing ring 9, and nut 15,15 ' be fastened on to load and overlap on 14, be connected by shift fork 10 and loader screw mandrel 6 between gear charger 4 and stepper motor 1 and the synchronous speed reduction unit 2, shift fork 10 is threaded with loader screw mandrel 6, and by regulating support 5, reducer stent 3 is fixing.The above-mentioned shift fork of mentioning 10 1 ends are threaded hole, other end Da Yuan hole one both ends of the surface band seam.

Fig. 1 is the auto-loading system of the driven shaft parts of confining force streaming motorcycle high-speed test (HST) platform, this loading system is a closed-loop control system, as long as the test torque that code-disc on instrument panel and button input are set, then will start and by speed reduction unit 2, reducer stent 3 and regulate support 5 and make 4 work of gear loader as the stepper motor 1 of servomotor, its fast automatic loading, when closing on the test torque value of setting, then become stepping search at a slow speed, till reaching setting value.

Fig. 2 is the structural representation of gear charger, when doing experiment, because the wearing and tearing of chain or the test torque value that random fluctuation caused of system change, depart from original definite value, this moment, stepper motor was worked immediately, by 16 rotations of loader screw mandrel and drive shift fork 10, force and load cover 12 slip to the left or to the right, cause the increase of chain pilled-in selvedge tension force or reduce, adjust the setting torque value that has changed, make it reach the value of former setting rapidly, load cover 14 and down shift fork 10 is produced axial load in working order, so select thrust bearing 11 for use in the both sides of shift fork 10, loading cover 14 slides to the left or to the right and satisfies altered moment of torsion and realize former setting value.This is because to be in which kind of position by the chain edge slack of testing table relevant in its both sides with the rotation direction of spiral gear 12 and the master and slave moving axis of testing table, when spiral gear is dextrorotation, the chain of master and slave moving axis both sides testing table, when the top of left side chain is pilled-in selvedge (promptly following is the slack list), loading cover slides left and will make the top (being pilled-in selvedge) because of the left side chain that extend due to wearing and tearing or other factors begin to strain, the chain tension that reduces is increased, and the torque value that has so descended rises gradually and reaches the value of former setting rapidly.That is to say that the top of left side chain still is a pilled-in selvedge, the top of right side chain still is the slack list, the invariant position of the chain edge slack in the closed loop originally.When the chain top of left side test has relaxation to take place, the gear loader is subjected to Stepping Motor Control and slides left automatically by other mechanisms, adjust altered torque value, till demonstrating the value of former setting on the code-disc at instrument panel, if in like manner torque value is greater than the value of setting, then load to the right and slide, reducing chain pilled-in selvedge tension force, thereby keep the torque value set.

Gear charger of the present utility model is compared with existing technology, possesses to load to stablize, and is easy to realize automatic control Function, also realized simultaneously simple in structure, compact, volume is little, noise is low, cost is low, handiness, can be widely used in the seal force streaming testing stand of various uses, this device has been successfully used to the roller chain wearing and tearing of chain industry at present, on fatigue and the reliability test bench.

Description of drawings:

Fig. 1 is the auto-loading system sketch of confining force streaming motor blockchain high-speed test (HST) platform driven shaft parts.

Among the figure: 1 stepper motor, 2 synchronous speed reduction units, 3 reducer stents, 4 gear chargers, stepper motor 1 link to each other with synchronous speed reduction unit 2, and by reducer stent 3 with regulate support 5 and link to each other, gear charger 4 passes through loader screw mandrel 6 and links to each other with speed reduction unit 2 and stepper motor 1.

Fig. 2 is a gear charger structure diagram.

Among the figure: 7,7 ' be semiaxis, 8,8 ' key, 9 packing rings, 10 shift forks, 11,11 ' thrust bearing, 12 spiral gears, 13,13 ' ring washer, 14 load cover, 15,15 ' nut, 16 spur gears, two semiaxis 7,7 ' by two keys 8,8 ' and ring washer 13,13 ' respectively are connected and fixed with spur gear 16 and spiral gear 12, helical teeth and interior straight-tooth in the two ends endoporus that loads cover 12 is respectively, and correspondingly be meshed with spiral gear 12 and spur gear 16, load cover 12 in working order down to shift fork 10 generation axial loads, so on the both ends of the surface of shift fork 10, set up thrust bearing 11,11 ', by packing ring 9, nut 15 is fastened on it and loads on the cover 14.

Fig. 3 is the structural drawing of shift fork 10, and an end is that seam is worn at two ends, other end Da Yuan hole, hole, internal thread garden.

Claims (2)

1, a kind of mechanical type moment of resistance gear charger, mainly comprise stepper motor, synchronous speed reduction unit, reducer stent and loader screw mandrel, shift fork and gear charger, it is characterized in that: gear charger 4 is by following part connection procedure in addition, the endoporus two ends that load cover 14 are interior helical teeth and interior straight-tooth, its endoporus is corresponding to be meshed with spiral gear 12 and spur gear 16, semiaxis 7,7 ' an end in spiral gear 12 and spur gear 16 by key 8,8 ' and ring washer 13,13 ' be attached thereto fixing, in the outer rim that loads cover 14 shift fork 10 is installed, and thrust bearing 11 is installed simultaneously in the both sides of shift fork 10,11 ', by packing ring 9, and nut 15 is fastened on the loading cover 14, be connected by shift fork 10 and loader screw mandrel 6 between gear charger 4 and stepper motor 1 and the synchronous speed reduction unit 2, shift fork 10 is threaded with loader screw mandrel 6, by regulating support 5, reducer stent 3 is fixing.

2, a kind of mechanical type moment of resistance gear charger according to claim 1, it is characterized in that: described shift fork 10 1 ends are threaded hole, and the both ends of the surface in other end Da Yuan hole have seam.

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