CN111473065A - Double-ratchet one-way clutch - Google Patents

Double-ratchet one-way clutch Download PDF

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Publication number
CN111473065A
CN111473065A CN202010185917.9A CN202010185917A CN111473065A CN 111473065 A CN111473065 A CN 111473065A CN 202010185917 A CN202010185917 A CN 202010185917A CN 111473065 A CN111473065 A CN 111473065A
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CN
China
Prior art keywords
ratchet
driven
driving
tooth
way clutch
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CN202010185917.9A
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Chinese (zh)
Inventor
尹世和
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Individual
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Individual
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Priority to CN202010185917.9A priority Critical patent/CN111473065A/en
Publication of CN111473065A publication Critical patent/CN111473065A/en
Priority to PCT/CN2021/078569 priority patent/WO2021185064A1/en
Withdrawn legal-status Critical Current

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    • 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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels

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

Abstract

The invention provides a double-ratchet one-way clutch, which comprises a driving ratchet, a pawl, an elastic element, a pawl seat and a driven ratchet; one or more pawls are arranged on the pawl seat, and the elastic element is connected with the pawls; the driving ratchet wheel and the driven ratchet wheel are both connected with the pawl seat and can rotate relative to the pawl seat, and the tooth space of the driving ratchet wheel is less than or equal to the sum of the tooth top arc length of the driving ratchet wheel and the tooth top arc length of the driven ratchet wheel; when the dual ratchet one-way clutch rotates in an idling direction, the pawls move on the tooth tips of the driven ratchet and the tooth tips of the driving ratchet, reach the tooth tips of the driven ratchet before departing from the ends of the tooth tips of the driving ratchet, and reach the tooth tips of the driving ratchet before departing from the ends of the tooth tips of the driven ratchet.

Description

Double-ratchet one-way clutch
Technical Field
The invention relates to a one-way clutch, in particular to a double-ratchet one-way clutch.
Background
The ratchet clutch is one kind of one-way clutch and includes two kinds, outer meshing ratchet clutch and inner meshing ratchet clutch.
Most ratchet clutches on the market at present consist of a ratchet and a plurality of pawls, when the ratchet rotates along the direction of idling, the pawls strike the surface of the ratchet under the action of the elastic element after sliding at the tail ends of tooth tops of the ratchet, and make a sound, the abrasion between the pawls and the ratchet is increased and the service life of the elastic element is reduced in the process, the pawls strike the surface of the ratchet when the one-way clutch rotates along the direction of idling in a double-ratchet mode, and the pawls reach the tooth tops of the driven ratchet after sliding at the tail ends of the tooth tops of the driving ratchet.
The presently disclosed double-ratchet one-way clutch avoids the pawl from impacting the surface of the ratchet wheel in an axial complementary mode through the tooth tops of the driving ratchet wheel and the driven ratchet wheel, and because the types, stress and abrasion degrees of the bearings connected with the driving ratchet wheel and the driven ratchet wheel are different, the concentricity of the driving ratchet wheel and the driven ratchet wheel is difficult to guarantee for a long time, and the pawl slightly impacts the driving ratchet wheel and the driven ratchet wheel when the double-ratchet one-way clutch rotates along the idling direction.
Disclosure of Invention
The invention provides a double-ratchet one-way clutch which can be divided into two types of implementation modes of external engagement and internal engagement.
In order to achieve the purpose, the technical scheme of the invention is as follows: a double-ratchet one-way clutch comprises a driving ratchet, a pawl, an elastic element, a pawl seat and a driven ratchet;
one or more pawls are arranged on the pawl seat;
the elastic element is connected with the pawl; the number of the elastic elements is one or more;
the active ratchet wheel is connected with the pawl seat and can rotate relative to the pawl seat;
the driven ratchet wheel is connected with the pawl seat, and the driven ratchet wheel can rotate relative to the pawl seat;
when the implementation mode of the double-ratchet one-way clutch is external engagement, the pawl seat is used as an outer ring or a shell of the one-way clutch, the driving ratchet is used as an inner ring or a shaft of the one-way clutch, and the driving ratchet and the driven ratchet are both external tooth ratchets;
when the implementation mode of the double-ratchet one-way clutch is internal engagement, the pawl seat is used as an inner ring or a shaft of the one-way clutch, the driving ratchet is used as an outer ring or a shell of the one-way clutch, and the driving ratchet and the driven ratchet are both internal tooth ratchets;
the driving ratchet wheel is provided with a main coupling structure, and the driven ratchet wheel is provided with a driven coupling structure; the driving ratchet wheel drives the driven ratchet wheel to rotate through the main coupling structure and the auxiliary coupling structure by taking the pawl seat as a reference system, and the relative position of the driving ratchet wheel and the driven ratchet wheel is controlled;
the projection of the tooth top of the driving ratchet wheel on the projection plane vertical to the axial direction of the driving ratchet wheel is the tooth top arc of the driving ratchet wheel, and the length of the projection is the tooth top arc length of the driving ratchet wheel; the projection of the tooth top of the driven ratchet wheel on the projection plane vertical to the axial direction of the driven ratchet wheel is the tooth top arc of the driven ratchet wheel, and the length of the projection is the tooth top arc length of the driven ratchet wheel;
the tooth space of the driving ratchet wheel is smaller than the sum of the tooth top arc length of the driving ratchet wheel and the tooth top arc length of the driven ratchet wheel;
when the double-ratchet one-way clutch rotates in an idling direction, the pawl seat is used as a reference system, the driving ratchet rotates relative to the driven ratchet, after the tooth tops of the driven ratchet and the tooth tops of the driving ratchet are complementary in the axial direction, the driving ratchet drives the driven ratchet to rotate, the driving ratchet is used as the reference system, the pawls move on the tooth tops of the driven ratchet and the tooth tops of the driving ratchet, the pawls reach the tooth tops of the driven ratchet before leaving the tail ends of the tooth tops of the driving ratchet, and the pawls reach the tooth tops of the driving ratchet before leaving the tail ends of the tooth tops of the driven ratchet.
Furthermore, the tooth top arc of the driving ratchet wheel and the tooth top arc of the driven ratchet wheel are concentric arcs in the axial direction, and transition fillets and/or transition chamfers are arranged at two ends of the tooth top arc of the driving ratchet wheel and the tooth top arc of the driven ratchet wheel; when the double-ratchet one-way clutch rotates along an idling direction, the pawl seat is used as a reference system, after the tooth tops of the driven ratchet and the driving ratchet are complementary in the axial direction, the middle position of the tooth tops of the driven ratchet is close to or coincided with the middle position of the tooth spaces of the driving ratchet in the axial direction, and the tooth top arc of the driving ratchet is partially coincided with the tooth top arc of the driven ratchet in the axial direction.
Further, the tooth top arcs of the driving ratchet wheel and/or the tooth top arcs of the driven ratchet wheel are not concentric arcs in the axial direction; when the double-ratchet one-way clutch rotates along an idling direction, the pawl seat is used as a reference system, after the tooth tops of the driven ratchet and the driving ratchet are complementary in the axial direction, the middle position of the tooth tops of the driven ratchet and the middle position of the tooth grooves of the driving ratchet are close to or coincident in the axial direction, and the intersection point is formed between the tooth top arc of the driving ratchet and the tooth top arc of the driven ratchet in the axial direction.
Further, the main coupling structure and/or the auxiliary coupling structure may be implemented in the form of one or more structures selected from a protrusion, a groove, a positioning key, and a positioning groove, that is, the driving ratchet wheel and/or the driven ratchet wheel is provided with one or more structures selected from a protrusion, a groove, a positioning key, and a positioning groove, and the driving ratchet wheel drives the driven ratchet wheel to rotate through one or more structures selected from a protrusion, a groove, a positioning key, and a positioning groove provided on the driving ratchet wheel and/or the driven ratchet wheel, with the pawl seat as a reference system.
Furthermore, the active ratchet wheel is connected with the pawl seat through shaft hole clearance fit, a sliding bearing, a rolling bearing or a rolling body; the driven ratchet wheel is connected with the pawl seat through shaft hole clearance fit, a sliding bearing, a rolling bearing or a rolling body.
Further, a pawl wheel is arranged on the pawl; when the double-ratchet one-way clutch rotates in an idling direction, the pawl moves on tooth tops of the driving ratchet and the driven ratchet through the pawl wheel by taking the driving ratchet as a reference system.
Further, the elastic elements are parts or components for ensuring that the pawls are engaged with the driving ratchet when the double-ratchet one-way clutch rotates in the locking direction by utilizing the elastic performance of materials, and one elastic element can act on one or more pawls.
Further, the tooth space of the driving ratchet wheel is less than or equal to ninety-eight percent of the sum of the tooth top arc length of the driving ratchet wheel and the tooth top arc length of the driven ratchet wheel.
Further, the tooth space of the driving ratchet wheel is larger than or equal to one hundred and two percent of the tooth top arc length of the driving ratchet wheel.
The invention has the beneficial effects that: when the double-ratchet one-way clutch rotates in an idling direction, the pawl moves on the tooth tops of the driven ratchet and the tooth tops of the driving ratchet by taking the driving ratchet as a reference system, and the tooth space of the driving ratchet is smaller than or equal to the sum of the tooth top arc length of the driving ratchet and the tooth top arc length of the driven ratchet, so that the pawl reaches the tooth tops of the driven ratchet before leaving the tail ends of the tooth tops of the driving ratchet, and the collision degree of the pawl with the driving ratchet and the driven ratchet is reduced; the collision degree of the pawl with the driving ratchet wheel and the driven ratchet wheel is further reduced by arranging transition fillets and/or transition chamfers at two ends of the tooth top arc of the driving ratchet wheel and/or the driven ratchet wheel or by enabling the tooth top arc of the driving ratchet wheel to have an intersection point with the tooth top arc of the driven ratchet wheel in the axial direction.
Drawings
FIG. 1 is a cut-away isometric view of an outer engagement embodiment of a dual ratchet one-way clutch according to the present invention.
FIG. 2 is an exploded isometric view of an outer engagement embodiment of the proposed dual ratchet one-way clutch according to the present invention.
FIG. 3 is a partial cross-sectional schematic view of the relative positional relationship of the driving ratchet, the driven ratchet and the pawls when the outer-meshed embodiment of the dual ratchet one-way clutch proposed according to the present invention is rotated in the locked direction.
FIG. 4 is a partial cross-sectional schematic view of the relative positional relationship of the driving ratchet, the driven ratchet and the pawls when the outer-meshed embodiment of the dual-ratchet one-way clutch proposed according to the present invention is rotated in the freewheeling direction.
FIG. 5 is a cut-away isometric view of an inner mesh embodiment of a dual ratchet one-way clutch according to the present invention.
Fig. 6 is an exploded isometric view of an inner mesh embodiment of a dual ratchet one-way clutch according to the present invention.
Fig. 7 is a partial cross-sectional schematic view of the relative positional relationship of the driving ratchet, the driven ratchet and the pawls when the inter-engaging embodiment of the dual ratchet one-way clutch proposed according to the present invention is rotated in the locked direction.
Fig. 8 is a partial cross-sectional schematic view showing the relative positional relationship of the driving ratchet, the driven ratchet and the pawls when the inter-engaging embodiment of the double ratchet one-way clutch proposed according to the present invention rotates in the direction of idling.
FIG. 9 is a front partial cross-sectional view of an embodiment of an external toothing system in which the primary coupling structure is a groove and the secondary coupling structure is a protrusion, according to the present invention.
FIG. 10 is a reverse side partial cross-sectional view of an embodiment of the male engagement of a dual ratchet one-way clutch according to the present invention with the primary coupling structure being a female slot and the secondary coupling structure being a male slot.
FIG. 11 is a front partial cross-sectional view of an embodiment of an external toothing in which the primary coupling structure is a protrusion and the secondary coupling structure is a recess of a dual ratchet one-way clutch in accordance with the present invention.
FIG. 12 is a reverse side partial cross-sectional view of an embodiment of the external toothing of a dual ratchet one-way clutch according to the present invention with the primary coupling structure being a protrusion and the secondary coupling structure being a recess.
FIG. 13 is a front partial cross-sectional view of an embodiment of an outer mesh of a dual ratchet one-way clutch according to the present invention with the primary coupling structure being a detent and the secondary coupling structure being a detent key.
FIG. 14 is a reverse side partial cross-sectional view of an embodiment of an external toothing in which the primary coupling structure is a detent and the secondary coupling structure is a detent key of the dual ratchet one-way clutch according to the present invention.
FIG. 15 is a front partial cross-sectional view of an embodiment of an external toothing system in which the primary coupling structure is a detent key and the secondary coupling structure is a detent groove of a dual-ratchet one-way clutch according to the present invention.
FIG. 16 is a reverse side partial cross-sectional view of an embodiment of an external toothing system in which the primary coupling structure is a detent key and the secondary coupling structure is a detent groove of the dual ratchet one-way clutch according to the present invention.
Fig. 17 is a front partial cross-sectional schematic view of an inner gearing embodiment in which the primary coupling structure of the proposed dual ratchet one-way clutch is a groove and the secondary coupling structure is a protrusion, according to the present invention.
FIG. 18 is a reverse partial cross-sectional schematic view of an inner gearing embodiment in which the primary coupling structure of the proposed dual ratchet one-way clutch is a groove and the secondary coupling structure is a protrusion, according to the present invention.
Fig. 19 is a front partial cross-sectional schematic view of an inter-engagement embodiment in which the primary coupling structure of the proposed dual ratchet one-way clutch is a protrusion and the secondary coupling structure is a groove.
FIG. 20 is a reverse partial cross-sectional view of an inner gearing embodiment of a dual ratchet one-way clutch according to the present invention with the primary coupling structure being a lobe and the secondary coupling structure being a groove.
Fig. 21 is a front partial cross-sectional view of an inter-engagement embodiment in which the primary coupling structure of the proposed dual ratchet one-way clutch is a detent and the secondary coupling structure is a detent key.
Fig. 22 is a schematic reverse partial cross-sectional view of an inter-engagement embodiment in which the primary coupling structure of the proposed dual ratchet one-way clutch is a detent and the secondary coupling structure is a detent key.
Fig. 23 is a front partial cross-sectional view of an inter-engagement embodiment in which the primary coupling structure of the dual ratchet one-way clutch is a detent key and the secondary coupling structure is a detent groove, in accordance with the present invention.
FIG. 24 is a reverse partial cross-sectional view of an inner engagement embodiment of the dual ratchet one-way clutch according to the present invention with the primary coupling structure being a detent and the secondary coupling structure being a detent.
FIG. 25 is an axial view of the ratchet tooth shape with the top arcs of the teeth of the driving ratchet and the top arcs of the teeth of the driven ratchet being concentric arcs for an external engagement embodiment of a dual ratchet one-way clutch in accordance with the present invention.
FIG. 26 is an axial schematic view of a ratchet tooth shape in which the top arcs of the teeth of the driving ratchet wheel are concentric arcs and the top arcs of the teeth of the driven ratchet wheel are not concentric arcs, according to an external-engagement embodiment of the dual-ratchet one-way clutch of the present invention.
FIG. 27 is an axial view of the ratchet tooth shape with the top arcs of the teeth of the driving ratchet wheel being different from the concentric arc and the top arcs of the teeth of the driven ratchet wheel being concentric arc for an external engagement embodiment of a dual ratchet one-way clutch in accordance with the present invention.
FIG. 28 is an axial view of the ratchet tooth shape where the top arc of the teeth of the driving ratchet and the top arc of the teeth of the driven ratchet are not concentric arcs, according to the outer-meshing embodiment of the dual ratchet one-way clutch of the present invention.
Fig. 29 is an axial view of a ratchet shape in which the crest arcs of the teeth of the driving ratchet and the crest arcs of the teeth of the driven ratchet are concentric arcs, according to the inter-engagement embodiment of the double-ratchet one-way clutch of the present invention.
Fig. 30 is an axial view of a ratchet shape in which the top arcs of the teeth of the driving ratchet are concentric arcs and the top arcs of the teeth of the driven ratchet are not concentric arcs, according to an inter-engagement embodiment of the dual ratchet one-way clutch of the present invention.
Fig. 31 is an axial view of a ratchet shape in which the top arcs of the teeth of the driving ratchet are not concentric arcs and the top arcs of the teeth of the driven ratchet are concentric arcs, according to an inter-engagement embodiment of the dual ratchet one-way clutch of the present invention.
Fig. 32 is an axial view of a ratchet shape in which the crest arc of the teeth of the driving ratchet and the crest arc of the driven ratchet are not concentric arcs, according to the inter-engagement embodiment of the double ratchet one-way clutch proposed by the present invention.
Fig. 33 is a schematic view of a pawl with a pawl wheel disposed thereon of the pawl of the external toothing embodiment of the present invention.
Fig. 34 is a schematic view of a ratchet of an inter-meshing embodiment of the present invention, in which a ratchet wheel is provided.
The symbols in the drawings illustrate that:
1-driving ratchet wheel; 2-a pawl; 3-an elastic element; 4-pawl seat;
5-driving ratchet wheel; 6-pawl; 7-a resilient element; 8-pawl seat;
15-driven ratchet wheel; 16-convex; 17-a positioning key; 18-a groove; 19-a positioning groove; 25-a ratchet wheel;
42-driven ratchet bearing ring; 43-rolling bodies; 44-a bearing; 46-a clamp spring;
55-a driven ratchet wheel; 56-projection; 57-alignment key; 58-grooves; 59-positioning grooves; 65-a ratchet wheel;
82-driven ratchet bearing ring; 83-rolling bodies; 84-a bearing; 86-clamp spring.
Detailed Description
Various embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Fig. 1-4 show an external engagement embodiment of a dual-ratchet one-way clutch according to the present invention, which mainly comprises a driving ratchet 1, a pawl 2, an elastic element 3, a pawl seat 4, a driven ratchet 15: one or more pawls 2 are arranged on the pawl seat 4; the elastic elements 3 are connected with the pawls 2, and the number of the elastic elements 3 is one or more.
The driving ratchet 1 and the driven ratchet 15 are both connected with the pawl seat 4, can rotate relative to the pawl seat 4, and can be connected with the pawl seat 4 through shaft hole clearance fit, a sliding bearing, a rolling bearing or a rolling body; preferably, the driving ratchet 1 is connected with the pawl seat 4 through a bearing 44, and the driven ratchet 15 is connected with the pawl seat 4 through a rolling body 43; preferably, a driven ratchet bearing ring 42 is further arranged between the rolling body 43 and the pawl seat 4; one or more of a shoulder, a sleeve, a nut, a shaft end retainer, a circlip, a thrust washer, a retaining sleeve, a set screw, an end cap, a threaded ring, a snap spring, a stop ring, a screw, a weld, and an interference fit may be used to secure the bearing 44 to the driven ratchet bearing ring 42.
The pawl seat 4 is used as an outer ring or a shell of the one-way clutch, the driving ratchet 1 is used as an inner ring or a shaft of the one-way clutch, and the driving ratchet 1 and the driven ratchet 15 are both external tooth ratchets.
The elastic element 3 can act on one or more positions of the whole pawl 2, the pawl 2 on the side of the driving ratchet 1 and the pawl 2 on the side of the driven ratchet 15; the elastic element 3 is a part or component which utilizes the elastic property of the material to ensure that the pawl 2 is meshed with the active ratchet 1 when the double-ratchet one-way clutch rotates along the locking direction, and can adopt a spiral spring, a leaf spring, a coil spring, a pressure spring pipe, a corrugated pipe, a diaphragm spring, a wire spring or a special-shaped spring, one integrally-formed elastic element can act on one or more pawls 2, and preferably, each pawl 2 is connected with one elastic element 3.
The tooth space of the driving ratchet wheel 1 is smaller than the sum of the tooth top arc length of the driving ratchet wheel 1 and the tooth top arc length of the driven ratchet wheel 15; preferably, the tooth space of the driving ratchet wheel 1 is less than or equal to ninety-eight percent of the sum of the tooth top arc length of the driving ratchet wheel 1 and the tooth top arc length of the driven ratchet wheel 15; preferably, the tooth pitch of the driving ratchet 1 is greater than or equal to one hundred and two percent of the tooth top arc length of the driving ratchet 1.
The driving ratchet 1 is provided with a driving coupling structure, and the driven ratchet 15 is provided with a driven coupling structure; and with the pawl seat 4 as a reference system, the driving ratchet 1 drives the driven ratchet 15 to rotate through the main coupling structure and the auxiliary coupling structure, and controls the relative position of the driven ratchet 15.
As shown in fig. 1 and fig. 3, the external engagement embodiment of the dual-ratchet one-way clutch provided by the present invention is shown, when the dual-ratchet one-way clutch rotates in the locking direction, the driving ratchet 1 first rotates relative to the driven ratchet 15 with the pawl seat 4 as the reference system, after the tooth space of the driven ratchet 15 and the tooth space of the driving ratchet 1 are axially overlapped, the driving ratchet 1 drives the driven ratchet 15 to rotate, and at this time, the pawl 2 can be embedded with the tooth space of the driving ratchet 1; the ratchet shape of the driving ratchet 1 and the ratchet shape of the driven ratchet 15 may be the same or different.
As shown in fig. 1 and 4, in the external engagement embodiment of the dual-ratchet one-way clutch according to the present invention, when the dual-ratchet one-way clutch rotates in the idling direction, the driving ratchet 1 rotates relative to the driven ratchet 15 with the pawl seat 4 as the reference system, after the tooth tips of the driven ratchet 15 and the tooth tips of the driving ratchet 1 are complementary in the axial direction, the driving ratchet 1 drives the driven ratchet 15 to rotate, and the pawls 2 move on the tooth tips of the driven ratchet 15 and the tooth tips of the driving ratchet 1 with the driving ratchet 1 as the reference system; by making the tooth pitch of the driving ratchet 1 smaller than the sum of the tooth top arc length of the driving ratchet 1 and the tooth top arc length of the driven ratchet 15, the tooth top arc of the driving ratchet 1 and the tooth top arc of the driven ratchet 15 can have an overlap and/or intersection point in the axial direction, so that the pawl 2 reaches the tooth top of the driven ratchet 15 before leaving the end of the tooth top of the driving ratchet 1, and the pawl 2 reaches the tooth top of the driving ratchet 1 before leaving the end of the tooth top of the driven ratchet 15.
As shown in fig. 5-8, the inner gearing embodiment of the dual-ratchet one-way clutch proposed by the present invention mainly comprises a driving ratchet 5, a pawl 6, an elastic element 7, a pawl seat 8, a driven ratchet 55: one or more pawls 6 are arranged on the pawl seat 8; the elastic element 7 is connected with the pawl 6; the number of the elastic elements 7 is one or more.
The driving ratchet wheel 5 and the driven ratchet wheel 55 are both connected with the pawl seat 8, can rotate relative to the pawl seat 8, and can be connected with the pawl seat 8 through shaft hole clearance fit, a sliding bearing, a rolling bearing or a rolling body; preferably, the driving ratchet 5 is connected with the pawl seat 8 through a bearing 84, and the driven ratchet 55 is connected with the pawl seat 8 through a rolling body 83; preferably, a driven ratchet bearing ring 82 is further arranged between the rolling body 83 and the pawl seat 8; one or more of a shoulder, a sleeve, a nut, a shaft end retainer, a circlip, a thrust washer, a retaining sleeve, a set screw, an end cap, a threaded ring, a snap spring, a stop ring, a screw, a weld, and an interference fit may be used to secure the bearing 84 to the driven ratchet bearing ring 82.
The pawl seat 8 is used as an inner ring or a shaft of the one-way clutch, the driving ratchet 5 is used as an outer ring or a shell of the one-way clutch, and the driving ratchet 5 and the driven ratchet 55 are both internal tooth ratchets.
The elastic element 7 can act on one or more of the whole pawl 6, the pawl 6 on the side of the driving ratchet 5, the pawl 6 on the side of the driven ratchet 55; the elastic element 7 is a part or component for ensuring that the pawls 6 are engaged with the driving ratchet 5 when the double-ratchet one-way clutch rotates in the locking direction by using the elastic property of the material, and can adopt a spiral spring, a leaf spring, a coil spring, a pressure spring tube, a corrugated tube, a diaphragm spring, a wire spring or a special-shaped spring, and one integrally-formed elastic element can act on one or more pawls 6, preferably, each pawl 6 is connected with one elastic element 7.
The tooth space of the driving ratchet wheel 5 is smaller than the sum of the tooth top arc length of the driving ratchet wheel 5 and the tooth top arc length of the driven ratchet wheel 55; preferably, the tooth space of the driving ratchet 5 is less than or equal to ninety-eight percent of the sum of the tooth top arc length of the driving ratchet 5 and the tooth top arc length of the driven ratchet 55; preferably, the tooth pitch of the driving ratchet 5 is greater than or equal to one hundred and two percent of the tooth top arc length of the driving ratchet 5.
The driving ratchet wheel 5 is provided with a driving coupling structure, and the driven ratchet wheel 55 is provided with a driven coupling structure; taking the pawl seat 8 as a reference system, the driving ratchet 5 drives the driven ratchet 55 to rotate through the main coupling structure and the auxiliary coupling structure, and controls the relative position of the driven ratchet 55.
As shown in fig. 5 and 7, according to the external engagement embodiment of the dual-ratchet one-way clutch provided by the present invention, when the dual-ratchet one-way clutch rotates in the locking direction, the driving ratchet 5 first rotates relative to the driven ratchet 55 with the pawl seat 8 as a reference system, after the tooth spaces of the driven ratchet 55 and the tooth spaces of the driving ratchet 5 are axially overlapped, the driving ratchet 5 drives the driven ratchet 55 to rotate, and at this time, the pawl 6 can be engaged with the tooth space of the driving ratchet 5; the ratchet shape of the driving ratchet 5 may be the same as or different from that of the driven ratchet 55.
As shown in fig. 5 and 8, when the dual-ratchet one-way clutch according to the present invention is rotated in the idling direction, the driving ratchet 5 rotates relative to the driven ratchet 55 with the pawl seat 8 as the reference system, after the tooth tips of the driven ratchet 55 and the tooth tips of the driving ratchet 5 are axially complemented, the driving ratchet 5 drives the driven ratchet 55 to rotate, and the pawls 6 move on the tooth tips of the driven ratchet 55 and the tooth tips of the driving ratchet 5 with the driving ratchet 5 as the reference system; by making the tooth pitch of the driving ratchet 5 smaller than the sum of the tooth top arc length of the driving ratchet 5 and the tooth top arc length of the driven ratchet 55, the tooth top arc of the driving ratchet 5 and the tooth top arc of the driven ratchet 55 can be made to overlap and/or intersect in the axial direction, the pawl 6 reaches the tooth top of the driven ratchet 55 before departing from the end of the tooth top of the driving ratchet 5, and the pawl 2 reaches the tooth top of the driving ratchet 5 before departing from the end of the tooth top of the driven ratchet 55.
Fig. 9-10 show an external engagement embodiment in which the primary coupling structure of the dual-ratchet one-way clutch is a groove and the secondary coupling structure is a protrusion, the primary coupling structure is a groove 18, one or more grooves 18 are provided on the driving ratchet 1, the secondary coupling structure is a protrusion 16, one or more protrusions 16 are provided on the driven ratchet 15, and the driving ratchet 1 controls the relative position with the driven ratchet 15 through the protrusion 16 and the groove 18 and drives the driven ratchet 15 to rotate.
Fig. 11 to 12 show an external engagement embodiment in which the primary coupling structure of the double-ratchet one-way clutch is a protrusion and the secondary coupling structure is a groove, the primary coupling structure is a protrusion 16, one or more protrusions 16 are arranged on the driving ratchet 1, the secondary coupling structure is a groove 18, one or more grooves 18 are arranged on the driven ratchet 15, and the driving ratchet 1 controls the relative position with the driven ratchet 15 through the protrusion 16 and the groove 18 and drives the driven ratchet 15 to rotate.
Fig. 13-14 show an external engagement embodiment in which the primary coupling structure of the dual-ratchet one-way clutch is a positioning groove and the secondary coupling structure is a positioning key, the primary coupling structure is a positioning groove 19, one or more positioning grooves 19 are provided on the driving ratchet 1, the secondary coupling structure is a positioning key 17, one or more positioning keys 17 are provided on the driven ratchet 15, and the driving ratchet 1 controls the relative position with the driven ratchet 15 through the positioning keys 17 and the positioning grooves 19 and drives the driven ratchet 15 to rotate.
Fig. 15-16 show an external engagement embodiment in which the primary coupling structure of the dual-ratchet one-way clutch is a positioning key and the secondary coupling structure is a positioning slot, the primary coupling structure is a positioning key 17, one or more positioning keys 17 are disposed on the driving ratchet 1, the secondary coupling structure is a positioning slot 19, one or more positioning slots 19 are disposed on the driven ratchet 15, and the driving ratchet 1 controls the relative position with the driven ratchet 15 through the positioning keys 17 and the positioning slots 19 and drives the driven ratchet 15 to rotate.
As shown in fig. 1 and fig. 9-16, it can be easily understood that the driving ratchet 1 can be provided with one or more of the protrusions 16, the grooves 18, the positioning keys 17 and the positioning grooves 19, and the driven ratchet 15 can be provided with one or more of the protrusions 16, the grooves 18, the positioning keys 17 and the positioning grooves 19; the relative position of the driving ratchet 1 and the driven ratchet 15 is controlled by one or more structures of a bulge 16, a groove 18, a positioning key 17 and a positioning groove 19 by taking the pawl seat 4 as a reference system, and the driven ratchet 15 is driven to rotate.
Fig. 17 to 18 show an internal engagement embodiment in which the primary coupling structure of the double-ratchet one-way clutch is a groove and the secondary coupling structure is a protrusion, the primary coupling structure is a groove 58, one or more grooves 58 are provided on the driving ratchet 5, the secondary coupling structure is a protrusion 56, one or more protrusions 56 are provided on the driven ratchet 55, and the driving ratchet 5 controls the relative position with the driven ratchet 55 through the protrusion 56 and the groove 58 and drives the driven ratchet 55 to rotate.
Fig. 19 to 20 show an internal engagement embodiment in which the primary coupling structure of the double-ratchet one-way clutch is a protrusion and the secondary coupling structure is a groove, the primary coupling structure is a protrusion 56, one or more protrusions 56 are arranged on the driving ratchet 5, the secondary coupling structure is a groove 58, one or more grooves 58 are arranged on the driven ratchet 55, and the driving ratchet 5 controls the relative position with the driven ratchet 55 through the protrusion 56 and the groove 58 and drives the driven ratchet 55 to rotate.
Fig. 21-22 show an inter-engagement embodiment in which the primary coupling structure of the dual-ratchet one-way clutch is a positioning groove and the secondary coupling structure is a positioning key, the primary coupling structure is a positioning groove 59, one or more positioning grooves 59 are provided on the driving ratchet 5, the secondary coupling structure is a positioning key 57, one or more positioning keys 57 are provided on the driven ratchet 55, and the driving ratchet 5 controls the relative position with the driven ratchet 55 through the positioning keys 57 and the positioning grooves 59 and drives the driven ratchet 55 to rotate.
Fig. 23-24 show an internal engagement embodiment in which the primary coupling structure of the dual-ratchet one-way clutch is a positioning key and the secondary coupling structure is a positioning slot, the primary coupling structure is a positioning key 57, one or more positioning keys 57 are disposed on the driving ratchet 5, the secondary coupling structure is a positioning slot 59, one or more positioning slots 59 are disposed on the driven ratchet 55, and the driving ratchet 5 controls the relative position with the driven ratchet 55 through the positioning keys 57 and the positioning slots 59 and drives the driven ratchet 55 to rotate.
As shown in fig. 5 and fig. 17-24, it can be easily understood that the driving ratchet 5 can be provided with one or more of the protrusions 56, the grooves 58, the positioning keys 57 and the positioning grooves 59, and the driven ratchet 55 can be provided with one or more of the protrusions 56, the grooves 58, the positioning keys 57 and the positioning grooves 59; the relative position of the driving ratchet wheel 5 and the driven ratchet wheel 55 is controlled by one or more structures of a bulge 56, a groove 58, a positioning key 57 and a positioning groove 59 by taking the pawl seat 8 as a reference system, and the driven ratchet wheel 55 is driven to rotate.
As shown in fig. 1 and 25, the top arcs of the driving ratchet teeth and the driven ratchet teeth of the external-engagement embodiment of the dual-ratchet one-way clutch according to the present invention are both in the shape of ratchet teeth with concentric arcs in the axial direction, the top arcs of the driving ratchet 1 and the driven ratchet 15 are both concentric arcs in the axial direction, and both ends of the top arcs of the teeth of the driving ratchet 1 and the driven ratchet 15 are provided with transition fillets and/or transition chamfers, preferably, the diameter of the transition fillets and/or the length of the transition chamfers is greater than 0.1 mm; because the tooth pitch of the driving ratchet 1 is smaller than the sum of the tooth top arc length of the driving ratchet 1 and the tooth top arc length of the driven ratchet 15, when the double-ratchet one-way clutch rotates along the idling direction, the pawl seat 4 is taken as a reference system, and after the tooth top of the driven ratchet 15 is complementary with the tooth top of the driving ratchet 1 in the axial direction, the tooth top arc of the driving ratchet 1 is partially overlapped with the tooth top arc of the driven ratchet 15 in the axial direction.
As shown in fig. 1 and 26, the top arcs of the teeth of the driving ratchet wheel of the external engagement embodiment of the dual-ratchet one-way clutch according to the present invention are concentric arcs in the axial direction, the top arcs of the teeth of the driven ratchet wheel are not concentric arcs in the axial direction, the top arcs of the teeth of the driving ratchet wheel 1 are concentric arcs in the axial direction, the top arcs of the teeth of the driven ratchet wheel 15 are not concentric arcs in the axial direction, and the top arcs of the teeth of the driven ratchet wheel 15 may be curves or combinations of curves and straight lines; since the tooth pitch of the driving ratchet 1 is smaller than the sum of the tooth top arc length of the driving ratchet 1 and the tooth top arc length of the driven ratchet 15, when the double-ratchet one-way clutch rotates in the idling direction, the tooth top arc of the driving ratchet 1 and the tooth top arc of the driven ratchet 15 have an intersection point in the axial direction by taking the pawl seat 4 as a reference system, and preferably, the intersection point a and the intersection point b.
As shown in fig. 1 and 27, the top arcs of the teeth of the driving ratchet wheel of the external engagement embodiment of the dual-ratchet one-way clutch proposed by the present invention are not concentric arcs in the axial direction, the top arcs of the teeth of the driven ratchet wheel are ratchet shapes of concentric arcs in the axial direction, the top arcs of the teeth of the driving ratchet wheel 1 are not concentric arcs in the axial direction, the top arcs of the teeth of the driving ratchet wheel 1 can be curves or combinations of curves and straight lines, and the top arcs of the teeth of the driven ratchet wheel 15 are concentric arcs in the axial direction; since the tooth pitch of the driving ratchet 1 is smaller than the sum of the tooth top arc length of the driving ratchet 1 and the tooth top arc length of the driven ratchet 15, when the double-ratchet one-way clutch rotates in the idling direction, the tooth top arc of the driving ratchet 1 and the tooth top arc of the driven ratchet 15 have an intersection point in the axial direction by taking the pawl seat 4 as a reference system, and preferably, the intersection point a and the intersection point b.
As shown in fig. 1 and 28, the top arcs of the driving ratchet teeth and the driven ratchet teeth of the external-engagement embodiment of the dual-ratchet one-way clutch according to the present invention are not in the shape of ratchets with arcs of different centers in the axial direction, the top arcs of the driving ratchet 1 are not arcs of different centers in the axial direction, the top arcs of the driving ratchet 1 may be curves or combinations of curves and straight lines, the top arcs of the driven ratchet 15 are not arcs of different centers in the axial direction, and the top arcs of the driven ratchet 15 may be curves or combinations of curves and straight lines; since the tooth pitch of the driving ratchet 1 is smaller than the sum of the tooth top arc length of the driving ratchet 1 and the tooth top arc length of the driven ratchet 15, when the double-ratchet one-way clutch rotates in the idling direction, the tooth top arc of the driving ratchet 1 and the tooth top arc of the driven ratchet 15 have an intersection point in the axial direction by taking the pawl seat 4 as a reference system, and preferably, the intersection point a and the intersection point b.
As shown in fig. 5 and 29, the top arcs of the teeth of the driving ratchet and the top arcs of the teeth of the driven ratchet of the inner engagement embodiment of the dual-ratchet one-way clutch proposed by the present invention are both in the shape of ratchet teeth with concentric arcs in the axial direction, the top arcs of the teeth of the driving ratchet 5 and the driven ratchet 55 are both concentric arcs in the axial direction, and both ends of the top arcs of the teeth of the driving ratchet 5 and the driven ratchet 55 are provided with transition fillets and/or transition chamfers, preferably, the diameter of the transition fillets and/or the length of the transition chamfers is greater than 0.1 mm; since the tooth pitch of the driving ratchet 5 is smaller than the sum of the tooth top arc length of the driving ratchet 5 and the tooth top arc length of the driven ratchet 55, when the double-ratchet one-way clutch rotates in the idling direction, the tooth top arc of the driving ratchet 5 and the tooth top arc of the driven ratchet 55 are partially overlapped in the axial direction after the tooth top of the driven ratchet 55 and the tooth top of the driving ratchet 5 are axially complementary with each other by taking the pawl seat 8 as a reference system.
As shown in fig. 5 and 30, the top arcs of the teeth of the driving ratchet wheel are concentric arcs in the axial direction, and the top arcs of the teeth of the driven ratchet wheel are not concentric arcs in the axial direction, respectively, of the driving ratchet wheel 5 are concentric arcs in the axial direction, the top arcs of the teeth of the driven ratchet wheel 55 are not concentric arcs in the axial direction, and the top arcs of the teeth of the driven ratchet wheel 55 may be curves or combinations of curves and straight lines, respectively, according to the inner engagement embodiment of the dual-ratchet one-way clutch proposed by the present invention; since the tooth pitch of the driving ratchet 5 is smaller than the sum of the tooth top arc length of the driving ratchet 5 and the tooth top arc length of the driven ratchet 55, when the double-ratchet one-way clutch rotates in the idling direction, the tooth top arc of the driving ratchet 5 and the tooth top arc of the driven ratchet 55 have an intersection point in the axial direction with reference to the pawl seat 8, preferably, the intersection point c and the intersection point d.
As shown in fig. 5 and 31, the top arcs of the teeth of the driving ratchet wheel of the inner engagement embodiment of the dual-ratchet one-way clutch proposed by the present invention are not concentric arcs in the axial direction, the top arcs of the teeth of the driven ratchet wheel are ratchet shapes of concentric arcs in the axial direction, the top arcs of the teeth of the driving ratchet wheel 5 are not concentric arcs in the axial direction, the top arcs of the teeth of the driving ratchet wheel 5 can be curves or combinations of curves and straight lines, and the top arcs of the teeth of the driven ratchet wheel 55 are concentric arcs in the axial direction; since the tooth pitch of the driving ratchet 5 is smaller than the sum of the tooth top arc length of the driving ratchet 5 and the tooth top arc length of the driven ratchet 55, when the double-ratchet one-way clutch rotates in the idling direction, the tooth top arc of the driving ratchet 5 and the tooth top arc of the driven ratchet 55 have an intersection point in the axial direction with reference to the pawl seat 8, preferably, the intersection point c and the intersection point d.
As shown in fig. 5 and 32, the top arcs of the driving ratchet teeth and the top arcs of the driven ratchet teeth of the inner engagement embodiment of the dual-ratchet one-way clutch proposed by the present invention are not in the shape of ratchets with arcs of different centers in the axial direction, the top arcs of the driving ratchet 5 are not arcs of different centers in the axial direction, the top arcs of the driving ratchet 5 may be curves or combinations of curves and straight lines, the top arcs of the driven ratchet 55 are not arcs of different centers in the axial direction, and the top arcs of the driven ratchet 55 may be curves or combinations of curves and straight lines; since the tooth pitch of the driving ratchet 5 is smaller than the sum of the tooth top arc length of the driving ratchet 5 and the tooth top arc length of the driven ratchet 55, when the double-ratchet one-way clutch rotates in the idling direction, the tooth top arc of the driving ratchet 5 and the tooth top arc of the driven ratchet 55 have an intersection point in the axial direction with reference to the pawl seat 8, preferably, the intersection point c and the intersection point d.
The embodiment of the pawl 2 of the external toothing embodiment as shown in fig. 1-2 and 33 may be one or both of the pawl 2 without the pawl wheel 25 and the pawl 2 with the pawl wheel 25.
As shown in fig. 33, the pawl of the pawl wheel is provided on the pawl of the external engagement embodiment of the present invention: a pawl wheel 25 is arranged on the pawl 2; when the double-ratchet one-way clutch rotates in the idling direction, the pawl 2 moves on the tooth tops of the driven ratchet 15 and the driving ratchet 1 through the pawl wheel 25 by taking the driving ratchet 1 as a reference system.
The embodiment of the ratchet 6 of the inter-engaging example shown in fig. 5 to 6 and 34 may be one or both of the ratchet 6 not provided with the ratchet wheel 65 and the ratchet 6 provided with the ratchet wheel 65.
As shown in fig. 34, the ratchet according to the internally meshing embodiment of the present invention is provided with a ratchet wheel: the pawl 6 is provided with a pawl wheel 65; when the double-ratchet one-way clutch rotates in the idling direction, the pawls 6 move on the tooth tips of the driven ratchet 55 and the tooth tips of the driving ratchet 5 by the pawl wheel 65 with the driving ratchet 5 as a reference system.

Claims (10)

1. The utility model provides a double-ratchet one-way clutch, includes initiative ratchet, pawl, elastic element, pawl seat, driven ratchet, its characterized in that:
one or more pawls are arranged on the pawl seat;
the elastic element is connected with the pawl; the number of the elastic elements is one or more;
the active ratchet wheel is connected with the pawl seat and can rotate relative to the pawl seat;
the driven ratchet wheel is connected with the pawl seat, and the driven ratchet wheel can rotate relative to the pawl seat;
the tooth space of the driving ratchet wheel is smaller than the sum of the tooth top arc length of the driving ratchet wheel and the tooth top arc length of the driven ratchet wheel;
the driving ratchet wheel is provided with a main coupling structure, and the driven ratchet wheel is provided with a driven coupling structure; the driving ratchet wheel drives the driven ratchet wheel to rotate through the main coupling structure and the auxiliary coupling structure by taking the pawl seat as a reference system, and the relative position of the driving ratchet wheel and the driven ratchet wheel is controlled;
when the double-ratchet one-way clutch rotates in an idling direction, the pawl moves on the tooth tops of the driven ratchet and the tooth tops of the driving ratchet by taking the driving ratchet as a reference system, reaches the tooth tops of the driven ratchet before leaving the tail end of the tooth tops of the driving ratchet, and reaches the tooth tops of the driving ratchet before leaving the tail end of the tooth tops of the driven ratchet.
2. The dual ratchet one-way clutch according to claim 1, wherein the top arc of the teeth of the driving ratchet and the top arc of the teeth of the driven ratchet are concentric arcs in the axial direction, and transition fillets and/or transition chamfers are provided at both ends of the top arc of the teeth of the driving ratchet and the top arc of the teeth of the driven ratchet.
3. A dual ratchet one way clutch according to claim 1, wherein the top arcs of the teeth of said driving ratchet and/or the top arcs of the teeth of said driven ratchet are not concentric arcs in the axial direction; when the double-ratchet one-way clutch rotates along an idling direction, the pawl seat is used as a reference system, and after the tooth tops of the driven ratchet wheel and the tooth tops of the driving ratchet wheel are complementary in the axial direction, the tooth top arcs of the driving ratchet wheel and the tooth top arcs of the driven ratchet wheel have intersection points in the axial direction.
4. A dual ratchet one way clutch according to any one of claims 1 to 3, wherein said primary and/or secondary coupling formations are embodied in the form of one or more of a projection, a recess, a detent.
5. A double-ratchet one-way clutch according to any one of claims 1 to 3, wherein the driving ratchet is connected with the pawl seat through shaft hole clearance fit, a sliding bearing, a rolling bearing or a rolling body; the driven ratchet wheel is connected with the pawl seat through shaft hole clearance fit, a sliding bearing, a rolling bearing or a rolling body.
6. The double-ratchet one-way clutch according to claim 4, wherein the driving ratchet is connected with the pawl seat through shaft hole clearance fit, a sliding bearing, a rolling bearing or a rolling body; the driven ratchet wheel is connected with the pawl seat through shaft hole clearance fit, a sliding bearing, a rolling bearing or a rolling body.
7. A double-ratchet one-way clutch according to any one of claims 1 to 3, wherein a pawl wheel is provided on the pawl; when the double-ratchet one-way clutch rotates in an idling direction, the pawl moves on tooth tops of the driving ratchet and the driven ratchet through the pawl wheel by taking the driving ratchet as a reference system.
8. A dual ratchet one way clutch according to any one of claims 1 to 3 wherein said resilient element is a part or component which uses the resilient properties of the material to ensure that said pawls engage with said active ratchet when said dual ratchet one way clutch is rotated in the locking direction, one said resilient element being operable on one or more of said pawls.
9. A dual ratchet one way clutch according to any one of claims 1 to 3 wherein the tooth spacing of the driving ratchet is less than or equal to ninety-eight percent of the sum of the tooth top arc length of the driving ratchet and the tooth top arc length of the driven ratchet.
10. A dual ratchet one way clutch according to any one of claims 1 to 3 wherein the tooth spacing of the drive ratchet is greater than or equal to one hundred and two percent of the tooth tip arc length of the drive ratchet.
CN202010185917.9A 2020-03-17 2020-03-17 Double-ratchet one-way clutch Withdrawn CN111473065A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202010185917.9A CN111473065A (en) 2020-03-17 2020-03-17 Double-ratchet one-way clutch
PCT/CN2021/078569 WO2021185064A1 (en) 2020-03-17 2021-03-02 Double-ratchet one-way clutch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010185917.9A CN111473065A (en) 2020-03-17 2020-03-17 Double-ratchet one-way clutch

Publications (1)

Publication Number Publication Date
CN111473065A true CN111473065A (en) 2020-07-31

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Family Applications (1)

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CN202010185917.9A Withdrawn CN111473065A (en) 2020-03-17 2020-03-17 Double-ratchet one-way clutch

Country Status (1)

Country Link
CN (1) CN111473065A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021185064A1 (en) * 2020-03-17 2021-09-23 尹世和 Double-ratchet one-way clutch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021185064A1 (en) * 2020-03-17 2021-09-23 尹世和 Double-ratchet one-way clutch

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Application publication date: 20200731