Torque limiter, flip machine and closestool
By designing coaxially arranged coil springs and positioning components in the torque limiter, the problems of torque consistency and assembly are solved, precise control of torque transmission and component protection are achieved, and the assembly process is simplified.
Patent Information
- Application Number
- CN202423218786.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-12-25
AI Technical Summary
The existing torque limiter has poor consistency in forward and reverse working torque and poor assembly processability, resulting in inconsistent fatigue life of torsion springs in different directions and strict requirements on installation direction.
A torque limiter is designed, in which a first component, a second component, a coil spring and a positioning component are coaxially arranged along the same axis, the two ends of the coil spring extend axially, the positioning component is connected to the second component to form an accommodating space, and the coil spring slips when the torque exceeds a threshold, interrupting torque transmission, thereby achieving consistent end deformation and symmetrical assembly.
The service life consistency of the coil spring in the forward and reverse directions is ensured, the assembly process is simplified, the radial size and space requirement of the torque limiter are reduced, and precise control of torque transmission and protection of components are achieved.
Smart Images
Figure CN223411316U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a torque limiter, comprising a first component, a second component, a coil spring, and a positioning component, wherein the first component, the second component, the coil spring, and the positioning component are coaxially arranged along the same axis. The utility model also relates to a flip-top machine having such a torque limiter and a toilet having such a flip-top machine. Background Art
[0002] Torque limiters are commonly found in applications involving torque transmission, such as flap and door-opening mechanisms. Under normal circumstances, torque is transmitted through the torque limiter. However, in the event of an abnormality, such as a user operating the device violently, the torque applied to the torque limiter exceeds a threshold, causing the transmission components to slip relative to each other, thereby interrupting the torque transmission path and protecting the transmission mechanism and actuator (motor) from overload damage. Once the applied torque falls within the threshold, the slippage ceases, and the torque limiter resumes normal operation.
[0003] The prior art discloses friction torque limiters that use a torsion spring to hold the shaft. In some designs, one end of the torsion spring extends axially, while the other end extends radially. This design has the following main problems:
[0004] The torque limiter has poor consistency in forward and reverse working torque. Because the torsion spring's two ends extend in different ways, the degree of deformation caused by the spring's contact with the mating structure is also inconsistent during operation. This results in inconsistent working torque in the forward and reverse directions of torque transmission, and in turn, inconsistent fatigue life in the forward and reverse directions. This means that the torsion spring may reach its service life in one direction of torque transmission but not in the opposite direction.
[0005] Poor assembly processability. In this design, the torsion spring can be installed on the shaft barrel from either end, but one end of the torsion spring extends axially and the other end extends radially. Therefore, there is only one correct installation direction relative to the component that matches and fixes the torsion spring. If the installation direction on the shaft barrel is incorrect, further installation will be impossible. Utility Model Content
[0006] The technical problem to be solved by the present invention is to propose a torque limiter, a lid opening machine and a toilet with the torque limiter, which at least partially overcome the shortcomings of the prior art.
[0007] According to the present invention, a torque limiter is now proposed, which includes a first component, a second component, a coil spring and a positioning component, wherein the first component, the second component, the coil spring and the positioning component are coaxially arranged along the same axis, the coil spring having a spring body and a first end and a second end extending from the spring body in the axial direction, wherein the spring body is tightly wound around at least a portion of the outer circumference of the first component, and the positioning component is connected to the second component and thereby forms an accommodating space for accommodating the coil spring and at least a portion of the first component, so that when the second component applies a tangential force relative to the axis on the first end, the first component can rotate in a first direction, and when the positioning component applies a tangential force relative to the axis on the second end, the first component can rotate in an opposite second direction, wherein when the torque transmitted through the torque limiter is greater than a threshold value, the spring body slips on at least a portion of the outer circumference of the first component and thereby interrupts the transmission of the torque.
[0008] In a torque limiter, a first component is designed to output torque directly or indirectly input from a second component to another component, such as a flip cover, wherein the first component is driven by a coil spring having a spring body wound around at least a portion of an outer circumference of the first component, so that the two ends of the coil spring extending from the spring body, i.e., the first end and the second end, can drive the first component wound around the spring body to rotate when respectively subjected to tangential forces. Specifically, for example, when a tangential force (or at least a force having a tangential component) relative to the axis is applied to the first end of the coil spring, the first component can be rotated in a first direction, and when a tangential force relative to the axis is applied to the second end, the first component can be rotated in an opposite second direction.
[0009] Because this torque transmission is based on the coil spring being wound or gripped around the first component, if an abnormal condition occurs, such as when the torque to be transmitted exceeds a predetermined threshold, the coil spring can no longer grip the first component, causing relative rotation, or slip, between the two components. This interrupts the transmission of torque exceeding the threshold, thereby protecting related components, such as the motor. These abnormal conditions and torque transmission interruptions primarily include the following three scenarios:
[0010] 1. The torque input from the motor, for example, directly or indirectly through the second component, is too large. In this case, the first or second end of the coil spring is subjected to too large a tangential force, causing the spring body to slip on the first component, thereby interrupting the torque transmission.
[0011] 2. A torque opposite to the currently transmitted torque is input from the first component. For example, in the case of a flip cover, a user may manually close or open a flip cover that is automatically opening. In this case, the first or second end of the coil spring abuts against a corresponding portion of the second component or the positioning member, causing the coiled spring to unwind on the first component, thereby interrupting the torque transmission.
[0012] 3. A torque exceeding a threshold value is input from the first component in the same direction as the currently transmitted torque. For example, in the case of a flip cover, a user may manually open the cover more quickly than it is automatically opening, or close the cover more quickly than it is automatically closing. In this case, the spring body may slip on the first component, interrupting torque transmission.
[0013] In the torque limiter according to the present invention, the first and second ends of the coil spring extend axially from the spring body, and the positioning member is connected to the second member, thereby forming a storage space that accommodates the coil spring and at least a portion of the first member. This design ensures that both ends of the coil spring deform to the same degree when subjected to force, thereby ensuring a suitable service life for the coil spring as a whole. Furthermore, since both ends of the coil spring extend axially, a certain degree of symmetry is achieved, eliminating the need to consider the correct installation orientation during assembly. Furthermore, the radial size of the coil spring is reduced. Accommodating it, along with the first member, in the space formed by the connection between the positioning member and the second member further reduces the space required by the torque limiter, achieving a radially compact design.
[0014] In an advantageous design, the second component is constructed with a barrel, on which a first circumferential limit portion extending along the axis is constructed, and the positioning component is constructed with a third circumferential limit portion, and the first circumferential limit portion and the third circumferential limit portion are in shape matching and thereby fix the second component and the positioning component to each other in the circumferential direction. The shape matching of the first circumferential limit portion and the third circumferential limit portion can be designed in a variety of ways. For example, the first circumferential limit portion can be designed as a notch extending along the axial direction on the barrel wall of the barrel, and correspondingly, the third circumferential limit portion can be designed as a protrusion on the positioning component that can be stuck in the notch, thereby simply achieving that the two components cannot rotate relative to each other when they are joined. Of course, alternatively, the first circumferential limit portion can be designed as a protrusion, and the third circumferential limit portion can be designed as a corresponding notch.
[0015] In a favorable design, a first axial limit portion is constructed on the barrel, and a fourth axial limit portion is constructed on the positioning component. The first axial limit portion and the fourth axial limit portion are matched in shape and thereby fix the second component and the positioning component to each other in the axial direction. In order to design the torque limiter to be more compact and independent, in addition to fixing the second component and the positioning component to each other in the circumferential direction, the two components are also designed to be fixed to each other in the axial direction. There are many designs for the shape matching of the first axial limit portion and the fourth axial limit portion. For example, the first axial limit portion can be designed as a groove on the barrel, and the fourth axial limit portion can be designed as a snap-fit portion that can be engaged with the groove, thereby simply achieving that when the second component and the positioning component are engaged, the two cannot move relative to each other in the axial direction.
[0016] In one advantageous design, the barrel has a bottom at one end, on which is formed a first annular protrusion protruding axially into the barrel. A first recess extending circumferentially is formed above the first annular protrusion. The coil spring is accommodated in the accommodation space formed by the connection between the positioning component and the second component. To this end, a corresponding structure is provided on the bottom of the barrel of the second component. This makes the entire device more compact, suitable for use in limited spaces, and achieves efficient function. Specifically, the annular protrusion provides stable support for the main body of the coil spring, while the recess positions the end of the coil spring, preventing it from shifting or misaligning during twisting. Furthermore, the provision of the annular protrusion on the bottom of the barrel increases the structural strength and rigidity of the second component. Finally, the design of the annular protrusion and recess facilitates alignment of the coil spring and, if necessary, other components, simplifying the assembly process. Preferably, the first annular protrusion is designed to protrude from the bottom of the barrel, conforming to the barrel wall, into the barrel, thereby providing more stable support for the coil spring.
[0017] In one advantageous design, the positioning component is provided with a second annular protrusion that protrudes axially toward the second component and is coaxial with the first annular protrusion, and a second recess that extends circumferentially is provided on the second annular protrusion. In addition to achieving the advantages described with respect to the first annular protrusion through the second annular protrusion, the second annular protrusion coaxially arranged with the first annular protrusion on the positioning component also ensures that the first and second annular protrusions are axially aligned, thereby providing stable support for the coil spring at both ends. Of course, it is also preferred that the second annular protrusion be designed so that, when the positioning component and the second component are connected, there is only a small gap between the radially adjacent components to provide stable support for the coil spring.
[0018] In one advantageous design, the first and second annular protrusions are configured to support both ends of the spring body. This design allows for stable, centered support of the coil spring body in the axial direction within the smallest possible structural space, facilitating a compact design of the entire torque limiter.
[0019] In one advantageous design, the contact surfaces of the first and second annular protrusions with the spring body are configured as helical surfaces that conform to the helical structure of the spring body. The helical surface design ensures that the support provided to the spring body is more consistent with the helical structure of the spring body, which can more evenly and firmly define the axial position of the coil spring. Furthermore, because the contact surfaces with the spring body conform to the helical spring body, the first and second axially extending ends of the coil spring can better fit the helical spring body.
[0020] In one advantageous design, the first and second ends are respectively accommodated in the first and second recesses. When the positioning member or the second member begins to rotate the coil spring, the first and second ends are respectively able to move circumferentially within the first and second recesses, wherein the first and second ends are respectively stopped by two axially extending sidewalls of the first and second recesses. The first and second ends are respectively accommodated in the first recess of the second member and the second recess of the positioning member, thereby further reducing the axial and radial installation space of the coil spring and further achieving a compact design of the torque limiter. Furthermore, depending on the operating state of the torque limiter, i.e., transmitting torque in a normal state or interrupting torque transmission in an abnormal state, the circumferential movement of the first and second ends in the corresponding recesses can be limited by the corresponding sidewalls, so that the two ends can move only within a predetermined range, thereby achieving more precise control over torque transmission or interruption. Furthermore, the sidewall stops prevent the first and second ends of the coil spring from excessively deforming or slipping out of the recesses when the torque is excessive, thereby protecting the coil spring from damage.
[0021] In a favorable design scheme, the side wall of the first recessed portion with a larger length in the axial direction is configured as a first abutment portion, and the side wall of the second recessed portion with a larger length in the axial direction is configured as a second abutment portion. When the first end portion and the second end portion stop on the first abutment portion and the second abutment portion respectively, the action of the first abutment portion and the second abutment portion on the first end portion and the second end portion causes the coil spring to unwind, wherein the first abutment portion and the second abutment portion are configured as surfaces inclined relative to the radial direction, and gradually move away from the other side wall of the first recessed portion and the second recessed portion respectively from the inside to the outside relative to the radial direction. Because the contact surfaces of the first and second annular protrusions with the spring body are configured as helical surfaces that conform to the helical structure of the spring body, the axially extending sidewalls of the first and second recesses have different lengths. By designing the first and second abutting portions as the longer sidewalls of the first and second recesses, respectively, the first and second abutting portions can achieve a greater axial abutment engagement with the axially extending first or second end of the coil spring, thereby achieving a more reliable abutment engagement. This also minimizes the axially extending end of the coil spring, thereby facilitating the axial miniaturization of the torque limiter. Furthermore, the first and second abutting portions are configured as radially inclined surfaces that gradually move away from the other sidewalls of the first and second recesses, respectively, from the inside to the outside. This allows the first and second ends of the coil spring to be subjected to a radially outward force when they abut against the corresponding abutting portions. This force tends to deform the first and second ends of the coil spring radially outward, facilitating unwinding of the coil spring and improving the reliability of the unwinding operation. Finally, it is also possible to prevent the burrs on the first and second ends of the coil spring from generating unnecessary friction with parts in contact therewith.
[0022] In an advantageous design, the first abutting portion and the second abutting portion are inclined at an angle of 5 to 60 degrees relative to the radial direction.
[0023] In an advantageous design, the first abutting portion and the second abutting portion are inclined at an angle of 30 degrees relative to the radial direction.
[0024] In one advantageous design, the first component comprises a shaft portion and a cylindrical component, with the shaft portion of the first component housed and secured within the cylindrical component, and the outer circumference of the cylindrical component constituting at least a portion of the outer circumference of the first component. Designing the first component to consist of the shaft portion and the cylindrical component reduces maintenance costs, as damaged components can be replaced individually. Furthermore, by selecting shaft portions and cylindrical components of varying sizes and materials, the design can be adapted to various application scenarios, enhancing design flexibility and applicability.
[0025] In one advantageous design, the cylindrical component has a notch formed in its cylindrical wall, and the first component has a first locking projection formed therein. The first locking projection engages in the notch, thereby circumferentially securing the cylindrical component and the first component to each other. This design allows for relatively simple circumferential securing of the cylindrical component and the first component, contributing to a compact design of the entire torque limiter.
[0026] In one advantageous design, the positioning component includes a sixth axial stop, the first component includes a flange that axially abuts the sixth axial stop, the tubular component includes an abutment, and the second component includes a third axial stop that axially abuts the third axial stop. This design allows the first component, or the first component and the coil spring, to be easily and axially fixed within the accommodation space formed by the connection between the positioning component and the second component.
[0027] In one advantageous design, the cylindrical member is constructed of metal. Since coil springs are generally made of metal, designing the cylindrical member as a metal member can reduce wear caused by the coil spring clinging to and sliding relative to the outer circumference of the cylindrical member, thereby increasing the service life of the torque limiter.
[0028] In an advantageous design, the coil spring is formed of a wire with a square cross section. Compared to a wire with a round cross section, a wire with a square cross section can contact the first component or the cylindrical component with a larger contact surface, which is beneficial for stable torque transmission.
[0029] In an advantageous design, the first end and the second end extend from the spring body by the same length. The same extension length of the first and second ends results in consistent deformation when abutted by other mating components, and eliminates the need for installation direction restrictions during assembly.
[0030] In one advantageous design, the first component and / or the second component are designed with a gear portion for transmitting torque to the other component. Of course, it is also conceivable that the first component may not be provided with a gear portion when it serves as an output component or an action-performing component. Of course, the gear portion may be designed to be integral with or separate from the first component and / or the second component.
[0031] In one advantageous design, the first component is provided with a first axial hole coaxial with the axis, and the second component is provided with a second axial hole coaxial with the axis. The torque limiter further comprises a support shaft extending through the first and second axial holes to rotatably support the first and second components. The support shaft coaxially supports the first and second components, thereby supporting the torque limiter. This design ensures precise alignment of the first and second components during rotation, thereby achieving smooth and consistent rotation of both components. Of course, other solutions for supporting the torque limiter are conceivable, such as integrally supporting the torque limiter within a corresponding housing.
[0032] The utility model further relates to a flip cover machine, which comprises a housing, wherein a motor and a transmission mechanism are accommodated in the housing, and the transmission mechanism is provided with a torque limiter according to the utility model or an optional advantageous design thereof.
[0033] The utility model also relates to a toilet, which is provided with a toilet cover and a flapper capable of driving the toilet cover to open and close. The flapper can be designed as the flapper according to the utility model.
[0034] The advantageous designs and advantages of the flap machine and toilet according to the present invention can be referenced to the advantageous designs and advantages described for the torque limiter. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] The preferred embodiments of the present invention are explained in more detail below with reference to the accompanying drawings, wherein:
[0036] Figure 1 Showing a side view and an axial cross-sectional view of a torque limiter according to the present invention,
[0037] Figure 2 Showing an exploded view of the torque limiter according to the present invention,
[0038] Figure 3 A perspective view showing the first component of the torque limiter according to the present invention from both axial sides,
[0039] Figure 4 A perspective view showing a coil spring of a torque limiter according to the present invention,
[0040] Figure 5 A perspective view showing the second component of the torque limiter according to the present invention and two radially partially cutaway perspective views with slightly different viewing directions,
[0041] Figure 6 A perspective view showing another perspective of the second component of the torque limiter according to the present invention and a partially cutaway perspective view along the axial direction,
[0042] Figure 7A perspective view and a partially cutaway perspective view along the axial direction showing a positioning component of a torque limiter according to the present invention are shown.
[0043] Figure 8 An axial front view and a slightly axially inclined perspective view of a positioning component of a torque limiter according to the present invention are shown.
[0044] Figure 9 An axial front view and a slightly axially inclined perspective view of the second component of the torque limiter according to the present invention are shown.
[0045] Figure 10 An axial sectional view and a partially cutaway perspective view of the torque limiter according to the present invention are shown, wherein the second end of the coil spring can be seen in the second recess of the positioning component.
[0046] Figure 11 The following shows a case where the torque limiter according to the present invention is used in a clamshell machine. DETAILED DESCRIPTION
[0047] Figure 1 The figure shows a side view and an axial cross-sectional view of a torque limiter 1 according to the present invention. The torque limiter 1 comprises a first component 2, a second component 3, a coil spring 5 and a positioning component 6, wherein the first component 2, the second component 3, the coil spring 5 and the positioning component 6 are coaxially arranged along the same axis, in particular as shown in FIG. Figure 1 as well as Figure 2 As shown in the exploded view of the torque limiter 1 according to the present invention. Figure 1 as well as Figure 2 In the illustrated embodiment, both the first component 2 and the second component 3 are designed with gear parts for transmitting torque with other components.
[0048] Figure 3 The first component 2 of the torque limiter according to the present invention is shown in a perspective view from both sides of the axial direction. The first component 2 may include a shaft portion 25 and a Figure 2 The cylindrical component 4 shown in FIG, and the shaft portion 25 of the first component 2 is accommodated and fixed in the cylindrical component 4. In the embodiment shown, the cylindrical component 4 is configured with a notch portion 41 (see FIG. Figure 2 ), the first component 2 is constructed with a first locking protrusion 21, which is engaged in the notch portion and thereby fixes the tubular component 4 and the first component 2 to each other in the circumferential direction.
[0049] Combine this first Figure 7The first component 2 is axially fixed between the positioning component 6 and the second component 3. The positioning component 6 has a sixth axial limit portion 66, which is designed as an annular flange in this example. The first component 2 is configured with a flange portion 22, which abuts against the sixth axial limit portion 66 in the axial direction, and the cylindrical component 4 is configured with a abutment portion 42 (see Figure 2 ), the second component 3 is configured with a third axial limiting portion 37 (see Figure 5 ), the abutting portion 42 axially abuts against the third axial limiting portion 37.
[0050] The cylindrical component 4 can be constructed of metal. This reduces the wear caused by the coil spring 5, which is generally made of metal, being tightened on the cylindrical component 4 and sliding relative to it. As shown in the figure, the first component 2 is provided with a first axial hole 23 coaxial with the axis, and the second component 3 is provided with a second axial hole 38 coaxial with the axis (see FIG. Figure 6 ), the torque limiter 1 may further include a support shaft 7, which passes through the first shaft hole 23 and the second shaft hole 38 so as to rotatably support the first component 2 and the second component 3.
[0051] like Figure 4 As shown, the coil spring 5 has a spring body 51 and a first end 52 and a second end 53 extending from the spring body 51 in the axial direction, wherein the spring body 51 is tightly wound on at least a portion of the outer circumference of the first component 2 (see FIG. Figure 1 Of course, when the first component 2 is designed with a cylindrical component 4, the spring body 51 is tightly wound on the cylindrical component 4. Figure 4 The spiral spring 5 shown in the figure is made of the wire with a circular cross section, but advantageously it is made of the wire with a square cross section. In addition, as can be seen from the figure, the first end 52 and the second end 53 stretch out from the spring body 51 with identical size.
[0052] from Figure 1 as well as Figure 2 It can also be seen that the positioning component 6 is connected to the second component 3 and thereby constitutes an accommodating space for accommodating the coil spring 5 and at least a portion of the first component 2. When the first component 2 is designed with a gear portion, the gear portion extends from the hole on the positioning component 6 to be connected to the component driven by it.
[0053] Since the coil spring 5 is wound tightly on at least a portion of the outer circumference of the first component 2, the second component 3 is Figure 2When a tangential force relative to the axis is applied by the second component 3 (the right end of the coil spring 5), the force acts in the direction of winding of the coil spring 5, so that the first component 2 can be rotated in the first direction. If the second component 3 is to transmit torque to the first component 2 in the opposite direction, the second component 3 first drives the positioning component 6 to rotate through the connection with the positioning component 6, and the positioning component 6 rotates at the second end 53 ( Figure 2 When a tangential force relative to the axis (also acting in the winding direction of the coil spring 5) is applied to the left end portion of the coil spring 5), the first component 2 can be rotated in a second direction opposite to the first direction.
[0054] like Figures 5 to 7 As shown, the second component 3 is constructed with a cylindrical portion 31, on which is constructed a first circumferential limiting portion 32 extending along the axis. In this embodiment, the first circumferential limiting portion 32 is configured as a notch in the cylindrical wall of the cylindrical portion 31. The positioning component 6 is constructed with a third circumferential limiting portion 61, which in this embodiment is configured as a protrusion on the positioning component 6. The first circumferential limiting portion 32 and the third circumferential limiting portion 61 are form-fitted and thereby fix the second component 3 and the positioning component 6 to each other in the circumferential direction.
[0055] It can also be seen that the barrel portion 31 is provided with a first axial stopper 33, which in this example is designed as a groove therein. The positioning component 6 is provided with a fourth axial stopper 62, which in this example is designed as a snap-fit portion that snaps into the first axial stopper 33, in this case the groove. The first axial stopper 33 and the fourth axial stopper 62 form a mate, thereby securing the second component 3 and the positioning component 6 to each other in the axial direction.
[0056] Figures 5 and 6 As can be seen in the figure, the barrel 31 is configured with a bottom at one end, on which is configured a first annular protrusion 34 protruding axially into the barrel 31. A first recess 35 extending circumferentially is configured on the first annular protrusion 34. As can be seen in the figure, the first annular protrusion 34 is designed to protrude from the bottom of the barrel into the barrel, conforming to the barrel wall, thereby more stably supporting the coil spring.
[0057] like Figure 7 As shown, the positioning member 6 is formed with a second annular protrusion 63 that protrudes axially toward the second member 3 and is coaxial with the first annular protrusion 34. A second recess 64 extending circumferentially is formed on the second annular protrusion 63. As can be seen in the figure, the second annular protrusion 63 and the outer peripheral wall of the positioning member 6 can be said to form a double-walled positioning member 6.
[0058] The first annular protrusion 34 and the second annular protrusion 63 are configured to support both ends of the spring body 51. In addition, the contact surfaces of the first annular protrusion 34 and the second annular protrusion 63 with the spring body 51 are configured as helical surfaces that are consistent with the helical structure of the spring body 51. Figure 6 The spiral surface of the first annular protrusion 34 can be seen in the right side three-dimensional cross-sectional view.
[0059] The first end 52 and the second end 53 of the coil spring 5 are respectively accommodated in the first recess 35 and the second recess 64. When the positioning component 6 or the second component 3 starts to rotate the coil spring 5, the first end 52 and the second end 53 can respectively move circumferentially in the first recess 35 and the second recess 64, wherein the first end 52 and the second end 53 are respectively stopped on two side walls extending in the axial direction of the first recess 35 and the second recess 64.
[0060] The side wall of the first concave portion 35 with a longer length in the axial direction is configured as the first abutment portion 36, and the side wall of the second concave portion 64 with a longer length in the axial direction is configured as the second abutment portion 65. When the first end portion 52 and the second end portion 53 stop on the first abutment portion 36 and the second abutment portion 65 respectively, the first abutment portion 36 and the second abutment portion 65 act on the first end portion 52 and the second end portion 53 to cause the coil spring 5 to unwind, wherein the first abutment portion 36 and the second abutment portion 65 are configured as surfaces inclined relative to the radial direction, and gradually move away from the other side wall of the first concave portion 35 and the second concave portion 64 from the inside to the outside relative to the radial direction. Figure 8 and Figure 9 , the first abutting portion 36 and the second abutting portion 65 are inclined, wherein the first abutting portion 36 is inclined at an angle B, and the second abutting portion 65 is inclined at an angle A. Angles A and B can be selected to be approximately between 5 degrees and 60 degrees, preferably 30 degrees.
[0061] Figure 11 The figure shows a torque limiter 1 according to the present invention applied to a flip phone. The left side of the figure shows the housing, which houses the motor and transmission mechanism. Components extending from the housing connect to the flip cover (not shown) to open and close it. The right side view shows the case without the housing, revealing that the second component 3 of the torque limiter 1 is connected to the output shaft of the motor, while the first component 2 is connected to other components and ultimately outputs torque to the flip cover (not shown).
[0062] Although the present invention has been described in detail through preferred embodiments, the present invention is not limited to the disclosed embodiments, and technicians can derive other variant design solutions by combining the technical features mentioned in this specification without departing from the scope of protection of the present invention.
Claims
1. A torque limiter (1), comprising a first component (2), a second component (3), a coil spring (5) and a positioning component (6), wherein: The first component (2), the second component (3), the coil spring (5) and the positioning component (6) are coaxially arranged along the same axis, characterized in that the coil spring (5) has a spring body (51) and a first end (52) and a second end (53) extending from the spring body (51) in the direction of the axis, wherein the spring body (51) is tightly wound on at least a portion of the outer circumference of the first component (2), and the positioning component (6) is connected to the second component (3) and thereby forms an accommodating space for accommodating the coil spring (5) and at least a portion of the first component (2), so that the second component (3) can rotate the first component (2) in a first direction when the first end (52) applies a tangential force relative to the axis, and the positioning component (6) can rotate the first component (2) in an opposite second direction when a tangential force relative to the axis is applied to the second end (53), wherein when the torque transmitted through the torque limiter (1) is greater than a threshold value, the spring body (51) slides on at least a portion of the outer circumference of the first component (2) and thereby interrupts the transmission of the torque.
2. The torque limiter (1) according to claim 1, characterized in that The second component (3) is constructed with a cylindrical portion (31), and a first circumferential limiting portion (32) extending along the axis is constructed on the cylindrical portion (31). The positioning component (6) is constructed with a third circumferential limiting portion (61). The first circumferential limiting portion (32) and the third circumferential limiting portion (61) are matched in shape to thereby fix the second component (3) and the positioning component (6) to each other in the circumferential direction.
3. The torque limiter (1) according to claim 2, characterized in that A first axial limiting portion (33) is constructed on the cylindrical portion (31), and a fourth axial limiting portion (62) is constructed on the positioning component (6). The first axial limiting portion (33) and the fourth axial limiting portion (62) are matched in shape to thereby fix the second component (3) and the positioning component (6) to each other in the axial direction.
4. The torque limiter (1) according to claim 3, characterized in that The cylindrical portion (31) is provided with a bottom at one end, a first annular protrusion (34) protruding into the cylindrical portion (31) along the axial direction is provided on the bottom, and a first concave portion (35) extending along the circumferential direction is provided on the first annular protrusion (34).
5. The torque limiter (1) according to claim 4, characterized in that A second annular protrusion (63) is constructed on the positioning component (6) and protrudes toward the second component (3) along the axial direction and is coaxial with the first annular protrusion (34). A second recess (64) extending along the circumferential direction is constructed on the second annular protrusion (63).
6. The torque limiter (1) according to claim 5, characterized in that The first annular protrusion (34) and the second annular protrusion (63) are configured to support both ends of the spring body (51).
7. The torque limiter (1) according to claim 6, characterized in that The contact surfaces between the first annular protrusion (34) and the second annular protrusion (63) and the spring body (51) are constructed as helical surfaces that are consistent with the helical structure of the spring body (51).
8. The torque limiter (1) according to claim 7, characterized in that The first end portion (52) and the second end portion (53) are respectively accommodated in the first recessed portion (35) and the second recessed portion (64). When the positioning component (6) or the second component (3) starts to rotate the coil spring (5), the first end portion (52) and the second end portion (53) can respectively move circumferentially in the first recessed portion (35) and the second recessed portion (64), wherein the first end portion (52) and the second end portion (53) are respectively stopped on two side walls of the first recessed portion (35) and the second recessed portion (64) extending along the axial direction.
9. The torque limiter (1) according to claim 8, characterized in that The side wall of the first concave portion (35) having a larger length in the axial direction is configured as a first abutting portion (36), and the side wall of the second concave portion (64) having a larger length in the axial direction is configured as a second abutting portion (65). When the first end portion (52) and the second end portion (53) are stopped on the first abutting portion (36) and the second abutting portion (65) respectively, the first abutting portion (36) and the second abutting portion (65) act on the first end portion (52) and the second end portion (53) to cause the coil spring (5) to unwind, wherein the first abutting portion (36) and the second abutting portion (65) are configured as surfaces inclined relative to the radial direction, and gradually move away from the other side wall of the first concave portion (35) and the second concave portion (64) from the inside to the outside relative to the radial direction.
10. The torque limiter (1) according to claim 9, characterized in that The first abutting portion (36) and the second abutting portion (65) are inclined at an angle of 5 to 60 degrees relative to the radial direction.
11. The torque limiter (1) according to claim 10, characterized in that The first abutting portion (36) and the second abutting portion (65) are inclined at an angle of 30 degrees relative to the radial direction.
12. The torque limiter (1) according to claim 1, characterized in that The first component (2) includes a shaft portion and a cylindrical component (4), and the shaft portion of the first component (2) is accommodated and fixed in the cylindrical component (4), and the outer peripheral surface of the cylindrical component (4) constitutes at least a part of the outer peripheral surface of the first component (2).
13. The torque limiter (1) according to claim 12, characterized in that The cylindrical component (4) is provided with a notch (41) on its cylindrical wall, and the first component (2) is provided with a first locking protrusion (21). The first locking protrusion (21) is engaged in the notch and thereby fixes the cylindrical component (4) and the first component (2) to each other in the circumferential direction.
14. The torque limiter (1) according to claim 12, characterized in that The positioning component (6) has a sixth axial limiting portion (66), the first component (2) is constructed with a flange portion (22), and the flange portion (22) axially abuts against the sixth axial limiting portion (66), the tubular component (4) is constructed with an abutting portion (42), and the second component (3) is constructed with a third axial limiting portion (37), and the abutting portion axially abuts against the third axial limiting portion (37), thereby axially fixing the first component (2) between the positioning component (6) and the second component (3).
15. The torque limiter (1) according to claim 12, characterized in that The cylindrical component (4) is constructed of metal.
16. The torque limiter (1) according to claim 1, characterized in that The coil spring (5) is made of a wire with a square cross section.
17. The torque limiter (1) according to claim 1, characterized in that The first end portion (52) and the second end portion (53) extend from the spring body (51) with the same size.
18. The torque limiter (1) according to claim 1, characterized in that The first component (2) and / or the second component (3) is designed with a gear portion for transmitting torque to other components.
19. The torque limiter (1) according to claim 1, characterized in that The first component (2) is provided with a first axial hole (23) coaxial with the axis, the second component (3) is provided with a second axial hole (38) coaxial with the axis, and the torque limiter (1) further comprises a support shaft (7) passing through the first axial hole (23) and the second axial hole (38) so as to rotatably support the first component (2) and the second component (3).
20. A flip phone having a housing, wherein a motor and a transmission mechanism are housed in the housing, wherein: The transmission comprises a torque limiter (1) according to one of the preceding claims 1 to 19.
21. A toilet with a toilet lid and a lid-opening mechanism capable of driving the toilet lid to open and close, characterized in that: The flip phone is the flip phone according to claim 20.