CN216589820U - Overload protection device, transmission device and closestool - Google Patents

Abstract

The embodiment of the application provides an overload protection device, and the overload protection device comprises a shaft sleeve, a friction shaft and a first elastic hoop. The friction shaft is sleeved in the mounting hole and provided with a second transmission connecting part; the first elastic hoop comprises a first clamping groove, the first free end and the second free end are bent to form a first annular body capable of being elastically expanded or contracted, the sectional area of the first annular body is smaller than the outer diameter of the friction shaft, the outer wall of the friction shaft is sleeved with the first annular body, and when at least one of the first clamping position and the second clamping position is overloaded, the sectional area of the first annular body is expanded, so that the first annular body and the friction shaft slip. The overload protection device can transmit power, and the power is transmitted and disconnected through the first annular body and the friction shaft when the torsion is overloaded, so that the loss caused by overload is avoided. The application also provides a transmission device and a toilet.

Description

Overload protection device, transmission device and closestool

Technical Field

The application relates to the technical field of transmission equipment, in particular to an overload protection device, a transmission device and a closestool.

Background

In the mechanical transmission process, the transmission mechanism generally comprises a driving end, a transmission assembly and a movable end. In the transmission process, the driving end moves and transmits power to the transmission assembly, and the transmission assembly transmits the power to the movable end so that the movable end performs corresponding actions. When the driving end drives the movable end to move and is limited to a certain degree, the driving end cannot complete driving action, at the moment, overload is easily generated, and the driving end or the whole mechanical structure is damaged in serious cases.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an overload protection device, a transmission device and a closestool so as to improve the technical problem.

In a first aspect, an embodiment of the present application provides an overload protection apparatus, including: the friction shaft comprises a shaft sleeve, a friction shaft and a first elastic hoop. The shaft sleeve is provided with a mounting hole, a first clamping groove is formed in the inner wall which encloses the mounting hole, and the shaft sleeve is further provided with a first transmission connecting part; the friction shaft is sleeved in the mounting hole and provided with a second transmission connecting part; and the first elastic hoop comprises a first free end and a second free end, the first free end and the second free end are bent to form a first annular body capable of being elastically expanded or contracted, the outer wall of the friction shaft is sleeved with the first annular body, the first free end extends out towards the outer side of the annular body to form a first clamping position, the second free end extends out towards the outer side of the annular body to form a second clamping position, and one or both of the first clamping position and the second clamping position is abutted against the first clamping groove.

When at least one of the first clamping position and the second clamping position is overloaded by torsion, the sectional area of the first annular body is expanded, so that the first annular body and the friction shaft can slip.

In some embodiments, the first annular body has a cross-sectional area that is less than a cross-sectional area of the friction shaft.

In some embodiments, a portion of the first annular body adjacent to the first free end is provided with a first through slot, the second free end protrudes toward the outside of the first annular body after passing through the first through slot, and the second free end is movable in the first through slot to increase or decrease the elastic sectional area of the first annular body.

In some embodiments, the first resilient hoop is generally annular and is formed of an integrally formed resilient metallic material.

In some embodiments, a second clamping groove is formed in the inner wall which encloses the mounting hole, the overload protection device further includes a second elastic hoop, the second elastic hoop includes a third free end and a fourth free end, the third free end and the fourth free end are bent to enclose a second annular body which can be elastically expanded or contracted, the second annular body is sleeved on the outer wall of the friction shaft, the third free end extends towards the outer side of the annular body to form a third clamping position, the fourth free end extends towards the outer side of the annular body to form a fourth clamping position, and one or both of the third clamping position and the fourth clamping position abuts against the second clamping groove;

when at least one of the third clamping position and the fourth clamping position is overloaded by torsion, the sectional area of the second annular body is expanded, so that the second annular body and the friction shaft can slip.

In some embodiments, the cross-sectional area of the second annular body is less than or equal to the outer diameter of the friction shaft.

In some embodiments, the first annular body and the second annular body are disposed side-by-side.

In some embodiments, the first and second card slots are arranged centrally symmetrically along the axis of the mounting hole.

In some embodiments, the overload protection device further comprises a pin shaft, and the pin shaft penetrates through and is connected with the shaft sleeve and the friction shaft along the axial direction of the mounting hole.

In a second aspect, the present mode provides a transmission comprising: casing, transmission group and output shaft. The transmission group is arranged in the shell, is used for receiving external power and transmitting the external power outwards, comprises any overload protection device, and is connected with the external power in a transmission way; and the output shaft is in transmission connection with the second transmission connecting part, and at least part of the output shaft extends out of the shell.

In a third aspect, the present application proposes a toilet comprising: a base; the toilet cover comprises a main body and a rotating component, wherein the main body is arranged on the base; the driving device is arranged on the main body; the driving device is in transmission connection with the first transmission connecting portion, and the output shaft is in transmission connection with the rotating component, so that the rotating component rotates relative to the main body under the driving of the driving device.

The overload protection device that this application embodiment provided is through the cover be equipped with first elasticity hoop that can enlarge on the outer wall of friction axle to stop the position through first position and the second on the axle sleeve and promote first screens or the second screens on the first elasticity hoop and make the rotatory transmission moment of torsion of hoop, and when the torsion that receives in at least one of first screens and the second screens transships, the sectional area expansion of first ring body, so that first ring body and friction axle skid, realized overload protection's function. The closestool that this application embodiment provided is connected with drive arrangement including the transmission that is provided with overload protection device, and when the rotating assembly motion of toilet lid was limited, avoided drive arrangement to take place to transship through overload protection device, realized protection drive arrangement's function.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a toilet according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a transmission device in a toilet according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram illustrating a structure of a transmission set in a transmission device in a toilet according to an embodiment of the present disclosure;

FIG. 4 is an exploded view of an overload protection structure in a toilet according to an embodiment of the present disclosure;

fig. 5 is a schematic structural view of a first elastic hoop in an overload protection structure in a toilet according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural view of a second elastic hoop in an overload protection structure of a toilet according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a shaft sleeve in an overload protection structure in a toilet provided by an embodiment of the application.

Fig. 8 is a sectional view of an overload protection structure in a toilet according to an embodiment of the present disclosure.

Detailed Description

In order to make the technical solution better understood by those skilled in the art, the technical solution in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the present application, are within the scope of protection of the present application.

In this application, the terms "mounted," "connected," "secured," and the like are to be construed broadly unless otherwise specifically stated or limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through the inside of two elements, or they may be connected only through surface contact or through surface contact of an intermediate member. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "first," "second," and the like are used merely for distinguishing between descriptions and not intended to imply or imply a particular structure. The description of the terms "some embodiments," "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the application. In this application, the schematic representations of the terms used above are not necessarily intended to be the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples and features of the various embodiments or examples described in this application can be combined and combined by those skilled in the art without conflicting.

The embodiment provides a toilet 1, which comprises a base 2, a toilet cover 3, a transmission device 4 and a driving device 5. Referring to fig. 1 and 2, a urinal is formed on the base 2, and the urinal has an opening 21. The toilet lid 3 includes a main body 32 and a rotating member 31. As an embodiment, the main body 32 is provided to the base 2 and is used to fix the rotating member 31. As just one example, in the present embodiment, the rotating member 31 may be a cover plate in the toilet lid 3, and the main body 32 may be a base of the toilet 1. The rotation member 31 may be hinged and relatively rotated with respect to the body 32, and the rotation member 31 selectively closes or opens the opening 21 during the rotation. The driving device 5 is used for connecting with the transmission device 4 and driving the rotating component 31 to rotate through the transmission device 4.

Since the driving device 5 is directly connected to the rotating member 31 and the driving device 5 requires a large torque when driving the rotating member 31 to move, a speed reduction mechanism may be provided between the rotating members 31 of the driving device 5 to increase the torque of the driving device 5. In the present embodiment, the driving device 5 is connected to the rotating member 31 via the transmission 4, thereby achieving an effect of increasing the torque of the driving device 5. Referring to fig. 2, the transmission device 4 includes a housing 41, a transmission set 43 and an output shaft 42. In the present embodiment, the transmission set 43 is disposed in the housing 41, and the housing 41 is disposed on the base. The transmission set 43 comprises an overload protection device 100, the overload protection device 100 being connected to the output shaft 42 and being adapted to protect the drive means 5 against overload.

The housing 41 is used for mounting the transmission set 43 and protecting the transmission set, so as to avoid the problems of rusting and the like caused by the influence of external environmental factors on the transmission set 43. An accommodating cavity is formed in the housing 41, the transmission group 43 is arranged in the accommodating cavity, and the output shaft 42 at least partially extends out of the housing 41 and is used for being in transmission connection with the rotating component 31. In some embodiments, the housing 41 may also be used to secure the drive train 43. As an embodiment, as shown in fig. 2, the housing 41 may include a front case 411, a middle case 412, and a rear case 413. Mounting ports are formed at opposite sides of the middle case 412, and the front case 411 and the rear case 413 are connected to and close the mounting ports, respectively, so that the interiors of the middle case 412 and a portion of the rear case 413 together form a receiving chamber. In other embodiments, the front housing 411, the middle housing 412 and the rear housing 413 may also be integrally combined, and are not limited herein. In this embodiment, the front shell 411, the middle shell 412 and the rear shell 413 may be connected by screws, or may be directly welded in some other embodiments, which is not limited herein. A through hole may be provided in the front case 411 so that a part of the output shaft 42 can protrude out of the housing 41 from the first through hole. As an implementation mode, can also set up sealing washer 4111, output shaft 42 wears to locate sealing washer 4111, and sealing washer 4111 is used for sealing the clearance between first through-hole and the output shaft 42 to the messenger holds the intracavity and forms inclosed space, avoids moist air to get into and holds the chamber and cause transmission group 43 rust scheduling problem. In some embodiments, the driving device 5 may also be disposed within the housing 41.

The transmission set 43 is used for receiving the external power generated by the driving device 5 and transmitting the external power to the outside. In the present embodiment, the driving device 5 is connected to the transmission group 43, and the output shaft 42 is drivingly connected to the rotating member 31. The transmission group 43 can drive the rotating member 31 through the output shaft 42 to open or close the opening 21 after reducing the rotation speed of the driving device 5 and increasing the torque thereof. Referring to fig. 3, in this embodiment, as a specific embodiment, the transmission set 43 may include a fixed bracket 431 and a gear set. The gear set includes a worm 432, a worm gear 433, a first fulcrum 434, a second fulcrum 435, a first duplicate gear 436, a second duplicate gear 437, a first intermediate gear 438, a second intermediate gear 439, and an output gear 4310. The first pivot 434 and the second pivot 435 can be fixedly connected to the housing 41. The fixing bracket 431 may be fixedly connected to the housing 41, and the worm 432 and the worm wheel 433 are provided to the fixing bracket 431. The worm 432 is adapted to receive power from the driving device 5 and can be rotated by the driving device 5. The worm 432 is meshed with and in transmission connection with the worm wheel 433. The first intermediate gear 438 may be coaxially disposed and drivingly connected to the worm gear 433. The first dual gear 436 is mounted on the first supporting shaft 434, and a big gear disc and a small gear disc are coaxially and fixedly disposed on the first dual gear 436, wherein the number of teeth of the small gear disc is less than that of the big gear disc. The first intermediate gear 438 meshes with a large gear plate on the first dual gear 436 and drives the first dual gear 436 to rotate. The number of teeth of the first intermediate gear 438 can be less than the number of teeth of the big-toothed disc on the first dual gear 436, such that the gear ratio between the first intermediate gear 438 and the first dual gear 436 is less than 1. The second dual gear 437 is mounted on the second pivot 435, and a big gear disc and a small gear disc are coaxially and fixedly disposed on the second dual gear 437, wherein the number of teeth of the small gear disc is smaller than that of the big gear disc. The smaller cog on the first duplicate gear 436 meshes with the larger cog on the second duplicate gear 437. Because the big fluted disc and the small fluted disc on the first duplicate gear 436 are coaxially and fixedly arranged, the transmission ratio of the small fluted disc on the first duplicate gear 436 to the big fluted disc on the second duplicate gear 437 is less than 1. The second intermediate gear 439 is also sleeved on the first supporting shaft 434, but is not fixedly connected with the first dual gear 436. The small toothed disc on the second duplicate gear 437 engages with the second intermediate gear 439 and drives the second intermediate gear 439 to rotate. The number of teeth on the small gear plate on the second double gear 437 is smaller than that of the second intermediate gear 439, and the gear ratio between the second double gear 437 and the second intermediate gear 439 is also smaller than 1. The second intermediate gear 439 is simultaneously meshed with the output gear 4310, and the output gear 4310 is coaxially disposed and fixedly connected with the output shaft 42. Since the gear ratios of the multiple gear transmissions are all smaller than 1, the rotational speed transmitted by the transmission group 43 upon receiving power from the driving device 5 is reduced, and the torque is increased, and then transmitted outward by the output shaft 42.

In other embodiments, the transmission set may also be configured as a crank and rocker structure, the driving device 5 may drive the crank to rotate, one end of the rocker may be connected to one side of the crank, and the other end of the rocker is connected to the rotating component 31 in a transmission manner, and can also drive the rotating component 31 to rotate around the main body 32, which is not limited in this embodiment.

The rotation member 31 is stopped when it is rotated to a proper position, and the rotation of the driving device 5 is restricted. The control of the driving device 5 can be realized by accurately detecting the rotation angle of the driving device 5, but since the rotation speed of the driving device 5 is high, a relatively precise sensing component is required to be installed on the driving device 5, the cost of the relatively precise sensing component is high, and thus the cost in the production process is high. Thus, as an embodiment, a less accurate sensor 4321 may be provided relative to the output shaft 42, and the less accurate sensor 4321 may cost less than a more accurate sensing component. The sensor 4312 may be electrically connected to the driving device 5 and configured to detect a rotation angle of the output shaft 42. When the output shaft 42 is rotated to rotate the rotary member 31 to the proper position, the sensor 4312 may signal the driving device 5 and stop the rotation of the driving device 5 to stop the rotary member 31 at the proper position.

Since the rotating member 31 is in transmission connection with the driving device 5 through the transmission set 43, when the rotating member 31 receives an external force during movement to prevent the rotating member 31 from rotating, or when the rotating member 31 is forcibly driven to rotate by the external force while the driving device 5 is not in operation, the driving device 5 may generate an overload phenomenon to cause overheating or damage to the mechanical structure of the toilet 1, and therefore, the transmission set 43 of the present embodiment further includes the overload protection device 100. The overload protection apparatus 100 is provided with a first transmission connecting portion 92 and a second transmission connecting portion 82, and the first transmission connecting portion 92 is connected to the turbine 433 and drives the turbine to rotate. The second transmission connection 82 is drivingly connected to the first duplicate gear 436 for receiving external power.

Referring to fig. 4, the overload protection apparatus 100 includes a bushing 90, a friction shaft 80, and a first elastic hoop 70. The shaft sleeve 90 is provided with a mounting hole 91, the inner wall surrounding the mounting hole 91 is provided with a first stop 901 and a second stop 902, and the first transmission part is arranged on the shaft sleeve 90. The friction shaft 80 is sleeved in the mounting hole 91, and the second transmission connecting portion 82 is disposed on the friction shaft 80. The first elastic hoop 70 is sleeved on the friction shaft 80 and selectively fixed or slipped with the friction shaft 80 by using a first stop 901 and a second stop 902.

The friction shaft 80 is a substantially cylindrical shaft body and has an outer wall 81. The friction shaft 80 is adapted for driving connection with the first intermediate gear 438. The second transmission connecting portion 82 is provided at one end of the friction shaft 80, and outputs power to the outside. In this embodiment, the second transmission connection 82 may be connected to a first dual gear 436. In other embodiments, the second transmission portion connecting portion 82 may also be some other transmission structure, such as a sprocket or a roller, which is not limited herein. In order to prevent the friction shaft 80 from jumping during rotation, in some embodiments, a first shaft hole 83 is penetratingly provided along an axial position of the friction shaft 80, and the friction shaft 80 may be prevented from jumping during rotation by preventing the axial line of the first shaft hole 83 from being deviated during rotation.

Referring to fig. 5, the first resilient hoop 70 is generally ring-shaped and is formed of an integrally formed resilient metal material, including a first free end 71 and a second free end 72. The first free end 71 and the second free end 72 are bent to form a first annular body 73 which can be elastically expanded or contracted. The first annular body 73 has a sectional area smaller than the outer diameter of the friction shaft 80 in a natural state. By expanding the first annular body 73, the first annular body 73 may be sleeved on the outer wall 81 of the friction shaft 80. After the first annular body 73 is deformed and expanded, the first annular body 73 is contracted by a restoring force, and the outer wall 81 of the friction shaft 80 is clamped in the contraction process, so that the first elastic hoop 70 and the friction shaft 80 are connected by the friction force between the inner side of the first annular body 73 and the outer wall 81 of the friction shaft 80.

In the present embodiment, a portion of the first annular body 73 adjacent to the first free end 71 is provided with a first through slot 74, the second free end 72 protrudes toward the outside of the first annular body 73 after passing through the first through slot 74, and the second free end 72 is movable in the first through slot 74 to elastically expand or contract the first annular body 73. In other embodiments, after the first free end 71 and the second free end 72 are bent, the first free end 71 and the second free end 72 can be arranged in parallel along the axial direction of the first annular body 73, and the first free end 71 and the second free end 72 can slide relative to each other, so that the first annular body 73 can also be elastically expanded or contracted.

In the present embodiment, the first free end 71 extends outward of the first annular body 73 to form a first detent 711, and the second free end 72 extends outward of the first annular body 73 to form a second detent 721. By pushing the first detent 711 or the second detent 721, the first elastic ring 70 can be driven to rotate clockwise or counterclockwise along the axial direction. Since the first elastic ring 70 is connected to the friction shaft 80 by friction, when the first elastic ring 70 is rotated by the torque passing through the first detent 711 or the second detent 721, the friction shaft 80 can be driven to rotate by the first elastic ring 70 by friction, so that the torque can be transmitted. When at least one of the first detent 711 and the second detent 721 is overloaded by a torque force, the first free end 71 and the second free end 72 move relatively by the torque force through the first detent 711 and the second detent 721, so that the first annular body 73 deforms and expands in cross-sectional area. After the sectional area of the first elastic hoop 70 is expanded, the friction shaft 80 is loosened, the friction force between the first annular body 73 and the friction shaft 80 is reduced, so that the first annular body 73 and the friction shaft 80 slip, the first elastic hoop 70 does not drive the friction shaft 80 to rotate any more, and the function of disconnecting the transmission connection is realized.

When torque is transmitted to the friction shaft 80 only by the first elastic hoop 70, the first elastic hoop 70 needs to bear a large torque, so that the first elastic hoop 70 has a large volume, and accordingly, the diameter of the friction shaft 80 is large, which results in high production cost. Meanwhile, when only the first elastic ring hoop 70 is used, since the first locking portion 711 and the second locking portion 721 are biased to one side of the first annular body 73, the position of the elastic ring hoop transmitting the torque to the friction shaft 80 is easily concentrated to one side of the friction shaft 80 after transmitting the torque for a long time, which causes eccentric wear. In some embodiments, the overload protection device 100 also includes a second resilient hoop 60.

Referring to fig. 7, the second resilient hoop 60 is substantially annular and includes a third free end 61 and a fourth free end 62. The third free end 61 and the fourth free end 62 are bent to form a second annular body 63 capable of elastically expanding or contracting. The contracted sectional area of the second annular body 63 is smaller than the outer diameter of the friction shaft 80. By expanding the second annular body 63, the second annular body 63 can be sleeved on the outer wall 81 of the friction shaft 80. After the second annular body 63 is deformed and expanded, the second annular body 63 contracts due to the restoring force, and the outer wall 81 of the friction shaft 80 is clamped during contraction, so that the second elastic hoop 60 and the friction shaft 80 are connected by the friction force between the inner side of the second annular body 63 and the outer wall 81 of the friction shaft 80. As an embodiment, the first annular body 73 and the second annular body 63 may be symmetrical along the axial direction of the friction shaft 80 and arranged side by side along the axial direction, so that the outer wall 81 of the friction shaft 80 is uniformly stressed.

In the present embodiment, a portion of the second annular body 63 adjacent to the third free end 61 is provided with a second through groove 64, the fourth free end 62 protrudes toward the outside of the second annular body 63 after passing through the second through groove 64, and the fourth free end 62 is movable within the second through groove 64 to elastically expand or contract the second annular body 63. In other embodiments, after the third free end 61 and the fourth free end 62 are bent, the third free end 61 and the fourth free end 62 may be disposed in parallel along the axial direction of the first ring, and the third free end 61 and the fourth free end 62 may be staggered and slide relative to each other, so as to enable the second ring 63 to elastically expand or contract.

In the present embodiment, the third free end 61 extends toward the outside of the second annular body 63 to form a third detent 611, and the fourth free end 62 extends toward the outside of the second annular body 63 to form a fourth detent 621. By pushing the third detent 611 or the fourth detent 621, the second elastic hoop 60 can be driven to rotate clockwise or counterclockwise along the axial direction. Since the second elastic ring 60 is connected to the friction shaft 80 by friction, when the torque rotates the second elastic ring 60 through the third detent 611 or the fourth detent 621, the friction shaft 80 can be driven to rotate by the second elastic ring 60 by friction, so as to transmit the torque. When at least one of the third detent 611 and the fourth detent 621 is overloaded by the torque force, the third free end 61 and the fourth free end 62 move relatively by the torque force through the third detent 611 and the fourth detent 621, so that the second annular body 63 deforms and expands in cross-sectional area. After the sectional area of the second elastic hoop 60 is expanded, the friction shaft 80 is loosened, the friction force between the second annular body 63 and the friction shaft 80 is reduced, so that the second annular body 63 and the friction shaft 80 slip, the second elastic hoop 60 does not drive the friction shaft 80 to rotate any more, and the function of disconnecting the transmission connection is realized.

In this embodiment, torque is applied to the first elastic hoop 70 and the second elastic hoop 60 simultaneously, and when the torque is overloaded, the torque needs to be a certain magnitude so that the first annular body 73 and the second annular body 63 slip with the outer side of the friction shaft 80 simultaneously. The friction shaft 80 is designed such that it does not need to have an excessively large diameter in order to transmit torque.

The bushing 90 is configured to transmit torque to the first detent 711 and the second detent 721. Referring to fig. 7, the shaft sleeve 90 is substantially cylindrical, and a first transmission connection portion 92 is disposed on the shaft sleeve 90, and the first transmission connection portion 92 is used for receiving external power. In the present embodiment, the first transmission connecting portion 92 may be a worm gear 433, and the worm gear 433 may rotate to drive the sleeve 90 to rotate coaxially along the axis of the worm gear 433. In other embodiments, the second transmission portion connecting portion 82 may also be some other transmission structure, such as a sprocket or a roller, which is not limited herein. The mounting hole 91 is used to dispose the friction shaft 80 and the first elastic hoop 70.

The axis of the mounting hole 91 is coaxially arranged with the axis of the bushing 90, and the diameter of the mounting hole 91 is larger than that of the friction shaft 80 so that the friction shaft 80 can be fitted into the mounting hole 91. As an embodiment, a first locking groove 93 is provided on an inner wall enclosing the mounting hole 91, and the first locking groove 93 may be provided parallel to an axis of the mounting hole 91 and communicate with the mounting hole 91. The first stop 901 and the second stop 902 are disposed opposite to each other in the first slot 93, and one or both of the first block 711 and the second block 721 abut against the first slot 93. In one embodiment, since the first engaging groove 93 communicates with the mounting hole 91, when the friction shaft 80 and the first elastic ring 70 are fitted into the mounting hole 91, the first free end 71 and the second free end 72 are both fitted into the first engaging groove 93, the first engaging portion 711 abuts against the first stopper 901, and the second engaging portion 721 abuts against the second stopper 902. Since the friction shaft 80 is coaxially disposed with the shaft sleeve 90, when the shaft sleeve 90 rotates clockwise, the first stop 901 pushes the first detent 711 to rotate the first elastic hoop 70; when the sleeve 90 rotates counterclockwise, the second stopper 902 pushes the second detent 721 to rotate the first resilient ring 70, thereby driving the friction shaft 80 to rotate. When the clockwise torque is overloaded, the first stopper 901 pushes the first detent 711 to deform the first elastic ring 70 and release the friction shaft 80. When the torque force in the counterclockwise direction is overloaded, the second stopper 902 pushes the second stopper 721 to deform the first elastic hoop 70 and release the friction shaft 80, thereby implementing the overload protection function.

In some embodiments, the bushing 90 also functions to transmit torque to the third detent 611 and the fourth detent 621. The mounting hole 91 may also be used to provide a second resilient collar 60. A second locking groove 94 is formed on the inner wall of the mounting hole 91, and the second locking groove 94 may be parallel to the axis of the mounting hole 91 and is communicated with the mounting hole 91. The first and second locking grooves 93 and 94 may be disposed along an axis of the mounting hole 91 with central symmetry, and in other embodiments, the first and second locking grooves 93 and 94 may be disposed at an angle along the axis of the mounting hole 91, which is not limited herein. The third stop 903 and the fourth stop 904 are disposed in the second slot 94, and one or both of the third detent 611 and the fourth detent 621 abuts against the second slot 94. In one embodiment, since the second locking groove 94 communicates with the mounting hole 91, when the friction shaft 80 and the second elastic hoop 60 are inserted into the mounting hole 91, the third free end 61 and the fourth free end 62 are inserted into the second locking groove 94, the third locking position 611 abuts against the third stop 903, and the fourth locking position 621 abuts against the fourth stop 904. Since the friction shaft 80 is coaxially disposed with the shaft sleeve 90, when the shaft sleeve 90 rotates clockwise, the third stop 903 pushes the third detent 611 to rotate the second elastic hoop 60; when the sleeve 90 rotates counterclockwise, the fourth stopper 904 pushes the fourth stopper 621 to rotate the second elastic ring 60, so as to drive the friction shaft 80 to rotate. When the clockwise torque is overloaded, the third stopper 903 pushes the third detent 611 to deform the second elastic ring 60 and release the friction shaft 80. When the torque force in the counterclockwise direction is overloaded, the fourth stopping position 904 pushes the fourth stopping block to deform the second elastic hoop 60 and release the friction shaft 80, thereby implementing the overload protection function.

Referring to fig. 8, in some embodiments, in order to prevent the shaft sleeve 90 from jumping during rotation, a second shaft hole 95 is further disposed on the shaft sleeve 90 coaxially with the mounting hole 91, and the shaft of the second shaft hole 95 is not shifted during rotation, so that the shaft sleeve 90 is prevented from jumping during rotation.

The shaft sleeve 90 and the friction shaft 80 do not jump because the first shaft hole 83 and the second shaft hole 95 are not deviated during the rotation, so in some embodiments, the overload protection apparatus 100 may further include the pin 50. The pin shaft 50 passes through and connects the bushing 90 and the friction shaft 80 along the axial direction of the mounting hole 91. The pin 50 may be fixedly connected to the housing 41 and pass through the first shaft hole 83 and the second shaft hole 95. The sleeve 90 and the friction shaft 80 both rotate along the pin 50, so that the rotation generates small jump and the deviation does not occur.

The application principle of the closestool 1 provided by the embodiment of the application is as follows:

when the rotation of the rotating member 31 of the toilet 1 is limited, the first annular body 73 of the first elastic hoop 70 and the second annular body 63 of the second elastic hoop 60 of the overload protection device 100 deform under the torque overload, and no longer clamp the friction shaft 80. The friction force between the first annular body 73 and the second annular body 63 and the friction shaft 80 is reduced, the friction shaft 80 and the first annular body 73 and the second annular body 63 slip relatively, and the first elastic hoop 70 and the second elastic hoop 60 do not transmit the torsion to the friction shaft 80 any more, so that the driving device 5 cannot be damaged by overload.

It should be noted that the overload protection device and the transmission device provided in this embodiment may also be applied to other rotatably assembled components, such as an intelligent curtain driven by a motor, and the like, which is not limited herein.

The above embodiments are only for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. An overload protection apparatus, comprising:

the shaft sleeve is provided with a mounting hole, a first clamping groove is formed in the inner wall which encloses the mounting hole, and the shaft sleeve is further provided with a first transmission connecting part;

the friction shaft is sleeved in the mounting hole and provided with a second transmission connecting part; and

the first elastic hoop comprises a first free end and a second free end, the first free end and the second free end are bent to form a first annular body capable of being expanded or contracted elastically, the first annular body is sleeved on the outer wall of the friction shaft, the first free end extends towards the outer side of the annular body to form a first clamping position, the second free end extends towards the outer side of the annular body to form a second clamping position, and one or both of the first clamping position and the second clamping position abuts against the first clamping groove;

wherein, when at least one of the first detent and the second detent is overloaded with torque, the cross-sectional area of the first annular body increases to cause the first annular body to slip with the friction shaft.

2. The overload protection device of claim 1, wherein the cross-sectional area of the first annular body is less than or equal to the cross-sectional area of the friction shaft.

3. The overload protection device of claim 1, wherein the first resilient hoop is annular and is formed of an integrally formed resilient metal material.

4. The overload protection device according to any one of claims 1 to 3, wherein a portion of the first annular body adjacent to the first free end is provided with a first through slot, and the second free end protrudes toward an outer side of the first annular body after passing through the first through slot, and the second free end is movable within the first through slot to elastically expand or contract the first annular body.

5. The overload protection device according to claim 1, wherein a second locking groove is disposed on an inner wall that encloses the mounting hole, the overload protection device further includes a second elastic hoop, the second elastic hoop includes a third free end and a fourth free end, the third free end and the fourth free end are bent to enclose a second annular body that can elastically expand or contract, the second annular body is sleeved on an outer wall of the friction shaft, the third free end extends toward an outer side of the annular body to form a third locking position, the fourth free end extends toward the outer side of the annular body to form a fourth locking position, and one or both of the third locking position and the fourth locking position abuts against the second locking groove;

wherein, when at least one of the third detent and the fourth detent is overloaded by torque force, the cross-sectional area of the second annular body is expanded to cause the second annular body to slip with the friction shaft.

6. The overload protection device of claim 5, wherein the first annular body and the second annular body are arranged side-by-side.

7. The overload protection device of claim 6, wherein the first and second notches are arranged symmetrically about an axis of the mounting hole.

8. The overload protection device according to claim 1, further comprising a pin passing through the shaft sleeve and connecting the shaft sleeve and the friction shaft along an axial direction of the mounting hole.

9. A transmission, comprising:

a housing;

a transmission set disposed in the housing and adapted to receive external power and transmit the external power to the outside, the transmission set including the overload protection apparatus according to any one of claims 1 to 8, the first transmission connection being adapted to be in transmission connection with the external power; and

the output shaft is in transmission connection with the second transmission connecting part, and at least part of the output shaft extends out of the shell.

10. A toilet, comprising:

a base;

the toilet cover comprises a main body and a rotating component, and the main body is arranged on the base;

a driving device disposed at the main body;

the transmission of claim 9, wherein the drive is drivingly connected to the first drive connection, and the output shaft is drivingly connected to the rotary member for rotation of the rotary member relative to the body upon actuation of the drive.

Images