CN208982208U - Electric starter before a kind of crankshaft of 21 grades of methanol engines - Google Patents

Abstract

The utility model discloses electric starters before a kind of crankshaft of 21 grades of methanol engines, wedge overrunning clutch is supportted including monocline, freewheel clutch inner ring drives turbine, long footstalk driving gear, engine crankshaft, cone locking axle sleeve, starting motor with worm screw, deep groove ball bearing, long footstalk driving gear is tightened on engine crankshaft right side, monocline support wedge overrunning clutch is fixedly mounted on engine crankshaft, clutch locks taper hole and cone locking axle sleeve cooperates, freewheel clutch inner ring and freewheel clutch inner ring driving turbine non-tooth shaft face one end interference fit, the inner hole of deep groove ball bearing and the freewheel clutch inner ring driving turbine other end is interference fitted, clutch inner ring drives turbine to be interference fitted by deep groove ball bearing and long footstalk driving gear, long footstalk driving gear shaft pommel face drives whirlpool in freewheel clutch inner ring In wheel bore.The utility model advantage: minimizing starting power of motor, weight, optimize compact rack construction, effectively mitigation weight.

Description

Electric starter before a kind of crankshaft of 21 grades of methanol engines

Technical field

The utility model relates to clutch and model engine starter technical fields, more particularly to a kind of 21 grades of methanol Electric starter before the crankshaft of engine.

Background technique

Disclose electric starter before a kind of crankshaft for 21 grades of methanol engines.According to CADC (Chinese international flight The match of device design challenge) 3kg prescribes a time limit, and " power of model only allows not surpass using total working volume for the requirements of load-carrying laws of the game 2.1 Cross the methanol engine (ungeared engine limits 6.5cc, and band retarder engine limits 3.5cc) of settable volume, the sky of model Mounted mass is not more than 3.00kg in dry situation." and " model should be taken off in a manner of sliding run, and the starting of engine must Device must be carried by aircraft voluntarily to complete, there must not be human intervention." use 21 grades of (3.5cc) methanol engines as aircraft Power need to use electric starter.CADC 3kg load-carrying traditional electric starter used of competing of prescribing a time limit is to start indirectly, starting Torque need to be by power decelerator Inverted Output to engine crankshaft.Starting torque is generated by starting motor, by turbine and worm The amplification of deceleration mechanism, is transferred to paddle shaft by unidirectional needle bearing, is transferred to power decelerator by paddle shaft, and another mistake is started to passing to Machine crankshaft.

This scheme has the following problems and disadvantage:

1) indirect transfer of starting torque, mechanical efficiency be not it is optimal, it is difficult to also cause structural loss of weight；

2) big retarding that the Inverted Output of starting torque needs to offset power decelerator diminution starting torque influence compares whirlpool Worm and gear deceleration mechanism；

3) Inverted Output of starting torque needs powerful starting motor, is one of the factor of structural loss of weight difficulty；

4) big retarding rack construction more available than turbine worm reducer structure is not optimal, be structural loss of weight it is difficult because The two of element；

5) it is limited to the maximum allowable revolving speed of 12000 turns of unidirectional needle bearing, the speed of walking around of the 42000 of engine crankshaft will be led Unidirectional needle bearing is caused to fail, traditional scheme can only transmit staring torque with unidirectional needle bearing in paddle shaft；

6) the contact frictional dissipation of unidirectional needle bearing influences the raising of highest paddle speed；

7) problems and disadvantages 1) to 6) being that CADC 3kg load-carrying match of prescribing a time limit is pursued and (mitigates every 1g weight, maximum power effect Rate, maximum power output) limit level target obstacle.

Summary of the invention

In order to solve the above-mentioned technical problem, the utility model electrically activates before providing the crankshafts of 21 grades of methanol engines a kind of Device.

The utility model adopts the following technical solution: electric starter before the crankshaft of 21 grades of methanol engines of one kind, including Monocline supports wedge overrunning clutch, freewheel clutch inner ring drives turbine, long footstalk driving gear, engine crankshaft, taper lock The inner hole thread of mandrel set, starting motor, deep groove ball bearing with worm screw, the long footstalk driving gear shaft handle passes through interior hexagonal Conehead lock screw is tightened on the right side of engine crankshaft, and the long footstalk driving gear and engine crankshaft after locking will not be because Cause to combine timeliness for the vibration of engine operation, monocline supports wedge overrunning clutch and is fixedly mounted on hair by voussoir retainer On motivation crankshaft, voussoir retainer is pressed on outside cone locking axle sleeve, make monocline support wedge overrunning clutch, engine crankshaft, Long footstalk driving gear is combined as a whole, and freewheel clutch inner ring and freewheel clutch inner ring drive turbine non-tooth shaft face one end mistake It is full of cooperation, the inner hole of deep groove ball bearing and the freewheel clutch inner ring driving turbine other end is interference fitted, the driving of clutch inner ring Turbine is interference fitted by deep groove ball bearing and long footstalk driving gear, wherein long footstalk driving gear shaft pommel face surmount from Clutch inner ring drives in turbine bore, and concordant with deep groove ball bearing inner face, and fit flush error is with freewheel clutch inner ring end Face is not contacted with voussoir retainer inner face to be limited, wherein the starting motor with worm screw, freewheel clutch inner ring driving turbine are logical It crosses screw to be fixedly mounted on V-type power decelerator shell, freewheel clutch inner ring drives turbine and the starting motor with worm screw Worm screw engagement.

Preferably, the monocline support wedge overrunning clutch includes freewheel clutch inner ring, single sprag clutch voussoir, wedge Block retainer, voussoir fixed pivot pin, voussoir reset spring, voussoir retainer cover board, voussoir retainer are equipped with 6, and each wedge It is equidistantly embedded in 1 voussoir fixed pivot pin on block retainer, 1 single sprag clutch wedge is equipped between every 2 voussoir retainers Block, and be set in voussoir fixed pivot pin, the single sprag clutch voussoir in upper end one is equipped with voussoir longitudinal grooved, the voussoir Voussoir reset spring is installed, voussoir reset spring is coaxial with voussoir fixed pivot pin, voussoir retainer cover board peace in longitudinal grooved It is fixed mounted in voussoir retainer front and by 3 countersunk head screws, it is freewheel clutch inner ring, concentric with engine crankshaft.

Preferably, the voussoir retainer back side is machined with clutch locking taper hole and the taper with engine crankshaft root Locking axle sleeve cooperation.

Preferably, the inner hole thread of the long footstalk driving gear, which is arranged, has increment in long footstalk driving gear.

Preferably, asymmetrical shape of the single sprag clutch voussoir on the basis of axis hole, single sprag clutch voussoir There are one section and the non-concentric work cambered surface of axis hole, work cambered surface contacts under voussoir action of reset spring with clutch inner ring, monocline Support clutch voussoir can be rotated around voussoir fixed pivot pin, and wedging torque has work cambered surface to contact friction generation with clutch inner ring.

Preferably, the monocline support wedge overrunning clutch is assembled by equidistant 3 apertures and 21 grades of methanol engines.

Preferably, the long footstalk driving gear is engaged with driven gear, and driven gear is equipped with bearing, and paddle shaft is set in On bearing, and fixed by nut.

The utility model has the advantage that: using single wedge overrunning clutch of design invention, realizing and sends out in 21 grades of methanol Starting torque is directly inputted on motivation crankshaft；It avoids by active force retarder Inverted Output starting torque to engine shaft Transmission link；Monocline support wedge overrunning clutch voussoir when surmounting operating condition can be centrifuged disengaging inner ring, no longer generation frictional dissipation, Transmission efficiency is improved, the raising of paddle speed is conducive to；The single wedge overrunning clutch for designing invention works in methanol engine 42000 It will not fail when rev/min revolving speed；The drawbacks of avoiding using unidirectional needle bearing, makes directly in engine crankshaft electrifying startup Scheme is achieved；Enough starting torques are exported with the turbine worm reducer structure of small reduction ratio；Minimum starting power of motor, Weight；Optimize compact rack construction, effectively mitigation weight.

Detailed description of the invention

Fig. 1 is the general structure schematic diagram of electric starter before a kind of crankshaft of 21 grades of methanol engines of the utility model.

Fig. 2 is the electric starter structure chart of electric starter before a kind of crankshaft of 21 grades of methanol engines of the utility model.

Fig. 3 be the monocline support voussoir of electric starter before a kind of crankshaft of 21 grades of methanol engines of the utility model surmount from Clutch structural schematic diagram.

Description of symbols: 1, monocline support wedge overrunning clutch 2, freewheel clutch inner ring drive turbine 3, long footstalk Driving gear 4, engine crankshaft 5, cone locking axle sleeve 6, the starting motor 7 with worm screw, freewheel clutch inner ring 8, list Sprag clutch voussoir 9, voussoir retainer 10, voussoir fixed pivot pin 11, clutch lock taper hole 12, voussoir reset spring 13, voussoir retainer cover board 14, deep groove ball bearing 15, V-type power decelerator shell 16, motor body 17, driven tooth Take turns 18, paddle shaft 19, interior hexagonal conehead lock screw.

Specific embodiment

The preferred embodiment of the utility model is described in detail with reference to the accompanying drawing, so that the advantages of the utility model It can be easier to be readily appreciated by one skilled in the art with feature, to make the protection scope of the utility model apparent clear Define.

Please refer to Fig. 1, Fig. 2, Fig. 3, electric starter before a kind of crankshaft of 21 grades of methanol engines, including monocline support voussoir Freewheel clutch (1), freewheel clutch inner ring drive turbine (2), long footstalk driving gear (3), engine crankshaft (4), taper Locking axle sleeve (5), the starting motor (6) with worm screw, deep groove ball bearing (14), long footstalk driving gear (3) footstalk it is interior Hole is threaded through the right side that interior hexagonal conehead lock screw (19) is tightened on engine crankshaft (4), the long footstalk master after locking Moving gear (3) and engine crankshaft (4) will not cause because of the vibration of engine operation combine timeliness, monocline support voussoir surmount from Clutch (1) is fixedly mounted on engine crankshaft (4) by voussoir retainer (9), and voussoir retainer (9) is pressed on cone locking Axle sleeve (5) outside, makes monocline support wedge overrunning clutch (1), engine crankshaft (4), long footstalk driving gear (3) be combined into one Body, freewheel clutch inner ring (7) and freewheel clutch inner ring driving turbine (2) non-tooth shaft face one end interference fit, deep-groove ball axis The inner hole for holding (14) and freewheel clutch inner ring driving turbine (2) other end is interference fitted, and clutch inner ring drives turbine (2) logical It crosses deep groove ball bearing (14) and long footstalk driving gear (3) is interference fitted, wherein long footstalk driving gear (3) footstalk end face is super It is and concordant with deep groove ball bearing (14) inner face more in clutch inner ring driving turbine (2) hole, fit flush error with surmount from Clutch inner ring (7) end face is not contacted with voussoir retainer (9) inner face to be limited, wherein starting motor (6), overdrive clutch with worm screw Device inner ring driving turbine (2), which is screwed, to be mounted on V-type power decelerator shell (15), and freewheel clutch inner ring drives Dynamic turbine (2) are engaged with the worm screw of the starting motor (6) with worm screw.

Preferably, monocline support wedge overrunning clutch (1) includes freewheel clutch inner ring (7), single sprag clutch Voussoir (8), voussoir retainer (9), voussoir fixed pivot pin (10), voussoir reset spring (12), voussoir retainer cover board (13), wedge Block retainer (9) is equipped with 6, and 1 voussoir fixed pivot pin (10) is equidistantly embedded on each voussoir retainer (9), every 2 wedges It is equipped with 1 single sprag clutch voussoir (8) between block retainer (9), and is set on voussoir fixed pivot pin (10), upper end one Single sprag clutch voussoir (8) is equipped with voussoir longitudinal grooved, is equipped with voussoir reset spring in the voussoir longitudinal grooved (12), voussoir reset spring (12) is coaxial with voussoir fixed pivot pin (10), and voussoir retainer cover board (13) is mounted on voussoir holding It frame (9) front and is fixed by 3 countersunk head screws, it is freewheel clutch inner ring (7), concentric with engine crankshaft (4).

Preferably, voussoir retainer (9) back side be machined with clutch locking taper hole (11) and with engine crankshaft (4) The cone locking axle sleeve (5) of root cooperates.

Preferably, the inner hole thread of the long footstalk driving gear (3), which is arranged, has increment in long footstalk driving gear (3).

Preferably, asymmetrical shape of the single sprag clutch voussoir (8) on the basis of axis hole, single sprag clutch wedge Block (8) has one section and the non-concentric work cambered surface of axis hole, and work cambered surface is voussoir reset spring (12) effect is lower and clutch inner ring (7) it contacts, single sprag clutch voussoir (8) can rotate around voussoir fixed pivot pin (10), and wedging torque has work cambered surface and clutch Device inner ring (7) contact friction generates.

Preferably, monocline support wedge overrunning clutch (1) is filled by equidistant 3 apertures and 21 grades of methanol engines Match.

Preferably, the long footstalk driving gear (3) is engaged with driven gear (17), and driven gear (17) is equipped with axis It holds, paddle shaft (18) is set on bearing, and is fixed by nut.

The utility model is realized in this way: clutch inner ring drives turbine (2) and long footstalk driving gear (3) through zanjon Ball bearing (14) combines, and to be combined into one after voussoir retainer (9), long footstalk driving gear (3), engine crankshaft (4) assembly A entirety, combination are that the internal screw thread of long footstalk driving gear (3) and the external screw thread of engine crankshaft (4) root screw, rotation The end face of tight duration footstalk driving gear (3), which presses on voussoir retainer (9), makes clutch locking taper hole (11) and taper lock Mandrel set (5) is tightly locked, and the starting worm screw on motor shaft drives clutch inner ring driving turbine (2) inverse under the driving of starting motor Hour hands rotation generates friction, friction when freewheel clutch inner ring (7) and single sprag clutch voussoir (8) generation relative displacement Power makes freewheel clutch inner ring (7) and single sprag clutch voussoir (8) rub wedging under non-concentric arc mechanism, after wedging Torque is passed to voussoir retainer (9) by voussoir fixed pivot pin (10), and voussoir retainer (9) drives engine crankshaft when rotating (4) it rotates, engine start when starting motor speed is enough.

Crankshaft high-speed rotates after engine start, when voussoir retainer (9) revolving speed is higher than clutch inner ring driving turbine (2) Revolving speed when wedging release monocline support wedge overrunning clutch (1) and be in and surmount operating condition, single sprag clutch voussoir (8) is being centrifuged By inverse wedging torque under the action of power, it is greater than voussoir reset spring when voussoir retainer (9) revolving speed is increased to inverse wedging torque (12) single sprag clutch voussoir (8) completely disengages with freewheel clutch inner ring (7) after clamping torque, and engine start is simultaneously normal After work, electric starter stops working, and clutch inner ring drives turbine (2) static, and long footstalk driving gear (3) is in deep-groove ball axis Rotation in (14) is held, since the allowable rotating speed of deep groove ball bearing (14) is 45000 revs/min, engine operation is at 42000 revs/min When not will lead to deep groove ball bearing (14) failure, after single sprag clutch voussoir (8) and freewheel clutch inner ring (7) disengage Friction is not generated, and deep groove ball bearing (8) friction is less than unidirectional needle bearing friction, and synthesis result is the mill that the utility model generates Consumption of wearing (fever) is less than the friction loss (fever) of traditional 21 grades of methanol engine electric starters.

Not limited to this, any change or replacement expected without creative work should all be covered in the utility model Protection scope within.Therefore, the protection scope of the utility model should be determined by the scope of protection defined in the claims.

Claims (7)

1. electric starter before a kind of crankshaft of 21 grades of methanol engines, which is characterized in that support voussoir overdrive clutch including monocline Device (1), freewheel clutch inner ring drive turbine (2), long footstalk driving gear (3), engine crankshaft (4), cone locking axle sleeve (5), the inner hole thread of the starting motor (6) with worm screw, deep groove ball bearing (14), long footstalk driving gear (3) footstalk is logical The right side that interior hexagonal conehead lock screw (19) is tightened on engine crankshaft (4) is crossed, it is logical that monocline supports wedge overrunning clutch (1) It crosses voussoir retainer (9) to be fixedly mounted on engine crankshaft (4), voussoir retainer (9) is pressed on cone locking axle sleeve (5) Outside, monocline support wedge overrunning clutch (1), engine crankshaft (4), long footstalk driving gear (3) is made to be combined as a whole, surmount from Clutch inner ring (7) and freewheel clutch inner ring driving turbine (2) non-tooth shaft face one end interference fit, deep groove ball bearing (14) and super More the inner hole interference fit of clutch inner ring driving turbine (2) other end, clutch inner ring drive turbine (2) to pass through deep-groove ball axis It holds (14) and long footstalk driving gear (3) is interference fitted, wherein long footstalk driving gear (3) footstalk end face is in freewheel clutch It is and concordant with deep groove ball bearing (14) inner face in circle driving turbine (2) hole, wherein the starting motor (6) with worm screw, surmount from Clutch inner ring driving turbine (2), which is screwed, to be mounted on V-type power decelerator shell (15), freewheel clutch inner ring Driving turbine (2) is engaged with the worm screw of the starting motor (6) with worm screw.

2. electric starter before the crankshaft of 21 grades of methanol engines according to claim 1, which is characterized in that the monocline Support wedge overrunning clutch (1) includes freewheel clutch inner ring (7), single sprag clutch voussoir (8), voussoir retainer (9), wedge Block fixed pivot pin (10), voussoir reset spring (12), voussoir retainer cover board (13), voussoir retainer (9) are equipped with 6, and every It is equidistantly embedded in 1 voussoir fixed pivot pin (10) on a voussoir retainer (9), is equipped with 1 between every 2 voussoir retainers (9) Single sprag clutch voussoir (8), and be set on voussoir fixed pivot pin (10), on the single sprag clutch voussoir (8) in upper end one Equipped with voussoir longitudinal grooved, be equipped in the voussoir longitudinal grooved voussoir reset spring (12), voussoir reset spring (12) with Voussoir fixed pivot pin (10) is coaxial, and voussoir retainer cover board (13) is mounted on voussoir retainer (9) front and by 3 countersunk head screws It is fixed, it is freewheel clutch inner ring (7), concentric with engine crankshaft (4).

3. electric starter before the crankshaft of 21 grades of methanol engines according to claim 2, which is characterized in that the voussoir Retainer (9) back side is machined with clutch locking taper hole (11) and matches with the cone locking axle sleeve (5) of engine crankshaft (4) root It closes.

4. electric starter before the crankshaft of 21 grades of methanol engines according to claim 2, which is characterized in that the long axis The inner hole thread of handle driving gear (3), which is arranged, has increment in long footstalk driving gear (3).

5. electric starter before the crankshaft of 21 grades of methanol engines according to claim 1, which is characterized in that the monocline Support clutch voussoir (8) asymmetrical shape on the basis of axis hole, single sprag clutch voussoir (8) have one section it is non-concentric with axis hole Work cambered surface.

6. electric starter before the crankshaft of 21 grades of methanol engines according to claim 1, which is characterized in that the monocline Wedge overrunning clutch (1) is supportted to assemble by equidistant 3 apertures and 21 grades of methanol engines.

7. electric starter before the crankshaft of 21 grades of methanol engines according to claim 1, which is characterized in that the long axis Handle driving gear (3) is engaged with driven gear (17), and driven gear (17) is equipped with bearing, and paddle shaft (18) is set on bearing, And it is fixed by nut.