CN217056215U - Overload protection device, transmission device and closestool - Google Patents

Abstract

The embodiment of the application provides an overload protection device, which comprises a shaft sleeve, a friction shaft and a first torsion spring. The shaft sleeve is provided with a mounting hole, a first stop position and a second stop position are arranged on the inner wall which is enclosed into the mounting hole, and the shaft sleeve is further provided with a first transmission connecting part. The friction shaft sleeve is arranged in the mounting hole, and the friction shaft is provided with a second transmission connecting part. The sectional area of the first torsion spring is smaller than that of the friction shaft, the first torsion spring is sleeved on the outer wall of the friction shaft and provided with a first free end and a second free end, the first free end extends outwards, the first free end abuts against the first stop position, and the second free end abuts against the first stop position. When at least one of the first free end and the second free end is overloaded by the torsion force, the sectional area of the first torsion spring is expanded, so that the first torsion spring and the friction shaft can slip. 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 device 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 can execute corresponding actions. When the driving end drives the movable end to move and is limited to a certain degree, the driving end cannot complete the 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 overload protection device according to an embodiment of the present application includes a shaft sleeve, a friction shaft, and a first torsion spring.

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; the first torsion spring is sleeved on the outer wall of the friction shaft and provided with a first free end and a second free end which extend outwards, and the first free end and the second free end are abutted against the first clamping groove;

wherein, when at least one of the first free end and the second free end is overloaded by a torsion force, a cross-sectional area of the first torsion spring expands to slip the first torsion spring and the friction shaft.

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

In some embodiments, a second clamping groove is disposed on an inner wall surrounding the mounting hole, the overload protection device further includes a second torsion spring, the second torsion spring includes a third free end and a fourth free end, a sectional area of the second torsion spring is smaller than a sectional area of the friction shaft, the second torsion spring is sleeved on an outer wall of the friction shaft, the third free end and the fourth free end abut against the second clamping groove, and when at least one of the third free end and the fourth free end is overloaded, the sectional area of the second torsion spring is expanded to enable the second torsion spring to slip with the friction shaft.

In some embodiments, the first torsion spring is disposed side-by-side with the second torsion spring.

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

In some embodiments, the friction shaft includes a shaft body, a boss is disposed on an outer wall of the shaft body, the second transmission connecting portion is disposed on one side of the boss, the other side of the boss is embedded in the mounting hole, and the boss abuts against the shaft sleeve.

In some embodiments, the first drive connection is disposed at an end of the bushing distal from the second drive connection.

In some embodiments, the overload protection device further includes a pin, and the pin passes through the shaft sleeve and connects the shaft body along the axial direction of the mounting hole.

In a second aspect, the present application provides a transmission comprising: the transmission group is arranged in the shell and used for receiving external power and transmitting the external power outwards, the transmission group comprises any one of the overload protection devices, and the first transmission connecting part is used for being in transmission connection with the external power. 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 also provides a toilet comprising: a base. Toilet lid and above and drive arrangement. The toilet lid includes a main body and a rotating member, the main body is disposed 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 part, so that the rotating part rotates relative to the main body under the driving of the driving device.

The overload protection device that this application embodiment provided, through the cover be equipped with the first torsional spring that can enlarge on the outer wall of friction axle to end the position through the first on the axle sleeve and the second and promote first free end or the second free end on the first torsional spring and make the rotatory transmission moment of torsion of torsional spring, and when the torsion that receives in at least one of first free end or the second free end transships, the sectional area expansion of first torsional spring, so that first torsional spring 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 diagram of a structure 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 diagram of a first torsion spring in an overload protection structure in a toilet according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a shaft sleeve in an overload protection structure in a toilet according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a second torsion spring in the overload protection structure in the toilet according to the embodiment of the present 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 obtained by a person skilled in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In this application, the terms "mounted," "connected," "secured," and the like are to be construed broadly unless otherwise expressly specified 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 solely to distinguish one from another and are not to be construed as referring to or particular structures. 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 being mutually inconsistent.

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 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, a speed reducing mechanism may be provided between the driving device 5 and the rotating member 31 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 that the transmission set 43 is prevented from rusting due to the influence of external environmental factors. 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 manner, a sealing ring 4111 may also be provided, the output shaft 42 penetrates through the sealing ring 4111, and the sealing ring 4111 is used to seal a gap between the first through hole and the output shaft 42, so that a sealed space is formed in the accommodating cavity, and the problems that the transmission group 43 rusts due to the entry of moist air into the accommodating cavity are avoided. In some embodiments, the drive 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 attached within 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 a 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 the large gear disk 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 large gear ring 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 support shaft 435, and a large gear disc and a small gear disc are coaxially and fixedly arranged on the second dual gear 437, wherein the number of teeth of the small gear disc is smaller than that of the large gear disc. A smaller toothed disc on the first dual gear 436 meshes with a larger toothed disc on the second dual gear 437. Since the large toothed disc and the small toothed disc on the first duplicate gear 436 are coaxially and fixedly arranged, the transmission ratio of the small toothed disc on the first duplicate gear 436 to the large toothed disc on the second duplicate gear 437 is less than 1. The second intermediate gear 439 is also sleeved on the first 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 counter gear 439, and the gear ratio between the second double gear 437 and the second counter 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 precise sensing component is required to be installed on the driving device 5, and the cost of the precise sensing component is high, so that 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 rotates to rotate the rotary member 31 to a 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 a 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 connection portion 92 and a second transmission connection portion 82, and the first transmission connection portion 92 is connected to the turbine 433. And drives it in rotation. The second transmission connecting portion 82 is connected to the first dual gear 436 in a transmission manner for receiving external power.

Referring to fig. 4, the overload protection apparatus 100 includes a bushing 90, a friction shaft 80, and a first torsion spring 70. The bushing 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 connecting portion 92 is provided on the bushing 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 torsion spring 70 is sleeved on the friction shaft 80 and selectively fixed to or slid from the friction shaft 80 by using a first stop 901 and a second stop 902.

The friction shaft 80 includes a shaft body 85, and an outer wall of the shaft body 85 is provided with a boss 84 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 one embodiment, the second transmission connection is disposed on one side of the boss 84. The second drive connection 82 may be connected to a first duplicate 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 axis position of the friction shaft 80, and the friction shaft 80 may be prevented from jumping during rotation by preventing an axis of the first shaft hole 83 from being deviated during rotation.

Referring to fig. 5, the first torsion spring 70 includes 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 torsion spring 70 capable of elastically expanding or contracting. The first torsion spring 70 has a sectional area smaller than that of the friction shaft 80 in a natural state. By expanding the first torsion spring 70, the first torsion spring 70 may be sleeved on the outer wall 81 of the friction shaft 80. After the first torsion spring 70 is deformed and expanded, the first torsion spring 70 has a restoring force to contract the first torsion spring 70, and the outer wall 81 of the friction shaft 80 is clamped during the contraction process, so that the first torsion spring 70 and the friction shaft 80 are connected by using the friction force between the inner side of the first torsion spring 70 and the outer wall 81 of the friction shaft 80. The driving of the first torsion spring 70 to rotate clockwise or counterclockwise in the axial direction may be achieved by pushing the first free end 71 or the second free end 72. Since the first torsion spring 70 is connected to the friction shaft 80 by friction, when the first torsion spring 70 is rotated by the first free end 71 or the second free end 72, the first torsion spring 70 can drive the friction shaft 80 to rotate by friction, thereby achieving the torque transmission. When at least one of the first free end 71 or the second free end 72 is overloaded by torsion, the first free end 71 and the second free end 72 move relatively, so that the first torsion spring 70 deforms and expands in cross-sectional area. After the sectional area of the first torsion spring 70 is expanded, the friction shaft 80 is loosened, the friction force between the first torsion spring 70 and the friction shaft 80 is reduced, so that the first torsion spring 70 and the friction shaft 80 slip, the first torsion spring 70 does not drive the friction shaft 80 to rotate any more, and the function of disconnecting the transmission connection is realized.

In one embodiment, the boss 84 may be inserted into the mounting hole 91 at a side away from the second transmission connecting portion 82, the boss 84 abuts against the bushing, and the first transmission connecting portion 92 is disposed at an end of the bushing 90 away from the second transmission connecting portion 82.

When the torque is transmitted to the friction shaft 80 only by the first torsion spring 70, the first torsion spring 70 needs to bear a larger torsion force, which makes the first torsion spring 70 have a larger volume, and accordingly makes the diameter of the friction shaft 80 larger, which makes the production cost larger. Meanwhile, when only the first torsion spring 70 is used, since the first free end 71 and the second free end 72 are biased to one side of the first torsion spring 70, the position where the first torsion spring 70 transmits 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, and the eccentric wear is caused. In some embodiments, the overload protection device 100 also includes a second torsion spring 60.

The second torsion spring 60 includes a third free end 61 and a fourth free end 62. A third free end 61 and a fourth free end 62. The second torsion spring 60 is bent to elastically expand or contract. The second torsion spring 60 has a sectional area smaller than that of the friction shaft 80 in a natural state. By expanding the second torsion spring 60, the second torsion spring 60 can be sleeved on the outer wall 81 of the friction shaft 80. After the second torsion spring 60 is deformed and expanded, the second torsion spring 60 contracts due to restoring force, and the outer wall 81 of the friction shaft 80 is clamped during the contraction process, so that the second torsion spring 60 and the friction shaft 80 are connected by using the friction force between the inner side of the second torsion spring 60 and the outer wall 81 of the friction shaft 80. By pushing the third free end 61 and the fourth free end 62, the second torsion spring 60 can be driven to rotate clockwise or counterclockwise along the axial direction. Since the second torsion spring 60 is connected to the friction shaft 80 by friction, when the second torsion spring 60 is rotated by the third free end 61 or the fourth free end 62, the second torsion spring 60 can drive the friction shaft 80 to rotate by friction, thereby achieving torque transmission. When at least one of the third free end 61 and the fourth free end 62 is overloaded by the torsion force, the third free end 61 and the fourth free end 62 move relatively, so that the second torsion spring 60 deforms and expands in cross-sectional area. After the sectional area of the second torsion spring 60 is expanded, the friction shaft 80 is loosened, the friction force between the second torsion spring 60 and the friction shaft 80 is reduced, so that the second torsion spring 60 and the friction shaft 80 slip, the friction shaft 80 is not driven to rotate by the second torsion spring 60, and the function of disconnecting the transmission connection is realized.

In the present embodiment, the torque is applied to the first torsion spring 70 and the second torsion spring 60 at the same time, and when the torque is overloaded, the torque needs to be a certain magnitude so that the first torsion spring 7 and the second torsion spring 60 slip with the outer side of the friction shaft 80 at the same time. 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 used to transmit torque to the first free end 71 and the second free end 72. 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 power from outside. In the present embodiment, the first transmission connection portion 92 may be a worm gear 433, and the worm gear 433 rotates 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 torsion spring 70.

The axis of the mounting hole 91 is arranged coaxially with the axis of the bushing 90, and the diameter of the mounting hole 91 is larger than the diameter 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 free end 71 and the second free end 72 are inserted into the first card slot 93. The first stop 901 and the second stop 902 are disposed in the first slot 93 opposite to each other. Because the first engaging groove 93 is communicated with the mounting hole 91, when the friction shaft 80 and the first torsion spring 70 are inserted into the mounting hole 91, the first free end 71 and the second free end 72 are inserted into the first engaging groove 93, the first free end 71 abuts against the first stop 901, and the second free end 72 abuts against the second stop 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 free end 71 to rotate the first torsion spring 70; when the hub 90 rotates counterclockwise, the second stop 902 pushes the second free end 72 to rotate the first torsion spring 70, thereby driving the friction shaft 80 to rotate. When the clockwise torsion is overloaded, the first stop 901 pushes the first free end 71 to deform the first torsion spring 70 and release the friction shaft 80. When the counterclockwise torque force is overloaded, the second stop 902 pushes the second free end 72 to deform the first torsion spring 70 and release the friction shaft 80, thereby achieving the overload protection function.

In some embodiments, bushing 90 also serves to transmit torque to third free end 61 and fourth free end 62. The mounting hole 91 may also be used to position a second torsion spring 60. A second locking groove 94 is formed in the inner wall of the mounting hole 91, and the third free end 61 and the fourth free end 62 are inserted into the second locking groove 94. As an embodiment, the second catching groove 94 may be disposed parallel to an axis of the mounting hole 91 and communicate 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. Because the second engaging groove 94 is communicated with the mounting hole 91, when the friction shaft 80 and the second torsion spring 60 are inserted into the mounting hole 91, the third free end 61 and the fourth free end 62 are inserted into the second engaging groove 94, the third free end 61 abuts against the third stop 903, and the fourth free end 62 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 free end 61 to rotate the second torsion spring 60; when the sleeve 90 rotates counterclockwise, the fourth stop 904 pushes the fourth free end 62 to rotate the second torsion spring 60, thereby driving the friction shaft 80 to rotate. When the clockwise torque is overloaded, the third stop 903 pushes the third free end 61 to deform the second torsion spring 60 and release the friction shaft 80. When the torque force in the counterclockwise direction is overloaded, the fourth stopper 904 pushes the fourth stopper to deform the second torsion spring 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 coaxially formed in the shaft sleeve 90 with the mounting hole 91, and an axis of the second shaft hole 95 is not deviated during rotation, so that the shaft sleeve 90 does not jump 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 torsion spring 70 and the second torsion spring 60 of the overload protection device 100 are deformed when the torsion force is overloaded, and no longer clamp the friction shaft 80. The friction force between the friction shafts 80 and the first and second torsion springs 70 and 60 is reduced, the friction shafts 80 and the first and second torsion springs 70 and 60 slip relatively, and the first and second torsion springs 70 and 60 do not transmit the torsion force to the friction shaft 80 any more, so that the driving device 5 is not 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 (9)

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 torsion spring is sleeved on the outer wall of the friction shaft and provided with a first free end and a second free end which extend outwards, and the first free end and the second free end are embedded into the first clamping groove;

when at least one of the first free end and the second free end is overloaded by torque, one of the first free end and the second free end abuts against the first clamping groove, and the sectional area of the first torsion spring is expanded, so that the first torsion spring and the friction shaft can slip.

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

3. The overload protection device according to claim 1, wherein a second locking groove is formed in an inner wall of the mounting hole, the overload protection device further comprises a second torsion spring, the second torsion spring comprises a third free end and a fourth free end, a sectional area of the second torsion spring is smaller than a sectional area of the friction shaft, the second torsion spring is sleeved on an outer wall of the friction shaft, and the third free end and the fourth free end are inserted into the second locking groove in a propping manner, wherein when at least one of the third free end and the fourth free end is overloaded, the sectional area of the second torsion spring is expanded, so that the second torsion spring and the friction shaft slip.

4. The overload protection device of claim 3, wherein the first torsion spring is positioned side-by-side with the second torsion spring.

5. The overload protection device of claim 3, wherein the first and second card slots are arranged centrally symmetrically along the axis of the mounting hole.

6. The overload protection device of claim 1, wherein the first drive connection is disposed at an end of the bushing distal from the second drive connection.

7. 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.

8. A transmission, comprising:

a housing;

a transmission set disposed in the housing and adapted to receive external power and transmit the power to the outside, the transmission set comprising the overload protection apparatus as claimed in any one of claims 1 to 7, 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.

9. 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 8, wherein the drive means is drivingly connected to the first drive connection, and the output shaft is drivingly connected to the rotary member for rotating the rotary member relative to the body upon actuation of the drive means.

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