Thermal relay operating mechanism and thermal relay

Abstract

The utility model belongs to the technical field of relays, and discloses a thermal relay operating mechanism and a thermal relay. According to the thermal relay operating mechanism, the first lever is rotationally connected to the base, the stop end of the lock catch assembly is arranged at the first end of the first lever, and the stop end of the lock catch assembly can be clamped with the push rod assembly so as to prevent the push rod assembly from driving the contact assembly to move in the first direction, and lock catch is achieved; the driving end of the tripping assembly abuts against the second end of the first lever, and the tripping assembly is used for driving the first lever to rotate, so that the stop end is separated from the push rod assembly, and tripping is achieved; according to the thermal relay operating mechanism, the two ends of the first lever are provided with the locking assembly and the tripping assembly respectively, locking and tripping are ingeniously achieved through rotation of the first lever, the structure of the thermal relay operating mechanism is simplified, the internal structure of a thermal relay is more compact, the size of the thermal relay is reduced, modular assemblies are adopted for assembling, and the assembling efficiency is improved. And the assembling efficiency of the thermal relay operating mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a thermal relay operating mechanism and a thermal relay. Background Art

[0002] Thermal overload relays are widely used in industrial and commercial fields to protect motors. Their function is to monitor the motor's operating current and take protective measures when an overload occurs to prevent the motor from being damaged due to long-term high-load operation. Traditional thermal overload relays usually consist of a heating component, a main bimetal bending mechanism, a displacement transmission device, a tripping mechanism, and a housing.

[0003] In traditional designs, when the operating current of the motor exceeds the rated value, the main bimetal bending mechanism will deform, and the deformation will be transmitted to the tripping mechanism through the displacement transmission device, thereby causing the thermal overload relay to operate and cut off the circuit to protect the motor.

[0004] However, the thermal overload relay in the prior art has many parts in its actuating mechanism, which not only increases the manufacturing cost but also results in a larger external size of the thermal overload relay. Secondly, due to the large number of parts, the assembly and debugging process is complicated, which increases the production cost and the workload of the staff.

[0005] Therefore, there is an urgent need for a thermal relay operating mechanism and a thermal relay to solve the problems in the prior art. Utility Model Content

[0006] The purpose of the utility model is to provide a thermal relay operating mechanism, which simplifies the structure of the thermal relay operating mechanism, makes the internal structure of the thermal relay more compact, reduces the size of the thermal relay, and the thermal relay operating mechanism is assembled using modular components, which is easy to operate and the assembly process is faster, reducing labor costs and assembly time, and improving the assembly efficiency of the thermal relay operating mechanism.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] Thermal relay operating mechanism, including:

[0009] A contact assembly is slidably connected to the base;

[0010] A push rod assembly, the push rod assembly is used to push the contact assembly to move along a first direction;

[0011] a first lever, the first lever being rotatably connected to the base;

[0012] A lock assembly, wherein a stop end of the lock assembly is disposed at the first end of the first lever, and the stop end of the lock assembly can be engaged with the push rod assembly to prevent the push rod assembly from driving the contact assembly to move along the first direction;

[0013] A release assembly, wherein the driving end of the release assembly abuts against the second end of the first lever, and the release assembly is used to drive the first lever to rotate so that the stop end is disengaged from the push rod assembly.

[0014] Optionally, the locking assembly comprises:

[0015] A stop pin, disposed at the first end of the first lever;

[0016] The first elastic member and the stop pin are respectively located on both sides of the first end of the first lever, one end of the first elastic member abuts against the base, and the other end abuts against the first lever.

[0017] Optionally, the contact assembly comprises:

[0018] A contact bridge support is slidably connected to the base, and a contact bridge slot is provided on the contact bridge support;

[0019] A movable contact bridge, inserted into the contact bridge slot;

[0020] A second elastic member, wherein one end of the second elastic member abuts against the base, and the other end abuts against the contact bridge support.

[0021] Optionally, a guide groove extending along a first direction is provided on the contact bridge support, and a guide protrusion is provided on the base, and the guide protrusion is inserted into the guide groove.

[0022] Optionally, the push rod assembly comprises:

[0023] A push rod, wherein a first end of the push rod is provided with a first slot, the stop end of the lock assembly can be locked in the first slot, a second end of the push rod is provided with a push surface, a matching surface is provided on the contact bridge support, and the push surface is in contact with the matching surface;

[0024] The torsion elastic member is arranged on the base, and the torsion elastic member is used to apply a force along a first direction to the push rod.

[0025] Optionally, the push rod assembly also includes a reset button, which is slidably arranged on the base along a direction perpendicular to the first direction, and the reset button is provided with a reset driving inclined surface, and the first end of the push rod is provided with a reset passive inclined surface. After the thermal relay operating mechanism is tripped, the reset button is pressed, and the reset driving inclined surface slides in contact with the reset passive inclined surface to make the push rod move in the opposite direction of the first direction.

[0026] Optionally, the torsion elastic member is a torsion spring, a mounting boss is provided in the base, the torsion spring is sleeved on the mounting boss, one end of the torsion spring abuts against the reset button, and the other end abuts against the push rod.

[0027] Optionally, the trip assembly comprises:

[0028] A second lever is rotatably disposed in the base, and one end of the second lever is provided with an assembly shaft and a driven part;

[0029] A cam is sleeved on the assembly shaft and fixed coaxially with the assembly shaft, and the second end of the first lever overlaps the outer peripheral surface of the cam;

[0030] The third lever is linked with the active bimetallic strip, and a pushing part is arranged on the third lever, and the pushing part abuts against the driven part.

[0031] Optionally, a first rotating shaft perpendicular to the first lever is provided in the middle of the first lever, and the thermal relay operating mechanism further includes an adjusting component, and the adjusting component includes:

[0032] A second rotating shaft is disposed on the second lever;

[0033] An adjusting rod, wherein a first through hole and a second through hole are arranged at intervals on the adjusting rod, one end of the first rotating shaft is rotatably connected to the base, the other end of the first rotating shaft is inserted into the first through hole, and the second rotating shaft is inserted into the second through hole.

[0034] Another object of the utility model is to provide a thermal relay, which simplifies the internal structure of the thermal relay, improves the assembly efficiency of the thermal relay, and ensures that the thermal relay is more stable and reliable.

[0035] To achieve this purpose, the utility model adopts the following technical solutions:

[0036] A thermal relay comprises a base, a cover plate and the above-mentioned thermal relay operating mechanism, wherein the thermal relay operating mechanism is arranged in the base, and the cover plate is detachably connected to the base.

[0037] Beneficial effects:

[0038] The thermal relay operating mechanism provided by the utility model is characterized in that the first lever is rotatably connected to the base, the stop end of the lock assembly is arranged at the first end of the first lever, and the stop end of the lock assembly can be engaged with the push rod assembly to prevent the push rod assembly from driving the contact assembly to move along the first direction to achieve locking; the driving end of the release assembly abuts against the second end of the first lever, and the release assembly is used to drive the first lever to rotate so that the stop end of the lock assembly is disengaged from the push rod assembly to achieve disengagement; the thermal relay operating mechanism is respectively provided with a lock assembly and a release assembly at both ends of the first lever, and the locking and disengagement are cleverly achieved by utilizing the rotation of the first lever, thereby simplifying the structure of the thermal relay operating mechanism, making the internal structure of the thermal relay more compact, and reducing the size of the thermal relay; the thermal relay operating mechanism is assembled using modular components, which is easy to operate and the assembly process is faster, thereby reducing labor costs and assembly time, and improving the assembly efficiency of the thermal relay operating mechanism.

[0039] The thermal relay provided by the utility model comprises a base, a cover plate and the above-mentioned thermal relay operating mechanism, wherein the thermal relay operating mechanism is arranged in the base, and the cover plate is detachably connected to the base. The combination of the base, the cover plate and the thermal relay operating mechanism simplifies the internal structure of the thermal relay, improves the assembly efficiency of the thermal relay, and ensures that the thermal relay is more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the thermal relay operating mechanism provided by the utility model at one viewing angle;

[0041] Figure 2 It is a structural schematic diagram of the thermal relay operating mechanism provided by the utility model from another perspective;

[0042] Figure 3 It is an exploded diagram of the thermal relay operating mechanism provided by the utility model;

[0043] Figure 4 It is a schematic diagram of the structure of the thermal relay provided by the utility model;

[0044] Figure 5 It is a schematic diagram of the internal structure of the thermal relay provided by the utility model;

[0045] Figure 6 It is a schematic diagram of the base structure provided by the utility model;

[0046] Figure 7 It is a schematic diagram of the cover plate structure provided by the utility model.

[0047] In the figure:

[0048] 100, contact assembly; 110, contact bridge support; 111, contact bridge slot; 112, guide groove; 113, second boss; 114, assembly rod; 120, movable contact bridge; 130, second elastic member;

[0049] 200, push rod assembly; 210, push rod; 211, first slot; 212, reset driven inclined surface; 213, torsion spring stopper; 214, assembly hole; 215, first convex shaft; 220, torsion elastic member; 230, reset button; 231, reset driving inclined surface; 232, torsion spring slot;

[0050] 300, first lever; 310, first rotating shaft; 320, first boss;

[0051] 400, lock assembly; 410, stop pin; 420, first elastic member;

[0052] 500, release assembly; 510, second lever; 511, driven part; 512, assembly shaft; 513, arc-shaped avoidance hole; 520, cam; 521, raised part; 522, slot; 530, third lever; 531, push part;

[0053] 600, adjustment component; 610, second rotating shaft; 620, adjustment rod; 621, first through hole; 622, second through hole; 623, latch;

[0054] 700, indicating member; 710, indicating portion; 720, opening groove; 730, second convex shaft;

[0055] 800, thermal relay; 810, base; 811, guide protrusion; 812, assembly boss; 813, inspection window; 814, first groove; 815, second groove; 816, first rotation groove; 817, second rotation groove; 818, first hook groove; 820, cover plate; 821, spring piece; 8211, second card slot; 822, first hook; 823, second hook; 824, cam adjustment hole; 825, limit boss; 830, auxiliary contact group; 840, active bimetallic strip; 850, connecting plate; 860, conductive rod. DETAILED DESCRIPTION

[0056] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0057] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0059] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0060] This embodiment provides a thermal relay operating mechanism, such as Figure 1-Figure 3 As shown, the thermal relay operating mechanism includes a contact assembly 100, a push rod assembly 200, a first lever 300, a lock assembly 400 and a trip assembly 500. The contact assembly 100 is slidably connected to the base 810, and the push rod assembly 200 is used to push the contact assembly 100 to move along a first direction; the first lever 300 is rotatably connected to the base 810, and the stop end of the lock assembly 400 is set at the first end of the first lever 300. The stop end of the lock assembly 400 can be engaged with the push rod assembly 200 is engaged to prevent the push rod assembly 200 from driving the contact assembly 100 to move in the first direction, thereby achieving locking; the driving end of the tripping assembly 500 abuts against the second end of the first lever 300, and the tripping assembly 500 is used to drive the first lever 300 to rotate so that the stop end is disengaged from the push rod assembly 200, thereby achieving tripping, so that the push rod assembly 200 drives the contact assembly 100 to move in the first direction, thereby achieving switching between normally open and normally closed of the auxiliary contact group 830.

[0061] The thermal relay 800 operating mechanism is provided with a locking assembly 400 and a tripping assembly 500 at both ends of the first lever 300, respectively. The locking and tripping are cleverly achieved by rotating the first lever 300, thereby simplifying the structure of the thermal relay 800 operating mechanism, making the internal structure of the thermal relay 800 more compact, and reducing the size of the thermal relay 800. In addition, the thermal relay 800 operating mechanism is assembled using modular components, which is easy to operate and the assembly process is faster, thereby reducing labor costs and assembly time, and improving the assembly efficiency of the thermal relay 800 operating mechanism.

[0062] Optionally, the lock assembly 400 includes a stop pin 410 and a first elastic member 420. The stop pin 410 is arranged at the first end of the first lever 300, that is, the stop pin 410 is the stop end of the lock assembly 400. The first elastic member 420 and the stop pin 410 are respectively located on both sides of the first end of the first lever 300. One end of the first elastic member 420 abuts against the base 810, and the other end abuts against the first lever 300. The first elastic member 420 can drive the first lever 300 to rotate along the first circumferential direction so that the stop pin 410 is clamped on the push rod assembly 200 to achieve locking. When the driving end of the release assembly 500 drives the first lever 300 to rotate along the second circumferential direction, the first end of the first lever 300 compresses the first elastic member 420, and the stop pin 410 is disengaged from the push rod assembly 200 to achieve release. The first circumferential direction is opposite to the second circumferential direction. The locking assembly 400 has a simple structure and is easy to manufacture and assemble. It can also reliably realize the locking function, thereby improving the stability and reliability of the operating mechanism of the thermal relay 800.

[0063] Optionally, the first lever 300 is rotatably connected to the base 810 via the first rotating shaft 310. Specifically, the first rotating shaft 310 is located in the middle of the first lever 300 and is perpendicular to the first lever, the stop pin 410 is located on the first end of the first lever 300, the stop pin 410 and the first rotating shaft 310 are parallel to each other, and the stop pin 410 and the first rotating shaft 310 are both fixed to the first lever 300 by welding, and the connection by welding ensures the stability of the connection between the stop pin 410 and the first rotating shaft 310 and the first lever 300, thereby ensuring the reliability of the tripping action.

[0064] Exemplarily, in order to facilitate the description of the movement direction of the contact assembly 100, the movement direction of the contact assembly 100 when tripped is defined as a first direction, and the movement direction of the contact assembly 100 when locked is defined as a third direction. The first direction is opposite to the third direction, and the second direction is perpendicular to the first direction and vertically downward, and the second direction is perpendicular to the first direction and vertically upward.

[0065] Optionally, a first boss 320 is provided on the side of the first end of the first lever 300 away from the stop pin 410, a first groove 814 is provided on the base 810, one end of the first elastic member 420 is sleeved on the first boss 320, and the other end is located in the first groove 814 to ensure the stability of the first elastic member 420. In this embodiment, the first elastic member 420 is a spring, which has high strength and good elasticity, and can ensure that sufficient elasticity is provided for the stop pin 410, ensuring that the stop pin 410 is stably clamped in the first clamping groove 211.

[0066] Alternatively, if Figure 1-Figure 3 As shown, the contact assembly 100 includes a contact bridge support 110, a moving contact bridge 120 and a second elastic member 130. The contact bridge support 110 is slidably connected to the base 810. A contact bridge slot 111 is provided on the contact bridge support 110. The moving contact bridge 120 is inserted into the contact bridge slot 111. One end of the second elastic member 130 abuts against the base 810, and the other end abuts against the contact bridge support 110, which can provide a resetting elastic force for the contact bridge support 110, and the second elastic member 130 can provide contact pressure when the moving contact bridge 120 contacts the static contact, thereby ensuring reliable contact between the moving contact bridge 120 and the static contact, thereby effectively transmitting the current signal and ensuring the normal operation of the circuit.

[0067] Optionally, the contact bridge support 110 is provided with a second boss 113, the base 810 is provided with a second groove 815, one end of the second elastic member 130 is arranged in the second groove 815, and the other end is sleeved on the second boss 113, so as to ensure the stability of the second elastic member 130 and the stability and reliability of the movement of the contact bridge support 110. In this embodiment, the second elastic member 130 is a spring, which can ensure that sufficient elastic force is provided for the reset of the contact support.

[0068] Optionally, in this embodiment, two auxiliary contact groups 830 are provided on the base 810, and two contact bridge slots 111 are relatively arranged on the contact bridge support 110, and after the contact bridge support 110 is assembled on the base 810, the two moving contact bridges 120 are located between the two auxiliary contact groups 830. Before tripping, the moving contact bridge 120 on the left side abuts against the auxiliary contact group 830 on the left side, and the moving contact bridge 120 on the right side is separated from the auxiliary contact group 830 on the right side. After tripping, the moving contact bridge 120 on the left side is separated from the auxiliary contact group 830 on the left side, and the moving contact bridge 120 on the right side abuts against the auxiliary contact group 830 on the right side, thereby realizing the switching between the normally closed and normally opened auxiliary contact groups 830, so that the thermal relay 800 meets the actual use requirements of the circuit. It can be understood that an auxiliary contact group 830 includes two static contacts, and the two static contacts are arranged in the base 810 at intervals along the second direction. When the moving contact bridge 120 abuts against the auxiliary contact group 830, the two ends of the moving contact bridge 120 are respectively connected to a static contact, thereby achieving circuit conduction.

[0069] Optionally, the contact bridge support 110 is provided with a guide groove 112 extending along the first direction, and the base 810 is provided with a guide protrusion 811, which is inserted into the guide groove 112. Through the cooperation of the guide groove 112 and the guide protrusion 811, the contact bridge support 110 is effectively guided to move along the first direction during the tripping process, ensuring the stability of the contact bridge support 110 during the movement.

[0070] Alternatively, if Figure 1-Figure 3 As shown, the push rod assembly 200 includes a push rod 210 and a torsional elastic member 220. The first end of the push rod 210 is provided with a first card slot 211, and the stop pin 410 can be clamped in the first card slot 211. The second end of the push rod 210 is provided with a pushing surface, and the contact bridge support 110 is provided with a matching surface. The pushing surface is in contact with the matching surface, and the torsional elastic member 220 is arranged on the base 810. The torsional elastic member 220 is used to apply a force along the first direction to the push rod 210, so that after the stop pin 410 is disengaged from the first card slot 211 of the push rod 210, the elastic force of the torsional elastic member 220 can drive the push rod 210 to drive the contact bridge support 110 to move along the first direction, thereby completing the normally closed and normally open switching of the auxiliary contact group 830.

[0071] Optionally, an assembly hole 214 is provided on the push rod 210, and an assembly rod 114 is provided on the contact bridge support 110 corresponding to the assembly hole 214. The contact bridge support 110 and the push rod 210 are arranged side by side in the base 810, and the assembly rod 114 on the contact bridge support 110 is passed through the assembly hole 214 of the push rod 210, thereby further improving the stability of the connection between the push rod 210 and the contact bridge support 110, and ensuring that during the tripping process, the push rod 210 can quickly drive the contact bridge support 110 to move to achieve rapid switching of the normally closed and normally open auxiliary contact group 830.

[0072] Alternatively, if Figure 1-Figure 3As shown, the push rod assembly 200 also includes a reset button 230, which is slidably arranged on the base 810 along a direction perpendicular to the first direction, that is, the reset button 230 can reciprocate in the second direction and the fourth direction, and a reset driving inclined surface 231 is provided at the bottom of the reset button 230, and a reset passive inclined surface 212 is provided at the first end of the push rod 210. After the thermal relay operating mechanism is tripped, the push rod 210 pushes the contact bridge support 110 to move in the first direction under the elastic force of the torsion elastic member 220, and the moving contact bridge 120 on the contact bridge support 110 is separated from its corresponding auxiliary contact group 830 to achieve opening; when the reset button 230 is pressed, the reset driving inclined surface 231 slides in contact with the reset passive inclined surface 212, so that the push rod 210 moves in the third direction (the third reverse direction is the opposite direction of the first direction) until the stop pin 410 of the lock assembly 400 is engaged in the first card slot 211 of the push rod 210, thereby resetting the push rod 210; at the same time, the contact bridge support 110 is freed from the thrust of the push rod 210, and under the elastic force of the second elastic member 130, the contact bridge support 110 is also reset, and the moving contact bridge 120 on the contact bridge support 110 is re-engaged with its corresponding auxiliary contact group 830 to achieve closing.

[0073] Optionally, an assembly boss 812 is provided on the base 810, and the torsion elastic member 220 is a torsion spring, which is sleeved on the assembly boss 812. One end of the torsion spring abuts against the reset button 230, and the other end abuts against the push rod 210. The torsion spring can provide a resetting elastic force for the reset button 230, so that the reset button 230 can return quickly after being pressed. At the same time, the torsion spring provides a thrust for the push rod 210 to push the contact bridge support 110, thereby simplifying the structure of the thermal relay operating mechanism, saving space, and reducing the volume of the thermal relay 800.

[0074] Optionally, a torsion spring slot 232 is provided on the reset button 230, and a torsion spring stop 213 is provided at the second end of the push rod 210. One end of the torsion spring is clamped in the torsion spring slot 232, and the other end of the torsion spring abuts against the torsion spring stop 213, thereby ensuring a reliable connection of the torsion spring between the reset button 230 and the push rod 210.

[0075] Optionally, the trip assembly 500 includes a second lever 510, a cam 520 and a third lever 530. The second lever 510 is rotatably arranged in the base 810. One end of the second lever 510 is provided with an assembly shaft 512 and a driven portion 511. The cam 520 is sleeved on the assembly shaft 512 and fixed coaxially with the assembly shaft 512. The second end of the first lever 300 overlaps the outer peripheral surface of the cam 520. The third lever 530 is linked with the active bimetallic strip 840. The third lever 530 is provided with a pushing portion 531, and the pushing portion 531 abuts against the driven portion 511. When the active bimetal strip 840 is deformed by heat, the end of the active bimetal strip 840 pushes the third lever 530 to the right, and the pushing portion 531 of the third lever 530 pushes the driven portion 511 of the second lever 510 to the right, causing the second lever 510 to rotate. After the second lever 510 rotates, the protrusion 521 of the cam 520 drives the first lever 300 to rotate along the second circumferential direction, thereby causing the stop pin 410 to disengage from the first slot 211 of the push rod 210, thereby achieving disengagement. Under the elastic force of the torsional elastic member 220, the push rod 210 pushes the contact bridge support 110 to move in the first direction, and the moving contact bridge 120 is separated from the auxiliary contact group 830 to protect the circuit safety.

[0076] Optionally, the thermal relay operating mechanism also includes a connecting plate 850, which is provided with a first socket and a second socket, one end of the active bimetallic strip 840 is inserted into the socket, and a protrusion is provided at the bottom of the third lever 530, which is inserted into the connecting plate 850. When the active bimetallic strip 840 is bent by heat, the top end of the active bimetallic strip 840 moves to the right, and at the same time, the third lever 530 moves to the right along with the connecting plate 850, thereby realizing the linkage between the third lever 530 and the active bimetallic strip 840.

[0077] Optionally, in this embodiment, the first lever 300 is an auxiliary bimetallic strip, which is divided into an active layer and a passive layer (i.e., the auxiliary bimetallic strip located on the second direction side is the active layer, and the auxiliary bimetallic strip located on the fourth direction side is the passive layer). When the ambient temperature is higher than the normal working temperature, the auxiliary bimetallic strip bends and arches upward on both sides to provide temperature compensation. Compared with other temperature compensation mechanisms, such as additional temperature sensors or electronic control units, the auxiliary bimetallic strip has a lower design cost and does not require complex circuit control.

[0078] In this embodiment, the auxiliary bimetallic strip serves as a component of temperature compensation and works in conjunction with the main bimetallic strip to stably and reliably realize the function of temperature compensation. This design can effectively improve the reliability and stability of the thermal relay 800 and ensure its normal operation in various working environments.

[0079] Alternatively, if Figure 1-Figure 3As shown, the middle part of the first lever 300 is provided with a first rotating shaft 310 perpendicular to the first lever 300, the thermal relay operating mechanism also includes an adjusting assembly 600, the adjusting assembly 600 includes a second rotating shaft 610 and an adjusting rod 620, the first rotating shaft 310 is welded to the first lever 300, the second rotating shaft 610 is arranged on the second lever 510, the adjusting rod 620 is provided with a first through hole 621 and a second through hole 622 at intervals, one end of the first rotating shaft 310 is rotatably connected to the base 810, the other end of the first rotating shaft 310 is inserted in the first through hole 621, and the second rotating shaft 610 is inserted in the second through hole 622. The adjusting rod 620 can be moved in the first direction and the third direction, the first direction is the large gear direction, and the third direction is the small gear direction. When the adjusting rod 620 is moved in the first direction, the cam 520 moves in the second direction. At this time, the main double metal needs to increase the bending amount (i.e., increase the current) to make the product trip. By adjusting the component 600 , the action parameters of the thermal relay 800 can be flexibly adjusted according to specific working requirements to adapt to different working environments and load conditions, thereby improving the application scope and performance of the thermal relay 800 .

[0080] Optionally, a first rotation groove 816 is provided on the base 810 corresponding to the first rotation shaft 310, one end of the first rotation shaft 310 is inserted in the first rotation groove 816, and the other end is inserted in the first through hole 621 of the adjusting rod 620, thereby ensuring that the first lever 300 rotates more smoothly, and also ensuring that the adjusting rod 620 rotates more smoothly, thereby improving the accuracy of adjustment of the adjusting rod 620.

[0081] Optionally, an arc-shaped avoidance hole 513 is provided on the second lever 510 , and the arc-shaped avoidance hole 513 is used to avoid the first rotating shaft 310 to prevent the adjusting rod 620 from interfering with the first rotating shaft 310 when moving.

[0082] Optionally, the thermal relay operating mechanism also includes an indicator member 700, the middle part of the indicator member 700 is rotatably connected to the base 810, one end of the indicator member 700 is provided with an indicator portion 710, the other end of the indicator member 700 is rotatably connected to the push rod assembly 200, and an inspection window 813 is provided on the base 810. The push rod assembly 200 pushes the contact assembly 100 to move along the first direction, which can drive the indicator portion 710 to rotate into the field of view of the inspection window 813. The user can clearly observe the position of the indicator portion 710 through the inspection window 813, thereby understanding the current state of the thermal relay 800.

[0083] Alternatively, if Figure 1-Figure 3As shown, the indicator 700 is provided with an open slot 720, the second end of the push rod 210 is provided with a first convex shaft 215, the first convex shaft 215 is arranged on the torsion spring stop 213, and the open slot 720 is inserted on the first convex shaft 215, so as to realize the rotational connection between the indicator 700 and the push rod 210. When the push rod 210 moves in the first direction, the push rod 210 pushes the indicator 700 to rotate, and the indicating portion 710 of the indicator 700 can move in the third direction to the field of view of the inspection window 813, so that the operator can easily understand the working status of the thermal relay 800.

[0084] Optionally, a second cam 730 is provided on the middle side of the indicator 700 close to the base 810, and a second rotation groove 817 is provided on the base 810. The second cam 730 is inserted into the second rotation groove 817 and is rotatably connected to the base 810 to ensure that the indicator 700 rotates smoothly and ensure that the indicator part 710 accurately reflects the working status of the thermal relay 800.

[0085] like Figure 4-Figure 7 As shown, this embodiment also provides a thermal relay 800, including a base 810, a cover plate 820 and the above-mentioned thermal relay operating mechanism, the thermal relay operating mechanism is arranged in the base 810, and the cover plate 820 is detachably connected to the base 810. The combination of the base 810, the cover plate 820 and the thermal relay operating mechanism simplifies the internal structure of the thermal relay 800, improves the assembly efficiency of the thermal relay 800, and ensures that the thermal relay 800 is more stable and reliable.

[0086] Optionally, a latch 623 is provided on the adjustment rod 620, and a spring sheet 821 is provided on the cover plate 820. Along the first direction, a plurality of second slots 8211 are provided on the spring sheet 821 at intervals, and the latch 623 can be latched in any second slot 8211. When the latch 623 is latched in a specific second slot 8211, the position of the adjustment rod 620 can be stably fixed, and the accidental change of the adjustment position due to external vibration or interference can be prevented, thereby ensuring the stability of the adjustment rod 620. In addition, the spring sheet 821 has a certain elastic force, which can ensure that the latch 623 is stably latched in the second slot 8211, further ensuring the stability of the position of the adjustment rod 620, thereby improving the stability and reliability of the thermal relay 800. The position of the adjustment rod 620 can be finely adjusted through the tongue 623 on the adjustment rod 620 and the spring 821 on the base 810. The multiple second slots 8211 on the spring 821 provide multiple fixed positions, and the tongue 623 can be flexibly clamped in any second slot 8211, thereby achieving different degrees of adjustment and improving the accuracy and flexibility of adjustment.

[0087] Optionally, one of the cover plate 820 and the base 810 is provided with a first hook groove 818, and the other of the cover plate 820 and the base 810 is provided with a first hook 822, and the first hook 822 is snapped onto the first hook groove 818, thereby enabling quick installation of the cover plate 820 and the base 810, ensuring the reliability of the connection between the cover plate 820 and the base 810, and improving the efficiency of disassembly and assembly of the cover plate 820 and the base 810.

[0088] In an optional embodiment, the top and bottom ends of the cover plate 820 are provided with a first hook 822, and the top and bottom ends of the base 810 are provided with a first hook groove 818. Each first hook 822 is correspondingly snapped into the first hook groove 818, which can effectively prevent the cover plate 820 and the base 810 from loosening or falling off during use, thereby ensuring the stability and reliability of the entire thermal relay 800 structure.

[0089] In an optional embodiment, the top and bottom ends of the cover plate 820 are provided with a first hook groove 818, and the top and bottom ends of the base 810 are provided with a first hook 822. Each first hook 822 is correspondingly snapped into the first hook groove 818, which can effectively prevent the cover plate 820 and the base 810 from loosening or falling off during use, thereby ensuring the stability and reliability of the entire thermal relay 800 structure.

[0090] In an optional embodiment, a second hook 823 is provided in the middle of the cover plate 820, and a second hook groove is provided in the middle of the base 810. The second hook 823 is snapped into the second hook groove, which can ensure the stability of the connection of the cover plate 820, and apply tension in the middle of the cover plate 820 to prevent the cover plate 820 from deforming, thereby improving the stability of the thermal relay 800 structure.

[0091] In an optional embodiment, a second hook groove is provided in the middle of the cover plate 820, and a first hook 822 is provided in the middle of the base 810. The second hook 823 is snapped into the second hook groove, which can ensure the stability of the connection of the cover plate 820, and apply tension in the middle of the cover plate 820 to prevent the cover plate 820 from deforming, thereby improving the stability of the thermal relay 800 structure.

[0092] Optionally, a conductive rod 860 limiting boss 825 is provided on the inner side of the cover plate 820, a conductive rod 860 mounting groove is provided in the base 810, the conductive rod 860 is arranged in the conductive rod 860 mounting groove, the cover plate 820 is buckled on the base 810, and the conductive rod 860 limiting boss 825 is used to press the conductive rod 860 into the conductive rod 860 mounting groove to ensure the stability of the conductive rod 860.

[0093] Optionally, a cam adjustment hole 824 is provided corresponding to the cam 520. After the cover plate 820 is covered on the base 810, the operator can adjust the cam 520 to a suitable angle through the cam adjustment hole 824 to adapt to the operating current of the current circuit. After the adjustment is completed, glue is applied to the installation position of the cam 520 through the cam adjustment hole 824 to ensure that the cam 520 is more firmly installed on the assembly shaft 512, thereby further improving the stability of the cam 520.

[0094] Optionally, a slot 522 is provided on the side of the cam 520 facing the cover plate 820, through which the operator can easily rotate the cam 520 with a slotted screwdriver, so as to facilitate adjustment of the position of the raised portion 521 on the cam 520, thereby improving the convenience of adjustment.

[0095] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Thermal relay operating mechanism, characterized in that: include: A contact assembly (100) is slidably connected to a base (810); A push rod assembly (200), the push rod assembly (200) being used to push the contact assembly (100) to move along a first direction; A first lever (300), the first lever (300) being rotatably connected to the base (810); A lock assembly (400), wherein a stop end of the lock assembly (400) is arranged at the first end of the first lever (300), and the stop end of the lock assembly (400) can be engaged with the push rod assembly (200) to prevent the push rod assembly (200) from driving the contact assembly (100) to move along the first direction; A release assembly (500), wherein the driving end of the release assembly (500) abuts against the second end of the first lever (300), and the release assembly (500) is used to drive the first lever (300) to rotate so that the stop end is released from the push rod assembly (200).

2. The thermal relay operating mechanism according to claim 1, characterized in that: The locking assembly (400) comprises: A stop pin (410) is arranged at a first end of the first lever (300); A first elastic member (420), wherein the first elastic member (420) and the stop pin (410) are respectively located on both sides of the first end of the first lever (300), and one end of the first elastic member (420) abuts against the base (810), and the other end abuts against the first lever (300).

3. The thermal relay operating mechanism according to claim 1, characterized in that: The contact assembly (100) comprises: A contact bridge support (110) is slidably connected to the base (810), and a contact bridge slot (111) is provided on the contact bridge support (110); A movable contact bridge (120) is inserted into the contact bridge slot (111); A second elastic member (130), wherein one end of the second elastic member (130) abuts against the base (810), and the other end abuts against the contact bridge support (110).

4. The thermal relay operating mechanism according to claim 3, characterized in that: The contact bridge support (110) is provided with a guide groove (112) extending along a first direction, and the base (810) is provided with a guide protrusion (811), and the guide protrusion (811) is inserted into the guide groove (112).

5. The thermal relay operating mechanism according to claim 3, characterized in that: The push rod assembly (200) comprises: A push rod (210), wherein a first end of the push rod (210) is provided with a first slot (211), a stop end of the lock assembly (400) can be locked in the first slot (211), a second end of the push rod (210) is provided with a push surface, a matching surface is provided on the contact bridge support (110), and the push surface is in contact with the matching surface; A torsional elastic member (220) is disposed on the base (810), and the torsional elastic member (220) is used to apply a force along a first direction to the push rod (210).

6. The thermal relay operating mechanism according to claim 5, characterized in that: The push rod assembly (200) further comprises a reset button (230), wherein the reset button (230) is slidably disposed on the base (810) along a direction perpendicular to the first direction, the reset button (230) is provided with a reset driving inclined surface (231), and the first end of the push rod (210) is provided with a reset passive inclined surface (212). After the thermal relay operating mechanism is tripped, the reset button is pressed, and the reset driving inclined surface (231) is in sliding contact with the reset passive inclined surface (212), so that the push rod (210) moves in the opposite direction of the first direction.

7. The thermal relay operating mechanism according to claim 6, characterized in that: The torsion elastic member (220) is a torsion spring. An assembly boss (812) is provided in the base (810). The torsion spring is sleeved on the assembly boss (812). One end of the torsion spring abuts against the reset button (230), and the other end abuts against the push rod (210).

8. The thermal relay operating mechanism according to claim 1, characterized in that: The trip assembly (500) comprises: A second lever (510) is rotatably disposed in the base (810), and one end of the second lever (510) is provided with an assembly shaft (512) and a driven portion (511); A cam (520) is sleeved on the assembly shaft (512) and fixed coaxially with the assembly shaft (512), and the second end of the first lever (300) overlaps the outer peripheral surface of the cam (520); The third lever (530) is linked to the active bimetallic strip (840), and a pushing portion (531) is provided on the third lever (530), and the pushing portion (531) is in contact with the driven portion (511).

9. The thermal relay operating mechanism according to claim 8, characterized in that: A first rotating shaft (310) perpendicular to the first lever (300) is provided in the middle of the first lever (300). The thermal relay operating mechanism further includes an adjusting component (600). The adjusting component (600) includes: A second rotating shaft (610) is disposed on the second lever (510); An adjusting rod (620), wherein a first through hole (621) and a second through hole (622) are arranged at intervals on the adjusting rod (620), one end of the first rotating shaft (310) is rotatably connected to the base (810), the other end of the first rotating shaft (310) is inserted into the first through hole (621), and the second rotating shaft (610) is inserted into the second through hole (622).

10. Thermal relay, characterized in that, It comprises a base (810), a cover plate (820) and a thermal relay operating mechanism as claimed in any one of claims 1 to 9, wherein the thermal relay operating mechanism is arranged in the base (810), and the cover plate (820) is detachably connected to the base (810).

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