A ratchet-type bidirectional clutch device

Abstract

The present invention belongs to the technical field of power transmission control, and specifically relates to a ratchet-type two-way clutch device. The structure of the present invention is as follows: the first rotating part and the second rotating part are coaxially mounted and can rotate relative to each other; the first and second ratchet wheels that rotate synchronously with the second rotating part in opposite directions are mounted on the second rotating part; the first platform area and the second platform area with different heights are provided on the first rotating part; the first pawl is swingably arranged on the first platform area, and the second pawl is swingably arranged on the second platform area; the first pawl corresponds to the first ratchet wheel, and the second pawl corresponds to the second ratchet wheel, and both have a coupled state and a disengaged state, and the first pawl driving device drives the first pawl to switch between the coupled state and the disengaged state, and the second pawl driving device drives the second pawl to switch between the coupled state and the disengaged state. The present invention has a variety of clutch states and power transmission states, can provide a very large clutch force, and has high stability and reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of power transmission control, and in particular relates to a ratchet type two-way clutch device. Background Art

[0002] At present, the home appliance industry is developing rapidly in the direction of intelligence, which puts forward extensive demands for the automatic switching of the fan wing structure (such as the refrigerator door) in home appliances, and also brings broad application prospects to the actuator that drives the rotation of the fan wing structure.

[0003] In order to make the operation of household appliances more user-friendly, the actuator is often required to be able to switch between automatic and manual operation. The current solution is to connect the electromagnetic clutch or mechanical clutch in series in the power transmission path of the actuator to achieve the switch between automatic mode and manual mode. At present, the mechanical clutch has certain defects in terms of sticking feeling and noise; the electromagnetic clutch controls the friction plate by turning the coil on and off, which has problems such as high cost, insufficient clutch force, and low stability. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a clutch device with large clutch force, high reliability, economical cost and bidirectional clutch capability.

[0005] The ratchet-type two-way clutch device provided by the present invention comprises a first rotating part, a second rotating part, a first ratchet, a second ratchet, at least one first pawl, at least one second pawl, a first pawl driving device, and a second pawl driving device; the first rotating part and the second rotating part are coaxially installed, and the first rotating part and the second rotating part can rotate relative to each other; the first ratchet and the second ratchet are installed on the second rotating part, and the first ratchet and the second ratchet rotate in opposite directions; a first platform area and a second platform area with different heights are provided on the first rotating part; the first pawl is swingably arranged on the first platform area, and the second pawl is swingably arranged on the second platform area; the first pawl has a combined state engaged with the first ratchet and a disengaged state separated from the first ratchet, and the second pawl also has a combined state engaged with the second ratchet and a disengaged state separated from the second ratchet; the first pawl driving device drives the first pawl to switch between the combined state and the disengaged state, and the second pawl driving device drives the second pawl to switch between the combined state and the disengaged state.

[0006] When the ratchet-type bidirectional clutch device provided by the present invention is working, one of the first rotating part and the second rotating part is selected as the input end of the power, and the other is selected as the output end of the power. The states of the first pawl and the second pawl are controlled by the first pawl driving device and the second pawl driving device, so that switching between the following four states can be realized:

[0007] State 1: the first pawl and the second pawl are both in a disengaged state, at which time the first rotating part and the second rotating part can rotate freely relative to each other without transmitting power;

[0008] State 2: the first pawl is in a disengaged state, and the second pawl is in a coupled state, and at this time, power can be transmitted unidirectionally between the first rotating part and the second rotating part;

[0009] State three, the first pawl is in the engaged state, and the second pawl is in the disengaged state. At this time, power can be transmitted unidirectionally between the first rotating part and the second rotating part, and the rotation direction of the power transmission is opposite to that of state two;

[0010] State four: the first pawl and the second pawl are both in a coupled state, and power can be transmitted bidirectionally between the first rotating part and the second rotating part.

[0011] Furthermore, the first pawl has a first engaging portion at one end close to the first ratchet wheel, and has a first touching portion at one end away from the first ratchet wheel. The first pawl driving device controls the swing of the first pawl by applying an extrusion force to the first touching portion, thereby controlling the engagement and disengagement of the first engaging portion with the first ratchet wheel.

[0012] Similarly, the second pawl has a second engaging portion at one end close to the second ratchet wheel, and a second touching portion at one end away from the second ratchet wheel. The second pawl driving device controls the swing of the second pawl by applying a squeezing force to the second touching portion, thereby controlling the engagement and disengagement of the second engaging portion with the second ratchet wheel.

[0013] Furthermore, a first pin is provided in the first platform area, a first pin hole cooperating with the first pin is provided in the middle of the first pawl, and a first torsion spring connecting the first pawl and the first platform area is also sleeved on the first pin; the first torsion spring twists the first pawl in the direction of making the first engaging part close to the first ratchet.

[0014] Similarly, a second pin is provided in the second platform area, a second pin hole cooperating with the second pin is provided in the middle of the second pawl, and a second torsion spring connecting the second pawl and the second platform area is also sleeved on the second pin; the second torsion spring twists the second pawl in the direction of making the second engaging part close to the second ratchet.

[0015] Furthermore, outer surfaces of the first touch portion and the second touch portion both have smooth arc surfaces, making the pressing and contact smoother.

[0016] Furthermore, the first ratchet driving device is arranged around the first ratchet; the first ratchet driving device includes a pair of push-pull drivers that are fixed and positioned opposite to each other and a pair of clamps fixed on the push-pull drivers that can be engaged with each other, which are recorded as type A clamps and type B clamps; the type A clamp has a semicircular type A clamp body, and the type B clamp has a semicircular type B clamp body; the type A clamp body and the type B clamp body are engaged in a circular shape. When the push-pull driver pulls the type A clamp body and the type B clamp body away from each other, space is left for the first touch portion to swing outward, so that the first engaging portion is engaged with the first ratchet. When the push-pull driver pushes the type A clamp body and the type B clamp body to engage with each other, the clamp squeezes the first touch portion to disengage the first engaging portion from the first ratchet.

[0017] Similarly, the second pawl driving device is disposed around the second ratchet wheel; the second pawl driving device has the same mechanical structure and working principle as the first pawl driving device.

[0018] Furthermore, the end of the A-type clamp body has a slot that is turned outward obliquely, and the end of the B-type clamp body has a strip that is turned outward obliquely and plugs into the slot, which can prevent the end of the A-type clamp body from being misaligned with the end of the B-type clamp body, thereby improving the stability of operation.

[0019] Furthermore, the slot and the end of the insert are also connected with a reset spring to assist in resetting. Preferably, when the A-type clamp body and the B-type clamp body are in engagement, the reset spring is in a free state or a slightly compressed state; when the A-type clamp body and the B-type clamp body are away from each other, the reset spring is in a compressed state, so that the reset spring can reset the A-type clamp body and the B-type clamp body to the engaged state.

[0020] Furthermore, in order to improve the stability of the return compression spring when under pressure, a guide column can be inserted into the return compression spring, and the guide column is fixed at the end of the slot or the insert.

[0021] Furthermore, the push-pull driver is preferably an electromagnetic push-pull rod. Generally, the electromagnetic push-pull rod has a sleeve and a rod slidably disposed in the sleeve, a coil is wound around one end of the rod located in the sleeve, a permanent magnet acting on the coil is disposed inside the sleeve, and the extension and retraction of the rod can be conveniently controlled by energizing the coil and controlling the direction of the current.

[0022] Furthermore, a power connection part may be provided on the first rotating part and the second rotating part to facilitate power transmission with the outside. For example, a power connection part such as a spur gear ring, a helical gear ring, a worm gear ring, a sprocket, a pulley, etc. may be provided on the edge of the first rotating part and the second rotating part, or a power connection part such as a spline, a spline sleeve, a worm, a screw, etc. may be provided in the center of the first rotating part and the second rotating part.

[0023] Beneficial effects: Compared with the prior art, the ratchet-type two-way clutch device provided by the present invention has a variety of clutch states and power transmission states, which brings a lot of possibilities to the design of actuator products; the ratchet-type two-way clutch device provided by the present invention can provide a very large clutch force, and thus can be suitable for the transmission of large torque; the ratchet-type two-way clutch device provided by the present invention has high stability and reliability, and the switching and resetting between various states can be carried out smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 and 2 It is a schematic diagram of the structure of the present invention.

[0025] Figure 3 for Figure 2 A partial enlarged view of .

[0026] Figure 4 It is a schematic diagram of the cooperation between the first pawl and the second pawl on the first rotating part.

[0027] Figure 5 It is a schematic diagram of the cooperation between the first ratchet and the second ratchet on the second rotating part.

[0028] Figure 6 It is a schematic structural diagram of the first ratchet driving device.

[0029] Figure 7 It is a structural diagram of the A-type clamp.

[0030] Figure 8 It is a structural diagram of type B clamp.

[0031] Fig. 9 for Figure 7 A partial enlarged view of .

[0032] Fig.10 It is a structural schematic diagram of the first pawl in a disengaged state.

[0033] Fig.11 It is a structural schematic diagram of the first pawl in the engaged state.

[0034] In the figure, the first rotating part 1, the second rotating part 2, the first ratchet 3, the second ratchet 4, the first pawl 5, the second pawl 6, the first pawl driving device 7, the second pawl driving device 8, the first platform area 11, the second platform area 12, the first clamping part 51, the first touch part 52, the second clamping part 61, the second touch part 62, the first pin 13, the first pin hole 53, the first torsion spring 131, the second pin 14, the second pin hole 63, the second torsion spring 141, the push-pull driver 71, the A-type clamp 73, the B-type clamp 74, the A-type clamp body 731, the B-type clamp body 741, the slot 732, the insert 742, the reset compression spring 75, and the guide column 76. DETAILED DESCRIPTION

[0035] The present invention is further illustrated by the following examples, which are intended to more clearly illustrate the technical solution of the present invention and should not be construed as a limitation.

[0036] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood as the usual meanings understood by people with ordinary skills in the field. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] A ratchet-type two-way clutch device, such as Figures 1 to 11 As shown, it includes a first rotating part 1, a second rotating part 2, a first ratchet 3, a second ratchet 4, a pair of first pawls 5, a pair of second pawls 6, a first pawl driving device 7, and a second pawl driving device 8; the first rotating part 1 and the second rotating part 2 are coaxially installed, and the first rotating part 1 and the second rotating part 2 can rotate relative to each other; the first ratchet 3 and the second ratchet 4 that rotate synchronously with the second rotating part 2 are installed on the second rotating part 2, and the directions of the first ratchet 3 and the second ratchet 4 are opposite; a first platform with different heights is provided on the first rotating part 1 Area 11 and a second platform area 12; the first pawl 5 is swingably disposed on the first platform area 11, and the second pawl 6 is swingably disposed on the second platform area 12; the first pawl 5 has a combined state engaged with the first ratchet 3 and a disengaged state separated from the first ratchet 3, and the second pawl 6 also has a combined state engaged with the second ratchet 4 and a disengaged state separated from the second ratchet 4; the first pawl driving device 7 drives the first pawl 5 to switch between the engaged state and the disengaged state, and the second pawl driving device 8 drives the second pawl 6 to switch between the engaged state and the disengaged state.

[0038] Further, the first pawl 5 has a first engaging portion 51 at one end close to the first ratchet 3, and a first actuating portion 52 at one end away from the first ratchet 3. The first pawl driving device 7 controls the swing of the first pawl 5 by applying a squeezing force to the first actuating portion 52, thereby controlling the engagement and disengagement of the first engaging portion 51 with the first ratchet 3. Similarly, the second pawl 6 has a second engaging portion 61 at one end close to the second ratchet 4, and a second actuating portion 62 at one end away from the second ratchet 4. The second pawl driving device 7 controls the swing of the second pawl 6 by applying a squeezing force to the second actuating portion 62, thereby controlling the engagement and disengagement of the second engaging portion 61 with the second ratchet 4.

[0039] Furthermore, a first pin 13 is provided in the first platform area 11, a first pin hole 53 cooperating with the first pin 13 is provided in the middle of the first pawl 5, and a first torsion spring 131 connecting the first pawl 5 and the first platform area 11 is sleeved on the first pin 13; the first torsion spring 131 twists the first pawl 5 in the direction of making the first engaging portion 51 close to the first ratchet 3. Similarly, a second pin 14 is provided in the second platform area 12, a second pin hole 63 cooperating with the second pin 14 is provided in the middle of the second pawl 6, and a second torsion spring 141 connecting the second pawl 6 and the second platform area 12 is sleeved on the second pin 14; the second torsion spring 141 twists the second pawl 6 in the direction of making the second engaging portion 61 close to the second ratchet 4.

[0040] Furthermore, outer surfaces of the first actuating portion 52 and the second actuating portion 62 both have smooth curved surfaces.

[0041] Further, the first ratchet driving device 7 is arranged around the first ratchet wheel 3; the first ratchet driving device 7 includes a pair of push-pull drivers 71 fixedly arranged and positioned opposite to each other and a pair of clamps fixed on the push-pull driver 71 and capable of facing each other, which are marked as A-type clamps 73 and B-type clamps 74; the A-type clamp 73 has a semicircular A-type clamp body 731, and the B-type clamp 74 has a semicircular B-type clamp body 741; the A-type clamp body 731 and the B-type clamp body 741 are clamped to form a circle. The second ratchet driving device 8 is arranged around the second ratchet wheel 4; the second ratchet driving device 8 has the same mechanical structure as the first ratchet driving device 7.

[0042] Furthermore, the end of the A-type clamp body 731 has a slot 732 that is turned outward obliquely, and the end of the B-type clamp body 741 has a plug strip 742 that is turned outward obliquely and plugged into the slot 732 .

[0043] Furthermore, the ends of the slot 732 and the inserting strip 742 are connected to a return spring 75 .

[0044] Furthermore, a guide column 76 is provided inside the return compression spring 75 .

[0045] Furthermore, the push-pull driver 71 is an electromagnetic push-pull rod.

[0046] Furthermore, the edges of the first rotating part 1 and the second rotating part 2 are both provided with gear ring parts.

[0047] Obviously, the above embodiments are exemplary and are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments, other embodiments that can be obtained by ordinary technicians in this field without creative work should also fall within the scope of protection of the present invention.

Claims

1. A ratchet-type two-way clutch device, characterized in that: The invention comprises a first rotating part (1), a second rotating part (2), a first ratchet (3), a second ratchet (4), at least one first pawl (5), at least one second pawl (6), a first ratchet driving device (7), and a second ratchet driving device (8); the first rotating part (1) and the second rotating part (2) are coaxially mounted, and the first rotating part (1) and the second rotating part (2) can rotate relative to each other; the second rotating part (2) is mounted with a first ratchet (3) and a second ratchet (4) which rotate synchronously with the second rotating part (2), and the first ratchet (3) and the second ratchet (4) rotate in opposite directions; the first rotating part (1) is provided with a first flat plate having different heights. The first pawl (5) is swingably disposed on the first platform area (11), and the second pawl (6) is swingably disposed on the second platform area (12); the first pawl (5) has a combined state in which it is engaged with the first ratchet (3) and a disengaged state in which it is separated from the first ratchet (3), and the second pawl (6) also has a combined state in which it is engaged with the second ratchet (4) and a disengaged state in which it is separated from the second ratchet (4); the first pawl driving device (7) drives the first pawl (5) to switch between the combined state and the disengaged state, and the second pawl driving device (8) drives the second pawl (6) to switch between the combined state and the disengaged state; The first pawl (5) has a first engaging portion (51) at one end close to the first ratchet (3), and has a first actuating portion (52) at one end away from the first ratchet (3); the first pawl driving device (7) controls the swing of the first pawl (5) by applying a squeezing force to the first actuating portion (52), thereby controlling the engagement and disengagement of the first engaging portion (51) with the first ratchet (3); The second pawl (6) has a second engaging portion (61) at one end close to the second ratchet (4), and has a second actuating portion (62) at one end of the second pawl (6) away from the second ratchet (4). The second pawl driving device (7) controls the swing of the second pawl (6) by applying a squeezing force to the second actuating portion (62), thereby controlling the engagement and disengagement of the second engaging portion (61) with the second ratchet (4). A first pin (13) is provided in the first platform area (11), a first pin hole (53) cooperating with the first pin (13) is provided in the middle of the first pawl (5), and a first torsion spring (131) connecting the first pawl (5) and the first platform area (11) is sleeved on the first pin (13); the first torsion spring (131) twists the first pawl (5) in a direction so that the first engaging portion (51) is close to the first ratchet wheel (3); A second pin (14) is provided in the second platform area (12); a second pin hole (63) cooperating with the second pin (14) is provided in the middle of the second pawl (6); a second torsion spring (141) connecting the second pawl (6) and the second platform area (12) is sleeved on the second pin (14); the second torsion spring (141) twists the second pawl (6) in a direction so that the second engaging portion (61) is close to the second ratchet (4); The first ratchet driving device (7) is arranged around the first ratchet wheel (3); the first ratchet driving device (7) comprises a pair of push-pull drivers (71) fixedly arranged and positioned opposite to each other, and a pair of clamps fixed on the push-pull drivers (71) and capable of embracing each other, which are denoted as type A clamps (73) and type B clamps (74); the type A clamp (73) has a semicircular type A clamp body (731), and the type B clamp (74) has a semicircular type B clamp body (741); the type A clamp body (731) and the type B clamp body (741) are embracing each other to form a circle; The second ratchet driving device (8) is arranged around the second ratchet wheel (4); the second ratchet driving device (8) has the same mechanical structure as the first ratchet driving device (7); The edges of the first rotating part (1) and the second rotating part (2) are both provided with gear ring parts.

2. The ratchet type two-way clutch device according to claim 1, characterized in that: The outer surfaces of the first touch portion (52) and the second touch portion (62) both have smooth curved surfaces.

3. The ratchet type two-way clutch device according to claim 1, characterized in that: The end of the A-type clamp body (731) has a slot (732) that is turned outward obliquely, and the end of the B-type clamp body (741) has a plug strip (742) that is turned outward obliquely and plugs into the slot (732).

4. The ratchet type two-way clutch device according to claim 3, characterized in that: The slot (732) and the end of the inserting strip (742) are also connected to a return compression spring (75).

5. The ratchet type two-way clutch device according to claim 4, characterized in that: A guide column (76) is also provided inside the return compression spring (75).

6. The ratchet type two-way clutch device according to claim 1, characterized in that: The push-pull driver (71) is an electromagnetic push-pull rod.

Images