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
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D41/00—Freewheels or freewheel clutches
  • F16D41/12—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
• • 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
  • F16D11/00—Clutches in which the members have interengaging parts
  • F16D11/02—Clutches in which the members have interengaging parts disengaged by a contact of a part mounted on the clutch with a stationarily-mounted member
• • 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
  • F16D41/02—Freewheels or freewheel clutches disengaged by contact of a part of or on the freewheel or freewheel clutch with a stationarily-mounted member

Definitions

• the invention relates to a pawl freewheel, with the help of either a torque transmission can be permitted or interrupted, for example, for selectively connecting an electric machine to a drive train of a motor vehicle.
• a known pawl freewheel 10 illustrated in FIG. 1 has an inner ring 12 and a relatively rotatable outer ring 14 arranged coaxially to the inner ring 12.
• the inner ring 12 has a transverse bore 16 extending in the radial direction, which is opened laterally.
• a laterally protruding ball head 20 of a pawl 22 is inserted into the transverse bore 16 which forms a receiving pocket 18, so that the pawl 22 between the illustrated blocking position, in which the pawl 22 rotates into a locking recess 24 of the outer ring 14 during a relative rotation in a first circumferential direction engages, and a freewheeling position in which the pawl 22 is pressed in a relative rotation in a first circumferential direction opposite second circumferential direction against the spring force of a support spring 26 from the locking recess 24 of the outer ring 14, can be pivoted and not under the influence of centrifugal force from the Receiving pocket 18 comes out.
• a pawl freewheel for blocking or interrupting a torque transmission, in particular for selectively connecting an electrical machine to a drive train of a motor vehicle, provided with a first ring for initiating and / or discharging a torque, coaxially arranged to the first ring second ring for discharging and / or introducing the torque, at least one between ner blocking position and a freewheeling position pivotable pawl, wherein the pawl locks in the blocking position the first ring with the second ring for torque transmission and in the freewheeling position allows relative rotation of the first ring to the second ring to interrupt the torque transmission, one connected to the first ring and on the pawl with a spring force acting support spring for moving the pawl into the blocking position and a holding ring connected to the first ring for forming a Aufnah metasche for pivotally receiving and supporting the pawl, wherein the receiving pocket is formed between the first ring and the holding element.
• the receiving pocket which pivots the pawl even under the influence of centrifugal force, is not formed in one piece by the first ring but in two pieces by the first ring and the retaining element.
• undercuts in the first ring which would have to be produced, for example, by transverse boring or complicated milling, can be avoided.
• the first ring can be made simpler and cheaper to manufacture.
• the first ring can be designed in several parts by means of the holding element, thereby forming a suitably shaped undercut in the assembled state to form the receiving metasche. Due to the assembled by the first ring and the retaining element receiving pocket, it is not necessary in the first ring, for example, formed by transverse bores undercuts for pivotally receiving the pawl, so that the manufacturing cost of the first ring can be lowered, whereby a cost-effective pawl freewheel is enabled ,
• the first ring may be configured as an inner ring, while the second ring is configured as an outer ring.
• the first ring may be configured as an outer ring, while the second ring is configured as an inner ring.
• a plurality of pawls are provided, which are preferably distributed uniformly in the circumferential direction.
• the pawl freewheel is designed in particular switchable.
• a relative to the first ring rotatable Umschaltkarfig be provided.
• the switchover cage can be spaced apart from the pawl in a neutral position and can provide pivoting movement. Allow the pawl between the locked position and the freewheeling position.
• the Umschalthanfig press in a first switching position, the pawl in the freewheeling position and / or lock the pawl in the blocking position in a second switching position.
• a first pawl which locks in a relative rotation in a first circumferential direction, and a second pawl which locks in a relative rotation in a direction opposite to the first circumferential direction second circumferential direction are provided.
• both the first pawl and the second pawl or only the first pawl or only the second pawl are designed switchable.
• first pawl and the second pawl are each provided in pairs and may preferably be pressed in the respective freewheeling position in a common receiving recess of the first ring.
• the support spring in the blocking position, can press the pawl against one side of the receiving pocket, wherein the support spring preferably presses the pawl against the retaining element.
• the second ring has a locking recess into which the pawl can be pressed by the support spring in the locked position to transmit torque between the first ring and the second ring. In the blocking position, the pawl may in particular be positively clamped between the first ring and the second ring.
• the holding element is arranged in particular in the radial direction between the first ring and the second ring.
• the holding element has, in particular, a centering means with which the holding element can be connected in a defined angular position with the first ring.
• the holding element as centering on a radially projecting lug, which can engage in a corresponding recess of the first ring, whereby a centering in a defined relative angular position and / or a positive connection with the first ring can be achieved.
• the support spring may in particular be designed as a projecting elastically bendable spring plate, which preferably bears substantially in the tangential direction with a particular rounded end bent to the pawl between the freewheeling position and the locking position with a spring force.
• the pawl freewheel can be provided in particular in a coupled to a drive shaft of a motor vehicle engine pulley, in particular for driving KraftGermannebenaggregaten and / or for connecting a preferably designed as a starter generator starter for starting the motor vehicle engine, to couple the pulley on the pawl freewheel with the drive shaft.
• an electric machine can be coupled to a drive train of a motor vehicle via the belt pulley.
• the first ring has a side surface facing the second ring, wherein all surface normals of the side surface point away from the first ring.
• the first ring can be configured free of undercuts. When the first ring is configured as an inner ring, the side surface is formed by the radial outer side.
• the side surface is formed by the radial inner side.
• the expression according to which all surface normal of the side surface facing away from the first ring is to be understood such that the surface normal does not hit the first ring up to a center of rotation through which an axis of rotation of the pawl freewheel passes.
• the side surface is strictly circular cylindrical or circular cylindrical with at least one recessed in the radial direction receiving recess for receiving the pawl in the freewheeling position is formed.
• the side surface can be made in particular exclusively by turning cost.
• a large part of the torque to be transmitted can be removed from the holding element in the blocking position and transferred to the first ring via the attachment of the holding element with the first ring.
• the shape of the first ring is based only on a rotationally symmetrical body, in which the receiving recess is machined, for example, after a rotation of the first ring chipless or machined in the side surface.
• the pawl may be positioned in the freewheeling position to a greater extent in the receiving recess than in the blocking position.
• the receiving pocket has a support wall formed only by the first ring for removing the torque transmitted via the pawl in the blocking position.
• the torque transmission in the blocking position is thereby carried past the retaining element.
• the holding element therefore only needs to be designed to retain the pawl even under the influence of centrifugal force.
• the retaining element since the retaining element essentially only needs to remove the centrifugal forces acting on the pawl and the spring force of the supporting spring acting on the pawl, the retaining element can be designed correspondingly inexpensively.
• a designed for lower forces cost attachment is possible between the holding element and the first ring.
• the support wall formed by the first ring can be effective in particular substantially until the transition of the receiving pocket in the holding element for the transmission of forces.
• the retaining element is clamped or glued to the first ring.
• the retaining element transmits only to a small extent, if at all, the torque to be transmitted in the blocking position, such a cost-effective fastening of the retaining element to the first ring is sufficient.
• the holding element is made of a plastic material, in particular PE, PEEK or ABS.
• the holding element can be produced inexpensively, for example by plastic injection molding, and have sufficient strength during operation.
• the holding element has a receiving pocket limiting
• the pawl Due to the retaining bevels, the pawl can also be retained under the influence of centrifugal force in the free-running position, so that the pawl is held securely in the receiving pocket, in particular in interaction with the support spring.
• the pawl has a flat top facing a portion in a first circumferential direction and a planar underside facing a portion in a second circumferential direction opposing the first circumferential direction, wherein the maximum thickness of the pawl corresponds to the distance of the top to the bottom.
• the pawl may be configured, for example, as a flat plate, wherein preferably an end face facing the first ring and / or an end facing the second ring may be rounded.
• the pawl is designed in particular without a ball head and / or without any other protruding parts.
• the pawl is characterized particularly simple and inexpensive, whereby the manufacturing cost of the pawl freewheel can be further reduced.
• the holding element is designed substantially annular, wherein in particular the support spring between the first ring and the holding element is fixed.
• the retaining element can be configured as a solid ring or a partial ring, for example, the retaining element can be clipped onto the first ring configured as an inner ring as a partial ring or clipped onto the first ring configured as an outer ring.
• the support spring is clamped between the retaining element and the first ring.
• the support spring may in particular be designed as a projecting elastically bendable spring plate, which preferably protrudes substantially in the tangential direction between the holding element and the first ring to rest in particular with a rounded end bent to the pawl between the freewheeling position and the blocking position with a spring force.
• Fig. 1 is a schematic sectional view of a previously known pawl freewheel
• FIG. 2 shows a schematic sectional view of a pawl freewheel according to the invention.
• the pawl freewheel 10 has an inner ring 12 as the first ring and a relatively rotatable outer ring 14 arranged coaxially with the inner ring 12 as a second ring.
• a holding element 28 is connected, which forms a receiving pocket 18 together with the inner ring 12, in which a designed as a flat sheet with a suitable thickness between a top 30 and a bottom 32 pawl 22 is pivotally inserted.
• the pawl 22 from a freewheeling position in which the pawl 22 is used with a larger proportion in a receiving recess 34, are automatically pivoted into the illustrated blocking position in which the pawl 22 is inserted in a locking recess 24 of the outer ring 14.
• the outer ring 14 on the outer side 30 of the pawl 22 slide off, whereby the pawl 22 always comes out of the locking recess 24 out and in the freewheeling position is pressed, so that the inner ring 12 can overtake the outer ring 14.
• the pawl 22 may abut within the locking recess 24 in the locking position on the outer ring 14, whereby the rotational speed of the outer ring 14 corresponds to the speed of the inner ring 12.
• the pawl 22 In the blocking position, the pawl 22 can be supported on a support wall 36 formed only by the inner ring 12, so that the holding element 28 does not have to transmit any torque between the outer ring 14 and the inner ring 12.
• the holding element 28 can only fulfill the function of preventing the pawl 22 from escaping from the receiving pocket 18 under the influence of centrifugal force.
• the holding element 28 made of plastic may have a retaining bevel 38 delimiting the receiving pocket 18, against which the upper side 30 of the locking pawl 22 may abut in a defined relative angular position to the inner ring 12 in the locking position.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)

Priority Applications (3)

Applications Claiming Priority (4)

Publications (1)

Family

ID=51392030

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Citations (4)

Family Cites Families (2)

• 2014
  • 2014-07-25 CN CN201480045230.8A patent/CN105518327B/zh active Active
  • 2014-07-25 DE DE102014214631.3A patent/DE102014214631A1/de not_active Withdrawn
  • 2014-07-25 WO PCT/DE2014/200356 patent/WO2015021975A1/de active Application Filing
  • 2014-07-25 DE DE112014003745.1T patent/DE112014003745B4/de active Active
  • 2014-07-25 KR KR1020167006408A patent/KR102244277B1/ko active IP Right Grant

Patent Citations (4)

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