CN202402518U - Unidirectional clutch and engine equipped with same - Google Patents

Abstract

The utility model relates to a unidirectional clutch and an engine equipped with the unidirectional clutch. The unidirectional clutch comprises a retainer, a driving piece, a coupling frame and a ring-shaped prestress member, wherein at least one storage bag is concavely arranged on the circumference of the retainer; the driving piece is correspondingly and movably arranged in the storage bag; the coupling frame surrounds the outer side of the retainer; and the ring-shaped prestress member is arranged between the retainer and the coupling frame. The storage bag comprises a relatively narrow part and a relatively wide part; when the driving piece is moved to the relatively narrow part due to the resistance to the prestress of the ring-shaped prestress member, the driving piece is propped against the coupling frame; and when the driving piece is moved to the relatively wide part under the prestress of the ring-shaped prestress member, the driving piece is separated from the coupling frame. Therefore, the effect of unidirectional clutch is taken. The utility model is applicable to an engine startup system, and in case that a crank shaft reverses in flameout, a starting motor is not driven in the reverse direction, so that the engine abnormal sound and the part damage are avoided.

Description

Overrunning clutch and be equipped with the engine of this overrunning clutch

Technical field

The utility model relates to a kind of die clutch construction, refers to a kind of engine that can be applicable to the overrunning clutch of locomotive start-up system or transmission system and be equipped with this kind overrunning clutch especially.

Background technique

In the general vehicle, can in vehicle, be provided with an overrunning clutch according to the structural design mode.Consult Fig. 1 and Fig. 2, be respectively sectional drawing, and the overrunning clutch exploded view of engine start system.For the engine start system 9 of general vehicle, it mainly includes a starting motor 91, a starter receiver 92, an overrunning clutch 93, a bent axle 94 and a train of reduction gears.Overrunning clutch 93 is locked by a clutch body 931 and a clutch enclosing cover 932 each other to be formed.

Overrunning clutch 93 is located on the bent axle 94 and can drives bent axle 94 rotations.Starter receiver 92 axially is inserted on bent axle 94, and optionally is resisted against overrunning clutch 93 to drive its rotation.Train of reduction gears includes a gearwheel 96, and the small gear 97 of coaxial setting, and gearwheel 96 all rotates on same gear shaft 98 with small gear 97 synchronously.Gearwheel 96 and starting motor 91 engagements, small gear 97 and starter receiver 92 engagements, the gearwheel 96 shown in the figure is an integral piece with small gear 97.

When starting motor 91 starts and after beginning rotation, see through train of reduction gears, and starter receiver 92 be communicated to overrunning clutch 93.If starting motor 91 sees through train of reduction gears and drives starter receiver 92 rotations; And when the rotating speed of starter receiver 92 is higher with respect to the rotating speed of overrunning clutch 93; Driving block 95 can withstand overrunning clutch 93 and starter receiver 92 simultaneously, so overrunning clutch 93 produces rotation, drives bent axle 94 rotations.If starting motor 91 sees through train of reduction gears and drives starter receiver 92 rotations; And when the rotating speed of starter receiver 92 is low with respect to the rotating speed of overrunning clutch 93; Driving block 95 can't withstand overrunning clutch 93 and starter receiver 92, can not drive bent axle 94 rotations relatively.The visible TaiWan, China patent announcement I269837 of related known techniques, I296317.

When engine when user mode is flame-out because bent axle 94 receives the rotatory inertia effect to be rotated further some revolutions, can meet with many impedances in the process and eventually to stopping.Wherein main impedance is the pressure in the compression stroke, even often causes bent axle 94 counter-rotatings.Can know that by above-mentioned known structure the counter-rotating of bent axle 94 can see through overrunning clutch 93, starter receiver 92 and train of reduction gears, finally drives starting motor 91 and reverses together, so can cause the different sound of engine.

In addition, undesired flame-out if engine meets with in the running, because this moment, bent axle 94 rotating speeds were higher, above-mentioned counter-rotating situation more can cause start-up system greatly to impact strength when taking place, and often causes accessory loss, for example the impact failure of overrunning clutch 93.

The model utility content

The utility model main purpose also is applied to overrunning clutch the start-up system or the transmission system of vehicle except a kind of overrunning clutch of new-type structure is provided.In the application of vehicle launch system, can avoid the accessory loss that causes because of the bent axle counter-rotating.Another purpose of the utility model provides a kind of engine that has been equipped with above-mentioned new-type structure overrunning clutch.

For reaching above-mentioned purpose, the overrunning clutch of the utility model comprises a retainer, at least one actuator, a coupling frame and annular power member in advance.Above-mentioned retainer is concaved with at least one collecting bag in periphery, and each collecting bag includes one wide relatively and a narrow relatively portion.The corresponding activity of above-mentioned actuator is located in the collecting bag.

The coupling frame is surrounded on the outside of retainer, and the preparatory power member of annular is to be located between retainer and the coupling frame.Annular power member is in advance replaced aforementioned actuator thereby is bestowed a radially preparatory power, impels actuator toward moving relative to wide.

When actuator moves to narrow relatively, be resisted against the coupling frame; When actuator moves to wide relatively, separate with the coupling frame.

According to aforementioned, another state of the utility model is a kind of engine that is equipped with above-mentioned overrunning clutch, comprises a starting motor, a train of reduction gears, a starter receiver, a bent axle and a flange.Starting motor includes an axle center gear, and train of reduction gears comprises a gearwheel and a small gear, and wherein gearwheel is engaged in the axle center gear of starting motor, and pinion is in starter receiver.

Starter receiver is fixed in the retainer of overrunning clutch, and flange is fixed in the coupling frame of overrunning clutch, and is fixed in bent axle and rotation synchronously.

When retainer turns to more than the specific rotation speeds, and actuator opposing annular in advance the power member preparatory power and when moving to narrow relatively, retainer is resisted against the coupling frame; When retainer below specific rotation speeds, and actuator receives the in advance preparatory power of power member and when moving to wide relatively, retainer separates with the coupling frame of annular.

The preparatory power member of above-mentioned annular can be an annular spring.Above-mentioned actuator can be a roller.

Roller can be concaved with a location groove in periphery, and annular in advance the power member be embedded in positioning groove, to avoid axially displaced to breaking away from.

Above-mentioned coupling frame can be fixed in an end face of flange.Said flange can be independent bulk-breaking with the coupling frame, and locks combination through at least one bolt; Perhaps, flange can be one-body molded person with the coupling frame.Flange can axially provide at least one oilhole.

The utility model has the advantages that when the overrunning clutch of the utility model is applied in the start-up system of vehicle, can the coupling frame be fixed on bent axle and rotation synchronously, retainer then receives the rotational power of starting motor.Because centrifugal force and inertial force effect, starting motor so not only capable of using drives bent axle smoothly just to be changeed, in case speed of crankshaft surpasses the retainer rotating speed, the power of the two links just interruption, has given play to the effect of one-way clutch, can not damage starting motor.And when bent axle reverse because of cutting the engine in addition engine undesired when flame-out, retainer stops, still keeping not the state of coupling mutually with the coupling frame because of starting motor, and the situation of component can not take place oppositely to drive, and has avoided different sound of engine and accessory loss.

Description of drawings

Fig. 1 is the sectional drawing of known engine start-up system.

Fig. 2 is the overrunning clutch exploded view of Fig. 1.

Fig. 3 is the overrunning clutch exploded view of the utility model first preferred embodiment.

Fig. 4 is the retainer and coupling frame assembling schematic representation of Fig. 3.

Fig. 5 is the railroad traction and the transmission system sectional view of the utility model first preferred embodiment.

Fig. 6 is the engine phantom that is different from Fig. 5 observation visual angle.

Fig. 7 is the planimetric map of the clutch of first preferred embodiment in non-coupled state.

Fig. 8 is the planimetric map of the clutch of first preferred embodiment in couple state.

Fig. 9 is the coupling frame and the one-body molded design diagram of cam of second preferred embodiment.

Description of reference numerals:

Engine start system 9 starting motors 91

Starter receiver 92 overrunning clutchs 93

Clutch body 931 clutch enclosing covers 932

Bent axle 94 driving blocks 95

Gearwheel 96 small gears 97

Gear shaft 98 retainers 11

Clutch 10 collecting bags 12

Narrow relatively 122 of hollow hole 111

Wide relatively 121 axial end 130a, 130b

Actuator 13 annulars are power member 14 in advance

Positioning groove 131 starter receivers 16

Coupling frame 15,50 first end faces 171

Flange 17,51 oilholes 173

Second end face, 172 oil pump actuation gears 18

Belled part 174 starting motors 30

Bolt 19 train of reduction gears 31

Axle center gear 301 gearwheels 312

Gear shaft 311 cylinder heads 41

Small gear 313 crankcases 43

Cylinder block 42 bent axles 45

Piston rod group 44 oil pump driven gears 461

Oil pump 46 gears 48

Gearbox 47 nuts 52

Bearing 49

Embodiment

Fig. 3 to Fig. 6, the overrunning clutch exploded view, the retainer that are respectively first preferred embodiment are assembled the railroad traction and the transmission system sectional view at schematic representation, two different visual angles with the coupling frame.Present embodiment is that overrunning clutch is installed in the locomotive, and the power of a locomotive and transmission system shown in the figure comprise in regular turn the cylinder head 41, a cylinder block 42 and the crankcase 43 that combine, and crankcase 43 other also groups are provided with a gearbox 47.

Cylinder block 42 contents are provided with a piston rod group 44, and crankcase 43 contents are provided with a bent axle 45, and gearbox 47 contents are provided with a gear 48.By combustion explosion piston rod group 44 is produced and move back and forth, and then drive bent axle 45 rotations, bent axle 45 is again with transmission of power to gear 48.

The clutch 10 that is used for engine start includes a retainer 11, several actuators 13, an annular power members 14 and coupling frames 15 in advance.In the present embodiment, retainer 11 is a colyliform, and relatively fixing with a starter receiver 16 end faces, retainer 11 axially is concaved with a hollow hole 111, and periphery then is concaved with several collecting bags 12.Collecting bag 12 includes one wide relatively 121 and one narrow relatively 122.

Actuator 13 is the roller-type actuator, and correspondence is placed in aforementioned several collecting bags 12.Annular in advance power member 14 for example an annular spring snare and several actuators 13 are bestowed a power in advance radially in retainer 11 peripheries, impel actuator 13 tendencies toward moving relative to wide 121.Each roller between the 130b, promptly also is being concaved with a location groove 131 outer shroud week at two axial end face 130a of opposition side in this example, and the preparatory power member 14 of annular is embedded in above-mentioned positioning groove 131 especially and loses the effect to actuator 13 to avoid breaking away from.

Coupling frame 15 is an annular solid, sees through first end face 171 that several bolts 19 are locked in a flange 17.Coupling frame 15 axial corresponding retainer 11, and be surrounded on retainer 11 outsides, that is the inner ring surface of coupling frame 15 is towards retainer 11 peripheries and several actuators 13.

Second end face, 172 coaxial affixed oil pump actuation gears 18 of flange 17, this oil pump actuation gear 18 are engaged in the oil pump driven gear 461 of an oil pump 46 in the crankcase 43.Flange 17 has the belled part 174 of a sleeve shape, extends into emptying aperture 111 among the retainer 11, and is folded with a bearing 49 between the inner ring surface of belled part 174 and retainer 11 (being the wall of hollow hole 111).

Flange 17 has also axially provided a plurality of oilholes 173, can provide an oil circuit directly to lead to bearing 49, retainer 11 and actuator 13.

The means that make up with key/keyway the belled part 174 of flange 17 are assembled in bent axle 45 and lock with nut 52, so coupling frame 15 can rotate with bent axle 45 synchronously.And retainer 11 can freely rotate with respect to coupling frame 15 and bent axle 45 because of bearing 49.

Also be installed with a train of reduction gears 31 in the crankcase 43, train of reduction gears 31 comprises a gear shaft 311, a gearwheel 312 and a small gear 313.Gearwheel 312 and small gear 313 coaxial being sheathed on the gear shaft 311, gearwheel 312 is engaged in the axle center gear 301 of a starting motor 30, and 313 of small gears are engaged in starter receiver 16.In this example, gearwheel 312 is one-body molded members with small gear 313.

When locomotive during at starting state not, retainer 11 is neither moving with coupling frame 15, and actuator 13 then is positioned at wide relatively 121 because of the strength of forcing of the preparatory power member 14 of annular, and is as shown in Figure 7.

When starting motor 30 entrys into service of locomotive, see through train of reduction gears 31 in regular turn and rotating power is delivered to retainer 11 with starter receiver 16.This moment retainer 11 several actuators 13 because of centrifugal force and inertial force effect begin to resist annular in advance power member 14 radially bring strength together, gradually from relative to wide 121 towards moving relative to narrow 122.When rotational velocity reaches a special value, actuator 13 just carries out the transition to narrow relatively 122 from wide relatively 121, as shown in Figure 8 (counterclockwise arrow is represented positive veer among the figure, even also vehicle is able to the member sense of rotation that moves ahead).Because the position is to contact simultaneously to replace retainer 11 and coupling frame 15 at narrow relatively 122 actuator 13, rotates together so coupling frame 15 begins to follow retainer 11.In case coupling frame 15 rotates, and also means the accompanying rotation of flange 17 and bent axle 45, so start the running of engine.

When running well behind the engine start, bent axle 45 rotating speeds exceed retainer 11, and actuator 13 will break away from the coupled relation with coupling frame 15, and motor-end and crankshaft end are independent of each other.When starting motor 30 stops, actuator 13 lose centrifugal force and inertial force effect and by annular in advance power member 14 compel back wide relatively 121, retainer 11 and actuator 13 finally are state of rest.

Flame-out when engine from turning round down, and when bent axle 45 reversal phenomenons take place, because actuator 13 still is state of rest in wide relatively 121 of retainer 11, the situation of interlock train of reduction gears 31 or motor 30 can not take place.

From the above; The overrunning clutch of the utility model is applied in Vehicular system one protection mechanism can be provided; Promptly, bent axle can oppositely not drive the start-up system related components when reversing; Therefore eliminate the possibility that member damages, solved the different mail topic of engine, can bring into play the effect that makes the normal operation of vehicle simultaneously again.

Fig. 9 is second embodiment's coupling frame and flange schematic representation.Present embodiment stresses that mainly coupling frame 50 is to produce with one-body molded mode with flange 51, saves assembling labor and time.

Claims (9)

1. overrunning clutch is characterized in that comprising:

One retainer, its periphery is concaved with at least one collecting bag, and this collecting bag includes one wide relatively and a narrow relatively portion;

At least one actuator, correspondence are movably set in this collecting bag;

One coupling frame is surrounded on the outside of this retainer;

And the preparatory power member of an annular, be located between this retainer and this coupling frame, and replace this actuator thereby bestow a radially preparatory power, impel this actuator to move relative to wide toward this;

Wherein,, this actuator is resisted against this coupling frame when moving to this narrow relatively; , separates this actuator when moving to this wide relatively with this coupling frame.

2. overrunning clutch according to claim 1 is characterized in that, annular power member in advance is an annular spring.

3. overrunning clutch according to claim 1 is characterized in that, this actuator is a roller.

4. overrunning clutch according to claim 3 is characterized in that, is concaved with a location groove outside this roller week, and the preparatory power member of this annular is embedded in this positioning groove.

5. one kind is equipped with the engine according to the said overrunning clutch of claim 1, it is characterized in that comprising:

One starting motor comprises an axle center gear;

One train of reduction gears comprises a gearwheel and a small gear, and this gearwheel is engaged in this axle center gear;

One starter receiver, this starter receiver meshes this small gear, and is fixed in the retainer of this overrunning clutch;

One bent axle;

And a flange, it is fixed in this coupling frame, and is fixed in this bent axle and rotates synchronously;

Wherein, when this retainer turns to more than the specific rotation speeds, and the preparatory power of the preparatory power member of this actuator this annular of opposing and when moving to this narrow relatively, this retainer is resisted against this coupling frame; When this retainer below specific rotation speeds, and this actuator is when moving to this wide relatively, this retainer separates with this coupling frame.

6. engine according to claim 5 is characterized in that, this flanged shaft is to having provided at least one oilhole.

7. engine according to claim 5 is characterized in that, this coupling frame is fixed in an end face of this flange.

8. engine according to claim 5 is characterized in that, this flange is to lock through at least one bolt to combine with this coupling frame.

9. engine according to claim 5 is characterized in that, this flange and this coupling frame are one-body molded.

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