WO2020088193A1

WO2020088193A1 - Duel-block overrunning clutch

Info

Publication number: WO2020088193A1
Application number: PCT/CN2019/109816
Authority: WO
Inventors: 周承岗
Original assignee: 周承岗
Priority date: 2018-10-31
Filing date: 2019-10-03
Publication date: 2020-05-07

Abstract

A duel-block overrunning clutch is a non-contact overrunning clutch, comprises a locking element linked a roller (5). The rolling contact of the roller (5) with a locked object during an overrunning travel avoids the sliding contact of the locking element, so that response to the change of a relative speed of the locked object can be made in real time, and abrasion and energy consumption can be reduced. A magnetic suspension structure used between the roller and a cage can further reduce the resistance and absorb shock. The roller is not only an element for triggering and performing the lock and separation, but also acts as a bearing. The resource utilization rate is high, and structure simplification is facilitated. The locking element can perform friction-transmission by means of wire contact, and cooperation with a surface-contact locking element or rigid meshing element can also be used to greatly improve the carrying capacity. In addition, functions, such as forward lock and reverse separation, forward separation and reverse lock, and two-way lock, are achieved by means of an inclination adjustment mechanism.

Description

Double block overrunning clutch

Technical field

The invention provides an overrunning clutch.

Background technique

The current overrunning clutches are mainly contact roller or wedge overrunning clutches. The rollers or wedges must keep in contact with the outer ring or inner ring during the overtravel stroke, which not only reduces heat and energy consumption, reduces transmission efficiency, but also severely shortens life. The contactless overrunning clutch overcomes the above disadvantages of the contact type overrunning clutch and is an important branch of the overrunning clutch. Among them, the wedge-type contactless overrunning clutch has good development prospects because of its simple structure, reliable locking, and easy separation, but There are also some defects-in the overtravel stroke, the wedge is tilted under centrifugal action to maintain the distance from the outer ring and the inner ring, which needs to be achieved under certain speed conditions, the scope of use is greatly limited; the wedge The contact form with the outer ring and the inner ring is line contact, the transmission area is small, and the transmission surface is easily damaged due to too much pressure; the bearing or roller only has a drag reduction effect, and the low resource utilization rate affects the simplified structure.

Summary of the invention

The purpose of the present invention is to provide an overrunning clutch device, the locking element of which is linked to the roller (5) or the middle ring (8), and the roller (5) or the middle ring (8) is used to roll with the locking object during the overtravel stroke 、 Sliding connection to prevent the locking element from sliding contact or non-pressure contact, which can respond to the change of the relative speed of the locking object at any time and reduce wear and energy consumption, the roller (5) and the middle ring (8), Or the magnetic suspension structure between the middle ring (8) and the inner ring (9) and the outer ring (1) can further reduce drag and shock absorption. The roller (5) or the middle ring (8) not only locks and separates the trigger and The actuator also functions as a bearing. The resource utilization rate is high, which is conducive to simplification of the structure. The locking element can be frictionally driven by line contact, or it can be greatly cooperated with the surface contact type locking element or rigid meshing element. Improve the carrying capacity, in addition, through the tilt adjustment mechanism to achieve positive locking and reverse separation, positive separation and reverse locking, two-way locking and other functions.

The invention is provided with a middle ring (8), or a combination of a roller (5) and a middle ring (8). The middle ring (8) is a bushing that independently supports and reduces drag, and can also be a roller (5) The cage or the raceway can also be both a bushing and a cage or a raceway. They are on one side with one of the outer ring (1), the clutch seat, the inner ring (9) and the middle shaft (10). The circumferential range can be relatively rotated, while on the other side, it is relatively rotated within a limited range with one of the outer ring (1), the clutch seat, the inner ring (9), and the middle shaft (10); the locking element includes a double block ( 3) It is rotatably connected with the roller (5) or the middle ring (8), and is also connected with the outer ring (1), the clutch seat, and the inner ring that can relatively rotate with the roller (5) or the middle ring (8) within a limited range One of the ring (9) or the central shaft (10) is connected by rotation, the two connection points are at different radial positions, so that the double coupling block (3) can follow the roller (5) or the center ring (8) at the connection point ) And the outer ring (1), the clutch seat, the inner ring (9) or the middle shaft (10) angular displacement occurs and tilts in the circumferential direction, and can limit the angular displacement range; the radial direction of the double block (3) The size can be negatively correlated with the change of the angle of its long axis relative to the radial direction When the included angle is maximum, the double coupling block (3) and the outer ring (1), the clutch seat, the inner ring (9) or the middle shaft (10) as the raceway of the roller (5) may not contact or have no pressure contact.

The double coupling block (3) of the invention is a friction type locking element or a rigid meshing locking element, which is directly transmitted with the outer ring (1), the clutch seat, the inner ring (9) or the middle shaft (10).

The locking element of the present invention includes, but is not limited to, a rack, a gear ring, a friction ring, a friction block, an expansion ring or a flexible ring, which can be placed on the double coupling block (3), roller (5), middle ring (8), outer Driven by the ring (1), clutch seat, inner ring (9), or bottom bracket (10), contact friction, rigid engagement, or engagement with the outer ring (1), clutch seat, inner ring (9), or bottom bracket (10) or Separate.

The roller (5) or the middle ring (8) of the invention is provided with a magnetic material that makes them mutually exclusive, or with a roller (17) that can constrain the outer surface of the roller, or the roller (5) passes through the pin (17) Rotating connection with the middle ring (8).

The outer ring (1) and the inner ring (9) of the present invention can also be the outer ring (1) and the middle shaft (10), the inner ring (9) and the clutch seat or the clutch seat and the middle shaft (10) Rotate to fit by sliding, rolling or magnetic suspension.

The double block (3) of the present invention is connected with an elastic material, so that the double block (3) can be momentarily tilted in the locking direction in the overrun state.

The double block (3) of the invention is connected with an inclination adjustment mechanism to perform wear compensation adjustment, and its technical types include, but are not limited to, eccentric wheels, rocker arms, connecting rods, pull wires, worms, threads, electric power, pneumatic power, and hydraulic power. Or magnetic mechanism.

The duplex block (3) of the present invention is divided into two groups of forward tilt and backward tilt, the duplex block (3) of the same group is divided into two groups of forward tilt and backward tilt, and the duplex block (3) of the same group has the same The direction of inclination, inclination and radial dimensions can be adjusted by the inclination adjustment mechanism to make the slip angles of two sets of double blocks (3) have various combinations-the forward inclination group is larger than the backward inclination group, and the forward inclination group is smaller than the rear The tilt group, the forward tilt group and the backward tilt group are equal, so as to realize the functions of forward locking and reverse separation of the whole device, forward separation and reverse locking, and bidirectional locking.

The present invention has an external control device that can control the tilt adjustment mechanism, and its technical types include, but are not limited to, pull cords, push rods, pull rods, knobs, buttons, or sliders.

The invention has a built-in sensor, communication module or power supply device, which can be used to monitor the status of internal components.

BRIEF DESCRIPTION

FIG. 1 is a structural diagram of an embodiment in which a double block is installed in an inner ring;

Figure 2 is a left side view of Figure 1;

FIG. 3 is a structural diagram of an embodiment in which a double-link block is installed on an outer ring;

4 is a structural diagram of an embodiment in which a locking element is driven by a double-link block;

FIG. 5 is a structural diagram of an embodiment in which a locking element is driven by a double coupling block and other components;

Figure 6 is a middle ring structure with magnetic material;

7 is a schematic diagram of the arrangement of the roller and the magnetic pole of the central ring;

Figure 8 is a middle ring structure with rollers;

Figure 9 is the structure of the roller and the middle ring rotating connection;

Fig. 10 is a structural diagram of an eccentric tilt adjustment mechanism.

detailed description

The invention has a locking element, which directly drives the clutch seat or the middle shaft, or an outer ring or an inner ring, and the outer ring or the inner ring drives the clutch seat or the middle shaft through the locking element. Figures 1 and 2 show an embodiment with an outer ring and an inner ring. The roller 5 is a round slewing body with a smooth surface, or a gear. The outer ring 1 has a raceway or a rack. The roller 5 can roll on the outer ring 1. The middle ring 8 is a cage or roller of the roller 5 The track may also be a bushing that does not require rollers 5 and functions independently between the outer ring 1 and the inner ring 9 to support and reduce drag, or it may be both a cage or a raceway and a bushing. The roller 5 can rotate relative to the outer ring 1 over the entire circumference on one side, and the inner ring 9 can only rotate relative to the limited range due to the restriction of the double block 3 on the other side. The middle ring 8 can also be connected in this way. The locking element includes a duplex block 3, one end of which is rotatably connected to the cylindrical pin on the roller 5 or the middle ring 8 through the oblong hole 2, both sides can also slide along the oblong hole 2, and at the same time, the duplex block 3 also passes through The pin 4 and the inner ring 9 are rotationally connected, and the above two connection points are at different radial positions, so that the double coupling block 3 can be tilted in the circumferential direction with the angular displacement between the middle ring 8 or the roller 5 and the inner ring 9 , And can define their angular displacement range. The double block 3 is inclined in the clockwise direction, and its radial dimension can be negatively correlated with the angle change of its long axis relative to the radial direction. When the outer ring 1 rotates clockwise with respect to the inner ring 9, the angular displacement between the roller 5 and the middle ring 8 and the inner ring and 9 occurs, the duplex block 3 tilts clockwise and the radial dimension becomes smaller, when the limit position is reached Because the roller 5 bears the pressure of the outer ring 1, the double coupling block 3 and the outer ring 1 may not contact or have no pressure contact, and the clutch is in an overrun state. At this time, the movement of the roller 5 in the circumferential direction is affected by the double coupling block 3. Limited, but still rotates under the friction of the outer ring 1. When the outer ring 1 rotates counterclockwise relative to the inner ring, the double block 3 tilts counterclockwise and the radial size gradually becomes larger, until the roller 5 can be replaced to withstand the pressure of the outer ring 1, and the outer ring 1 and The inner ring 9 is locked, or the outer ring 1 and the inner ring 9 are locked by an end point and a pin 4. Between the roller 5 and the middle ring 8 is a magnetically levitated rolling fit, which can also be contact sliding or rolling. The middle ring 8 is spaced from the outer ring 1 by rollers 5 on the radial outer side, and can rotate relatively, while the radial inner side is not in contact with or rotating connection with the inner ring 9, and the rotation connection methods include but are not limited to contact sliding, with Roller rolling or magnetic suspension with magnetic materials. The duplex block 3 may be one or more than two distributed in the circumferential direction, and they are inclined in one direction to achieve one-way locking or separation, or divided into two groups and inclined in opposite directions to achieve two-way locking. . The double coupling block 3 may be a friction type locking element, or may have a rigid engagement locking structure at the end to engage with the locking object. The locking element may only have the double coupling block 3, or there may be other types of locking elements cooperating with the double coupling block 3, including but not limited to a rack, a gear ring, a friction ring, a friction block, an expansion ring, or a flexible ring. The double block 3 may be a direct locking element or an indirect locking element to drive other types of locking elements. The structural scheme of FIG. 1 can also be reversed as shown in FIG. 3-the double coupling block 3 is rotatably connected to the outer ring 1 through the pin 4 at the middle position, and at the same time is rotatably connected and slidingly connected to the roller 5 or the middle ring 8 through the oblong hole The roller 5 is in rolling connection with the inner ring 9, the middle ring 8 is spaced from the inner ring 9 with the roller 5 in the radial direction, and can rotate relatively, while the outer ring is not in contact with or rotating connection with the outer ring 1 or the clutch seat.

The double coupling block 3 in the embodiment of FIG. 1 is a friction type locking element, which locks the outer ring 1 and the inner ring 9 through the two end points of the long shaft, or the outer ring 1 and the pin 4 through one end point. The inner ring 9 is locked, and a tooth shape may also be provided at the end point, and at the same time, the outer ring 1, the clutch seat, the inner ring 9 or the central shaft 10 is also provided with a rack that can mesh with the transmission.

Referring to the embodiment of FIG. 4, there are a plurality of friction blocks 14, both ends of which are connected to the adjacent duplex blocks 3 in rotation, and the radial dimensions of the duplex blocks 3 when the relative speeds of the outer ring 1 and the inner ring 9 change There is also a change, so that the friction block 14 is driven toward or away from the outer ring 1 to achieve locking or disengagement of the clutch. Referring to the embodiment shown in FIG. 5, the flexible ring 15 is wound around the outer edge of the central shaft 10, and both ends of the flexible ring 15 are respectively connected to the two ends of the duplex block 3. The change in the radial dimension of the duplex block 3 makes the flexible ring 15 hug Tighten or loosen the bottom bracket 10 to lock or disengage the clutch. The types of locking elements include but are not limited to racks, gear rings, friction rings, friction blocks, expansion rings or flexible rings, and double blocks 3, rollers 5, middle rings 8, outer rings 1, and clutches that can move relative to each other The seat, the inner ring 9 or the middle shaft 10 are connected, and they can be in contact friction, rigid engagement or disengagement with the outer ring 1, the clutch seat, the inner ring 9 or the middle shaft 10 under their driving.

6 and 7, the center of the roller 5 has a magnetic block 21, the magnetic ring 22 in the middle ring 8 is distributed on one side or both sides of the roller 5 in the circumferential direction, the magnetic poles of the magnetic block 21 and the magnetic block 22 are on the axis Arranged in the direction or the circumferential direction, the tendency of the rollers 5 and the middle ring 8 to keep separated in the magnetic field by the repulsion of the homogenous magnetic poles can achieve the effect of magnetic levitation or reducing the contact pressure. Referring to FIG. 8, the roller 17 is rotatably connected to the middle ring 8 through a pin 16. The connection is provided with a micro roller, either directly sliding connection or magnetic suspension connection, which can roll when it contacts the roller 5. Referring to FIG. 9, the roller 5 is rotatably connected to the middle ring 8 through the pin shaft 11, and the connection is provided with a micro roller, either directly sliding connection or magnetic suspension connection.

Referring to FIG. 1, between the outer ring 1 and the inner ring 9, or between the outer ring 1 and the middle shaft 10, the inner ring 9 and the clutch seat or the clutch seat and the middle shaft 10, directly rotate in a sliding, rolling or magnetic suspension manner Cooperate.

Referring to FIGS. 1 and 2, an elastic material is provided between the distal end of the oblong hole 2 and the pin 11, so that the double block 3 is subjected to a pre-pressure that is tilted toward the locking direction when it is in the overrun state, and its value is less than that of maintaining the overrun state. The amount of force required prevents the locking function from malfunctioning when the roller 5 slips unexpectedly.

Refer to Figures 1 and 10. Fig. 10 shows the eccentric wheel type tilt adjustment mechanism-the eccentric wheel 25 is fixed on the pin 11 and changing its eccentric direction can change the maximum sliding stroke of the double block 3 and the pin 11 and the pair of eccentric wheel 25 to the oval The position of the inner wall of the hole 2 is in the radial position. Changing the eccentric direction of the eccentric wheel 25 can also make the tilting degree of the double block 3 have different sensitivity to the circumferential displacement of the pin shaft 11. The pin shaft 11 is used to adjust the tilt angle of the double block 3 between the locked state and the overrun state under a given condition, that is, the slip angle, so as to perform wear compensation or other functional adjustments of the transmission parts. The technical type of the tilt adjustment mechanism is not limited to the eccentric circle mechanism, but may also include, but not limited to, rocker arm, connecting rod, cable, worm, thread, electric, pneumatic, hydraulic or magnetic mechanism.

Referring to FIGS. 1 and 10, the duplex block 3 is divided into two groups of forward tilt and backward tilt. The duplex block 3 of the same group has the same tilt direction, tilt and radial dimensions; Two sets of duplex blocks 3 have different slip angle combinations-the forward tilt group is greater than the backward tilt group, the forward tilt group is smaller than the backward tilt group, the forward tilt group and the backward tilt group are equal; the slip angles of the two groups of duplex blocks 3 are equal When they are not equal, the locking function of one of the two groups is invalid. When the slip angles of the two sets of double blocks 3 are equal, their locking functions are normal, so that the whole device can be locked in the positive direction and separated in the reverse direction. The function of reverse locking and bidirectional locking.

Referring to FIG. 10, the pull cord 24 is connected to the pin 11, and pulling the pull cord from the outside can make the pin 11 forward or reverse to control the tilt adjustment mechanism. The external control device can also be, but not limited to, a push rod, a pull rod, a knob , Buttons or sliders.

Sensors, communication modules or power supply devices such as position, speed, acceleration, temperature, pressure or torque are installed inside the device, which can be used to monitor the status of internal components.

Claims

Double-block overrunning clutch, including the locking element, directly transmitted with the clutch seat or the middle shaft (10) or with an outer ring (1) or inner ring (9), through the outer ring (1) or inner ring (9) Transmission with clutch seat or middle shaft (10), characterized by a middle ring (8), or a combination of rollers (5) and middle ring (8), the middle ring (8) is solely used for support and drag reduction The bushing can also be the cage or raceway of the roller (5), it can also be both the bushing and the cage or the raceway, they are on one side with the outer ring (1), clutch seat, inner ring (9) One of the four and the middle shaft (10) can be relatively rotated over the entire circumference, while on the other side, one of the four is limited to the outer ring (1), the clutch seat, the inner ring (9) and the middle shaft (10). Relative rotation of the range; the locking element includes a duplex block (3), which is rotatably connected to the roller (5) or the middle ring (8), and is also opposite to the roller (5) or the middle ring (8) within a limited range One of the rotating outer ring (1), clutch seat, inner ring (9) or the middle shaft (10) is connected by rotation, the two connection points are at different radial positions, so that the double coupling block (3) can follow the connection Point roller (5) or middle ring (8) and outer ring (1), clutch seat Angular displacement occurs between the inner ring (9) or the central axis (10) and tilts in the circumferential direction, and can define the angular displacement range; the radial size of the double-block (3) can be relative to the radial direction with its long axis The change of the angle is negatively correlated. When the angle is the largest, the double block (3) and the outer ring (1), the clutch seat, the inner ring (9) or the middle shaft (10) as the raceway of the roller (5) ) It can be contacted without pressure or without pressure.
The double-coupling overrunning clutch according to claim 1, characterized in that the double-coupling block (3) is a frictional locking element or a rigid meshing locking element, which is connected to the outer ring (1), the clutch seat and the inner ring ( 9) Or the middle shaft (10) is directly driven.
The double block overrunning clutch according to claim 1, characterized in that the locking element includes but is not limited to a rack, a gear ring, a friction ring, a friction block, an expansion ring or a flexible ring, which can be attached to the double block (3) , Roller (5), middle ring (8), outer ring (1), clutch seat, inner ring (9) or middle shaft (10) and the outer ring (1), clutch seat, inner ring (9) Or the bottom bracket (10) performs contact friction, rigid engagement or disengagement.
The double block overrunning clutch according to claim 1, 2 or 3, characterized in that the roller (5) or the intermediate ring (8) is provided with a magnetic material that makes them mutually exclusive, or with a roller that can restrain the outer circumferential surface of the roller The roller (17) or the roller (5) is rotatably connected with the middle ring (8) through the pin shaft (17).
The double-block overrunning clutch according to claim 4, characterized in that between the outer ring (1) and the inner ring (9), it can also be the outer ring (1) and the middle shaft (10), the inner ring (9) Rotating fit with clutch seat or clutch seat and bottom shaft (10) in sliding, rolling or magnetic suspension mode.
The double-block overrunning clutch according to claim 1, 2, 3 or 5, characterized in that the double-block (3) is connected with an elastic material, which can apply a lock to the double-block (3) in an overrun state Moment of tilt in direction.
The double block overrunning clutch according to claim 6, characterized in that the double block (3) is connected with an inclination adjustment mechanism to perform wear compensation adjustment, and its technical types include but are not limited to eccentric wheels, rocker arms, connecting rods , Wire, worm, thread, electricity, pneumatic, hydraulic or magnetic mechanism.
The double block overrunning clutch according to claim 1, 2, 3, 5 or 7, characterized in that the double block (3) is divided into two groups of forward tilt and backward tilt, and the double block (3) of the same group has With the same inclination direction, inclination and radial dimensions, the combination of the inclination adjustment mechanism can make the slip angles of the two sets of double blocks (3) have multiple combinations-the forward tilt group is larger than the backward tilt group and forward tilt group Less than the backward tilt group, the forward tilt group and the backward tilt group are equal, so as to realize the functions of forward locking and reverse separation of the whole device, forward separation and reverse locking, and bidirectional locking.
The dual-block overrunning clutch according to claim 8, characterized in that an external control device can control the tilt adjustment mechanism, and its technical types include, but are not limited to, pull cords, push rods, pull rods, knobs, buttons, or sliders.
The double block overrunning clutch according to claim 1, 2, 3, 5, 7 or 9, characterized by a built-in sensor, communication module or power supply device, which can be used to monitor the condition of internal components.