CN218326031U - Manual-automatic integrated rotary actuator - Google Patents

Abstract

The utility model belongs to the technical field of rotary actuator, concretely relates to manual-automatic rotary actuator. The utility model provides a manual-automatic rotatory executor includes: the bearing part, the output shaft that rotatably installs on bearing part, fix the rotary power source on bearing part to and connect between output shaft and rotary power source and give the transmission assembly of rotary power source's power transmission for the output shaft. The transmission assembly is provided with a first planetary gear set, and the pressing device is used for controllably driving the friction piece to be in extrusion friction with a first ring gear in the first planetary gear set. The actuator can be controllably switched between a manual mode and an automatic mode, the switching process is stable and smooth, the user experience is improved, the service life of the actuator is prolonged, and the actuator has high integration level and is beneficial to saving space.

Description

Manual-automatic integrated rotary actuator

Technical Field

The utility model belongs to the technical field of rotary actuator, concretely relates to manual-automatic rotary actuator.

Background

Currently, the household appliance industry is rapidly evolving towards the direction of intellectualization, and the demand for automatic opening and closing of a movable door in household appliances such as refrigerators, ovens, disinfection cabinets and the like is increasing. In consideration of the situation of power failure and the habit of manual operation of users for a long time, the household electrical appliance which combines automatic operation and manual operation has stronger market competitiveness.

In order to achieve both automatic operation and manual operation, the rotary actuator for driving the movable door needs to be capable of freely switching between a manual mode and an automatic mode. The current mainstream solution is to provide a clutch, such as a mechanical clutch and an electromagnetic clutch, between the power upstream and the power downstream. When the electric operation is needed, the clutch is controlled to be switched to a connection state, and at the moment, the driving force from the upstream can be transmitted to the downstream to drive the movable door to rotate; when manual operation is required, the control clutch is switched to a disconnection state, the upstream and the downstream are separated, the power unit at the upstream does not obstruct the rotation of the movable door, and therefore the movable door can rotate freely.

However, the mechanical clutch has a jamming feeling during operation, and particularly when the mechanical clutch is switched from a power disconnecting state to a power connecting state, sudden connection of power can generate obvious jerk, and large impact is caused to the motor and the transmission gear set, so that user experience is poor, and meanwhile, the service lives of the motor and the transmission gear set are also shortened. Although the switching of the electromagnetic clutch is relatively smooth, certain impact can be caused to the motor and the transmission gear set at the moment of power connection, and the output torque of the electromagnetic clutch is smaller due to the limitation of the size.

In addition, the clutch in the existing actuator usually needs to occupy a certain space separately, for example, a rotary actuator proposed in patent CN212752039U of our company can well realize the switchable rotary execution function, but the clutch is connected to the transmission gear set as an independent functional unit, which occupies a large space, which is not favorable for reducing the volume of the actuator to save space.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model provides a manual-automatic rotatory executor.

The utility model provides a manual-automatic rotatory executor includes: the bearing device comprises a bearing piece, an output shaft which is rotatably arranged on the bearing piece, a rotary power source which is fixed on the bearing piece, and a transmission assembly which is connected between the output shaft and the rotary power source and transmits the power of the rotary power source to the output shaft.

The transmission assembly is provided with at least one stage of planetary gear set which is marked as a first planetary gear set; the first planetary gear set includes: the planetary gear set comprises a rotatable first planet carrier, a group of first planet gears, a first gear ring and a first sun gear, wherein the group of first planet gears are circumferentially distributed and arranged on the first planet carrier; the first sun gear is connected upstream of the power, and the first planet carrier is connected downstream of the power.

The manual-automatic rotatory executor still includes: the friction piece is close to the first gear ring, and the pressing device drives the friction piece to move; the first gear ring is provided with a first friction surface in the circumferential direction, the friction piece is provided with a second friction surface, and the pressing device can controllably drive the second friction surface to press the first friction surface.

Further, in the manual-automatic integrated rotation actuator, the friction member has an arc-shaped recess facing the first ring gear, the second friction surface is located on an inner wall of the arc-shaped recess, and the first friction surface is an outer circumferential surface of the first ring gear.

Furthermore, in the manual-automatic integrated rotary actuator, the pressing device is a push-pull electromagnet; the friction piece is arranged at the end part of the push-pull electromagnet, and the push-pull electromagnet pushes the friction piece to extrude the first gear ring when being electrified.

Further, in the above manual-automatic integrated rotation actuator, the transmission assembly further includes a second planetary gear set disposed downstream of the first planetary gear set; the second planetary gear set includes: the second planet carrier is rotatable, a group of second planet gears are circumferentially distributed on the second planet carrier, a second gear ring is positioned on the periphery of the second planet carrier and meshed with the second planet gears, and a second sun gear is positioned in the center of the second planet carrier and meshed with the second planet gears; the second sun gear is fixed in the center of the first planet carrier, and the second planet carrier is connected with the downstream of the power.

The manual-automatic integrated rotation actuator further comprises: the hoop component is elastically clasped on the second gear ring; when the torque of the second gear ring exceeds the limit torque generated by the embracing of the hoop component, the second gear ring rotates, and when the torque of the second gear ring does not exceed the limit torque generated by the embracing of the hoop component, the second gear ring is static.

Furthermore, in the manual-automatic integrated rotary actuator, the hoop assembly has a pair of half hoop bodies which embrace each other, adjusting bolts penetrate through the joints of the two half hoop bodies for connection, two ends of each adjusting bolt are sleeved with compression springs, and the compression springs apply pressing force to the half hoop bodies from the two ends.

Furthermore, in the manual-automatic integrated rotary actuator, the hoop component is in floating fit with the bearing piece; the bearing piece is provided with a floating groove; the two sides of each half hoop body are parallel and are in sliding fit in the floating groove.

Furthermore, in the manual-automatic integrated rotary actuator, the end part of the floating groove is open, so that a channel for screwing the adjusting bolt to adjust tightness is formed.

Furthermore, in the manual-automatic integrated rotation actuator, the outer periphery of the second ring gear has wavy lines, and the inner wall of the semi-hoop body also has wavy lines.

Furthermore, in the manual-automatic integrated rotary actuator, the transmission assembly is also provided with a reduction gear box; the input end of the reduction gear box is connected with the second planet carrier, and the output end of the reduction gear box is provided with a first bevel gear; the output shaft is provided with a second bevel gear; the first bevel gear is in meshed transmission connection with the second bevel gear.

Furthermore, the manual-automatic integrated rotation actuator further comprises an angular displacement measuring unit for measuring the rotation angle of the output shaft.

Advantageous effects

The utility model provides a manual-automatic rotatory executor sets up first planetary gear set at drive assembly to make first ring gear, friction member, the biasing means of first planetary gear set mutually support, realized following many-sided useful function: the first is that the actuator has a manual mode and an automatic mode; secondly, controllable switching between a manual mode and an automatic mode is realized; thirdly, the switching process has certain flexibility, so that the switching process is stable and smooth, the user experience is improved, and the service life of the actuator is prolonged; and fourthly, the clutch structure is formed based on the speed reducer, so that the clutch structure has the functions of reducing speed and increasing torque, and the integration level is improved to save the space occupation.

The utility model provides a manual-automatic rotary actuator further sets up second planetary gear set in drive assembly to make second planetary gear set and the cooperation of floatable staple bolt subassembly, realized following many-sided useful function: the first is that the function of torque limitation is realized, and the internal structure of the actuator can be protected when the actuator is subjected to abnormally large torque; secondly, the limit torque is easy to adjust according to actual requirements; thirdly, the limit torque set during long-term use has good stability.

The utility model provides a manual-automatic rotatory executor further sets up angle displacement measuring unit, can also carry out real-time accurate monitoring to the rotation angle of output shaft (2), provides the foundation for automated control.

Drawings

Fig. 1 is a schematic structural diagram of a manual-automatic integrated rotary actuator.

Fig. 2 and 3 are schematic diagrams of the internal structure of the manual-automatic integrated rotary actuator.

Fig. 4 is a schematic diagram of the transmission structure inside the actuator.

Fig. 5 is an exploded view of the transmission structure inside the actuator.

FIG. 6 is a schematic diagram of the first planetary gear set, the friction member, and the pressing device.

Fig. 7 is a schematic diagram of the second planetary gear set and the hoop assembly.

Fig. 8 is a schematic structural view of the hoop assembly.

Fig. 9 is a schematic structural view of the angular displacement measuring unit.

In the figure, a carrier 1, an output shaft 2, a rotary power source 3, a first planetary gear set 41, a first planet carrier 411, a first planet gear 412, a first ring gear 413, a first sun gear 414, a friction member 51, a pressing device 52, a first friction surface 4131, a second friction surface 513, a second planetary gear set 42, a second planet carrier 421, a second planet gear 422, a second ring gear 423, a second sun gear 424, a hoop assembly 6, a half hoop body 61, an adjusting bolt 62, a compression spring 63, a floating groove 11, a reduction gear box 43, a first bevel gear 44, a second bevel gear 45, an angular displacement sensor 71, a first synchronizing gear 72 and a second synchronizing gear 73.

Detailed Description

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

Unless defined otherwise, technical or scientific terms used herein should be understood as having the ordinary meaning as understood by those of ordinary skill in the art. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The manual-automatic integrated rotary actuator shown in fig. 1 to 3 includes: the bearing part 1, the output shaft 2 that can rotatably install on bearing part 1, the rotary power source 3 that fixes on bearing part 1 to and connect between output shaft 2 and rotary power source 3 and transmit the power of rotary power source 3 to output shaft 2's transmission subassembly. The carrier 1 may be a structural member such as a bracket or a housing, and serves as a carrier for mounting and fixing other components. The carrier 1 shown in fig. 1 and 2 is a housing that fits together from top to bottom, and not only serves as a mounting carrier, but also protects the internal transmission structure and circuitry. The output shaft 2 is used as an executing piece of the rotary actuator and is used for outputting rotary driving force outwards, and if the rotary actuator is installed in an intelligent refrigerator, the rotary actuator can drive a refrigerator door body to rotate. The rotary power source 3 is typically a motor, and can output a rotary driving force when energized. The transmission assembly is used to transmit power from the power source 3 to the output shaft 2.

For convenience of description, for any transmission member, the direction closer to the source of power is defined as upstream of the power, and the direction further away from the source of power is defined as downstream of the power. Therefore, in describing the specific structure of the transmission assembly, the direction close to the rotary power source 3 is the power upstream direction, and the direction close to the output shaft 2 is the power downstream direction. The direction of the power refers to the front-rear direction on the power transmission path, and does not necessarily correspond to the spatial direction.

As shown in fig. 4 and 5, the transmission assembly has a first planetary gear set 41 therein. As shown in fig. 6, the first planetary gear set 41 includes: a first rotatable carrier 411, a set of first planet gears 412 circumferentially distributed on the first carrier 411, a first ring gear 413 located on the outer periphery of the first carrier 411 and meshing with the first planet gears 412, and a first sun gear 414 located in the center of the first carrier 411 and meshing with the first planet gears 412. The first sun gear 414 is connected upstream of the power source, and may be directly connected to the output of the rotary power source 3 in the illustrated manner, or may be connected to the output of the rotary power source 3 through another transmission structure. The first planet carrier 411 is connected with the power downstream, and the first planet carrier 411 can be directly or indirectly connected with the output shaft 2, for example, the first planet carrier can indirectly drive the output shaft 2 to rotate in a mode shown in the figure; in addition, if the first carrier 411 and the output shaft 2 are located on the same axis, the first carrier 411 may directly drive the output shaft 2 to rotate.

In the above-described transmission assembly, if the movement of the first ring gear 413 is not restricted, the first ring gear 413 can be freely rotated, and the rotary power source 3 and the output shaft 2 are not actually power-connected. The manual-automatic integrated rotation actuator further comprises a device for controlling the degree of freedom of the first gear ring 413, as shown in fig. 6, and specifically comprises: a friction member 51 adjacent to the first ring gear 413, and a pressing device 52 driving the friction member 51 to move. The first ring gear 413 is provided with a first friction surface 4131 in the circumferential direction, the friction member 51 is provided with a second friction surface 513, and the pressing device 52 controllably drives the second friction surface 513 to press the first friction surface 4131.

When it is required that the manual-automatic integrated rotation actuator is in an automatic operation state, the pressing device 52 may be turned on to press the first friction surface 4131 and the second friction surface 513 against each other, so as to restrict the rotation of the first ring gear 413, and the first planetary gear set 41 may transmit the power received from the first sun gear 414 to the first planet carrier 411 at a speed reduced and torque increased state, that is, may transmit the upstream power to the downstream. When the manual-automatic integrated rotation actuator is required to be in a manual operation state, the pressing device 52 is not opened, the first ring gear 413 can rotate freely, the upstream power is not transmitted to the downstream, and the blocking effect of the rotation power source 3 does not influence the free rotation of the output shaft 2.

The control of the rotation of the first ring gear 413 by mutual compression of the first friction surface 4131 and the second friction surface 513 is a relatively flexible control, which does not cause the first ring gear 413 to lock instantaneously. Therefore, when automatic operation is carried out, the motor cannot bear overhigh load at the moment of starting, and meanwhile, the transmission structures such as the gear set and the like cannot bear overlarge impact, so that the service life is prolonged, the starting smoothness is improved, and the pause and frustration are reduced.

As shown in fig. 6, the portion for restricting the first ring gear 413 preferably adopts the following structure. The friction member 51 has an arc-shaped recess facing the first ring gear 413, the second friction surface 513 is located on an inner wall of the arc-shaped recess, and the first friction surface 4131 is an outer circumferential surface of the first ring gear 413. The pressing device 52 is a push-pull electromagnet; the friction piece 51 is arranged at the end part of the push-pull electromagnet, and when the push-pull electromagnet is electrified, the friction piece 51 is pushed to extrude the first gear ring 413.

The connection of the first sun gear 414 to the rotary power source 3 described above may be either a direct connection or an indirect connection. If considered in conjunction with the pressure-applying means 52, the first sun gear 414 is preferably directly connected to the rotary power source 3, so that the first ring gear 413 can be brought closer to the rotary power source 3 in the power transmission path. The rotary power source 3 is most commonly used as a motor, and a transmission process of speed reduction and torque increase is needed from the motor to the output shaft 2, so that the torque close to the rotary power source 3 is minimum, and the pressing device 52 only needs to output a small thrust force to limit the rotation of the first gear ring 413, so that the pressing device 52 with a smaller model can be selected, and the parts cost and the space can be saved.

As shown in fig. 7, the transmission assembly also has a second planetary gear set 42 disposed downstream of the first planetary gear set 41; the second planetary gear set 42 includes: a rotatable second planet carrier 421, a group of second planet wheels 422 circumferentially and distributively mounted on the second planet carrier 421, a second ring gear 423 positioned on the periphery of the second planet carrier 421 and engaged with the second planet wheels 422, and a second sun gear 424 positioned in the center of the second planet carrier 421 and engaged with the second planet wheels 422; the second sun gear 424 is fixed to the center of the first carrier 411, and the second carrier 421 is connected to the downstream of the power source. Furthermore, the manual-automatic integrated rotation actuator further includes: and the hoop component 6 elastically embraces the second gear ring 423. When the torque of the second gear ring 423 exceeds the limit torque generated by the clasping of the hoop component 6, the second gear ring 423 rotates relative to the hoop component 6; when the torque of the second gear ring 423 does not exceed the limit torque generated by the clasping of the hoop component 6, the second gear ring 423 is static relative to the hoop component 6.

The second planetary gear set 42 is provided in the case where the first planetary gear set 41 is already provided, in order to enhance the function of torque limitation. Here, a case is assumed where the manual-automatic body rotation actuator is used to drive opening and closing of a door body of a refrigerator if the door body suddenly encounters resistance when an automatic operation is performed or a user suddenly pushes and pulls the door body manually. In such a situation, a torque limiting structure is necessary for the internal facilities of the rotary actuator, otherwise damage to the motor and gear train is easily caused. The engagement of the first ring gear 413 with the friction element 51 may also act as a torque limiter, protecting the internal structure by slipping the first friction surface 4131 and the second friction surface 513 when an abnormally large torque is applied to the transmission assembly. However, the torque at the first ring gear 413 is small, the corresponding slip rotating speed is high, and if torque protection is to be considered, the first friction surface 4131 and the second friction surface 513 should be made of high-performance wear-resistant materials. And more preferably, a second planetary gear set 42 is provided downstream of the first planetary gear set 41, and the torque limiting function is realized by the hoop assembly 6 as described above. The second ring gear 423 has a low slip speed, and therefore, the requirements on the wear resistance and durability of the hoop assembly 6 are low.

As shown in fig. 8, the hoop assembly 6 has a pair of hoop halves 61 that embrace each other, and an adjusting bolt 62 is inserted into the joint of the two hoop halves 61 for connection, and a compression spring 63 is sleeved on each adjusting bolt 62 at both ends, and the compression spring 63 applies a pressing force to the hoop halves 61 from both ends. By tightening or loosening the adjusting bolt 62, the cohesion of the hoop assembly 6 can be adjusted, thereby adjusting the limit torque of the actuator.

As shown in fig. 7, the second ring gear 423 has an undulating pattern on the outer periphery, and as shown in fig. 8, the inner wall of the half hoop body 61 also has an undulating pattern. The hoop component 6 is in floating fit with the bearing piece 1; the bearing part 1 is provided with a floating groove 11; the two sides of each half hoop body 61 are parallel and are in sliding fit in the floating groove 11. The floating groove 11 is open at the end to form a passage for screwing the adjusting bolt 62 to adjust the tightness, so that the adjusting bolt 62 can be adjusted at the outside. The structure can improve the stability of torque limitation, and when the lines on the periphery of the second gear ring 423 and the lines on the inner wall of the semi-hoop body 61 mutually slip, the semi-hoop body 61 can float in the floating groove 11 in an adaptive manner, so that the distance of the jacked semi-hoop body 61 during each slipping of the lines is relatively stable, and the corresponding limit torque is relatively stable.

As shown in fig. 3 and 4, a reduction gear box 43 is also provided in the transmission assembly; the input end of the reduction gear box 43 is connected with the second planet carrier 421, and the output end of the reduction gear box 43 is provided with a first bevel gear 44; the output shaft 2 is provided with a second bevel gear 45; the first bevel gear 44 is in meshed transmission connection with the second bevel gear 45. Thus, the rotational driving force from the second carrier 421 is transmitted to the bevel gear set via the reduction gear box 43 to rotate the output shaft 2. Furthermore, if the reduction ratio of the first planetary gear set 41 and/or the second planetary gear set 42 has reached the required reduction ratio requirement, the reduction gear box 43 may not be provided.

In order to monitor the actual rotation angle of the output shaft 2 and provide a basis for automatic control, the manual-automatic integral rotation actuator further comprises an angular displacement measuring unit for measuring the rotation angle of the output shaft 2. As shown in fig. 9, the angular displacement measuring unit includes: an angular displacement sensor 71 fixed on the carrier 1, a first synchronizing gear 72 mounted on an input end of the angular displacement sensor 71, and a second synchronizing gear 73 mounted on the output shaft 2; the first synchronizing gear 72 is meshed with the second synchronizing gear 73. In this way, the actual rotation angle of the output shaft 2 and the monitoring data of the angular displacement sensor 71 form a one-to-one correspondence relationship, and therefore the rotation angle of the output shaft 2 can be accurately known.

The above embodiments are exemplary and are intended to illustrate the technical concept and features of the present invention so that those skilled in the art can understand the contents of the present invention and implement the present invention, and the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. A manual-automatic integrated rotary actuator, comprising: the device comprises a bearing piece (1), an output shaft (2) rotatably mounted on the bearing piece (1), a rotary power source (3) fixed on the bearing piece (1), and a transmission assembly which is connected between the output shaft (2) and the rotary power source (3) and transmits the power of the rotary power source (3) to the output shaft (2);

the transmission assembly is provided with at least one stage of planetary gear set, namely a first planetary gear set (41); the first planetary gear set (41) includes: the planetary gear set comprises a rotatable first planet carrier (411), a group of first planet gears (412) which are circumferentially distributed and arranged on the first planet carrier (411), a first gear ring (413) which is positioned on the periphery of the first planet carrier (411) and is meshed with the first planet gears (412), and a first sun gear (414) which is positioned in the center of the first planet carrier (411) and is meshed with the first planet gears (412); the first sun gear (414) is connected upstream of the power, the first planet carrier (411) is connected downstream of the power;

the manual-automatic integrated rotation actuator further comprises: a friction member (51) adjacent to the first ring gear (413), and a pressing device (52) driving the friction member (51) to move; the first gear ring (413) is provided with a first friction surface (4131) in the circumferential direction, the friction piece (51) is provided with a second friction surface (513), and the pressing device (52) drives the second friction surface (513) to press the first friction surface (4131) in a controllable mode.

2. The automated manual rotation actuator according to claim 1, wherein the friction member (51) has an arc-shaped recess facing the first ring gear (413), the second friction surface (513) is located on an inner wall of the arc-shaped recess, and the first friction surface (4131) is an outer circumferential surface of the first ring gear (413).

3. A manual-automatic rotary actuator according to claim 2, wherein the pressure-applying means (52) is a push-pull electromagnet; the friction piece (51) is installed at the end part of the push-pull electromagnet, and when the push-pull electromagnet is electrified, the friction piece (51) is pushed to extrude the first gear ring (413).

4. The automated manual rotation actuator of claim 1, further characterized in that the transmission assembly further includes a second planetary gear set (42) disposed downstream of the first planetary gear set (41); the second planetary gear set (42) includes: the planetary gear train comprises a rotatable second planet carrier (421), a group of second planet wheels (422) circumferentially and distributively arranged on the second planet carrier (421), a second gear ring (423) positioned on the periphery of the second planet carrier (421) and meshed with the second planet wheels (422), and a second sun gear (424) positioned in the center of the second planet carrier (421) and meshed with the second planet wheels (422); the second sun gear (424) is fixed at the center of the first planet carrier (411), and the second planet carrier (421) is connected with the downstream of power;

the manual-automatic integrated rotation actuator further comprises: the hoop component (6) is elastically clasped on the second gear ring (423); when the torque of the second gear ring (423) exceeds the limit torque generated by the embracing hoop component (6), the second gear ring rotates, and when the torque of the second gear ring (423) does not exceed the limit torque generated by the embracing hoop component (6), the second gear ring is static.

5. The automated manual rotary actuator according to claim 4, wherein the hoop assembly (6) has a pair of half hoop bodies (61) which are mutually hooped, adjusting bolts (62) are arranged at the joints of the half hoop bodies (61) for connection, and a compression spring (63) is sleeved at both ends of each adjusting bolt (62), and the compression spring (63) applies pressing force to the half hoop bodies (61) from both ends.

6. The automated manual rotation actuator according to claim 5, wherein the hoop assembly (6) is in floating engagement with the carrier (1); the bearing piece (1) is provided with a floating groove (11); the two sides of each half hoop body (61) are parallel and are in sliding fit in the floating groove (11).

7. The automated manual rotation actuator according to claim 6, wherein the floating groove (11) is open at the end to form a passage for screwing an adjusting bolt (62) to adjust tightness.

8. The automated manual rotation actuator according to claim 6, wherein the second gear (423) has an undulating pattern on the outer periphery, and the inner wall of the semi-hoop body (61) has an undulating pattern.

9. The automated manual rotation actuator of claim 4, wherein the transmission assembly further comprises a reduction gear box (43); the input end of the reduction gear box (43) is connected with the second planet carrier (421), and the output end of the reduction gear box (43) is provided with a first bevel gear (44); the output shaft (2) is provided with a second bevel gear (45); the first bevel gear (44) is in meshed transmission connection with the second bevel gear (45).

10. The automated manual rotation actuator according to claim 1, further comprising an angular displacement measuring unit for measuring a rotation angle of the output shaft (2).

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