CN113883239B - Passive clutch with double reduction ratios - Google Patents
Passive clutch with double reduction ratios Download PDFInfo
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- CN113883239B CN113883239B CN202111215880.0A CN202111215880A CN113883239B CN 113883239 B CN113883239 B CN 113883239B CN 202111215880 A CN202111215880 A CN 202111215880A CN 113883239 B CN113883239 B CN 113883239B
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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
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
- F16H3/22—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially
- F16H3/30—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial
- F16H3/32—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial and an additional shaft
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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
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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
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/002—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having teeth movable out of mesh
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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
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/003—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion the gear-ratio being changed by inversion of torque direction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
A clutch with passive double reduction ratios relates to the technical field of clutches. The invention aims to solve the problems of heavy weight, large volume and special controller and driver of the existing clutch. The motor is fixedly connected to a supporting plate, a driving gear is fixedly connected to a motor shaft of the motor, a first transition gear and a second transition gear are fixedly connected to a driving ratchet wheel, the driving gear is meshed with the first transition gear, the driving ratchet wheel is arranged between a first driven ratchet wheel and a second driven ratchet wheel, the driving ratchet wheel is sleeved on a transition shaft and can axially reciprocate along the transition shaft under the pushing of the first driven ratchet wheel and the second driven ratchet wheel, the first driven gear and the second driven gear are fixedly connected to an output shaft, the first transition gear can be meshed with the first driven gear, and the second transition gear can be meshed with the second driven gear. The invention is used for switching the transmission path and the reduction ratio.
Description
Technical Field
The invention relates to the technical field of clutches, in particular to a passive clutch with double reduction ratios.
Background
With the development of robotics and unmanned aerial vehicle technologies, lighter and smaller driving and transmission mechanisms are required to perform more complex tasks. For example, the robot end effector performs an opening and closing capturing action, the unmanned aerial vehicle performs a pulling and lowering recovery action, and the actuating element is required to output different speeds, forces or moments in different movement directions. At present, a common clutch or speed reducer on an automation device is switched by adopting an active clutch to realize reduction ratio, wherein the active clutch is generally composed of components such as an electromagnet, a shifting fork, a gear and the like, and has the defects of large volume, large weight and high power. Greatly limits the miniaturization and light weight development of advanced automation systems such as robots, unmanned aerial vehicles and the like. Therefore, a novel clutch with a positive and negative rotation double reduction ratio needs to be developed, which is small, light and passive, and provides technical support for the fine development of automatic equipment.
Disclosure of Invention
The invention aims to solve the problems of heavy weight, large volume and special controller and driver of the existing clutch, and further provides a passive double-reduction-ratio clutch which realizes output switching of two reduction ratios by means of self power.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a clutch of passive two reduction ratios, including the driving gear, a motor, first transition gear, the second transition gear, first passive ratchet, the second passive ratchet, first driven gear, the second driven gear, the output shaft, the driving ratchet, first one-way bearing, second one-way bearing and transition axle, the motor rigid coupling is in the backup pad, the rigid coupling has the driving gear on the motor shaft of motor, first transition gear and second transition gear rigid coupling are on the driving ratchet, the driving gear meshes with first transition gear, first passive ratchet passes through first one-way bearing and sets up in first bearing frame, second passive ratchet passes through the second one-way bearing and sets up in the second bearing frame, the driving ratchet sets up between first passive ratchet and second passive ratchet, the driving ratchet suit is on the transition axle, and can do axial reciprocating motion along the transition axle under the promotion of first passive ratchet and second passive ratchet, first driven gear and second driven gear rigid coupling are on the output shaft, first transition gear meshes with first driven gear, second transition gear meshes with second driven gear mutually.
Further, the two end faces of the driving ratchet wheel are both provided with driving ratchet wheel tooth-shaped faces, the first driven ratchet wheel is sleeved at one end of the transition shaft, the inner side end face of the first driven ratchet wheel is provided with a first driven ratchet wheel tooth-shaped face, the inner ring of the first one-way bearing is fixedly connected to the first driven ratchet wheel in a sleeved mode, the outer ring of the first one-way bearing is fixedly connected to the first bearing seat, the end portion of one end of the transition shaft is rotationally connected with the first bearing seat through the first rolling bearing, the second driven ratchet wheel is sleeved at the other end of the transition shaft, the inner side end face of the second driven ratchet wheel is provided with a second driven ratchet wheel tooth-shaped face, the inner ring of the second one-way bearing is fixedly connected to the second driven ratchet wheel in a sleeved mode, the outer ring of the second one-way bearing is fixedly connected to the second bearing seat, and the end portion of the other end of the transition shaft is rotationally connected with the second bearing seat through the first rolling bearing.
Further, the active ratchet tooth surface at one end of the active ratchet is matched with the first passive ratchet tooth surface of the first passive ratchet, and the active ratchet tooth surface at the other end of the active ratchet is matched with the second passive ratchet tooth surface of the second passive ratchet.
Further, when the driving ratchet wheel moves along the transition shaft to be close to the first driven ratchet wheel, the driving ratchet wheel tooth surface at one end of the driving ratchet wheel is contacted with the first driven ratchet wheel tooth surface of the first driven ratchet wheel, the driving ratchet wheel tooth surface at the other end of the driving ratchet wheel is separated from the second driven ratchet wheel tooth surface of the second driven ratchet wheel, the first transition gear is meshed with the first driven gear, and the second transition gear is separated from the second driven gear; when the driving ratchet wheel moves to be close to the second driven ratchet wheel along the transition shaft, the driving ratchet wheel tooth surface at one end of the driving ratchet wheel is separated from the first driven ratchet wheel tooth surface of the first driven ratchet wheel, the driving ratchet wheel tooth surface at the other end of the driving ratchet wheel is contacted with the second driven ratchet wheel tooth surface of the second driven ratchet wheel, the first transition gear is separated from the first driven gear, and the second transition gear is meshed with the second driven gear.
Further, the tooth-shaped surfaces of the driving ratchet wheels at two ends of the driving ratchet wheel are double spiral inclined surfaces, and the tooth-shaped surfaces of the first driven ratchet wheel and the tooth-shaped surfaces of the second driven ratchet wheel are double spiral inclined surfaces.
Further, a gap is arranged between the first passive ratchet wheel and the transition shaft and between the second passive ratchet wheel and the transition shaft.
Further, the rotation directions of the first unidirectional bearing and the second unidirectional bearing are opposite.
Further, a motor shaft, a transition shaft and an output shaft of the motor are all arranged in parallel, and the transition shaft is arranged between the motor shaft and the output shaft of the motor.
Further, a plurality of mounting grooves are formed in the inner circumferential side wall of the driving ratchet wheel along the circumferential direction, each mounting groove is respectively arranged along the radial direction, a positioning steel ball is respectively arranged in each mounting groove, a spring is arranged between each positioning steel ball and the bottom of each mounting groove, two annular grooves are formed in the outer circumferential side wall of the transition shaft in parallel along the axial direction, the two annular grooves are adjacently arranged, and the outer parts of the positioning steel balls are pressed into one annular groove under the elastic action of the spring.
Further, groove walls on two sides of the annular groove are obliquely arranged from the groove opening to the groove bottom to the inner side.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts parts such as a one-way bearing, a ratchet wheel and the like, utilizes the driving gear as a clutch power source, realizes the clutch of a transmission path by the forward and reverse rotation switching of the driving gear, and has low power consumption and high efficiency.
2. The invention has two sets of transmission paths, two reduction ratios and the forward and reverse rotation of the driving shaft or the driving gear can be switched to different transmission paths, so that different rotation speeds can be output under the condition of a certain input rotation speed.
3. Compact structure, high integration level, simple control, no need of special clutch controller and driving device, and can realize the output of positive and negative rotation double reduction ratios.
4. The clutch has the advantages of low manufacturing cost and safe and reliable use, and can be used in the fields of robots and unmanned aerial vehicles and can be popularized to other application fields of mechanical transmission.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an isometric view of the first passive ratchet 5-1 or the second passive ratchet 5-2 of the present invention.
Detailed Description
The first embodiment is as follows: referring to fig. 1 to 2, the clutch with a passive double reduction ratio in this embodiment includes a driving gear 1, a motor 2, a first transition gear 3-1, a second transition gear 3-2, a first driven ratchet 5-1, a second driven ratchet 5-2, a first driven gear 7-1, a second driven gear 7-2, an output shaft 8, a driving ratchet 9, a first one-way bearing 10-1, a second one-way bearing 10-2, and a transition shaft 11, wherein the motor 2 is fixedly connected to a supporting plate, the driving gear 1 is fixedly connected to a motor shaft of the motor 2, the first transition gear 3-1 and the second transition gear 3-2 are fixedly connected to the driving ratchet 9, the driving gear 1 is meshed with the first transition gear 3-1, the first driven ratchet 5-1 is disposed in a first bearing seat 12-1 through the first one-way bearing 10-1, the second driven ratchet 5-2 is disposed in a second bearing seat 12-2 through the second one-way bearing 10-2, the driving ratchet 9 is disposed between the first driven ratchet 5-1 and the second driven gear 5-2, the driven gear 7-2 is movably sleeved on the first driven gear 2 and the driven gear 7-2, and the driven gear 7-2 is movably meshed with the first driven gear 2 and the driven gear 2, and the driven gear 7-2 is movably sleeved on the first driven gear 2 and the driven gear 2-1 and the second driven gear 2.
The first bearing seat 12-1 and the second bearing seat 12-2 are fixedly connected on the supporting plate.
The two ends of the output shaft 8 are respectively connected with the supporting plate in a rotating way through a second rolling bearing 14.
The pitch circle diameter of the first transition gear 3-1 is larger than that of the second transition gear 3-2, the pitch circle diameter of the first driven gear 7-1 is smaller than that of the second driven gear 7-2, and the distance between the first transition gear 3-1 and the second transition gear 3-2 is smaller than that between the first driven gear 7-1 and the second driven gear 7-2.
The forward and reverse rotation double-reduction-ratio clutch provided by the invention consists of parts such as a one-way bearing, a gear, a spiral shaft, a spring, a steel ball and the like, and has the characteristics of simple and ingenious structure, small volume, light weight and no energy consumption.
The invention designs a special ratchet mechanism by utilizing the characteristic that the inner ring of the unidirectional bearing can only rotate in one direction relative to the outer ring, and changes the forward and reverse rotation of the driving wheel into the axial movement of the clutch sleeve of the clutch, so as to realize the switching of different driven gears and the output of different reduction ratios of forward and reverse rotation.
The clutch power source of the invention rotates from the driving shaft, a controller is not used, and the reduction ratio switching can be realized without consuming power.
The clutch of the invention has different output torque and rotation speed at the output end when the input end of the clutch is positively and negatively rotated.
The clutch of the invention uses the unidirectional bearing to realize the switching of gear engagement.
The clutch of the invention uses the active and passive ratchet wheels, and realizes the gear switching action of changing rotation into axial translation.
In this embodiment, the motor 2 is a forward/reverse motor.
In this embodiment, the driving ratchet 9 and the transition shaft 11 are rotated synchronously.
The motor 2 is arranged on the supporting plate, and the motor shaft is provided with a driving gear 1 which can rotate positively and negatively along with the motor 2; the first transition gear 3-1 and the second transition gear 3-2 have different reference circles and are fixedly connected to the driving ratchet wheel 9, and the driving ratchet wheel 9 is sleeved on the transition shaft 11 and can slide and rotate freely along the axial direction; the positioning steel ball 4 and the spring 6 are arranged on the driving ratchet wheel 9 and are matched with two annular grooves 1101 on the transition shaft 11, so that the driving ratchet wheel 9 is positioned at two transmission positions on the transition shaft 11; the first driven gear 7-1 and the second driven gear 7-2 are arranged on the output shaft 8 and have different reference circles, and can be respectively meshed with the first transition gear 3-1 and the second transition gear 3-2 to obtain different reduction ratios; the outer ring of the first one-way bearing 10-1 is connected with the first bearing seat 12-1 through a key, the inner ring is connected with the first driven ratchet wheel 5-1 through a key, the first one-way bearing can rotate only when the first driven ratchet wheel 5-1 turns specifically, the outer ring of the second one-way bearing 10-2 is connected with the second bearing seat 12-2 through a key, the inner ring is connected with the second driven ratchet wheel 5-2 through a key, and the second one-way bearing can rotate only when the second driven ratchet wheel 5-2 turns specifically; the first transition gear 3-1 on the driving ratchet wheel 9 is always meshed with the driving gear 1, so that the motor output torque is transmitted to the driving ratchet wheel 9 through the driving gear 1, and the driving ratchet wheel 9 rotates on the transition shaft 11 and is pushed by the first driven ratchet wheel 5-1 and the second driven ratchet wheel 5-2 to axially translate on the transition shaft 11.
The second embodiment is as follows: referring to fig. 1-2, in this embodiment, two end surfaces of the driving ratchet 9 are provided with driving ratchet tooth-shaped surfaces, the first driven ratchet 5-1 is sleeved at one end of the transition shaft 11, the inner end surface of the first driven ratchet 5-1 is provided with a first driven ratchet tooth-shaped surface, the inner ring of the first unidirectional bearing 10-1 is fixedly connected to the first driven ratchet 5-1 in a sleeved manner, the outer ring of the first unidirectional bearing 10-1 is fixedly connected to the first bearing seat 12-1, the end part of one end of the transition shaft 11 is rotatably connected with the first bearing seat through a first rolling bearing 13, the second driven ratchet 5-2 is sleeved at the other end of the transition shaft 11, the inner end surface of the second driven ratchet 5-2 is provided with a second driven ratchet tooth-shaped surface, the inner ring of the second unidirectional bearing 10-2 is fixedly connected to the second driven ratchet 5-2 in a sleeved manner, the outer ring of the second unidirectional bearing 10-2 is fixedly connected to the second bearing seat 12-2, and the end part of the other end of the transition shaft 11 is rotatably connected with the second bearing seat through a first rolling bearing 13. Other compositions and connection modes are the same as in the first embodiment.
And a third specific embodiment: in the present embodiment, the active ratchet tooth surface at one end of the active ratchet 9 is matched with the first passive ratchet tooth surface of the first passive ratchet 5-1, and the active ratchet tooth surface at the other end of the active ratchet 9 is matched with the second passive ratchet tooth surface of the second passive ratchet 5-2, as described with reference to fig. 1 to 2. Other compositions and connection modes are the same as those of the second embodiment.
The specific embodiment IV is as follows: 1-2, when the driving ratchet wheel 9 moves along the transition shaft 11 to approach the first driven ratchet wheel 5-1, the driving ratchet tooth surface at one end of the driving ratchet wheel 9 contacts with the first driven ratchet tooth surface of the first driven ratchet wheel 5-1, the driving ratchet tooth surface at the other end of the driving ratchet wheel 9 is separated from the second driven ratchet tooth surface of the second driven ratchet wheel 5-2, the first transition gear 3-1 is meshed with the first driven gear 7-1, and the second transition gear 3-2 is separated from the second driven gear 7-2; when the driving ratchet wheel 9 moves along the transition shaft 11 to approach the second driven ratchet wheel 5-2, the driving ratchet tooth surface at one end of the driving ratchet wheel 9 is separated from the first driven ratchet tooth surface of the first driven ratchet wheel 5-1, the driving ratchet tooth surface at the other end of the driving ratchet wheel 9 is contacted with the second driven ratchet tooth surface of the second driven ratchet wheel 5-2, the first transition gear 3-1 is separated from the first driven gear 7-1, and the second transition gear 3-2 is meshed with the second driven gear 7-2. Other compositions and connection modes are the same as those of the third embodiment.
Fifth embodiment: in the present embodiment, the driving ratchet tooth surfaces at two ends of the driving ratchet 9 are both double spiral inclined surfaces, and the first driven ratchet tooth surface of the first driven ratchet 5-1 and the second driven ratchet tooth surface of the second driven ratchet 5-2 are both double spiral inclined surfaces, as described in reference to fig. 1 to 2. Other compositions and connection modes are the same as those of the fourth embodiment.
In this embodiment, the double spiral bevel includes two spiral bevels symmetrical along the center.
Specific embodiment six: the present embodiment is described with reference to fig. 1 to 2, in which a gap is provided between the transition shaft 11 and the first and second passive ratchet wheels 5-1 and 5-2. Other compositions and connection modes are the same as those of the second embodiment.
Seventh embodiment: the present embodiment is described with reference to fig. 1 to 2, in which the rotation directions of the first one-way bearing 10-1 and the second one-way bearing 10-2 are opposite to each other. Other compositions and connection modes are the same as in the first embodiment.
Eighth embodiment: the present embodiment is described with reference to fig. 1 to 2, in which the motor shaft of the motor 2, the transition shaft 11, and the output shaft 8 are all disposed in parallel, and the transition shaft 11 is disposed between the motor shaft of the motor 2 and the output shaft 8. Other compositions and connection modes are the same as in the first embodiment.
Detailed description nine: referring to fig. 1 to 2, in this embodiment, a plurality of mounting grooves 901 are formed in the inner circumferential side wall of the driving ratchet 9 along the circumferential direction, each mounting groove 901 is respectively formed in the radial direction, a positioning steel ball 4 is respectively formed in each mounting groove 901, a spring 6 is arranged between each positioning steel ball 4 and the bottom of each mounting groove 901, two annular grooves 1101 are formed in the outer circumferential side wall of the transition shaft 11 in parallel along the axial direction, the two annular grooves 1101 are adjacently arranged, and the outer portion of each positioning steel ball 4 is pressed into one annular groove 1101 under the action of the elastic force of the spring 6. Other compositions and connection modes are the same as those of the first, second, third, fourth, fifth, sixth, seventh or eighth embodiments.
The transition shaft 11 is clamped in the circumferential direction through the positioning steel balls 4, so that the synchronous rotation of the driving ratchet wheel 9 and the transition shaft 11 is realized, and when the driving ratchet wheel is pushed by the first driven ratchet wheel 5-1 and the second driven ratchet wheel 5-2, the positioning steel balls 4 slide out of the current annular groove 1101 and move into the other annular groove 1101, so that the positioning of the driving ratchet wheel 9 at two transmission positions on the transition shaft 11 is realized.
Detailed description ten: the present embodiment will be described with reference to fig. 1 to 2, in which groove walls on both sides of the annular groove 1101 are inclined inward from the groove opening to the groove bottom. Other compositions and connection manners are the same as those of the embodiment nine.
The movement of the positioning steel ball 4 is facilitated by such design.
Principle of operation
The first passive ratchet wheel 5-1 and the second passive ratchet wheel 5-2 have complex end surface geometries, two spiral inclined surfaces are used as working surfaces, and two end surfaces of the driving ratchet wheel 9 are spiral inclined surfaces matched with the first passive ratchet wheel 5-1 and the second passive ratchet wheel 5-2. When the driving ratchet wheel 9 rotates clockwise as shown in the condition of fig. 1, the first one-way bearing 10-1 can rotate, the driving ratchet wheel 9 drives the first driven ratchet wheel 5-1 to rotate, the second one-way bearing 10-2 cannot rotate, the second driven ratchet wheel 5-2 is not moved, the first transition gear 3-1 arranged on the driving ratchet wheel 9 is meshed with the first driven gear 7-1, and the second transition gear 3-2 is separated from the second driven gear 7-2; when the driving ratchet wheel 9 rotates anticlockwise as in the case of fig. 1, since the first unidirectional bearing 10-1 cannot rotate in the direction, the first driven ratchet wheel 5-1 cannot rotate, the driving ratchet wheel 9 moves axially under the action of the double spiral inclined surface of the first driven ratchet wheel 5-1, the first transition gear 3-1 and the second transition gear 3-2 mounted on the driving ratchet wheel 9 move together, the first transition gear 3-1 is separated from the first driven gear 7-1, the second transition gear 3-2 is meshed with the second driven gear 7-2, the driving ratchet wheel 9 is separated from the first driven ratchet wheel 5-1 and meshed with the second driven ratchet wheel 5-2 at the other end, the second unidirectional bearing 10-2 can rotate, and the driving ratchet wheel 9 drives the second driven ratchet wheel 5-2 to rotate. Similarly, when the driving ratchet 9 rotates clockwise again, the driving ratchet 9 and the upper first and second transition gears 3-1 and 3-2 are pushed back again by the second driven ratchet 5-2. Therefore, the clutch is automatically switched to different rotation output paths according to different rotation directions of the driving gear 1, and the forward and reverse rotation double reduction ratio output is realized.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
Claims (8)
1. A passive dual reduction ratio clutch, characterized by: the device comprises a driving gear (1), a motor (2), a first transition gear (3-1), a second transition gear (3-2), a first driven ratchet wheel (5-1), a second driven ratchet wheel (5-2), a first driven gear (7-1), a second driven gear (7-2), an output shaft (8), a driving ratchet wheel (9), a first one-way bearing (10-1), a second one-way bearing (10-2) and a transition shaft (11), wherein the motor (2) is fixedly connected on a supporting plate, the driving gear (1) is fixedly connected on a motor shaft of the motor (2), the first transition gear (3-1) and the second transition gear (3-2) are fixedly connected on the driving ratchet wheel (9), the driving gear (1) is meshed with the first transition gear (3-1), the first driven ratchet wheel (5-1) is arranged in a first bearing seat (12-1) through the first one-way bearing, the second driven ratchet wheel (5-2) is arranged in a second bearing seat (12-2) through the second one-way bearing (10-2), the driving ratchet wheel (9) is fixedly connected on a motor shaft of the motor (2), the first driven ratchet wheel (5-1) is arranged between the first driven ratchet wheel (5-2) and the first driven ratchet wheel (9), the first driven ratchet wheel (5-1) and the second driven ratchet wheel (5-2) can axially reciprocate along the transition shaft (11), the first driven gear (7-1) and the second driven gear (7-2) are fixedly connected on the output shaft (8), the first transition gear (3-1) can be meshed with the first driven gear (7-1), and the second transition gear (3-2) can be meshed with the second driven gear (7-2);
the two end faces of the driving ratchet wheel (9) are provided with driving ratchet wheel tooth-shaped faces, a first driven ratchet wheel (5-1) is sleeved at one end of a transition shaft (11), the inner end face of the first driven ratchet wheel (5-1) is provided with a first driven ratchet wheel tooth-shaped face, the inner ring of a first one-way bearing (10-1) is fixedly sleeved on the first driven ratchet wheel (5-1), the outer ring of the first one-way bearing (10-1) is fixedly connected on a first bearing seat (12-1), one end part of the transition shaft (11) is in rotary connection with the first bearing seat through a first rolling bearing (13), a second driven ratchet wheel (5-2) is sleeved at the other end of the transition shaft (11), the inner ring of the second one-way bearing (10-2) is fixedly sleeved on the second driven ratchet wheel (5-2), the outer ring of the second one-way bearing (10-2) is fixedly connected on a second bearing seat (12-2), and the other end part of the transition shaft (11) is in rotary connection with the first bearing seat through a first rolling bearing (13);
a plurality of mounting grooves (901) are formed in the inner circumferential side wall of the driving ratchet wheel (9) along the circumferential direction, each mounting groove (901) is respectively arranged along the radial direction, a positioning steel ball (4) is respectively arranged in each mounting groove (901), a spring (6) is arranged between each positioning steel ball (4) and the groove bottom of each mounting groove (901), two annular grooves (1101) are formed in the outer circumferential side wall of the transition shaft (11) in parallel along the axial direction, the two annular grooves (1101) are adjacently arranged, and the outer part of each positioning steel ball (4) is pressed into one annular groove (1101) under the elastic action of the spring (6).
2. A passive dual reduction ratio clutch as defined in claim 1, wherein: the driving ratchet tooth surface at one end of the driving ratchet wheel (9) is matched with the first driven ratchet tooth surface of the first driven ratchet wheel (5-1), and the driving ratchet tooth surface at the other end of the driving ratchet wheel (9) is matched with the second driven ratchet tooth surface of the second driven ratchet wheel (5-2).
3. A passive dual reduction ratio clutch as defined in claim 2, wherein: when the driving ratchet wheel (9) moves along the transition shaft (11) to be close to the first driven ratchet wheel (5-1), a driving ratchet tooth surface at one end of the driving ratchet wheel (9) is contacted with a first driven ratchet tooth surface of the first driven ratchet wheel (5-1), a driving ratchet tooth surface at the other end of the driving ratchet wheel (9) is separated from a second driven ratchet tooth surface of the second driven ratchet wheel (5-2), the first transition gear (3-1) is meshed with the first driven gear (7-1), and the second transition gear (3-2) is separated from the second driven gear (7-2); when the driving ratchet wheel (9) moves along the transition shaft (11) to be close to the second driven ratchet wheel (5-2), the driving ratchet tooth surface at one end of the driving ratchet wheel (9) is separated from the first driven ratchet tooth surface of the first driven ratchet wheel (5-1), the driving ratchet tooth surface at the other end of the driving ratchet wheel (9) is contacted with the second driven ratchet tooth surface of the second driven ratchet wheel (5-2), the first transition gear (3-1) is separated from the first driven gear (7-1), and the second transition gear (3-2) is meshed with the second driven gear (7-2).
4. A passive dual reduction ratio clutch as defined in claim 3, wherein: the tooth-shaped surfaces of the driving ratchet wheels at two ends of the driving ratchet wheel (9) are double spiral inclined surfaces, and the tooth-shaped surfaces of the first driven ratchet wheel (5-1) and the tooth-shaped surfaces of the second driven ratchet wheel (5-2) are double spiral inclined surfaces.
5. A passive dual reduction ratio clutch as defined in claim 1, wherein: a gap is arranged between the first passive ratchet wheel (5-1) and the transition shaft (11) and between the second passive ratchet wheel (5-2) and the transition shaft.
6. A passive dual reduction ratio clutch as defined in claim 1, wherein: the rotation directions of the first unidirectional bearing (10-1) and the second unidirectional bearing (10-2) are opposite.
7. A passive dual reduction ratio clutch as defined in claim 1, wherein: the motor shaft, the transition shaft (11) and the output shaft (8) of the motor (2) are all arranged in parallel, and the transition shaft (11) is arranged between the motor shaft and the output shaft (8) of the motor (2).
8. A passive dual reduction ratio clutch as defined in claim 1, wherein: the groove walls at two sides of the annular groove (1101) are obliquely arranged inwards from the groove opening to the groove bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111215880.0A CN113883239B (en) | 2021-10-19 | 2021-10-19 | Passive clutch with double reduction ratios |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS54132057A (en) * | 1978-04-03 | 1979-10-13 | Omron Tateisi Electronics Co | Speed change gear |
| US6080073A (en) * | 1998-12-21 | 2000-06-27 | Industrial Technology Research Institute | Electric auxiliary apparatus for bicycle |
| TW459936U (en) * | 2001-03-27 | 2001-10-11 | Pantech Internat Inc | Forward and backward rotating control device |
| JP5567517B2 (en) * | 2011-03-22 | 2014-08-06 | 株式会社デンソー | Power transmission device |
| CN202612499U (en) * | 2012-04-23 | 2012-12-19 | 阮送良 | Positive and negative bidirectional input variable speed mechanism |
| CN203473182U (en) * | 2013-08-05 | 2014-03-12 | 华蓥泰丰电动车有限公司 | Electric motorbike double-clutch ratchet wheel gear shifting mechanism |
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