Adjusting device and thermal overload relay
By designing an adjustment device including an adjustment knob, an inner curve cam and a linkage rod, the problem of errors in the control trip stroke of the adjustment device in the thermal overload relay is solved, the overload protection effect is improved, and external lines with different overload currents are adapted.
Patent Information
- Application Number
- CN202421980861.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The adjustment device in the thermal overload relay has errors when controlling the trip stroke, which reduces the accuracy of the trip stroke and the overload current and affects the overload protection effect.
An adjustment device including an adjustment knob, an inner curve cam and a linkage lever is designed. The adjustment knob is installed on the base of the thermal overload relay, and the inner curved cam is connected to the adjustment knob. One end of the linkage lever is set on the compensation bimetallic sheet, and the other end is connected to the inner contour line of the inner curved cam, driving the compensation bimetallic sheet to rotate and control the trip stroke.
By improving the accuracy of the adjustment device, it is ensured that the thermal overload relay can effectively protect the external lines from overload damage and adapt to external lines with different overload currents.
Smart Images
Figure CN222966021U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of electronic devices, and particularly to an adjusting device and a thermal overload relay. Background Art
[0002] A thermal overload relay is a commonly used protective electrical appliance. The thermal overload relay is connected to an external circuit for overload protection of the external circuit. The thermal overload relay monitors the current passing through the external circuit. When the current exceeds a preset rated value, the thermal overload relay will trip due to heat generation, cutting off the external circuit to prevent the electronic devices on the external circuit from being burned out due to overload.
[0003] In the related art, the thermal overload relay includes an adjusting device for adjusting the tripping stroke. There are errors when the adjusting device controls the tripping stroke, which reduces the accuracy of the correspondence between the tripping stroke and the overload current, thereby affecting the overload protection effect of the thermal overload relay. Summary of the Utility Model
[0004] This application provides an adjusting device and a thermal overload relay to solve the problem of errors when the adjusting device controls the tripping stroke, improve the accuracy of the adjusting device, and thus ensure the overload protection effect of the thermal overload relay.
[0005] In a first aspect, this application provides an adjusting device applied to a thermal overload relay. The adjusting device includes: an adjusting knob, an inner curve cam, and a linkage rod. The adjusting knob is installed on the base of the thermal overload relay so that the adjusting knob can rotate on the base. The inner curve cam is connected to the adjusting knob so that the inner curve cam can rotate together with the adjusting knob. The inner curve cam includes an inner contour line and an outer contour line. One end of the linkage rod is disposed on the compensating bimetal of the thermal overload relay, and the compensating bimetal is rotatably connected to the base. The other end of the linkage rod abuts against the inner contour line. When the adjusting knob and the inner curve cam rotate, the linkage rod drives the compensating bimetal to rotate.
[0006] Provided by the first aspect, the adjustment device provided in this application includes: an adjustment knob, an inner curve cam, and a linkage rod. An operator rotates the adjustment knob, causing the inner curve cam connected to the adjustment knob to rotate together. One end of the linkage rod is disposed on the compensating bimetal of the thermal overload relay, and the compensating bimetal is rotatably connected to the base. When the other end of the linkage rod abuts against the inner contour line of the inner curve cam, the linkage rod drives the compensating bimetal to rotate, enabling the compensating bimetal to control the tripping stroke of the thermal overload relay. The inner contour line of the inner curve cam is located on the concave surface of the arc surface, and there is only one lowest point between one end of the linkage rod and the concave surface of the arc surface. It is not easy for the linkage rod to slip, enabling the adjustment knob to be accurately positioned, thereby improving the accuracy of the adjustment device to ensure that the thermal overload relay can have a good overload protection effect for external circuits with different overload currents.
[0007] In a possible design, a spherical convex structure is provided at one end of the linkage rod.
[0008] Based on the description of the above embodiment, a spherical convex structure is provided at one end of the linkage rod, such that any point on one end of the linkage rod coming into contact with the inner contour line does not affect the moving distance of the linkage rod, improving the stability of the adjustment device for adjusting the tripping stroke, thereby improving the accuracy of the adjustment device.
[0009] In a possible design, a limiting structure is provided on the adjustment knob. The limiting structure is used to limit the rotation angle of the adjustment knob.
[0010] Based on the description of the above embodiment, by limiting the rotation angle of the adjustment knob through the limiting structure, the rotation angle of the inner curve cam is thus limited, and further the moving stroke of the linkage rod is limited, ultimately achieving the purpose of limiting the tripping stroke of the thermal overload relay.
[0011] In a possible design, the limiting structure includes a limiting block, a first limiting surface, and a second limiting surface. The limiting block is provided on the adjustment knob. Both the first limiting surface and the second limiting surface are provided on the base. The limiting block is located between the first limiting surface and the second limiting surface.
[0012] Based on the description of the above embodiment, by disposing the limiting block between the first limiting surface and the second limiting surface, the degree of clockwise rotation and the degree of counterclockwise rotation of the adjustment knob can be limited, thereby limiting the rotation angle of the adjustment knob.
[0013] In a possible design, the spherical convex structure is fixedly connected to one end of the linkage rod. Or, the spherical convex structure is detachably connected to one end of the linkage rod.
[0014] Based on the description of the above embodiments, the advantages of fixed connection may include: high stability, space saving, prevention of accidental separation, and reduction of production costs, etc. The advantages of detachable connection may include: easy maintenance and upgrade, high flexibility, and high scalability, etc. The operator can select and match according to the specific situation.
[0015] In a possible design, the other end of the linkage rod is fixedly connected to the compensating bimetallic strip.
[0016] Based on the description of the above embodiments, the advantages of fixed connection may include: high stability, space saving, prevention of accidental separation, and reduction of production costs, etc.
[0017] In a possible design, the other end of the linkage rod is detachably connected to the compensating bimetallic strip.
[0018] Based on the description of the above embodiments, the advantages of detachable connection may include: easy maintenance and upgrade, high flexibility, and high scalability, etc.
[0019] In a possible design, the linkage rod and the compensating bimetallic strip are made of different materials.
[0020] Based on the description of the above embodiments, when the other end of the linkage rod is detachably connected to the compensating bimetallic strip, the linkage rod and the compensating bimetallic strip can be made of different materials so that the linkage rod and the compensating bimetallic strip can each play the best use effect.
[0021] In a possible design, the inner curve cam includes a boss structure. The outer surface of the boss structure is a cylinder.
[0022] According to the description of the above embodiments, in the present application, the boss structure is set as a cylinder, which makes the installation of the inner curve cam more convenient. And when the boss structure is set as a cylinder, the interference between the boss structure and other components around it during the use of the adjusting device can be reduced, thereby improving the use reliability of the adjusting device.
[0023] Second aspect, the present application provides a thermal overload relay, including: a main control system, an operating system, a line switch, a housing, and the adjusting device described in any one of the above embodiments. The main control system includes a main bimetal, and the main bimetal is used to control the operation of the operating system. The operating system includes a transmission mechanism and a compensating bimetal. The transmission mechanism is used to perform a tripping stroke and control the opening and closing of the line switch. The compensating bimetal is connected to the transmission mechanism and is used to compensate the tripping stroke according to the ambient temperature. The line switch is used to control the on-off of the current in the external line. The adjusting device is connected to the compensating bimetal and is used to control the tripping stroke. The housing includes a base and a protective shell, and the base is used to mount the main control system, the operating system, the line switch, and the adjusting device.
[0024] For the thermal overload relay provided in the above second aspect, the beneficial effects can refer to the beneficial effects brought by the above first aspect and each possible implementation manner of the first aspect, which will not be elaborated here. Description of the Drawings
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0026] Figure 1 It is an assembly diagram of the adjusting device, compensating bimetal, transmission mechanism and base in the embodiment of the present application.
[0027] Figure 2 It is Figure 1 A view in another direction.
[0028] Figure 3 It is a structural schematic diagram of the adjusting device and compensating bimetal in the embodiment of the present application.
[0029] Figure 4 It is a structural schematic diagram of the adjusting knob and internal curve cam in the embodiment of the present application.
[0030] Figure 5 It is Figure 4 A view in another direction.
[0031] Figure 6 It is Figure 3 A view in another direction.
[0032] Figure 7 It is Figure 6 An enlarged view of part A in
[0033] Figure 8 This is a schematic structural view of the compensation bimetal sheet and the linkage rod in the embodiment of the present application.
[0034] Figure 9 This is a schematic structural view of the base in the embodiment of the present application.
[0035] Figure 10 It is Figure 9 an enlarged view of part B in
[0036] Explanation of the reference numerals in the drawings:
[0037] 1 - Adjusting device; 11 - Adjusting knob; 111 - Operating end; 112 - Link rod; 12 - Inner curve cam; 121 - Boss structure; 122 - Counterbore; 13 - Linkage rod; 131 - Spherical convex structure;
[0038] 14 - Limit block; 15 - First limit surface; 16 - Second limit surface;
[0039] 2 - Base;
[0040] 3 - Compensation bimetal sheet;
[0041] 4 - Transmission mechanism. Detailed implementation manners
[0042] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.
[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0044] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the accompanying drawings are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.
[0045] References to "embodiments" in this specification mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase "embodiments" appearing in various places in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0046] As used herein, the term "and / or" is merely a description of the associated relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " herein generally represents an "or" relationship between the associated objects before and after.
[0047] The directional terms appearing in the following description are all the directions shown in the figures and do not limit the specific structure of the present application. For example, in the description of the present application, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.
[0048] In addition, expressions indicating directions such as the X direction, Y direction, and Z direction used to explain the operations and structures of the components in this embodiment are not absolute but relative. Although these indications are appropriate when the components are in the positions shown in the figures, when these positions change, these directions should have different interpretations to correspond to the changes.
[0049] Furthermore, terms such as "first", "second", etc. in the specification and claims of the present application or in the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.
[0050] In the description of the present application, unless otherwise specified, "a plurality of" means two or more (including two). Similarly, "a plurality of groups" means two or more groups (including two groups).
[0051] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, the "connection" or "linkage" of mechanical structures can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through screws, bolts, or other fixing members; a physical connection can also be a detachable connection, such as a snap connection or a clamping connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. The "connection" or "linkage" of circuit structures can refer to not only a physical connection but also an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate component, as long as the circuit is connected; it can also be the communication inside two components; in addition to the signal connection through a circuit, the signal connection can also refer to a signal connection through a media medium, such as radio waves. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0052] The thermal overload relay provided by the present application is connected to an external circuit. The above thermal overload relay may include: a main control system, an operating system, a line switch, and a housing.
[0053] Among them, the main control system may include a main bimetal, and the main bimetal is used to control the above operating system to act.
[0054] Among them, the operating system may include a transmission mechanism and a compensating bimetal. The action controlled by the main control system on the transmission mechanism can be called a tripping action, and the tripping action can control the opening and closing of the line switch. Specifically, when the transmission mechanism moves to different positions, the stroke of the tripping action is different. The compensating bimetal is connected to the transmission mechanism and is used to compensate the stroke of the above tripping action according to the ambient temperature.
[0055] Among them, the line switch is used to control the on-off of the current in the external circuit. Specifically, the above thermal overload relay may include a plurality of line switches, and the plurality of line switches can be respectively connected to a plurality of external circuits to control the on-off of the current in the plurality of external circuits.
[0056] Among them, the housing may include a base and a protective shell. The base can be used to install the above main control system, operating system, and line switch. The protective shell has a receiving cavity and is used to cover the above control system, operating system, and line switch to play a protective role. Specifically, as Figure 1 and Figure 2 shown, the adjusting device 1, the transmission mechanism 4, and the compensating bimetal 3 are all arranged on the base 2.
[0057] Further, the thermal overload relay can be adapted to external circuits with different overload currents. Specifically, the thermal overload relay further includes an adjusting device 1. The adjusting device 1 can be connected to the above-mentioned compensation bimetal 3 and is used to control the stroke of the above-mentioned tripping action to adapt to external circuits with different overload currents.
[0058] In the related art, there are errors when the adjusting device 1 controls the tripping stroke, which reduces the accuracy of the correspondence between the tripping stroke and the overload current, thereby affecting the overload protection effect of the thermal overload relay.
[0059] Based on this, the present application proposes an adjusting device 1 and a thermal overload relay. By setting an inner curve cam 12 in the adjusting device 1, the control error of the adjusting device 1 is reduced, and the accuracy of the adjusting device 1 is improved, thereby ensuring the overload protection effect of the thermal overload relay. The following will be combined with Figures 1 - 10 for detailed description.
[0060] As Figures 1 - 7 shown, the present application provides an adjusting device 1 applied to a thermal overload relay. The adjusting device 1 includes: an adjusting knob 11, an inner curve cam 12, and a linkage rod 13. The adjusting knob 11 is installed on the base 2 of the thermal overload relay, so that the adjusting knob 11 can rotate on the base 2. The inner curve cam 12 is connected to the adjusting knob 11, so that the inner curve cam 12 can rotate together with the adjusting knob 11. The inner curve cam 12 includes an inner contour line and an outer contour line. One end of the linkage rod 13 is arranged on the compensation bimetal 3 of the thermal overload relay, and the compensation bimetal 3 is rotatably connected to the base 2. The other end of the linkage rod 13 abuts against the inner contour line. When the adjusting knob 11 and the inner curve cam rotate, the linkage rod 13 drives the compensation bimetal 3 to rotate.
[0061] Among them, as Figure 3 shown, the adjusting knob 11 can include an operating end 111 and a connecting rod 112. A handle or a cross slot can be arranged on the operating end 111 to facilitate the operator to rotate the adjusting knob 11. The connecting rod 112 is connected to the operating end 111 and is located on the side away from the handle or the cross slot. Exemplarily, as Figure 1 and 4 shown, a cross slot is arranged on the operating end 111. The cross slot is located on one side of the base 2 of the thermal overload relay, and the connecting rod is located on the other side of the base 2. Among them, one side of the base 2 is the outside of the thermal overload relay, and the other side of the base 2 is the inside of the thermal overload relay.
[0062] Among them, as Figure 3 shown, the inner curve cam 12 is connected to the above-mentioned connecting rod 112. As Figure 5As shown, the inner curve cam 12 may include a boss structure 121 and a counterbore 122 formed in the boss. Among them, the shape of the counterbore 122 can be designed as the shape of the cam. Specifically, the outer contour line of the inner curve cam 12 is the contour of the outer wall of the boss structure 121, and the inner contour line of the inner curve cam 12 is the contour of the inner wall of the counterbore 122.
[0063] Among them, as Figure 6 and Figure 7 shown, the linkage rod 13 can be a rod-shaped structure, and the rod-shaped structure includes a first end and a second end arranged oppositely. The first end extends into the above-mentioned counterbore 122 and abuts against the inner wall of the counterbore 122, so that one end of the linkage rod 13 abuts against the inner contour line.
[0064] Based on the above content, it can be known that the linkage rod 13 can be used as a follower of the inner curve cam 12. When the inner curve cam 12 rotates, the linkage rod 13 can be reciprocated.
[0065] One end of the linkage rod 13 is connected to the compensating bimetal 3 provided on the thermal overload relay, and the compensating bimetal 3 is rotatably connected to the base 2, so that the compensating bimetal 3 can rotate with the reciprocating motion of the linkage rod. Since the compensating bimetal 3 is connected to the transmission mechanism 4 of the thermal overload relay, the rotation of the compensating bimetal 3 will cause the movement of the transmission mechanism 4, thereby changing the tripping stroke of the thermal overload relay. When the rotation angle of the adjusting knob 11 is different, the linkage rod 13 moves to different positions, the rotation angle of the compensating bimetal 3 is different, the moving distance of the transmission mechanism 4 is different, and the tripping stroke of the thermal overload relay is also different. Therefore, the tripping stroke of the thermal overload relay can be made different by adjusting the rotation angle of the adjusting knob 11 to adapt to external circuits with different overload currents.
[0066] Furthermore, when the rod-shaped structure abuts against the convex surface of the arc surface, there may be multiple lowest points between the rod-shaped structure and the convex surface, making it easy for the rod-shaped structure to slide, so that accurate positioning cannot be performed. Based on this, the inner contour line of the inner curve cam 12 is located on the concave surface of the arc surface, one end of the linkage rod 13 abuts against the inner contour line, and there is only one lowest point between the linkage rod 13 and the inner curve cam 12, making it not easy for the linkage rod 13 to slide, so that the adjusting knob 11 can be accurately positioned, and thus the tripping stroke of the thermal overload relay can be set more precisely to ensure that the thermal overload relay can have a good overload protection effect for external circuits with different overload currents.
[0067] In summary, the adjusting device 1 provided by the present application includes: an adjusting knob 11, an inner curve cam 12, and a linkage rod 13. An operator rotates the adjusting knob 11, causing the inner curve cam 12 connected to the adjusting knob 11 to rotate together. One end of the linkage rod 13 is disposed on the compensating bimetallic strip 3 of the thermal overload relay, and the compensating bimetallic strip 3 is rotatably connected to the base 2. When the other end of the linkage rod 13 abuts against the inner contour line of the inner curve cam 12, the linkage rod 13 drives the compensating bimetallic strip 3 to rotate, enabling the compensating bimetallic strip 3 to control the tripping stroke of the thermal overload relay. The inner contour line of the inner curve cam 12 is located on the concave surface of the arc surface, and there is only one lowest point between one end of the linkage rod 13 and the concave surface of the arc surface. It is not easy for the linkage rod 13 to slip, enabling the adjusting knob 11 to be accurately positioned, thereby improving the accuracy of the adjusting device 1 to ensure that the thermal overload relay can have a good overload protection effect for external circuits with different overload currents.
[0068] Further, the following two connection methods may be included between the linkage rod 13 and the compensating bimetallic strip 3:
[0069] Method 1: The other end of the linkage rod 13 is fixedly connected to the compensating bimetallic strip 3. The advantages of fixed connection may include: high stability, space saving, prevention of accidental separation, and reduction of production costs, etc.
[0070] Among them, the fixed connection method may be various connection methods such as integral casting and welding, and the present application does not make specific limitations thereon.
[0071] Method 2: The other end of the linkage rod 13 is detachably connected to the compensating bimetallic strip 3. The advantages of detachable connection may include: easy maintenance and upgrade, high flexibility, and high scalability, etc.
[0072] Among them, the detachable connection may include various connection methods such as screwing, riveting, and clamping, and the present application does not make specific limitations thereon.
[0073] Further, when the other end of the linkage rod 13 is detachably connected to the compensating bimetallic strip 3, the linkage rod 13 and the compensating bimetallic strip 3 may be made of materials with different properties.
[0074] Among them, there is friction between the linkage rod 13 and the inner curve cam 12, so the linkage rod 13 needs to use a material with relatively high structural strength.
[0075] Among them, the compensating bimetallic strip 3 controls the tripping stroke by generating deformation, so the compensating bimetallic strip 3 needs to use a material with relatively good elasticity.
[0076] According to the description of the above embodiments, when the other end of the linkage rod 13 is detachably connected to the compensating bimetal 3, the linkage rod 13 and the compensating bimetal 3 can be made of different materials so that the linkage rod 13 and the compensating bimetal 3 can each achieve the best use effect.
[0077] In some embodiments, as Figure 8 shown, one end of the linkage rod 13 is provided with a spherical convex structure 131.
[0078] Among them, the linkage rod 13 can be used as a follower of the inner curve cam 12. One end of the linkage rod 13 abuts against the inner contour line of the inner curve cam 12, converting the rotational motion of the inner curve cam 12 into a linear motion of the linkage rod 13.
[0079] One end of the linkage rod 13 can be provided with a spherical convex structure 131 when any position on the spherical convex structure 131 can contact the above inner contour line. Among them, the position where the spherical convex structure 131 contacts the above inner contour line is the contact point. From the above content, it can be seen that the spherical convex structure 131 can include multiple contact points. Due to the characteristics of the sphere itself, the distance between any contact point and the center of the sphere of the spherical convex structure 131 is the same. Based on this, when the rotation of the inner curve cam 12 is converted into the linear motion of the linkage rod 13, the contact of any point on one end of the linkage rod 13 with the inner contour line does not affect the moving distance of the linkage rod 13, thereby improving the stability of the adjusting device 1 for adjusting the tripping stroke.
[0080] According to the description of the above embodiments, one end of the linkage rod 13 is provided with a spherical convex structure 131, so that the contact of any point on one end of the linkage rod 13 with the inner contour line does not affect the moving distance of the linkage rod 13, improving the stability of the adjusting device 1 for adjusting the tripping stroke, thereby improving the accuracy of the adjusting device 1.
[0081] Furthermore, there can be the following two connection methods between the linkage rod 13 and the spherical convex structure 131:
[0082] Method 1: The spherical convex structure 131 is fixedly connected to one end of the linkage rod 13.
[0083] Among them, the fixed connection method can be various connection methods such as integral casting and welding, and the present application does not make specific limitations on this.
[0084] Method 2: The spherical convex structure 131 is detachably connected to one end of the linkage rod 13.
[0085] Among them, the detachable connection can include various connection methods such as screwing, riveting, and clamping, and the present application does not make specific limitations on this.
[0086] In some embodiments, a limiting structure is provided on the adjusting knob 11. The limiting structure is used to limit the rotation angle of the adjusting knob 11.
[0087] According to the description of the above embodiments, by limiting the rotation angle of the adjusting knob 11 through the limiting structure, the rotation angle of the inner curve cam 12 is restricted, and further the moving stroke of the linkage rod 13 is restricted, ultimately achieving the purpose of limiting the tripping stroke of the thermal overload relay.
[0088] In some embodiments, such as Figure 5 , Figure 9 and Figure 10 shown, the limiting structure includes a limiting block 14, a first limiting surface 15, and a second limiting surface 16. The limiting block 14 is provided on the adjusting knob 11. The first limiting surface 15 and the second limiting surface 16 are provided on the base 2, and the limiting block 14 is located between the first limiting surface 15 and the second limiting surface 16.
[0089] Specifically, the base 2 is provided with a mounting hole for mounting the adjusting knob 11. Among them, the connecting rod 112 in the adjusting knob 11 is sleeved in the above mounting hole.
[0090] Among them, the first limiting surface 15 can be a side surface of the above mounting hole, and the second limiting surface 16 can be another side surface of the above mounting hole. There is a gap between the above two side surfaces.
[0091] Among them, the limiting block 14 is provided on the above connecting rod 112 and is located in the gap between the above two side surfaces. When the adjusting knob 11 rotates, the limiting block 14 can abut against the first limiting surface 15, and the limiting block 14 can also abut against the second limiting surface 16. Specifically, when the adjusting knob 11 rotates clockwise, the limiting block 14 can abut against the first limiting surface 15. Thus, according to the description of the above embodiments, when the adjusting knob 11 rotates counterclockwise, the limiting block 14 can abut against the second limiting surface 16, thereby restricting the adjusting knob 11 from continuing to rotate counterclockwise.
[0092] According to the description of the above embodiments, by setting the limiting block 14 between the first limiting surface 15 and the second limiting surface 16, the degree of clockwise rotation of the adjusting knob 11 and the degree of counterclockwise rotation of the adjusting knob 11 can be restricted, thereby restricting the rotation angle of the adjusting knob 11.
[0093] In some embodiments, such as Figure 5 shown, the inner curve cam 12 may include a boss structure 121. The boss structure 121 may be a cylinder.
[0094] According to the description of the above embodiments, the present application sets the boss structure 121 as a cylinder, making the inner curve cam 12 more convenient to install. And when the boss structure 121 is set as a cylinder, the interference between the boss structure 121 and other components around it can be reduced during the use of the adjusting device 1, thereby improving the reliability of the use of the adjusting device 1.
[0095] Those skilled in the art can understand that although some of the embodiments herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.
[0096] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.
Claims
1. A regulating device, applied to a thermal overload relay, characterized in that: include: Adjustment knob, inner curve cam and linkage lever; The adjusting knob is mounted on the base of the thermal overload relay so that the adjusting knob can be rotated on the base; The inner curve cam is connected to the adjusting knob so that the inner curve cam can rotate together with the adjusting knob; The inner curve cam includes an inner contour line and an outer contour line; One end of the linkage rod is arranged on the compensating bimetallic strip of the thermal overload relay, and the compensating bimetallic strip is rotatably connected to the base; The other end of the linkage rod abuts against the inner contour line, and when the adjusting knob and the inner curve cam rotate, the linkage rod drives the compensating bimetallic strip to rotate.
2. The adjusting device according to claim 1, characterized in that: One end of the linkage rod is provided with a spherical protrusion structure.
3. The adjusting device according to claim 1, characterized in that: The adjusting knob is provided with a limiting structure; The limiting structure is used to limit the rotation angle of the adjusting knob.
4. The adjusting device according to claim 3, characterized in that: The limiting structure includes a limiting block, a first limiting surface and a second limiting surface; The limit block is arranged on the adjusting knob; The first limiting surface and the second limiting surface are both arranged on the base; The limiting block is located between the first limiting surface and the second limiting surface.
5. The adjusting device according to claim 2, characterized in that: The spherical protrusion structure is fixedly connected to one end of the linkage rod; or, The spherical protrusion structure is detachably connected to one end of the linkage rod.
6. The adjusting device according to claim 1, characterized in that: The other end of the linkage rod is fixedly connected to the compensation bimetallic strip.
7. The adjusting device according to claim 1, characterized in that: The other end of the linkage rod is detachably connected to the compensation bimetallic strip.
8. The adjusting device according to claim 7, characterized in that: The linkage rod and the compensating bimetallic strip are made of different materials.
9. The adjusting device according to claim 1, characterized in that: The inner curve cam includes a boss structure; The outer surface of the boss structure is a cylinder.
10. A thermal overload relay, characterized in that: include: A main control system, an action system, a circuit switch, a housing, and a regulating device as described in any one of claims 1 to 9; The main control system includes a main bimetallic strip, and the main bimetallic strip is used to control the action system to act; The action system includes a transmission mechanism and a compensating bimetallic strip, wherein the transmission mechanism is used to perform a tripping stroke and control the disconnection of the circuit breaker, and the compensating bimetallic strip is connected to the transmission mechanism and is used to compensate the tripping stroke according to the ambient temperature; The circuit switch is used to control the on and off of the current in the external circuit; The regulating device is connected to the compensating bimetallic strip and is used to control the tripping stroke; The housing comprises a base and a protective shell, and the base is used for installing the main control system, the action system, the circuit switch and the regulating device.