CN205605949U - Locking formula axle head gear closed structure - Google Patents

Abstract

The utility model discloses a locking formula axle head gear closed structure, including box, worm axle, worm shaft gear, motor shaft, motor gear, shrouding b and awl end holding screw b, shrouding b compresses tightly the worm shaft gear, awl end holding screw b passes through screw -thread fit and installs in shrouding b to the screw in is in the keyway of worm axle and worm shaft gear. The superiority: the utility model discloses a screw fastening shaft holds closed structure, on the basis of not changing other parts of product, only changes reduce cost and the risk of using new part to the shrouding. Having increased a screw hole on the shrouding, being used for cooperating awl end holding screw b's use, awl end holding screw b has played the effect that circumference was fixed to the shrouding, and at worm axle gear revolve's in -process, the shrouding also along with its rotation, makes it not produce relative motion, and the shrouding just is difficult to not hard up droing like this, has reduced the probability of renewal part.

Description

Anti-loosing type shaft end gear closing plate structure

(1) technical field:

This utility model belongs to electric device for valve technical field, particularly a kind of anti-loosing type axle head Gear closing plate structure.

(2) background technology:

At present, electric device for valve be a kind of with valve with the use of, control valve opening and pass The electromechanical integration industrial equipment closed.Electric device for valve is divided into Non-follow control and Electronic control two Plant control mode.Electronic control is the major control mode of electric device for valve.Electronic control is Being completed by electric control mechanism, the main portion external member comprised is: main box, motor section set, Electronic worm screw portion is overlapped.Electronic worm shaft gear in the most electronic worm screw portion set and motor gear phase Engagement, introduces the output power of motor, by required during certain speed reducing ratio acquisition electric valve Power, i.e. the output torque of electric device for valve and rotating speed.Because of electronic worm shaft gear and electricity Machine gear is connected, and rotating speed is very fast, therefore needs shrouding to be fixed on electronic worm shaft, to ensure The normal steadily output of power.

Anti-loosing type shaft end gear shrouding in known technology is installed and structure is shown in Fig. 1, bearing A 1 outer ring is installed in casing 2 by shaft hole matching and end face cooperation, worm shaft 3 and bearing A 1 inner ring is fitted into by shaft hole matching and the shaft shoulder, and one end of worm shaft 3 is arranged on case In body 2.The outer ring of bearing b 5 and bearing c 6 is coordinated with spacing by shaft hole matching and end face Set 4 cooperation, stop collar 4 outer ring is arranged in casing 2 by shaft hole matching, bearing b 5 He The inner ring of bearing c 6 is coordinated by shaft hole matching and the shaft shoulder and coordinates with worm shaft 3, by worm shaft 3 are fixed in casing 2.Worm shaft gear 8 is installed by shaft hole matching with worm shaft 3, Flat key a 9 carries out end face with the keyway on worm shaft 3 and worm shaft gear 8 and coordinates, and makes worm screw Shaft gear 8 is circumferentially fixed on worm shaft 3, and shrouding a 7-1 is arranged on snail by end face cooperation On the end face of bar shaft gear 8, screw 10 is screwed into worm shaft through spring washer 11 and shrouding a 7-1 In the screwed hole of 3 other ends, shrouding a 7-1 is pressed on worm shaft gear 8, by worm screw Shaft gear 8 is axially fixed on worm shaft 3.Motor gear 14 endoporus is pacified by shaft hole matching Being contained on motor shaft 12, the keyway of motor gear 14 is by flat key b 13 and motor shaft 12 Keyway carry out end face cooperation, motor gear 14 is carried out circumferentially positioned, uses tapered end tightening afterwards Motor gear 14 is axially positioned by screw a 15, is fixed on motor shaft 12.Work as electricity During machine energising, motor shaft 12 rotates, and drive motor gear 14 rotates, motor gear 14 with Worm shaft gear 8 is meshed, and worm shaft gear 8 is fixed on by shrouding a 7-1 and flat key 9 On worm shaft 3, thus worm shaft 3 is driven to rotate, it is achieved the Electronic control of electric device for valve.

But this structure has the disadvantage in that

Shrouding a 7-1 is coordinated by end face and screw 10 fixes worm shaft gear 8, shrouding A 7-1 is less with the contact area of worm shaft gear 8, and frictional force is less.When electrical power, Motor shaft 12 quick rotation, drive motor gear 14 quick rotation, worm shaft gear 8 and electricity Machine gear 14 is meshed, during worm shaft gear 8 quick rotation, owing to frictional force is less, and can Can be not enough to relative with the axial force that worm shaft gear 8 rotates, shrouding a 7-1 can produce The relative motion of fine displacements and abrasion, if things go on like this cause shrouding a 7-1 to loosen, the most de- Fall, accelerate the damage of parts.When this structure is used on adjustment type product, adjustment type product Needing motor frequently to commutate to valve to be controlled, motor frequently commutates, and motor shaft 12 drives Motor gear 14 left-right rotation, the worm shaft gear 8 being meshed with motor gear 14 also wants a left side Turning right dynamic, this measure more accelerates loosening of shrouding a 7-1.

(3) utility model content:

The purpose of this utility model is to provide a kind of anti-loosing type shaft end gear closing plate structure, it Low cost, compact conformation, without relative motion, solve technical problem present in known technology.

The technical solution of the utility model: anti-loosing type shaft end gear closing plate structure, including casing, Worm shaft, worm shaft gear, motor shaft, motor gear, described worm shaft is assemblied in casing, One end of worm shaft band keyway is connected by shaft hole matching is fixing with worm shaft gear, motor gear Being fixed on motor shaft, motor gear is meshed with worm shaft gear；It is characterized in that it also wraps Include shrouding b and tapered end holding screw b；Described shrouding b is arranged on worm shaft by end face cooperation On gear, screw is screwed into the screwed hole of one end of worm shaft band keyway through spring washer and shrouding b In, make shrouding b compress worm shaft gear；Described tapered end holding screw b is pacified by threaded engagement It is contained in shrouding b, and screws in the worm shaft keyway with worm shaft gear.

The other end of worm shaft described above is assembled by axis hole and the shaft shoulder with the inner ring of bearing a, Described bearing a is installed in casing by axis hole and end face cooperation.

Worm shaft described above is coordinated by bearing b and the shaft hole matching of bearing c and the shaft shoulder to be installed In casing.

Anti-loosing type shaft end gear closing plate structure described above also includes stop collar, outside described stop collar Circle be arranged in casing by shaft hole matching, stop collar inner ring by bearing b and bearing c with Worm shaft coordinates.

Worm shaft described above carries out end face by flat key a with the keyway on worm shaft gear and joins Close, make worm shaft gear circumferentially fixed on worm shaft.

Motor gear described above is circumferentially fixed on motor shaft by flat key b, and motor gear leads to Cross tapered end holding screw a to be axially fixed on motor shaft.

This utility model has the advantage that with good effect: this utility model uses screw tight Gu axle head closing plate structure, on the basis of not changing other part of product, only shrouding is changed Dynamic, reduce cost and use the risk of new parts.Shrouding adds a screwed hole, uses Coordinating the use of tapered end holding screw b, shrouding has been risen circumferentially fixed by tapered end holding screw b Effect, worm shaft gear rotate during, shrouding also rotates with it so that it is do not produce Relative motion, such shrouding is just not easy loose or dislocation, decreases the probability of renewal part.

(4) accompanying drawing explanation:

Fig. 1 is known technology structural representation.

Fig. 2 is the structural representation of anti-loosing type shaft end gear closing plate structure involved by this utility model.

Wherein, 1 is bearing a, and 2 is casing, and 3 is worm shaft, and 4 is stop collar, and 5 is axle Holding b, 6 is bearing c, and 7-1 is shrouding a, and 7-2 is shrouding b, and 8 is worm shaft gear, 9 For flat key a, 10 is screw, and 11 is spring washer, and 12 is motor shaft, and 13 is flat key b, 14 For motor gear, 15 is tapered end holding screw a, and 16 is tapered end holding screw b.

(5) detailed description of the invention:

For summary of the invention of the present utility model, feature and effect can be further appreciated that, hereby enumerate with Lower embodiment, and coordinate accompanying drawing Fig. 2 to describe in detail.

Embodiment: anti-loosing type shaft end gear closing plate structure (see Fig. 2), including casing 2, worm screw Axle 3, worm shaft gear 8, motor shaft 12, motor gear 14, described worm shaft 3 is assemblied in In casing 2, one end of worm shaft 3 band keyway is fixed by shaft hole matching with worm shaft gear 8 Connecting, motor gear 14 is fixed on motor shaft 12, motor gear 14 and worm shaft gear 8 are meshed；It is characterized in that it also includes shrouding b 7-2 and tapered end holding screw b 16；Institute Stating shrouding b 7-2 to be arranged on worm shaft gear 8 by end face cooperation, screw 10 is through spring washer In the screwed hole of 11 and shrouding b 7-2 one end being screwed into worm shaft 3 band keyway, make shrouding b 7-2 Compress worm shaft gear 8；Described tapered end holding screw b 16 is arranged on shrouding by threaded engagement In b 7-2, and screw in the keyway of worm shaft 3 and worm shaft gear 8.

The other end of worm shaft 3 described above is filled by axis hole and the shaft shoulder with the inner ring of bearing a 1 Joining, described bearing a 1 is installed in casing 2 by axis hole and end face cooperation.

Worm shaft 3 described above is joined by bearing b 5 and the shaft hole matching of bearing c 6 and the shaft shoulder Conjunction is arranged in casing 2.

Anti-loosing type shaft end gear closing plate structure described above also includes stop collar 4, described stop collar 4 outer rings are arranged in casing 2 by shaft hole matching, and stop collar 4 inner ring passes through bearing b 5 He Bearing c 6 coordinates with worm shaft 3.

Worm shaft 3 described above is held with the keyway on worm shaft gear 8 by flat key a 9 Face coordinates, and makes worm shaft gear 8 circumferentially fixed on worm shaft 3.

Motor gear 14 described above is circumferentially fixed on motor shaft 12 by flat key b 13, Motor gear 14 is axially fixed on motor shaft 12 by tapered end holding screw a 15.

Claims (6)

1. anti-loosing type shaft end gear closing plate structure, including casing, worm shaft, worm shaft gear, Motor shaft, motor gear, described worm shaft is assemblied in casing, one end of worm shaft band keyway Being connected by shaft hole matching is fixing with worm shaft gear, motor gear is fixed on motor shaft, electricity Machine gear is meshed with worm shaft gear；It is characterized in that it also includes shrouding b and tapered end tightening Screw b；Described shrouding b is arranged on worm shaft gear by end face cooperation, and screw passes bullet In the screwed hole of one end that pad and shrouding b are screwed into worm shaft band keyway, shrouding b is made to compress worm screw Shaft gear；Described tapered end holding screw b is arranged in shrouding b by threaded engagement, and screws in In the worm shaft keyway with worm shaft gear.

Anti-loosing type shaft end gear closing plate structure the most according to claim 1, it is characterised in that The other end of described worm shaft is assembled by axis hole and the shaft shoulder with the inner ring of bearing a, described bearing A is installed in casing by axis hole and end face cooperation.

Anti-loosing type shaft end gear closing plate structure the most according to claim 1, it is characterised in that Described worm shaft is arranged on casing by bearing b and the shaft hole matching of bearing c and shaft shoulder cooperation In.

Anti-loosing type shaft end gear closing plate structure the most according to claim 1, it is characterised in that Described anti-loosing type shaft end gear closing plate structure also includes that stop collar, described stop collar outer ring pass through axle Hole cooperation is arranged in casing, and stop collar inner ring is joined with worm shaft by bearing b and bearing c Close.

Anti-loosing type shaft end gear closing plate structure the most according to claim 1, it is characterised in that Described worm shaft carries out end face by flat key a with the keyway on worm shaft gear and coordinates, and makes worm screw Shaft gear is circumferentially fixed on worm shaft.

Anti-loosing type shaft end gear closing plate structure the most according to claim 1, it is characterised in that Described motor gear is circumferentially fixed on motor shaft by flat key b, and motor gear is tight by tapered end Determine screw a to be axially fixed on motor shaft.