WO2014198086A1 - 单向耦合减震皮带轮 - Google Patents

单向耦合减震皮带轮 Download PDF

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Publication number
WO2014198086A1
WO2014198086A1 PCT/CN2013/082085 CN2013082085W WO2014198086A1 WO 2014198086 A1 WO2014198086 A1 WO 2014198086A1 CN 2013082085 W CN2013082085 W CN 2013082085W WO 2014198086 A1 WO2014198086 A1 WO 2014198086A1
Authority
WO
WIPO (PCT)
Prior art keywords
friction
ring
spring
pulley
threaded mandrel
Prior art date
Application number
PCT/CN2013/082085
Other languages
English (en)
French (fr)
Inventor
李志敏
Original Assignee
Li Zhimin
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201310236346.7A external-priority patent/CN103352973B/zh
Priority claimed from CN201310299286.3A external-priority patent/CN103363064B/zh
Application filed by Li Zhimin filed Critical Li Zhimin
Priority to US14/413,440 priority Critical patent/US9611928B2/en
Publication of WO2014198086A1 publication Critical patent/WO2014198086A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/36—Pulleys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
    • F16D3/12—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted for accumulation of energy to absorb shocks or vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/20—Freewheels or freewheel clutches with expandable or contractable clamping ring or band
    • F16D41/206—Freewheels or freewheel clutches with expandable or contractable clamping ring or band having axially adjacent coils, e.g. helical wrap-springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/36—Pulleys
    • F16H2055/366—Pulleys with means providing resilience or vibration damping

Definitions

  • the invention belongs to the technical field of manufacturing a unidirectional coupling damper pulley for an automobile generator, and particularly relates to a unidirectional coupling damper mechanism which is frictionally braked by a spring, and specifically relates to a unidirectional coupling damper pulley of a spring friction brake.
  • Automotive generator one-way clutch pulleys have been widely used in some high-end cars in the world.
  • the generator When the generator is driven by the crankshaft of an automobile engine such as a belt or a pulley unit, excessive rotation may occur on the pulley, the shaft and the pulley due to the cycle of the intake stroke, the compression stroke, the combustion and the expansion stroke, and the exhaust stroke.
  • Moment (torque) and tension In the tendency of the crankshaft's rotation to drop instantaneously, the generator shaft has a large amount of inertia, and the belt is pulled in the direction of torque generation and changes in tension, which may cause the belt to overload and reduce the life of the belt.
  • One end of the friction spring is fixed on the retainer, which presses the head of the friction spring into a straight line, and the straight line and the ring shape form a corner point, and the friction force is Concentrated on this corner point, when the generator rotates at high and low speeds to generate friction clutch, the corner of the friction spring fixed to the cage is easily broken.
  • the friction spring corner point and the outer circle surface are all used for the friction and stop of the inner diameter of the pulley hub, which not only has a low service life, but also has a complicated manufacturing process and high cost. Summary of the invention
  • the invention discloses a one-way coupling damping pulley with spring friction braking, which solves the technical problem of the above-mentioned one-way clutch pulley.
  • a one-way coupling damper pulley for spring friction braking including a threaded mandrel, a damper spring, a friction spring, a friction stop ring, a friction sliding ring, a shock absorbing washer, Ball bearing, positioning sleeve, belt hub, threaded mandrel extend into the belt hub, and both ends are equipped with a ball bearing, the inner wall of the belt hub is pressed into the friction stop ring and the positioning sleeve, and the outer diameter of the threaded mandrel forms a convex a ring, the step of the convex ring facing the opposite side further has a step; the threaded mandrel of the opposite side of the convex ring has a shock absorbing washer, and the damping washer forms a step; the threaded mandrel casing shock absorbing spring, minus The first head of the shock spring is placed on the convex ring of
  • one side of the convex ring top shock absorbing spring of the threaded mandrel is a helicoid.
  • one side of the shock absorbing washer top shock absorbing spring is a spiral surface.
  • the threaded mandrel forms a ring of concave card slots; the threaded mandrel is sheathed, the washer is on the outer side of the shock absorbing washer and the friction sliding ring, and the outer side of the washer is fitted with a square circlip, the square circlip inner diameter card A concave card slot that is tighter than the threaded mandrel.
  • the outer diameter of the damper washer and the inner wall of the friction sliding ring are formed to form a corresponding planar phase card to be synchronously rotated.
  • the outer end surface of the friction retaining ring is fitted with a front retaining ring, and the inner diameter of the front retaining ring is matched with the outer diameter of the threaded mandrel cam ring and pressed against the inner wall of the pulley hub.
  • the outer end surface of the positioning sleeve is fitted with a rear retaining ring, and the inner diameter of the rear retaining ring is matched with the outer diameter of the washer, and is pressed together with the inner wall of the pulley hub.
  • the outer end surface of the ball bearing is pressed into a dustproof gasket which is matched with the outer diameter of the threaded mandrel and pressed together with the inner wall of the pulley hub.
  • the damper spring has a square cross section, that is, the damper spring is wound by a square spring wire.
  • a one-way pulley that is frictionally clutched by a spring including a threaded mandrel, a ball bearing, a friction spring, a friction stop ring, a friction sliding ring, a positioning sleeve, a belt hub, a thread core
  • the shaft extends into the pulley hub, and both ends of the two are equipped with ball bearings, the friction stop ring is annular; the friction sliding ring is partially annular, and the other part of the friction sliding ring is folded 90 degrees.
  • the through hole passes through and is positioned to connect the threaded mandrel; the friction spring is sleeved on the threaded mandrel, and there is a gap between the two; the friction spring is inserted into the inner hole of the annular portion of the friction sliding ring, and the other end is The inner diameter of the friction retaining ring is inserted, and the inner diameters of the friction retaining ring and the friction sliding ring are smaller than the outer diameter of the friction spring; the outer ring of the friction retaining ring is fixedly connected with the inner wall of the pulley hub; the outer ring of the friction sliding ring The clearance fits the positioning sleeve, and the outer ring of the positioning sleeve is fixedly connected with the inner wall of the pulley hub.
  • the inner wall of the frictional sliding ring through hole forms two opposite side planes; correspondingly, the outer wall of the threaded mandrel forms two planes, and is positioned and connected by the corresponding planar fit of the two.
  • the outer wall of the threaded mandrel forms a step portion, and the inner side of the friction sliding ring is attached to the step; the threaded mandrel is snapped A locating spacer that positions the outer side of the frictional slide ring laterally to the threaded mandrel.
  • the inner side of the ball bearing is provided with a blocking piece, the inner diameter of the blocking piece is spaced from the outer diameter of the threaded mandrel, and the outer diameter of the blocking piece is fixedly connected with the inner wall of the belt hub.
  • the outer end surface of the ball bearing is pressed into the dustproof gasket, and the outer ring of the dustproof gasket is pressed together with the inner ring of the pulley hub, and the inner ring is matched with the outer ring of the threaded mandrel.
  • the outer end surface of the ball bearing is pressed into the dustproof gasket, and the outer ring of the dustproof gasket is rotatably fitted with the inner ring of the pulley hub, and the inner ring is tightly fitted with the outer ring of the threaded mandrel.
  • the low temperature grease is injected into the friction spring.
  • the one-way coupling damper pulley of the spring friction brake of the invention has the advantages of reliable transmission, long service life, simple structure, low manufacturing cost and simple manufacture of the damper spring.
  • FIG. 1 is a schematic structural view of a one-way coupling damper pulley of a spring friction brake of Embodiment 1.
  • Figure 2 is a schematic view of the spring damper mechanism.
  • Figure 3 is a schematic view of the spring friction clutch mechanism.
  • Figure 4 is a schematic diagram of a one-way coupling damping mechanism for spring friction braking.
  • Figure 5 is a structural view of a threaded mandrel.
  • Figure 6 is a right side view of Figure 5.
  • Figure 7 is a structural view of the damper spring.
  • Figure 8 is a left side view of Figure 7.
  • Figure 9 is a structural view of the damper washer.
  • Figure 10 is a left side view of Figure 9.
  • Figure 11 is a structural view of a friction sliding ring.
  • Figure 12 is a left side view of Figure 11 .
  • Figure 13 is a structural view of the gasket.
  • Figure 14 is a left side view of Figure 13.
  • Figure 15 is a structural view of a four-way circlip.
  • Figure 16 is a left side view of Figure 15.
  • Figure 17 is a structural view of a friction spring.
  • Figure 18 is a left side view of Figure 17 .
  • Figure 19 is a structural view of a friction stop ring.
  • Figure 1-19 1-1, threaded mandrel, 1-2, shock absorbing spring, 1-3, shock absorbing washer, 1-4, friction sliding ring, 1-5, washer, 1-6, square card Spring, 1-7, friction spring, 1-8, friction stop ring, 1-9, front retaining ring, 1-10, front ball bearing, 1-11, positioning sleeve, 1-12, rear retaining ring, 1 -13, rear ball bearing, 1-14, belt hub, 1-15, front dustproof gasket, 1-16, rear dustproof gasket.
  • Figure 20 is a structural view showing the structure of the one-way pulley that is frictionally clutched by the spring in the second embodiment.
  • Figure 21 is a view showing the spring friction clutch mechanism of the second embodiment.
  • Figure 22 is a right side view of Figure 2.
  • Figure 23 is a one-way clutch assembly diagram of the spring friction of the embodiment 2.
  • Figure 24 is a front elevational view of the threaded mandrel.
  • Figure 25 is a right side view of the threaded mandrel.
  • Figure 26 is a front view of the friction spring.
  • Figure 27 is a right side view of the friction spring.
  • Figure 28 is a structural view of the friction stop ring.
  • Figure 29 is a structural view of the friction sliding ring.
  • Figure 30 is a right side view of the friction slide ring.
  • Figure 31 is a structural view of the flap.
  • Figure 32 is a plan view of the shutter.
  • Figure 33 is a structural view of the positioning spacer.
  • Figure 34 is a plan view of the positioning spacer.
  • Figure 20-34 2-1, threaded mandrel, 2-2, ball bearing, 2-3, blank, 2-4, friction spring, 2-5, friction stop, 2-6, friction sliding Circle, 2-7, positioning sleeve, 2-8, positioning washer, 2-9, belt hub, 2-10, dustproof gasket.
  • the one-way coupling damper pulley of the spring friction brake of the embodiment includes a threaded mandrel 1-1, a damper spring 1-2, a damper washer 1-3, and a friction sliding ring 1-4. , washer 1-5, square circlip 1-6, friction spring 1-7, friction stop ring 1-8, front retaining ring 1-9, front ball bearing 1-10, positioning sleeve 1-111, rear retaining ring 1-12, rear ball bearing 1-13, belt hub 1-14, front dustproof gasket 1-15, rear dustproof gasket 1-16.
  • the inner hole of the belt hub 1-14 is provided with a set of damping spring mechanism, and the damping spring mechanism comprises a threaded mandrel 1-1, a damping spring 1-2, a damping washer 1-3, a friction movable sleeve 1-4, a washer 1 -5, square circlip 1-6, threaded mandrel 1-1 outer diameter 1-1-1 end forms a convex ring 1-1-6 with a spiral surface, the spiral surface faces the other side, the spiral surface A step 1-1-2 is also formed; the other end of the outer diameter 1-1-1 forms a ring of concave card slots 1-1-3.
  • the two ends of the threaded mandrel 1 are respectively the outer diameters 1-1-4, 1-1-5, and the outer diameters 1-1-4 are adjacent to the convex rings 1-1-6, and the outer diameters are 1-1-4, 1
  • the diameter of -1-5 is smaller than the diameter of the convex ring 1-1-6.
  • Threaded mandrel 1-1 Outer diameter 1-1-1 is fitted with a damping spring 1-2.
  • the damping spring is made of square steel wire.
  • the square wire has the characteristics of large elastic torque and small volume.
  • One end 1-2-1 of the damper spring 1-2 abuts against the spiral surface of the spiral mandrel yoke 1-1-6, and the end face 1-2-2 of the damper spring 1-2 is threaded on the thread
  • the step of the mandrel 1-1 is 1-1-2; the other end of the damper spring 1-2 is equipped with a shock absorbing washer 1-3, and the damper washer 1-3 is attached to the threaded mandrel 1- 1.
  • the shock absorbing washer 1-3 has a helicoid surface 1-3-3, and this spiral surface 1-3-3 is matched with the spiral surface 1-2-4 of the damper spring 1-2.
  • the damper washers 1-3 also form a step 1-3-1 which is placed at the end face of the head 1-2-3 of the damper spring.
  • the outer diameter of the shock absorbing washer 1-3 has two opposite planes 1-3-2.
  • the friction sliding ring 1-4 is partially annular and the other portion is internally folded by 90 degrees.
  • the folded portion has a through hole, and the inner wall of the through hole forms a plane 1-4-1 at opposite sides.
  • the outer surface 1-3-2 of the shock absorbing washer 1-3 is fitted with a friction sliding ring 1-4, and the two convex portions 1-4-1 of the inner hole of the friction sliding ring 1-4 and the outer diameter of the shock absorbing washer 1-3
  • the two planes 1-3-2 are respectively aligned and nested.
  • a washer 1-5 is inserted into the plane 1-3-4 of the damper washer 1-3, and the washer 1-5 simultaneously holds the side of the friction sliding ring 1-4, and the other side of the washer 1-5 is pressed again.
  • a four-way circlip 1-6 is inserted, and the inner diameter of the four-way circlip 1-6 is clamped in the slot 1-1-1 of the threaded mandrel 1-1, thereby being fitted with a set of spring damper mechanisms. See Figure 2.
  • the spring friction clutch mechanism is based on the damper spring mechanism, and the outer diameter of the friction spring 1-7 is inserted into the inner hole 1-4-2 of the friction sliding ring 1-4, and the other end is The diameter is inserted into the friction retaining ring 1-8, and the friction stop ring 1-8 is attached to one end surface of the friction sliding ring 1-4 to form a set of spring friction clutch mechanisms. Inject high and low temperature grease into the inner diameter of the friction spring to make the contact part rolling and lubricated.
  • the other end plane of the friction retaining ring 1-8 is fitted with a front retaining ring 1-9, and the front retaining ring 1-9 is just outside the convex ring 1-1-6 of the threaded mandrel 1-1, the front retaining ring
  • the other end plane of 1-9 is equipped with a front ball bearing 1-10, and the front ball bearing 1-10 is at the outer diameter of the threaded mandrel 1-1, 1-1-4, and the inner hole is pressed into the thread.
  • the outer diameter of the mandrel 1-1 is 1-1-4. Friction sliding ring 1-4 The outer diameter is fitted into a positioning sleeve 1-11. The clearance between the two is matched.
  • the friction sliding ring 1-4 can slide freely in the inner diameter of the positioning sleeve 1-11.
  • the rear end plane of the positioning sleeve 1-11 is fitted with a rear retaining ring 1-12, and the rear retaining ring 1-12 is outside the portion of the washer 1-5 with a clearance fit therebetween.
  • the other plane of the rear retaining ring 1-12 is further loaded with a ball bearing 1-13, and the inner diameter of the ball bearing 1-13 is pressed into the outer diameter 1-1-5 of the thread mandrel 1-1 to form a group.
  • One-way coupling damping mechanism for spring friction braking See Figure 4.
  • the one-way coupling damper mechanism of the spring friction brake is pressed into the inner hole of the belt hub 1-14, that is, the ball bearing at both ends 1-10, 1-13 outer diameter, front retaining ring 1-9, friction retaining ring 1-8 outer diameter, positioning sleeve 1-11 outer diameter, rear retaining ring 1-12 outer ring are pressed against the pulley hub
  • the inner wall of 1-14 then press a front dustproof gasket 1-15 from the front end plane of the front ball bearing 1-10, and press a rear dustproof gasket 1 on the rear end plane of the rear ball bearing 1-13.
  • the front and rear dustproof gaskets are matched with the outer diameter of the threaded mandrel 1-1, and assembled into a set of one-way coupling damper pulleys with spring friction brake.
  • the outer diameters of the two front and rear ball bearings are precisely matched to the inner diameter of the pulley hubs 1-14.
  • the inner bores of the two ball bearings are precisely matched with the two ends of the threaded mandrel 1-1 to support the radial load.
  • the rear end surface of the rear ball bearing 1-13 is fitted with a rear dustproof gasket 1-16, and the front end surface of the front ball bearing 1-10 is fitted with a front dustproof gasket 1-15, two dustproof gaskets.
  • the outer diameter is pressed into the inner wall of the pulley hub 1-14, and the inner diameters of the two dustproof gaskets are matched with the outer diameter of the threaded mandrel 1-1.
  • the inner diameters of the friction retaining ring 1-8 and the friction sliding ring 1-4 are smaller than the outer diameter of the friction spring 1-7, thereby increasing the elastic tension of the outer diameter of the friction spring, and the two ends of the friction spring 1-7 are not fixed at any On the component, the friction springs 1-7 and the friction retaining rings 1-8 and the frictional sliding rings 1-4 are frictionally locked, and the power is transmitted in a free state and the transmission of power is thereby interrupted.
  • the smoothness of the inner hole of the friction retaining ring 1-8 and the friction sliding ring 1-4 is relatively high, the friction spring 1-7 will rotate in that circle in the free state. Friction spring 1-7
  • Friction spring 1-7 Both ends and friction stop ring 1-8, friction slide ring 1-4 can be alternately separated, the friction spring is not easy to break, and the service life is enhanced.
  • the frictional force is in a locked state, and the rotational torque is transmitted from the belt to the pulley hub 1-14, and then transmitted to the friction retaining ring 1-8, and then transmitted to the friction spring 1-7, and then transmitted to the friction sliding ring 1-4, It is transmitted to the shock absorbing washer 1-3, and then transmitted to the damper spring 1-2, because the damper washer 1-3 has a spiral surface 1-3-3 and a spiral surface 1-2-1 of the damper spring 1-2.
  • the step 1-3-1 of the shock absorbing washer 1-3 is placed on the end face 1-2-3 of the damper spring 1-2, and when the damper spring 1-2 is transmitted by an external force, the steering of the torque is
  • the damper spring 1-2 expands to form elasticity, relieves the instantaneous torque shock of the external force, and then transmits it to the thread mandrel 1-1, and finally the threaded mandrel 1-1 Drive the generator rotor to work.
  • the rotational speed of the belt hub 1-14 is slowed down, the inertia speed of the generator rotor exceeds the rotational speed of the pulley hub 1-14.
  • the threaded mandrel 1-1 will have a convex ring 1-1-6 with its spiral surface damped.
  • the spiral surface 1-2-1 of the spring 1-2 is rotated to cause the damper spring 1-2 to be pressed in the axial direction.
  • the damper washer 1-3 is rotated, and finally the friction sliding ring 1-4 is rotated, and at this time, the rotating direction of the friction sliding ring 1-4 and the friction spring 1 are -7 coiling direction is the same, the outer diameter of the friction spring 1-7 will be deformed and contracted, the frictional force is released and a free state is generated, and the generator rotor can rotate freely.
  • the one-way pulley with spring friction clutch brake of the present embodiment includes a threaded mandrel 2-1, a ball bearing 2-2, a flap 2-3, a friction spring 2-4, and a friction stop.
  • a spring friction clutch mechanism is provided in the belt hub 2-9, which is assembled by a friction spring 2-4, a friction stop ring 2-5, a friction sliding ring 2-6, etc. See Fig. 21, the friction stop ring 2 -5 is annular, the frictional sliding ring 2-6 is partially annular, and the other part is folded 90 degrees.
  • the bent portion has a through hole, and the through hole has a circular shape to remove the shape of the two opposite arcuate portions.
  • the inner edge is a plane 2-6-1.
  • the friction retaining ring 2-5 and the annular portion of the friction sliding ring 2-6 have the same inner diameter and one end face of the two.
  • One end of the outer diameter of the friction spring 2-4 is fitted into the inner hole of the annular portion of the friction sliding ring 2-6, and the other end is fitted into the inner hole of the friction retaining ring 2-5 to form a set of spring friction clutch mechanism.
  • the inner diameters of the friction retaining ring 2-5 and the friction sliding ring 2-6 are slightly smaller than the outer diameter of the friction spring 2-4, thereby increasing the elastic tension of the outer diameter of the friction spring 2-4, the two ends of the friction spring 2-4 Not fixed to any of the components, the friction springs 2-4 and the friction retaining rings 2-5 and the frictional sliding rings 2-6 are frictionally locked, and the free state is used to transmit power and thereby interrupt the transmission of power.
  • the friction spring 2-4 When the smoothness of the inner holes of the friction retaining ring 2-5 and the friction sliding ring 2-6 is relatively high, the friction spring 2-4 will rotate in that ring in the free state.
  • the friction springs of the friction structure 2-4 are alternately separated from the friction retaining ring 2-5 and the friction sliding ring 2-6, and the friction springs 2-4 are not easily broken, greatly enhancing the service life.
  • the central diameter of the threaded mandrel 2-1 is larger than the diameter of the two ends, the outer diameter of the front end is pressed into one ball bearing 2-2, and the inner side of the ball bearing 2-2 is first fitted with a blocking piece 2-3 (block 2 - 3, leaving a gap with the outer diameter of the threaded mandrel 2-1), the blocking piece 2-3 is level with the front end step of the threaded mandrel 2-1, and then the spring friction clutch mechanism, the friction spring 2-4
  • the inner diameter has a gap with the outer diameter of the threaded mandrel 2-1.
  • the friction friction sliding ring 2-6 in the spring friction clutch mechanism has two planes 2-6-1 of the inner hole, which are respectively arranged on the two concave planes 2-1-1 of the outer ring of the other end of the thread mandrel 2-1.
  • Friction sliding ring 2-6 outer diameter is fitted into a positioning sleeve 2-7 with a gap between them.
  • One end surface of the positioning sleeve 2-7 is attached to one end of the friction stopping ring 2-5, the other end surface is fitted with a rear blocking piece 2-3, and the rear blocking piece 2-3 is bent at the friction sliding ring 2-6.
  • the inner diameter of the rear flap 2-3 is fitted with a positioning spacer 2-8, and the positioning spacer 2-8 is clamped on the threaded spindle 2-1. It positions the frictional sliding ring 2-6 in a lateral direction on the threaded mandrel 2-1 (the inside of the frictional sliding ring 2-6 is attached to the step at the rear end of the threaded mandrel 2-1). There is a gap between the rear stop 2-3 and the positioning spacers 2-8.
  • the rear end of the threaded mandrel 2-1 is pressed into a ball bearing 2-2, and the inner diameter of the ball bearing 2-2 is pressed into the threaded mandrel 2-1.
  • the outer diameter of the rear end, the inner side of the ball bearing 2-2 is attached to the rear flap 2-3 and the positioning spacer 2-8 to form a set of one-way clutch assemblies.
  • a ball bearing 2-2 When assembling, a ball bearing 2-2 is pressed into the front step of the threaded mandrel 2-1, the inner end of the ball bearing 2-2 is flatly fitted with a blocking piece 2-3, and the spring friction clutch mechanism is set on the threaded mandrel.
  • the end surface of a frictional retaining ring 2-5 in the spring friction clutch mechanism is attached to the plane of the flap 2-3, and the two planes of the middle outer wall of the threaded mandrel 2-1 are 2-1-1 and friction
  • the inner hole of the sliding ring is matched with two planes 2-6-1, and the outer diameter of the friction sliding ring 2-6 is fitted into a positioning sleeve 2-7, and the inner hole of the positioning sleeve 2-7 is larger than the outer diameter of the friction sliding ring 2-6
  • the friction sliding ring 2-6 can be rotated in the inner diameter of the positioning sleeve 2-7.
  • the other end of the positioning sleeve 2-7 is fitted with a rear flap 2-3, the inner hole of the rear flap 2-3 is fitted with a positioning spacer 2-8, and the other ball bearing 2-2 is bored.
  • the outer diameter of the rear end of the threaded mandrel 2-1 is pressed into the plane of the rear flap 2-3 and the positioning washer 2-8 to form a set of one-way clutch assemblies.
  • the outer diameter of the one-way clutch assembly is pressed against the inner diameter of the pulley hub 2-9, and two dustproof gaskets are pressed into the front and rear of the two ball bearings 2-2.
  • the one-way coupled damping pulley of the automobile generator of the invention has the advantages of simple structure, long service life, simple manufacturing process and low manufacturing cost.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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Abstract

一种弹簧摩擦制动的单向耦合减震皮带轮，包括螺纹芯轴（1-1），螺纹芯轴（1-1）伸入皮带轮毂（1-14），皮带轮毂（1-14）内壁压入摩擦止动圈（1-8）、定位套（1-11），螺纹芯轴（1-1）的外径形成凸环（1-1-6），凸环（1-1-6）具有台阶（1-1-2）；螺纹芯轴（1-1）外套减震垫圈（1-3），减震垫圈（1-3）形成台阶（1-3-1）；螺纹芯轴（1-1）外套减震弹簧（1-2），减震弹簧（1-2）一头（1-2-1）顶于螺纹芯轴（1-1）的凸环（1-1-6），该头的端面（1-2-2）顶于凸环（1-1-6）的台阶（1-1-2）；减震弹簧（1-2）另一头（1-2-3）顶于减震垫圈（1-3），该头的端面顶于减震垫圈（1-3）的台阶（1-3-1）；减震垫圈（1-3）外套并转动配合摩擦滑动圈（1-4）；摩擦弹簧（1-7）外套于减震弹簧（1-2），摩擦弹簧（1-7）一头装入摩擦滑动圈（1-4）内，另一头装入摩擦止动圈（1-8）内，摩擦滑动圈（1-8）的外壁与定位套（1-11）间隙配合；摩擦止动圈（1-8）和摩擦滑动圈（1-4）的内径均比摩擦弹簧（1-7）的外径小，以增加弹簧的张力；摩擦弹簧（1-7）与摩擦止动圈（1-8）、摩擦滑动圈（1-4）通过摩擦锁定，且摩擦弹簧（1-7）与摩擦止动圈（1-8）、摩擦滑动圈（1-4）能交替分离。

Description

单向耦合减震皮带轮 技术领域
本发明属于汽车发电机用的单向耦合减震皮带轮制造技术领域， 特别涉及到由弹簧摩擦 制动的单向耦合减震机构， 具体为弹簧摩擦制动的单向耦合减震皮带轮。 背景技术
汽车发电机单向离合皮带轮已经被世界上的一些高档汽车广泛应用。 当发电机经由皮 带、 皮带轮单元等汽车发动机的曲轴驱动时， 由于进气冲程、 压縮冲程、 燃烧和膨胀冲程及 排气冲程的循环， 在皮带轮、 转轴和皮带轮上可能产生过大的旋转转矩 （扭矩） 和张力。 在 曲轴的旋转瞬时下降的趋势下， 发电机转轴具有很大的惯性量， 皮带在转矩产生的方向上受 拉且产生张力变化， 这可能致使皮带过载而降低皮带的使用寿命。
在现有技术中， 有一种 OAD弹簧摩擦单向耦合减震发电机皮带轮， 其能够通过弹簧摩 擦单向耦合使动力中断或使用扭矩卷簧的弹性方式使扭矩变形， 来减小上述的这种皮带在旋 转变化中产生的过载。 如中国专利申请号 200880128290.0、 201020519051.2所公开的技术方 案。 它既能过滤高速振动， 也能过滤低速振动。 但目前此类结构的 OAD存在以下技术问题： 1、摩擦弹簧的一头固定于保持架上， 其把摩擦弹簧的此头压成直线， 直线和圈形会形成一个 弯角点， 而摩擦力就集中到这个弯角点上， 当发电机在高低速转动产生摩擦离合时， 固定在 保持架上的这一头摩擦弹簧弯角点容易断裂。 2、 另外， 摩擦弹簧弯角点和外圆表面一次性全 部用于皮带轮毂内径产生摩擦的止动和超越， 不仅使用寿命低， 而且制造工艺复杂、 成本很 高。 发明内容
本发明公开了一种弹簧摩擦制动的单向耦合减震皮带轮，其解决了上述单向离合皮带轮 存在的技术问题。
本发明解决其技术问题所采用的技术方案如下： 弹簧摩擦制动的单向耦合减震皮带轮， 包括螺纹芯轴、 减震弹簧、 摩擦弹簧、 摩擦止动圈、 摩擦滑动圈、 减震垫圈、 滚珠轴承、 定 位套、 皮带轮毂， 螺纹芯轴伸入皮带轮毂， 两者的两端各装配一滚珠轴承， 皮带轮毂内壁压 入摩擦止动圈、 定位套， 螺纹芯轴的外径形成一凸环， 凸环朝向对侧的侧面上还具有一台阶； 与凸环相对侧的螺纹芯轴外套减震垫圈， 减震垫圈形成一台阶； 螺纹芯轴外套减震弹簧， 减 震弹簧的第一头顶于螺纹芯轴的凸环， 且该头的端面顶于凸环的台阶处； 减震弹簧的第二头 顶于减震垫圈， 且该头的端面顶于减震垫圈的台阶处； 减震垫圈外套装摩擦滑动圈， 两者能 同步转动； 摩擦弹簧套于所述的减震弹簧之外， 摩擦弹簧的外径一头装入摩擦滑动圈的内孔 处， 另一头外径装入摩擦止动圈之内， 摩擦滑动圈的外壁与所述的定位套间隙配合； 摩擦止 动圈和摩擦滑动圈的内径均比摩擦弹簧的外径小， 增加了摩擦弹簧的弹性张力； 摩擦弹簧与 摩擦止动圈、摩擦滑动圈通过摩擦锁定， 且摩擦弹簧与摩擦止动圈、摩擦滑动圈能交替分离。
优选的， 螺纹芯轴的凸环顶触减震弹簧的一侧面为螺旋面。
优选的， 减震垫圈顶触减震弹簧的一侧面为螺旋面。
优选的， 螺纹芯轴形成一圈凹形卡槽； 螺纹芯轴外套垫圈， 垫圈处于减震垫圈及摩擦滑 动圈的外侧面， 垫圈的外侧面装入一四方卡簧， 四方卡簧内径卡紧于螺纹芯轴的凹形卡槽。
优选的，减震垫圈的外径与摩擦滑动圈的内壁通过两者形成相对应的平面相卡而能同步 转动。
优选的，摩擦止动圈的外端面装入一前挡圈，前挡圈内径与螺纹芯轴凸环外径间隙配合， 与皮带轮毂的内壁压在一起。
优选的， 定位套的外端面装入一后挡圈， 后挡圈内径与垫圈外径间隙配合， 与皮带轮毂 的内壁压在一起。
优选的， 滚珠轴承的外端面压入一防尘垫片， 防尘垫片与螺纹芯轴的外径间隙配合， 与 皮带轮毂的内壁压在一起。
优选的， 减震弹簧的断面呈正方形即减震弹簧是由正方形弹簧钢丝卷成的。
本发明公开的第二种技术方案如下： 一种用弹簧摩擦离合的单向皮带轮， 包括螺纹芯轴、 滚珠轴承、 摩擦弹簧、 摩擦止动圈、 摩擦滑动圈、 定位套、 皮带轮毂， 螺纹芯轴伸入皮带轮 毂， 两者的两端各装配有滚珠轴承， 摩擦止动圈呈圆环状； 摩擦滑动圈的局部呈圆环状， 摩 擦滑动圈的另一部内折 90度， 此部具有一个通孔， 此通孔穿过并定位连接所述的螺纹芯轴； 摩擦弹簧外套于螺纹芯轴， 两者留有间隙； 摩擦弹簧一端装入摩擦滑动圈圆环部的内孔， 另 一端装入摩擦止动圈的内孔， 摩擦止动圈和摩擦滑动圈的内径都比摩擦弹簧的外径小； 摩擦 止动圈的外圈与皮带轮毂的内壁固定连接； 摩擦滑动圈的外圈间隙配合定位套， 定位套的外 圈与皮带轮毂的内壁固定连接。
优选的， 摩擦滑动圈通孔的内壁形成两个相对侧的平面； 与此相对应的， 螺纹芯轴的外 壁形成两个平面， 通过两者相对应平面的贴合而定位连接。
优选的， 螺纹芯轴的外壁形成台阶部， 摩擦滑动圈内侧贴于该台阶处； 螺纹芯轴上卡接 一定位垫片， 定位垫片将摩擦滑动圈的外侧横向定位于螺纹芯轴。
优选的， 滚珠轴承内侧面装上一挡片， 挡片的内径与螺纹芯轴的外径留有间隙， 挡片的 外径与皮带轮毂的内壁固定连接。
优选的，滚珠轴承的外端面压入防尘垫片，防尘垫片的外圈与皮带轮毂的内圈压在一起， 而其内圈与螺纹芯轴的外圈间隙配合。
优选的，滚珠轴承的外端面压入防尘垫片，防尘垫片的外圈与皮带轮毂的内圈转动配合， 而其内圈与螺纹芯轴的外圈紧配合。
优选的， 摩擦弹簧内注入高低温油脂。
本发明弹簧摩擦制动的单向耦合减震皮带轮具有传动可靠、 使用寿命长、 结构简单、 制 造成本低且减震弹簧的制造简易等优点。 附图说明
图 1为实施例 1弹簧摩擦制动的单向耦合减震皮带轮的结构示意图。
图 2是弹簧减震机构示意图。
图 3是弹簧摩擦离合机构示意图。
图 4是弹簧摩擦制动的单向耦合减震机构示意图。
图 5是螺纹芯轴的结构图。
图 6是图 5的右侧视图。
图 7是减震弹簧的结构图。
图 8是图 7的左侧视图。
图 9是减震垫圈的结构图。
图 10是图 9的左侧视图。
图 11是摩擦滑动圈的结构图。
图 12是图 11的左侧视图。
图 13是垫圈的结构图。
图 14是图 13的左侧视图。
图 15是四方卡簧的结构图。
图 16是图 15的左侧视图。
图 17是摩擦弹簧的结构图。
图 18是图 17的左侧视图。 图 19是摩擦止动圈的结构图。
图 1-19中： 1-1、 螺纹芯轴， 1-2、 减震弹簧， 1-3、 减震垫圈， 1-4、 摩擦滑动圈， 1-5、 垫圈， 1-6、 四方卡簧， 1-7、 摩擦弹簧， 1-8、 摩擦止动圈， 1-9、 前挡圈， 1-10、 前滚珠轴承， 1-11、定位套， 1-12、后挡圈， 1-13、后滚珠轴承， 1-14、皮带轮毂， 1-15、前防尘垫片， 1-16、 后防尘垫片。
图 20为实施例 2用弹簧摩擦离合的单向皮带轮的结构意示图。
图 21为实施例 2的弹簧摩擦离合机构图。
图 22是图 2的右视图。
图 23为实施例 2弹簧摩擦的单向离合总成图。
图 24是螺纹芯轴的主视图。
图 25是螺纹芯轴的右视图。
图 26是摩擦弹簧的主视图。
图 27是摩擦弹簧的右视图。
图 28是摩擦止动圈的结构视图。
图 29是摩擦滑动圈的结构视图。
图 30是摩擦滑动圈的右视图。
图 31是挡片的结构视图。
图 32是挡片平面视图。
图 33是定位垫片的结构视图。
图 34是定位垫片的平面视图。
图 20-34中： 2-1、 螺纹芯轴， 2-2、 滚珠轴承， 2-3、 挡片， 2-4、 摩擦弹簧， 2-5、 摩擦止 动圈， 2-6、 摩擦滑动圈， 2-7、 定位套， 2-8、 定位垫片， 2-9、 皮带轮毂， 2-10、 防尘垫片。 具体实施方式
下面结合附图对本发明实施例作详细说明。
实施例 1
如图 1-19所示， 本实施例弹簧摩擦制动的单向耦合减震皮带轮包括螺纹芯轴 1-1、 减震 弹簧 1-2、 减震垫圈 1-3、 摩擦滑动圈 1-4、 垫圈 1-5、 四方卡簧 1-6、 摩擦弹簧 1-7、 摩擦止动 圈 1-8、 前挡圈 1-9、 前滚珠轴承 1-10、 定位套 1-11、 后挡圈 1-12、 后滚珠轴承 1-13、 皮带轮 毂 1-14、 前防尘垫片 1-15、 后防尘垫片 1-16。 皮带轮毂 1-14内孔装有一组减震弹簧机构， 减震弹簧机构包括螺纹芯轴 1-1、 减震弹簧 1-2、 减震垫圈 1-3、 摩擦活动套 1-4、 垫圈 1-5、 四方卡簧 1-6， 螺纹芯轴 1-1外径 1-1-1一端 形成带有螺旋面的凸环 1-1-6， 其螺旋面朝向另一侧， 该螺旋面上还形成一处台阶 1-1-2; 该 外径 1-1-1的另一端形成一圈凹形卡槽 1-1-3。 螺纹芯轴 1的两端分别是外径 1-1-4、 1-1-5， 外径 1-1-4与凸环 1-1-6相邻， 外径 1-1-4、 1-1-5的直径小于凸环 1-1-6的直径。
螺纹芯轴 1-1的外径 1-1-1处套装入一只减震弹簧 1-2，减震弹簧是由正方形钢丝卷成的， 正方形钢丝具有弹性扭矩大、体积小的特点。减震弹簧 1-2的一头 1-2-1抵靠在螺旋芯轴凸环 1-1-6的螺旋面上， 且减震弹簧 1-2该头的端面 1-2-2顶于螺纹芯轴 1-1的台阶处 1-1-2; 减震 弹簧 1-2的另一头 1-2-3装上减震垫圈 1-3， 减震垫圈 1-3外套于螺纹芯轴 1-1。 减震垫圈 1-3 具有一个螺旋面 1-3-3，此螺旋面 1-3-3与减震弹簧 1-2的螺旋面 1-2-4处相抵配合。减震垫圈 1-3还形成一处台阶 1-3-1， 其顶于减震弹簧该头 1-2-3的端面处。减震垫圈 1-3的外径有两个 相对的平面 1-3-2。
摩擦滑动圈 1-4的局部呈环形， 另一部内折 90度， 该折部具有通孔， 通孔的内壁两相 对处形成平面 1-4-1。 减震垫圈 1-3的外平面 1-3-2外装入摩擦滑动圈 1-4， 摩擦滑动圈 1-4内 孔的两个凸处 1-4-1与减震垫圈 1-3外径的两平面处 1-3-2分别对齐套入。 减震垫圈 1-3的平 面 1-3-4侧装入一只垫圈 1-5， 垫圈 1-5同时将摩擦滑动圈 1-4的侧面顶住， 垫圈 1-5的另一 侧再压入一只四方卡簧 1-6， 四方卡簧 1-6内径卡紧在螺纹芯轴 1-1的卡槽内 1-1-3， 从而配 装成了一组弹簧减震机构。 参见图 2。
如图 3所示， 弹簧摩擦离合机构在减震弹簧机构的基础上， 把摩擦弹簧 1-7外径一头装 入到摩擦滑动圈 1-4的内孔 1-4-2处， 另一头外径装入到摩擦止动圈 1-8的之内， 摩擦止动圈 1-8与摩擦滑动圈 1-4的一端面相贴， 形成一组弹簧摩擦离合机构。 向摩擦弹簧内径注入高低 温油脂， 使接触部位滚动润滑。
摩擦止动圈 1-8的另一端平面装入一只前挡圈 1-9，前挡圈 1-9刚好处于螺纹芯轴 1-1的 凸环 1-1-6之外， 前挡圈 1-9的另一端平面再装上一只前滚珠轴承 1-10， 前滚珠轴承 1-10处 于螺纹芯轴 1-1的外径 1-1-4夕卜，其内孔压入到螺纹芯轴 1-1的外径 1-1-4上。摩擦滑动圈 1-4 外径装入一只定位套 1-11， 两者间隙配合， 摩擦滑动圈 1-4能在定位套 1-11内径自由滑动。 定位套 1-11的后一端平面装入一只后挡圈 1-12，后挡圈 1-12处于垫圈 1-5的局部之外， 两者 间间隙配合。 后挡圈 1-12的另一平面再装入一只滚珠轴承 1-13， 滚珠轴承 1-13的内径压入 螺纹芯轴 1-1的外径 1-1-5处， 形成了一组弹簧摩擦制动的单向耦合减震机构。 参见图 4。
把弹簧摩擦制动的单向耦合减震机构， 压入到皮带轮毂 1-14 的内孔， 即两端滚珠轴承 1-10、 1-13的外径、 前挡圈 1-9、 摩擦止动圈 1-8外径、 定位套 1-11外径、 后挡圈 1-12的外 圈均压在皮带轮毂 1-14的内壁， 然后从前滚珠轴承 1-10的前一端平面压入一只前防尘垫片 1-15， 后滚珠轴承 1-13的后一端平面压入一只后防尘垫片 1-16， 前后防尘垫片均与螺纹芯轴 1-1的外径间隙配合， 组装成了一组弹簧摩擦制动的单向耦合减震皮带轮。
两只前后滚珠轴承的外径与皮带轮毂 1-14 的内径精密配合， 两滚珠轴承的内孔与螺纹 芯轴 1-1的两头精密配合， 用于支撑径向载荷。 后滚珠轴承 1-13的后端面装入一只后防尘垫 片 1-16， 前滚珠轴承 1-10的前端面装入一只前防尘垫片 1-15， 两防尘垫片的外径均压入皮带 轮毂 1-14的内壁， 两防尘垫片的内径均与螺纹芯轴 1-1的外径间隙配合。
摩擦止动圈 1-8和摩擦滑动圈 1-4的内径都比摩擦弹簧 1-7的外径小， 从而增加了摩擦 弹簧外径的弹性张力， 摩擦弹簧 1-7的两头没有固定在任何部件上， 摩擦弹簧 1-7与摩擦止 动圈 1-8、摩擦滑动圈 1-4通过摩擦锁定， 采用自由状态传递动力并由此中断动力的传递。 当 摩擦止动圈 1-8和摩擦滑动圈 1-4内孔的光洁度某个比较高时，摩擦弹簧 1-7在自由状态下就 会在那个圈内转动。 摩擦弹簧 1-7两头与摩擦止动圈 1-8、 摩擦滑动圈 1-4可以交替分离， 摩 擦弹簧不易断裂， 增强了使用寿命。
当摩擦止动圈 1-8及摩擦滑动圈 1-4的扭力旋向与摩擦弹簧 1-7的盘绕方向相反时， 摩 擦弹簧 1-7的外径就会产生扩张力， 与摩擦止动圈 1-8、 摩擦滑动圈 1-4的内径产生摩擦力而 出现锁定状态。 当摩擦止动圈 1-8、 摩擦滑动圈 1-4扭力旋向与摩擦弹簧 1-7的盘绕方向相同 时， 摩擦弹簧 1-7的外径就会变形收縮， 与摩擦止动圈 1-8、 摩擦滑动圈 1-4内径的摩擦力解 除而形成了自由状态， 由此中断动力的传递。
当汽车发动机曲轴驱动时， 旋转扭矩由皮带带到弹簧摩擦离合皮带轮上， 利用摩擦弹簧 1-7固有动力的传递和中断扭力之间切换的功能。 当摩擦弹簧 1-7外径受力与摩擦弹簧 1-7盘 绕方向相反时，摩擦弹簧 1-7外径就会扩张形成与摩擦止动圈 1-8和摩擦滑动圈 1-4内表面的 摩擦力而呈锁定状态， 使旋转扭矩由皮带传递到皮带轮毂 1-14， 再传递到摩擦止动圈 1-8， 后传递到摩擦弹簧 1-7， 再传递到摩擦滑动圈 1-4， 又传递到减震垫圈 1-3， 后传递到减震弹 簧 1-2， 因减震垫圈 1-3有一螺旋面 1-3-3与减震弹簧 1-2的螺旋面 1-2-1相抵配合，减震垫圈 1-3的台阶处 1-3-1顶于减震弹簧 1-2的端面处 1-2-3， 当减震弹簧 1-2受到外力传递时， 扭力 的转向与减震弹簧 1-2的盘绕方向相反时， 减震弹簧 1-2就会扩展形成有弹性， 缓解外力瞬 时的扭矩冲击， 再传递到螺纹芯轴 1-1， 最后由螺纹芯轴 1-1带动发电机转子工作。 当皮带轮 毂 1-14的转速放慢时， 发电机转子的惯性转速超过皮带轮毂 1-14的转速， 此时， 螺纹芯轴 1-1会用凸环 1-1-6其螺旋面向减震弹簧 1-2的螺旋面 1-2-1转动，使减震弹簧 1-2向轴向挤压， 当减震弹簧 1-2挤压到没有空隙时， 进而带动减震垫圈 1-3旋转， 最后带动摩擦滑动圈 1-4旋 转， 而此时摩擦滑动圈 1-4的旋转方向与摩擦弹簧 1-7盘绕方向相同， 摩擦弹簧 1-7的外径就 会变形收縮， 摩擦力解除且产生了自由状态， 发电机转子就可以自由惯性的转动。
实施例 2
如图 20-34所示， 本实施例用弹簧摩擦离合制动的单向皮带轮包括螺纹芯轴 2-1、滚珠轴 承 2-2、 挡片 2-3、 摩擦弹簧 2-4、 摩擦止动圈 2-5、 摩擦滑动圈 2-6、 定位套 2-7、 定位垫片 2-8、 皮带轮毂 2-9、 防尘垫片 2-10。
皮带轮毂 2-9之内设有弹簧摩擦离合机构， 其由摩擦弹簧 2-4、 摩擦止动圈 2-5、 摩擦滑 动圈 2-6等组装而成， 参见图 21， 摩擦止动圈 2-5呈圆环状， 摩擦滑动圈 2-6局部呈圆环状， 另一部内折 90度， 此折弯部具有一个通孔， 通孔呈圆形去掉两块相对弓形部的形状， 弓形部 的内边沿为平面 2-6-1。 摩擦止动圈 2-5、 摩擦滑动圈 2-6的圆环部两者的内径相等且两者的 一端面相贴。 摩擦弹簧 2-4外径的一端装入摩擦滑动圈 2-6圆环部的内孔， 另一端装入摩擦 止动圈 2-5的内孔， 形成一组弹簧摩擦离合机构。摩擦止动圈 2-5和摩擦滑动圈 2-6的内径都 比摩擦弹簧 2-4的外径稍小， 从而增加了摩擦弹簧 2-4外径的弹性张力， 摩擦弹簧 2-4的两头 没有固定在任何部件上， 摩擦弹簧 2-4与摩擦止动圈 2-5、 摩擦滑动圈 2-6通过摩擦锁定， 采 用自由状态传递动力并由此中断动力的传递。 当摩擦止动圈 2-5和摩擦滑动圈 2-6内孔的光 洁度某个比较高时， 摩擦弹簧 2-4在自由状态下就会在那个圈内转动。 此摩擦结构的摩擦弹 簧 2-4两头与摩擦止动圈 2-5、 摩擦滑动圈 2-6可以交替分离， 摩擦弹簧 2-4不容易断裂， 大 大增强了其使用寿命。
螺纹芯轴 2-1的中部直径大于两端直径， 其前端外径压入一只滚珠轴承 2-2， 滚珠轴承 2-2内侧面先装上一只挡片 2-3 (挡片 2-3与螺纹芯轴 2-1的外径留有间隙）， 挡片 2-3与螺纹 芯轴 2-1的前端台阶处持平， 再装入上述的弹簧摩擦离合机构， 摩擦弹簧 2-4的内径与螺纹 芯轴 2-1的外径留有间隙。 弹簧摩擦离合机构内的摩擦滑动圈 2-6， 其内孔两处平面 2-6-1分 别套装在螺纹芯轴 2-1另一端外圈的两个凹平面 2-1-1上。摩擦滑动圈 2-6外径装入一只定位 套 2-7， 两者间留有间隙。 定位套 2-7的一端面与摩擦止动圈 2-5的一端相贴， 另一端面装入 一只后挡片 2-3， 后挡片 2-3处于摩擦滑动圈 2-6折弯部 （朝螺纹芯轴 2-1后端的） 一侧， 后 挡片 2-3的内径装入一只定位垫片 2-8， 定位垫片 2-8卡于螺纹芯轴 2-1上， 其将摩擦滑动圈 2-6折弯部横向定位于螺纹芯轴 2-1 (摩擦滑动圈 2-6内侧贴于螺纹芯轴 2-1后端的台阶处）。 后挡片 2-3与定位垫片 2-8间留有间隙。
螺纹芯轴 2-1的后端再压入一只滚珠轴承 2-2， 滚珠轴承 2-2内径紧压入到螺纹芯轴 2-1 的后端外径， 滚珠轴承 2-2的内侧面与后挡片 2-3及定位垫片 2-8相贴， 形成一组单向离合总 成。
把前述单向离合总成的外径和皮带轮毂 2-9的内径紧压在一起即滚珠轴承 2-2、挡片 2-3、 摩擦止动圈 2-5、 定位套 2-7的外圈都与皮带轮毂 2-9的内圈紧压在一起； 然后， 前后两只滚 珠轴承 2-2外端面压入两只防尘垫片 2-10。 两防尘垫片 2-10的外圈与皮带轮毂 2-9的内圈压 在一起， 而其内圈与螺纹芯轴 2-1的外圈间隙配合， 或反之即两防尘垫片 2-10的外圈与皮带 轮毂 2-9的内圈间隙 (转动)配合， 而其内圈与螺纹芯轴 2-1的外圈紧配合。
装配时， 螺纹芯轴 2-1前部台阶处压入一只滚珠轴承 2-2， 滚珠轴承 2-2内端平装入一只 挡片 2-3再把弹簧摩擦离合机构套装在螺纹芯轴 2-1外面， 把弹簧摩擦离合机构内有一只摩 擦止动圈 2-5的端平面与挡片 2-3平面相贴， 螺纹芯轴 2-1中部外壁两平面 2-1-1与摩擦滑动 圈内孔两处平面 2-6-1相配合， 摩擦滑动圈 2-6外径装入一只定位套 2-7， 定位套 2-7内孔比 摩擦滑动圈 2-6外径大， 摩擦滑动圈 2-6可以在定位套 2-7内径转动。 定位套 2-7另一端平面 装上一只后挡片 2-3， 后挡片 2-3内孔装入一只定位垫片 2-8， 再把另一只滚珠轴承 2-2内孔 从螺纹芯轴 2-1后端外径压入与后档片 2-3、定位垫片 2-8平面相贴，形成一组单向离合总成。 把单向离合总成的外径与皮带轮毂 2-9的内径紧压在一起， 前后两只滚珠轴承 2-2端面压入 两只防尘垫片。
当摩擦止动圈 2-5及摩擦滑动圈 2-6的扭力旋向与摩擦弹簧 2-4的盘绕方向相反时， 摩 擦弹簧 2-4的外径就会产生扩张力， 与摩擦止动圈 2-5、 摩擦滑动圈 2-6的内径产生摩擦力而 出现锁定状态。 当摩擦止动圈 2-5、 摩擦滑动圈 2-6扭力旋向与摩擦弹簧 2-4的盘绕方向相同 时， 摩擦弹簧 2-4的外径就会变形收縮， 与摩擦止动圈 2-5、 摩擦滑动圈 2-6内径的摩擦力解 除而形成了自由状态， 由此中断动力的传递。 向摩擦弹簧 2-4内径注入高低温油脂， 使接触 部位滚动润滑， 起润滑作用。
本发明汽车发电机的单向器耦合减震皮带轮具有结构简单、使用寿命长、制造工艺简单、 制造成本低等优点。
本领域的普通技术人员应当认识到， 以上实施例仅是用来说明本发明， 而并非作为对本 发明的限定， 只要在本发明的实质范围内， 对以上所述实施例的变化、 变型都将落在本发明 的保护范围。

Claims

权 利 要 求 书
1、 弹簧摩擦制动的单向耦合减震皮带轮， 包括螺纹芯轴、 减震弹簧、 摩擦弹簧、 摩擦止 动圈、 摩擦滑动圈、 减震垫圈、 滚珠轴承、 定位套、 皮带轮毂， 螺纹芯轴伸入皮带轮毂， 两 者的两端各装配一滚珠轴承， 皮带轮毂内壁压入摩擦止动圈、 定位套， 其特征在于： 螺纹芯 轴的外径形成一凸环， 凸环朝向对侧的侧面上还具有一台阶； 与凸环相对侧的螺纹芯轴外套 减震垫圈， 减震垫圈形成一台阶； 螺纹芯轴外套减震弹簧， 减震弹簧的第一头顶于螺纹芯轴 的凸环， 且该头的端面顶于凸环的台阶处； 减震弹簧的第二头顶于减震垫圈， 且该头的端面 顶于减震垫圈的台阶处； 减震垫圈外套装摩擦滑动圈， 两者能同步转动； 摩擦弹簧套于所述 的减震弹簧之外， 摩擦弹簧的外径一头装入摩擦滑动圈的内孔处， 另一头外径装入摩擦止动 圈之内， 摩擦滑动圈的外壁与所述的定位套间隙配合； 摩擦止动圈和摩擦滑动圈的内径均比 摩擦弹簧的外径小， 增加了摩擦弹簧的弹性张力； 摩擦弹簧与摩擦止动圈、 摩擦滑动圈通过 摩擦锁定， 且摩擦弹簧与摩擦止动圈、 摩擦滑动圈能交替分离。
2、 如权利要求 1 所述的单向耦合减震皮带轮， 其特征在于： 所述螺纹芯轴的凸环顶触 减震弹簧的一侧面为螺旋面。
3、 如权利要求 1或 2所述的单向耦合减震皮带轮， 其特征在于： 所述减震垫圈顶触减 震弹簧的一侧面为螺旋面。
4、 如权利要求 1或 2所述的单向耦合减震皮带轮， 其特征在于： 所述的螺纹芯轴形成 一圈凹形卡槽； 螺纹芯轴外套垫圈， 垫圈处于减震垫圈及摩擦滑动圈的外侧面， 垫圈的外侧 面装入一四方卡簧， 四方卡簧内径卡紧于螺纹芯轴的凹形卡槽。
5、 如权利要求 1或 2所述的单向耦合减震皮带轮， 其特征在于： 所述减震垫圈的外径 与摩擦滑动圈的内壁通过两者形成相对应的平面相卡而能同步转动。
6、 如权利要求 1或 2所述的单向耦合减震皮带轮， 其特征在于： 摩擦止动圈的外端面 装入一挡圈， 挡圈与螺纹芯轴间隙配合， 与皮带轮毂的内壁压在一起。
7、 如权利要求 4所述的单向耦合减震皮带轮， 其特征在于： 定位套的外端面装入一挡 圈， 挡圈内径与垫圈外径间隙配合， 与皮带轮毂的内壁压在一起。
8、 如权利要求 1或 2所述的单向耦合减震皮带轮， 其特征在于： 滚珠轴承的外端面压 入一防尘垫片， 防尘垫片与螺纹芯轴的外径间隙配合， 与皮带轮毂的内壁压在一起。
9、 如权利要求 1或 2所述的单向耦合减震皮带轮， 其特征在于： 减震弹簧的断面呈正 方形。
10、 一种用弹簧摩擦离合的单向皮带轮， 包括螺纹芯轴、 滚珠轴承、 摩擦弹簧、 摩擦止 动圈、 定位套、 皮带轮毂， 螺纹芯轴伸入皮带轮毂， 两者的两端各装配有滚珠轴承， 摩擦止 动圈呈圆环状； 其特征在于： 设一局部呈圆环状的摩擦滑动圈， 摩擦滑动圈的另一部内折 90 度， 此部具有一个通孔， 此通孔穿过并定位连接所述的螺纹芯轴； 摩擦弹簧外套于螺纹芯轴， 两者留有间隙； 摩擦弹簧一端装入摩擦滑动圈圆环部的内孔， 另一端装入摩擦止动圈的内孔， 摩擦止动圈和摩擦滑动圈的内径都比摩擦弹簧的外径小； 摩擦止动圈的外圈与皮带轮毂的内 壁固定连接； 摩擦滑动圈的外圈间隙配合定位套， 定位套的外圈与皮带轮毂的内壁固定连接。
11、 如权利要求 10所述的单向皮带轮， 其特征在于： 摩擦滑动圈通孔的内壁形成两个 相对侧的平面； 与此相对应的， 螺纹芯轴的外壁形成两个平面， 通过两者相对应平面的贴合 而定位连接。
12、如权利要求 10或 11所述的单向皮带轮， 其特征在于： 螺纹芯轴的外壁形成台阶部， 摩擦滑动圈的内侧贴于该台阶处； 螺纹芯轴上卡接一定位垫片， 定位垫片将摩擦滑动圈的外 侧横向定位于螺纹芯轴。
13、 如权利要求 10所述的单向皮带轮， 其特征在于： 滚珠轴承内侧面装上一挡片， 挡 片的内径与螺纹芯轴的外径留有间隙， 挡片的外径与皮带轮毂的内壁固定连接。
14、 如权利要求 10或 11或 13所述的单向皮带轮， 其特征在于： 滚珠轴承的外端面压 入防尘垫片， 防尘垫片的外圈与皮带轮毂的内圈压在一起， 而其内圈与螺纹芯轴的外圈间隙 配合。
15、 如权利要求 10或 11或 13所述的单向皮带轮， 其特征在于： 滚珠轴承的外端面压 入防尘垫片， 防尘垫片的外圈与皮带轮毂的内圈转动配合， 而其内圈与螺纹芯轴的外圈紧配 合。
16、 如权利要求 10所述的单向皮带轮， 其特征在于： 摩擦弹簧内注入高低温油脂。
PCT/CN2013/082085 2013-06-13 2013-08-22 单向耦合减震皮带轮 WO2014198086A1 (zh)

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