Assembly equipment for thermal relays

Abstract

This invention relates to the field of thermal relay assembly technology, specifically disclosing an assembly device for thermal relays used to assemble thermal elements. The assembly device includes a tray mechanism, a feeding mechanism, a transfer mechanism, and an assembly mechanism. First, the feeding mechanism clamps at least three thermal elements from the tray mechanism and moves them to the transfer area. Then, an adjuster adjusts the distance between the at least three transfer jaws, allowing each jaw to clamp at least three thermal elements in the transfer area. Subsequently, the adjuster again adjusts the distance between the at least three transfer jaws so that at least three assembly components can respectively clamp the thermal elements on the at least three transfer jaws, and the thermal elements on the at least three assembly components are respectively inserted into the mounting slots of at least three carriers. This device solves the problems of low assembly efficiency and poor assembly consistency of thermal elements on one carrier.

Description

Technical Field

[0001] This invention relates to the field of thermal relay assembly technology, and more particularly to thermal relay assembly equipment. Background Technology

[0002] Thermal relays, as overload protection components, are widely used in production due to their advantages such as small size, simple structure, and low cost. The thermal element of a thermal relay is a component that generates heat through current, causing a bimetallic strip to deform. When current passes through the thermal element, the generated heat causes the bimetallic strip to deform due to its different coefficients of expansion. When the deformation reaches a certain distance, it pushes a linkage to disconnect the control circuit, thereby achieving overload protection for the motor.

[0003] The main structure of the thermal element includes a bimetallic strip, a resistance wire, a metal rod, and a conductive plate. One end of the bimetallic strip is fixed to the conductive plate, and the other end is connected to a connecting rod. The resistance wire is wound around the bimetallic strip. One end of the metal rod is connected to the resistance wire, and the other end and the conductive plate are respectively connected to the terminals of the thermal relay. The working principle of the thermal relay is that the current flowing into the thermal element generates heat, causing the bimetallic strip, which has different coefficients of expansion, to deform. When the deformation reaches a certain distance, it pushes the connecting rod to act, disconnecting the control circuit, thereby de-energizing the contactor, disconnecting the main circuit, and achieving overload protection.

[0004] In the assembly process of thermal relays, the manufacturing precision of the thermal element plays a crucial role in the performance of the thermal relay. Currently, before testing the thermal element, it is usually assembled manually onto a copying mold, and then the thermal element on the copying mold is tested using relevant equipment. However, manual assembly suffers from low assembly efficiency and poor consistency among multiple thermal elements assembled on a single carrier.

[0005] Therefore, there is an urgent need for thermal relay assembly equipment to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an assembly device for thermal relays, thereby solving the problems in the related art where the detection of thermal elements on the mold during the assembly process of thermal relays is inefficient and the assembly consistency of multiple thermal elements on a carrier is poor.

[0007] The present invention provides an assembly device for a thermal relay, the thermal relay comprising at least three thermal elements, the assembly device comprising a tray mechanism, a feeding mechanism, a transfer mechanism, and an assembly mechanism, the transfer mechanism comprising an adjuster and at least three transfer grippers, the assembly mechanism comprising a conveying component, at least three assembly components, and at least three carriers, wherein the at least three thermal elements, the at least three transfer grippers, the at least three assembly components, and the at least three carriers correspond one-to-one, and the carriers are provided with mounting slots;

[0008] A tray mechanism for placing the thermal element;

[0009] The feeding mechanism is used to transfer the heating element on the pallet mechanism to the transfer area;

[0010] A transfer mechanism is provided in the transfer area. The adjuster is used to adjust the distance between the transfer grippers to match the distance between the heat elements transferred to the transfer area. The transfer grippers are configured to grip the heat elements after the distance is matched. The adjuster is also used to adjust the distance between adjacent transfer grippers to match the distance between the assembly components of adjacent assembly mechanisms.

[0011] The conveying assembly is used to drive the vehicle to move, and the assembly assembly is configured to grip the thermal element on the corresponding rotating jaw and insert the thermal element on the assembly assembly into the mounting slot of the corresponding vehicle.

[0012] As a preferred technical solution for the assembly equipment of thermal relays, the thermal element includes a first conductive plate;

[0013] The feeding mechanism includes a gripping component and a first sliding member. The gripping component includes a base and at least three feeding claws. The at least three feeding claws are disposed on the base and correspond one-to-one with at least three transfer claws. The feeding claws grip the first conductive plate of the thermal element on the tray mechanism. The first sliding member is configured to drive the base to move so that the feeding claws deliver the gripped thermal element to the transfer area.

[0014] As a preferred technical solution for the assembly equipment of thermal relays, at least three of the rotating grippers are arranged in sequence, and at least three of the feeding grippers are arranged in sequence on the base;

[0015] The gripping assembly further includes a first driving unit, which drives the base to rotate so that the arrangement direction of the loading gripper located in the transfer area is consistent with the arrangement direction of the transfer gripper.

[0016] As a preferred technical solution for the assembly equipment of thermal relays, at least three of the feeding jaws are arranged in sequence along the direction of arrangement, including a first feeding jaw, a second feeding jaw, and a third feeding jaw.

[0017] The gripping assembly further includes an adjusting component, which is used to adjust the distance between the second feeding gripper and the third feeding gripper and the first feeding gripper, respectively.

[0018] Alternatively, the adjusting member is used to adjust the spacing between two adjacent feeding jaws among the first feeding jaw, the second feeding jaw, and the third feeding jaw.

[0019] As a preferred technical solution for the assembly equipment of thermal relays, the first feeding claw is fixedly connected to the base, and the second feeding claw and the third feeding claw are respectively slidably engaged with the base;

[0020] The adjusting component includes a cylinder, a connecting rod, and a drive pin. One end of the connecting rod is fixedly connected to the second feeding claw, and the other end of the connecting rod is provided with a first waist-shaped hole along the sliding direction of the third feeding claw. The drive pin passes through the first waist-shaped hole and is fixed to the third feeding claw. The cylinder drives the second feeding claw or the third feeding claw to slide relative to the base.

[0021] As a preferred technical solution for the assembly equipment of thermal relay, the regulator includes a support and an adjustment component. At least three rotating jaws include a first rotating jaw, a second rotating jaw, and a third rotating jaw arranged in sequence. The second rotating jaw is fixed to the support. The first rotating jaw and the third rotating jaw are slidably engaged with the support. The adjustment component drives the first rotating jaw and the third rotating jaw to slide relative to the support.

[0022] As a preferred technical solution for the assembly equipment of thermal relays, the adjustment component includes a timing belt, which includes an upper belt and a lower belt. The first rotating jaw is fixedly connected to the upper belt, and the third rotating jaw is fixedly connected to the lower belt.

[0023] As a preferred technical solution for the assembly equipment of the thermal relay, the thermal element further includes a second conductive plate and a third conductive plate, wherein the first conductive plate, the second conductive plate and the third conductive plate are perpendicular to each other;

[0024] The rotating gripper includes a support frame, a second driving part, and a first clamping part. The first clamping part is used to clamp the second conductive plate of the thermal element on the corresponding first feeding gripper. The second driving part is disposed on the support frame and is configured to drive the first clamping part to rotate so as to send the thermal element on the first clamping part to the clamping area.

[0025] The assembly assembly includes assembly grippers for holding the third conductive plate of the thermal element in the clamping region.

[0026] As a preferred technical solution for the assembly equipment of thermal relays, the thermal element further includes a conductive rod;

[0027] The rotating gripper also includes a second clamping part, the first clamping part and the second clamping part are fixedly connected to each other, and the second clamping part is used to clamp the conductive rod.

[0028] As a preferred technical solution for the assembly equipment of thermal relay, the assembly assembly further includes a second sliding member, which is configured to drive the assembly jaws to move so as to insert the first conductive plate of the thermal element on the assembly jaws into the mounting slot of the corresponding carrier.

[0029] As a preferred technical solution for the assembly equipment of thermal relay, the assembly jaw includes a third clamping part and an auxiliary pressing block. The auxiliary pressing block is fixed to the third clamping part. The third clamping part is used to clamp the third conductive plate of the thermal element on the rotating jaw. The auxiliary pressing block is used to abut against the first conductive plate. The second sliding member drives the auxiliary pressing block to press the first conductive plate into the mounting groove of the carrier.

[0030] As a preferred technical solution for the assembly equipment of thermal relays, the conveying assembly includes a conveyor belt located below the second sliding member, and the conveyor belt drives at least three of the carriers to move synchronously.

[0031] The assembly assembly also includes a lifter for positioning the carrier corresponding to the assembly gripper in a first position and a second position. In the first position, the carrier is located on the conveyor belt, and in the second position, the carrier is spaced apart from the conveyor belt.

[0032] As a preferred technical solution for the assembly equipment of thermal relays, the carrier is provided with lifting ears on both sides, and the two lifting ears extend out of the conveyor belt respectively;

[0033] The lifter includes a first drive member and two support plates. The two support plates are disposed on both sides of the conveyor belt. The two support plates are respectively opposite to the two lifting ears in the vertical direction. The first drive member simultaneously drives the two support plates to move in the vertical direction, so that the vehicle switches between the first position and the second position.

[0034] As a preferred technical solution for the assembly equipment of thermal relay, one of the lifting ears is provided with a round hole, and the other lifting ear is provided with a second oblong hole. The length direction of the second oblong hole is consistent with the spacing direction of the two support plates. The two support plates are respectively provided with limit pins, and the two support plates abut against the two lifting ears respectively, so that the two limit pins are respectively inserted into the round hole and the second oblong hole.

[0035] As a preferred technical solution for the assembly equipment of thermal relays, the lifter further includes a second driving member and two front limiting plates. The two front limiting plates are disposed on both sides of the conveyor belt. The second driving member simultaneously drives the two front limiting plates to move along the vertical direction. One end of the two front limiting plates is higher than the conveyor belt along the vertical direction, so that the two front limiting plates abut against one side of the two lifting ears along the moving direction of the carrier.

[0036] And / or, the lifter further includes a third drive member and a rear limiting plate, the third drive member driving the rear limiting plate to move along the vertical direction, one end of the rear limiting plate being higher than the conveyor belt along the vertical direction, so that the rear limiting plate abuts against the other side of the lifting lug along the conveying direction of the vehicle.

[0037] The beneficial effects of this invention are as follows:

[0038] This invention provides an assembly apparatus for thermal relays, used to simultaneously assemble at least three thermal elements into mounting slots of at least three carriers. The assembly apparatus includes a tray mechanism, a feeding mechanism, a transfer mechanism, and an assembly mechanism. First, the feeding mechanism clamps at least three thermal elements from the tray mechanism and moves them to the transfer area. Then, an adjuster adjusts the distance between the at least three transfer jaws, allowing each jaw to clamp the at least three thermal elements from the feeding mechanism. Subsequently, the adjuster further adjusts the distance between the at least three transfer jaws, positioning each jaw opposite at least three assembly components. At this point, each assembly component clamps the thermal elements from the at least three transfer jaws and inserts the thermal elements from the at least three assembly components into the mounting slots of the at least three carriers. Repeating this operation multiple times allows thermal elements to be assembled into multiple mounting slots on at least one carrier. This thermal relay assembly apparatus effectively assembles thermal elements onto carriers, thus solving the problems of low assembly efficiency and poor assembly consistency of multiple thermal elements on a single carrier. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the thermal element in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the assembly of the thermal element and the carrier in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the assembly equipment for the thermal relay in an embodiment of the present invention. Figure 1 ;

[0042] Figure 4 This is a schematic diagram of the assembly equipment for the thermal relay in an embodiment of the present invention. Figure 2 ;

[0043] Figure 5 This is a schematic diagram of the feeding mechanism in an embodiment of the present invention;

[0044] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0045] Figure 7 This is a schematic diagram of the structure of the transfer mechanism in an embodiment of the present invention. Figure 1 ;

[0046] Figure 8 for Figure 7 A magnified view of a section at point B in the middle;

[0047] Figure 9 This is a schematic diagram of the structure of the transfer mechanism in an embodiment of the present invention. Figure 2 ;

[0048] Figure 10 This is a schematic diagram of the assembly components in an embodiment of the present invention;

[0049] Figure 11 for Figure 10 A magnified view of a section at point C;

[0050] Figure 12 This is a schematic diagram of the assembly of the conveying component and the lifter in an embodiment of the present invention.

[0051] In the picture:

[0052] X, first direction; Y, second direction; Z, vertical direction;

[0053] 100. Heating element; 101. First conductive plate; 102. Second conductive plate; 103. Third conductive plate; 104. Conductive rod; 105. Resistance wire; 106. Bimetallic strip;

[0054] 1. Pallet mechanism;

[0055] 2. Feeding mechanism; 21. First support; 22. Gripping assembly; 221. Base; 222. Feeding gripper; 222a. First feeding gripper; 222b. Second feeding gripper; 222c. Third feeding gripper; 223. First drive unit; 224. Cylinder; 225. Connecting rod; 2251. First oblong hole; 226. Drive pin; 23. First sliding member; 231. First sliding part; 232. Second sliding part; 233. Third sliding part;

[0056] 3. Transfer mechanism; 31. Adjuster; 311. Support; 3121. Motor; 3122. Drive wheel; 3123. Driven wheel; 3124. Synchronous belt; 3125. Upper belt; 3126. Lower belt; 32. Transfer gripper; 32a. First transfer gripper; 32b. Second transfer gripper; 32c. Third transfer gripper; 321. Support frame; 3211. Fixing plate; 3212. Pressure plate; 322. Second drive unit; 323. Clamping unit; 3231. First clamping unit; 3232. Second clamping unit; 324. Belt;

[0057] 4. Assembly mechanism; 41. Conveying assembly; 411. Conveyor belt; 42. Assembly assembly; 421. Second bracket; 422. Second sliding member; 423. Assembly gripper; 4231. Third clamping part; 4232. Auxiliary pressure block; 4241. First driving member; 4242. First synchronization plate; 4243. Support plate; 4245. Second driving member; 4246. Second synchronization plate; 4247. Front limit plate; 4248. Third driving member; 4249. Third synchronization plate; 4250. Rear limit plate; 43. Carrier; 431. Mounting slot; 432. Lifting lug; 4321. Round hole; 4322. Second oblong hole. Detailed Implementation

[0058] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0061] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0062] like Figure 1 and Figure 2 As shown, the first conductive plate 101, the second conductive plate 102, and the third conductive plate 103 are perpendicular to each other. The heating element 100 includes the first conductive plate 101, the second conductive plate 102, the third conductive plate 103, the conductive rod 104, the resistance wire 105, and the bimetallic strip 106. The second conductive plate 102 and the third conductive plate 103 are disposed at both ends of the first conductive plate 101. The bimetallic strip 106 is fixedly connected to the third conductive plate 103. The resistance wire 105 is wound around the bimetallic strip 106. The conductive rod 104 is flexibly connected to the resistance wire 105.

[0063] The carrier 43 has multiple mounting slots 431 arranged sequentially. These slots correspond to the mounting slots of the thermal element 100 on the thermal relay housing. Therefore, detecting the shape of the thermal element 100 on the carrier 43 is equivalent to detecting the shape of the thermal element 100 installed inside the thermal relay housing. Thus, the efficiency and consistency of the thermal element 100 assembly on the carrier 43 are crucial. Preferably, there are 3, 6, or 9 mounting slots, etc.

[0064] To improve the efficiency of the heat element 100 assembly on the carrier 43 and the consistency of the heat element 100 assembly on the carrier 43, such as Figures 3 to 12 As shown, this embodiment provides an assembly device for a thermal relay. The assembly device for the thermal relay includes a tray mechanism 1, a feeding mechanism 2, a transfer mechanism 3, and an assembly mechanism 4. The transfer mechanism 3 includes an adjuster 31 and at least three transfer grippers 32. The assembly mechanism 4 includes a conveying component 41, at least three assembly components 42, and at least three carriers 43. The at least three thermal elements 100, the at least three transfer grippers 32, the at least three assembly components 42, and the at least three carriers 43 correspond one-to-one. The carriers 43 are provided with mounting slots 431.

[0065] A tray mechanism 1 is used to hold the heating elements 100, and one side of the tray mechanism 1 along the first direction X is set as a transfer area; a loading mechanism 2 is configured to grip the first conductive plate 101 of at least three heating elements 100 on the tray mechanism 1 and send the heating elements 100 to the transfer area, and the at least three heating elements 100 located in the transfer area are arranged sequentially along the second direction Y; a transfer mechanism 3 is disposed in the transfer area, and an adjuster 31 is configured to adjust the distance between two adjacent transfer grippers 32 along the second direction Y, and the transfer grippers 32 are configured to grip the first conductive plate 101 of the corresponding heating element 100 on the transfer area. Two conductive plates 102; a conveying assembly 41 is disposed on the side of the transfer mechanism 3 away from the pallet mechanism 1 along the first direction X, for driving at least three carriers 43 to move along the second direction Y, at least three assembly assemblies 42 are spaced apart along the second direction Y, and the plurality of assembly assemblies 42 are configured to respectively clamp the third conductive plate 103 of the thermal element 100 on at least three transfer grippers 32, and insert the first conductive plate 101 of the thermal element 100 on at least three assembly assemblies 42 into the mounting slots 431 of at least three carriers 43; the first direction X and the second direction Y are perpendicular. When the assembly equipment for the thermal relay is in operation, the feeding mechanism 2 first clamps the first conductive plates 101 of at least three thermal elements 100 on the tray mechanism 1 and moves them to the transfer area. At this time, at least three thermal elements 100 are arranged sequentially along the second direction Y. Then, the adjuster 31 adjusts the distance between at least three transfer jaws 32, so that at least three transfer jaws 32 can clamp the second conductive plates 102 of at least three thermal elements 100 respectively. Subsequently, the adjuster 31 adjusts the distance between at least three transfer jaws 32 again, so that at least three transfer jaws 32 are respectively opposite to at least three assembly components 42. At this time, at least three assembly components 42 clamp the third conductive plates 103 of the thermal elements 100 on at least three transfer jaws 32 respectively, and insert the first conductive plates 101 of the thermal elements 100 on at least three assembly components 42 into the mounting slots 431 of at least three carriers 43 respectively. By repeating the above operation multiple times, the thermal element 100 can be assembled in multiple mounting slots 431 of each of at least three carriers 43. The assembly equipment for this thermal relay can assemble the thermal element 100 onto the carrier 43, thereby solving the problems of low assembly efficiency and poor assembly consistency of multiple thermal elements 100 on the carrier 43.

[0066] Optionally, the heating elements 100 on the tray mechanism 1 are arranged in an array, with the rows and columns of the heating elements 100 arranged along the first direction X and the second direction Y, respectively.

[0067] In this embodiment, three feeding grippers 222, three rotating grippers 32, and three assembly components 42 are provided. The three heating elements 100 are also mounted on three carriers 43 for detailed explanation.

[0068] like Figure 3 and Figure 4 As shown, the feeding mechanism 2, pallet mechanism 1, transfer mechanism 3 and assembly mechanism 4 are arranged sequentially along the first direction X. The pallet mechanism 1 has a transfer area on the side away from the feeding mechanism 2 along the first direction X. The transfer mechanism 3 is located in the transfer area. The assembly mechanism 4 is located on the side of the transfer area away from the pallet mechanism 1 along the first direction X.

[0069] like Figure 5 and Figure 6 As shown, optionally, the feeding mechanism 2 includes a first support 21, a gripping assembly 22, and a first sliding member 23. The first support 21 is disposed on the side of the pallet mechanism 1 away from the transfer mechanism 3 along the first direction X. The first sliding member 23 is disposed on the first support 21. The gripping assembly 22 includes a base 221 and three feeding claws 222. The three feeding claws 222 are arranged sequentially on the base 221. The first sliding member 23 is configured to drive the base 221 to move, so that the three feeding claws 222 respectively grip the three heat elements 100 on the pallet mechanism 1 and send them to the transfer area. The three feeding claws 222 located in the transfer area are arranged sequentially along the second direction Y. In this embodiment, the three feeding claws 222 grip three heat elements 100 in a row or column on the pallet mechanism 1 one-to-one along the first direction X or along the second direction Y. Then, the first sliding member 23 drives the base 221 to move, thereby driving the three feeding claws 222 to move to the transfer area. Specifically, the feeding gripper 222 is a gripper cylinder.

[0070] Optionally, the gripping assembly 22 further includes a first driving unit 223, which drives the base 221 to rotate about a vertical axis Z. The first sliding member 23 is configured to drive the first driving unit 223 to move along a first direction X, a second direction Y, or the vertical direction Z; the first direction X and the second direction Y are located in a horizontal plane. In this embodiment, when the three loading jaws 222 grip the heating element 100 along the first direction X, the first driving unit 223 needs to drive the base 221 to rotate 90°, thereby causing the three loading jaws 222 located in the transfer area to be positioned along the second direction Y. Specifically, the first driving unit 223 is a rotary cylinder.

[0071] Optionally, the first sliding member 23 includes a first sliding part 231, a second sliding part 232, and a third sliding part 233. The first sliding part 231 is disposed on the first bracket 21. The first sliding part 231 drives the second sliding part 232 to slide along the second direction Y. The second sliding part 232 drives the third sliding part 233 to slide along the first direction X. The third sliding part 233 drives the base 221 to slide along the vertical direction Z. Specifically, the first sliding part 231, the second sliding part 232, and the third sliding part 233 can be a telescopic cylinder, a linear motor 3121, or a lead screw and nut structure, etc.

[0072] Optionally, the feeding grippers 222 include, in sequence, a first feeding gripper 222a, a second feeding gripper 222b, and a third feeding gripper 222c. The first feeding gripper 222a is fixedly connected to the base 221, and the second feeding gripper 222b and the third feeding gripper 222c are slidably engaged with the base 221. The gripping assembly 22 also includes an adjusting component, which includes a cylinder 224, a connecting rod 225, and a drive pin 226. One end of the connecting rod 225 is fixedly connected to the second feeding gripper 222b, and the other end of the connecting rod 225 is provided with a first waist-shaped hole 2251 along the sliding direction of the third feeding gripper 222c. The drive pin 226 passes through the first waist-shaped hole 2251 and is fixedly mounted on the third feeding gripper 222c. The cylinder 224 drives the second feeding gripper 222b or the third feeding gripper 222c to slide relative to the base 221. In this embodiment, since the distance between two adjacent heating elements 100 on the tray mechanism 1 is less than the minimum distance between two adjacent rotating grippers 32 on the transfer mechanism 3, when the loading gripper 222 grips the heating element 100 on the tray mechanism 1, the distance between two adjacent loading grippers 222 is less than the distance between two adjacent loading grippers 222 located in the transfer area. To achieve this function, the cylinder 224 drives the third loading gripper 222c to move closer to the first loading gripper 222a. When the drive pin 226 in the first waist-shaped hole 2251 abuts against the end of the first waist-shaped hole 2251 near the first loading gripper 222a, the distance between the second loading gripper 222b and the third loading gripper 222c is at its minimum. With the spacing fixed to each other, cylinder 224 continues to drive the third loading gripper 222c to move. At this time, the second loading gripper 222b and the third loading gripper 222c synchronously approach the first loading gripper 222a until the distance between the first loading gripper 222a and the second loading gripper 222b is equal to the distance between the third loading gripper 222c and the second loading gripper 222b. At this time, cylinder 224 stops working. The distance between the first loading gripper 222a and the second loading gripper 222b and the distance between the third loading gripper 222c and the second loading gripper 222b are all equal to the distance between two adjacent heating elements 100 on the tray mechanism 1. Therefore, the three loading grippers 222 can simultaneously grip three adjacent heating elements 100 on the tray.

[0073] When the three feeding jaws 222 are in the transfer area, the cylinder 224 drives the third feeding jaw 222c to move away from the first feeding jaw 222a. When the drive pin 226 in the first oblong hole 2251 abuts against the end of the first oblong hole 2251 away from the first feeding jaw 222a, the distance between the second feeding jaw 222b and the third feeding jaw 222c is at its maximum and fixed to each other. The cylinder 224 continues to drive the third feeding jaw 222c to move. At this time, the second feeding jaw 222b and the third feeding jaw 222c move synchronously towards the first feeding jaw 222a. As the feeding jaw 222a moves away, until the distance between the first feeding jaw 222a and the second feeding jaw 222b is equal to the distance between the third feeding jaw 222c and the second feeding jaw 222b, the cylinder 224 stops working. The distance between the first feeding jaw 222a and the second feeding jaw 222b and the distance between the third feeding jaw 222c and the second feeding jaw 222b are all equal to the minimum distance between two adjacent rotating jaws 32 on the rotating mechanism 3. Therefore, the three rotating jaws 32 can simultaneously grip the heating element 100 on the three feeding jaws 222.

[0074] In other embodiments, the first feeding jaw 222a, the second feeding jaw 222b, and the third feeding jaw 222c are slidably engaged with the base 221; the adjusting member can adjust the positions of the first feeding jaw 222a, the second feeding jaw 222b, and the third feeding jaw 222c on the base 221, thereby adjusting the distance between the first feeding jaw 222a and the second feeding jaw 222b, and the distance between the second feeding jaw 222b and the third feeding jaw 222c.

[0075] Optionally, when the three feeding grippers 222 are located in the transfer area, the three feeding grippers 222 are positioned one above each of the three transfer grippers 32.

[0076] like Figures 7-9 As shown, optionally, the adjuster 31 includes a support 311 and an adjusting assembly. The rotating gripper 32 includes a first rotating gripper 32a, a second rotating gripper 32b, and a third rotating gripper 32c. The second rotating gripper 32b is fixed to the support 311. The first rotating gripper 32a and the third rotating gripper 32c are respectively disposed on both sides of the second rotating gripper 32b along the second direction Y and respectively slide in cooperation with the support 311 along the second direction Y. The adjuster 31 drives the first rotating gripper 32a and the third rotating gripper 32c to slide relative to the support 311. In this embodiment, the adjuster 31 drives the first rotating gripper 32a and the third rotating gripper 32c to slide relative to the support 311, thereby adjusting the distance between the first rotating gripper 32a and the second rotating gripper 32b, as well as the distance between the third rotating gripper 32c and the second rotating gripper 32b.

[0077] Optionally, the adjustment assembly includes a motor 3121, a drive pulley 3122, a driven pulley 3123, and a timing belt 3124. The drive pulley 3122 and the driven pulley 3123 are spaced apart on the support 311 along the second direction Y. The timing belt 3124 is sleeved on the drive pulley 3122 and the driven pulley 3123. Along the vertical direction Z, the timing belt 3124 is divided into an upper belt 3125 and a lower belt 3126. The first rotating gripper 32a is fixedly connected to the upper belt 3125, and the third rotating gripper 32c is fixedly connected to the lower belt 3126. The first rotating gripper 32a and the third rotating gripper 32c are equidistant from the second rotating gripper 32b. In this embodiment, the motor 3121 drives the drive wheel 3122 to rotate, thereby causing the synchronous belt 3124 to move. At this time, the upper belt 3125 and the lower belt 3126 move in opposite directions along the second direction Y. When the first rotating jaw 32a is fixed to the upper belt 3125 and the third rotating jaw 32c is fixed to the lower belt 3126, the first rotating jaw 32a and the third rotating jaw 32c can synchronously move closer to or away from the second rotating jaw 32b.

[0078] Optionally, the rotating gripper 32 may include a support frame 321, a second drive unit 322, and a clamping unit 323. The clamping unit 323 is used to clamp the heat element 100 on the corresponding first loading gripper 222. The second drive unit 322 is disposed on the support frame 321 and is configured to drive the clamping unit 323 to rotate around the rotation axis in the first direction X, so as to send the heat element 100 on the clamping unit 323 to the clamping area. The assembly assembly 42 includes an assembly gripper 423, which is used to clamp the heat element 100 in the clamping area. In this embodiment, one end of the support frame 321 is slidably engaged with the support 311 along the second direction Y, and the other end of the support frame 321 is provided with a clamping part 323 so that the clamping part 323 rotates relative to the support frame 321 around the rotation axis of the first direction X. The second driving member 4245 is a rotary cylinder, and the rotary cylinder is connected to the rotation axis of the clamping part 323 through a belt 324, so that the clamping part 323 can rotate 90° so that the heating element 100 is delivered to the clamping area.

[0079] Optionally, taking the first rotating gripper 32a as an example, a fixing plate 3211 is provided on the support frame 321 of the first rotating gripper 32a. The fixing plate 3211 is located above the upper belt 3125, and the pressure plate 3212 is located below the upper belt 3125. The pressure plate 3212 and the fixing plate 3211 are fixedly connected to each other and clamp the upper belt 3125, thereby achieving relative fixation between the support frame 321 of the first rotating gripper 32a and the upper belt 3125. Optionally, the surfaces of the fixing plate 3211 and the upper belt 3125 facing each other and / or the surfaces of the pressure plate 3212 and the upper belt 3125 facing each other are set as serrated surfaces. This setting can improve the stability of the relative fixation between the support frame 321 and the upper belt 3125. The fixing method of the third rotating gripper 32c and the lower belt 3126 is the same as the fixing method of the first rotating gripper 32a and the upper belt 3125, and will not be described again here.

[0080] Optionally, the clamping part 323 includes a first clamping part 3231 and a second clamping part 3232. The first clamping part 3231 is used to clamp the second conductive plate 102, and the second clamping part 3232 is used to clamp the conductive rod 104. In this embodiment, since the rotating jaw 32 needs to rotate 90° so that the assembly jaw 423 can clamp the third conductive plate 103 in the clamping area, but the conductive rod 104 is flexibly connected to the resistance wire 105, the shape and position of the conductive rod 104 are easily damaged when the rotating jaw 32 rotates. Therefore, the first clamping part 3231 is needed to clamp the second conductive plate 102, and the second clamping part 3232 is needed to clamp the conductive rod 104 to achieve clamping of the thermal element 100. Specifically, the first clamping part 3231 and the second clamping part 3232 are driven synchronously by a clamping cylinder 224.

[0081] like Figures 10-12 As shown, optionally, the assembly assembly 42 further includes a second bracket 421 and a second sliding member 422. The second sliding member 422 is configured to drive the assembly gripper 423 to slide along a first direction X, a second direction Y, or a vertical direction Z. In this embodiment, the second bracket 421 is disposed on the side of the conveying assembly 41 away from the transfer mechanism 3, and the second sliding member 422 is disposed on the second bracket 421. The second sliding member 422 drives the assembly gripper 423 to move. The structure of the second sliding member 422 is the same as that of the first sliding member 23, and will not be described again here.

[0082] Optionally, the assembly gripper 423 includes a third clamping part 4231 and an auxiliary pressing block 4232. The auxiliary pressing block 4232 is fixed to the third clamping part 4231. The third clamping part 4231 is used to clamp the third conductive plate 103, and the auxiliary pressing block 4232 is used to abut against the first conductive plate 101. In this embodiment, while the auxiliary pressing block 4232 abuts against the first conductive plate 101, the auxiliary pressing block 4232 also abuts against the bimetallic strip 106. When the second sliding member 422 drives the third clamping part 4231 to move in the direction of vertical Z into the mounting groove 431 of the carrier 43, in order to prevent the third conductive plate 103 from sliding relative to the third clamping part 4231 in the vertical direction Z, and to prevent the first conductive plate 101 from deforming relative to the third conductive plate 103, the auxiliary pressing block 4232 abuts against the first conductive plate 101. Then, the first conductive plate 101 is pressed into the mounting groove 431 by the auxiliary pressing plate 3212. The abutment between the auxiliary pressing block 4232 and the bimetallic strip 106 can maintain the posture of the heat element 100 and prevent the heat element 100 from changing its posture relative to the mounting groove 431 when it is assembled into the mounting groove 431.

[0083] Optionally, the conveying assembly 41 includes a conveyor belt 411, and the carrier 43 is disposed on the conveyor belt 411; the assembly assembly 42 further includes a lifter, which is used to position the carrier 43 below the assembly assembly 42 into a first position and a second position. In the first position, the carrier 43 is located on the conveyor belt 411, and in the second position, the carrier 43 is spaced apart from the conveyor belt 411. In this embodiment, when the carrier 43 is conveyed by the conveyor belt 411 to the area below the second sliding member 422, the lifter lifts the carrier 43 to the second position, where the carrier 43 is spaced apart from the conveyor belt 411, thereby enabling the carrier 43 to be positioned in the horizontal plane, so as to facilitate the assembly gripper 423 to assemble the heat element 100 into the mounting slot 431 of the carrier 43. After the heat element 100 is assembled into multiple mounting slots 431 of the carrier 43, the lifter returns the carrier 43 to the first position, at which point the conveyor belt 411 transports the carrier 43, which is fully equipped with the heat element 100, away from the assembly assembly 42.

[0084] Optionally, the carrier 43 is provided with lifting ears 432 on both sides along the first direction X, and the two lifting ears 432 extend out of the conveyor belt 411 along the first direction X. The lifter includes a first driving member 4241, a first synchronization plate 4242 and two support plates 4243. The two support plates 4243 are arranged on both sides of the conveyor belt 411 along the first direction X. The first driving member 4241 simultaneously drives the two support plates 4243 to move along the vertical direction Z. The carrier 43 is located above the first driving member 4241, and the two support plates 4243 are respectively opposite to the two lifting ears 432. In this embodiment, the first synchronization plate 4242 is located below the conveyor belt 411 and is fixedly connected to the two support plates 4243 respectively. The first driving member 4241 drives the first synchronization plate 4242 to move so that the two support plates 4243 move synchronously in the vertical direction Z. When the carrier 43 is above the first driving member 4241, the first driving member 4241 drives the two support plates 4243 to move, and then drives the two lifting ears 432 to move so that the carrier 43 is in the second position.

[0085] Optionally, one lifting lug 432 is provided with a circular hole 4321, and the other lifting lug 432 is provided with a second oblong hole 4322. The length direction of the second oblong hole 4322 is along the first direction X. Limiting pins are respectively provided on the surfaces of the two support plates 4243 opposite to the two lifting lugs 432. The two support plates 4243 abut against the two lifting lugs 432 respectively, so that the two limiting pins are respectively inserted into the circular hole 4321 and the second oblong hole 4322. In this embodiment, the two limiting pins are respectively inserted into the circular hole 4321 and the second oblong hole 4322, which can further improve the accuracy and stability of limiting the carrier 43. The purpose of providing a circular hole 4321 on one support plate 4243 and a second oblong hole 4322 on the other is to prevent over-positioning and avoid the problem of the two limiting pins failing to limit the position.

[0086] Optionally, the lifter also includes a second drive member 4245, a second synchronization plate 4246, and two front limit plates 4247. The two front limit plates 4247 are disposed on both sides of the conveyor belt 411 along the first direction X, and along the second direction Y, the front limit plates 4247 are located downstream of the support plate 4243. The second drive member 4245 simultaneously drives one end of the two front limit plates 4247 to be higher than the conveyor belt 411 along the vertical direction Z. The two front limit plates 4247 respectively abut against one side of the two lifting ears 432. In this embodiment, the second synchronization plate 4246 is disposed below the conveyor belt 411, and the other ends of the two front limit plates 4247 are respectively fixed to the second synchronization plate 4246. The second driving member 4245 drives the second synchronization plate 4246 to move in the vertical direction Z, so that when one end of the two front limit plates 4247 is higher than the conveyor belt 411 in the vertical direction Z, the two front limit plates 4247 prevent the carrier 43 from continuing to move in the conveying direction of the conveyor belt 411. At the same time, the two support plates 4243 are exactly opposite to the two lifting ears 432 in the vertical direction Z. Then the first driving member 4241 drives the two support plates 4243 to switch the carrier 43 to the second position.

[0087] Optionally, the lifter also includes a third drive member 4248, a third synchronization plate 4249, and a rear limit plate 4250. The rear limit plate 4250 is disposed on both sides of the conveyor belt 411 along the first direction X, and along the second direction Y, the rear limit plate 4250 is located upstream of the support plate 4243. The third drive member 4248 drives one end of the rear limit plate 4250 to be higher than the conveyor belt 411 along the vertical direction Z, and the rear limit plate 4250 abuts against the other side of the corresponding lifting ear 432. In this embodiment, the third synchronization plate 4249 is disposed below the conveyor belt 411, and the other end of the rear limiting plate 4250 is fixedly connected to the third synchronization plate 4249. The third driving member 4248 drives the third synchronization plate 4249 to move in the vertical direction Z, so that when one end of the rear limiting plate 4250 is higher than the conveyor belt 411 in the vertical direction Z, the rear limiting plate 4250 and the front limiting plate 4247 restrict the carrier 43 from moving in the horizontal plane. At the same time, the two support plates 4243 are exactly opposite to the two lifting ears 432 in the vertical direction Z. Then, the first driving member 4241 drives the two support plates 4243 to switch the carrier 43 to the second position.

[0088] Optionally, one or two rear limit plates 4250 can be provided.

[0089] Preferably, the first driving member 4241, the second driving member 4245 and the third driving member 4248 are all cylinders 224.

[0090] Specifically, the lifting unit's workflow includes:

[0091] S10: The second drive unit 4245 operates, thereby extending the two front limit plates 4247 to a height higher than the conveyor belt 411;

[0092] S20: When one side of the two lifting ears 432 of the carrier 43 abuts against the two front limit plates 4247 along the conveying direction of the conveyor belt 411, the third drive member 4248 works, thereby extending the rear limit plate 4250 above the height of the conveyor belt 411, so that the other side of the lifting ears 432 of the carrier 43 abuts against the rear limit plate 4250 along the second direction Y.

[0093] S30: The first driving component 4241 works, driving the two support plates 4243 to switch the vehicle 43 to the second position;

[0094] S40: When the mounting slots 431 on the carrier 43 are all equipped with heating elements 100, the second drive member 4245 and the third drive member 4248 drive the front limit plate 4247 and the rear limit plate 4250 to retract below the conveyor belt 411.

[0095] S50: The first drive unit 4241 drives the two support plates 4243 to switch the vehicle 43 to the first position.

[0096] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. Assembly equipment for thermal relays, characterized in that, The thermal relay includes at least three thermal elements (100), and the assembly equipment for the thermal relay includes a tray mechanism (1), a feeding mechanism (2), a transfer mechanism (3), and an assembly mechanism (4). The transfer mechanism (3) includes an adjuster (31) and at least three transfer grippers (32). The assembly mechanism (4) includes a conveying component (41), at least three assembly components (42), and at least three carriers (43). The at least three thermal elements (100), at least three transfer grippers (32), at least three assembly components (42), and at least three carriers (43) correspond one-to-one. The carrier (43) is provided with an installation slot (431). A tray mechanism (1) is used to place the heating element (100); The loading mechanism (2) is used to transfer the heating element (100) on the tray mechanism (1) to the transfer area; A transfer mechanism (3) is provided in the transfer area. The adjuster (31) is used to adjust the distance between the transfer grippers (32) to match the distance between the heat elements (100) transferred to the transfer area. The transfer grippers (32) are configured to grip the heat elements (100) after the distance is matched. The adjuster (31) is also used to adjust the distance between adjacent transfer grippers (32) to match the distance between the assembly components (42) of the adjacent assembly mechanism (4). The conveying assembly is used to drive the carrier (43) to move, and the assembly assembly (42) is configured to grip the thermal element (100) on the corresponding rotating jaw (32) and insert the thermal element (100) on the assembly assembly (42) into the mounting slot (431) of the corresponding carrier (43).

2. The assembly equipment for the thermal relay according to claim 1, characterized in that, The thermal element (100) includes a first conductive plate (101); The feeding mechanism (2) includes a gripping component (22) and a first sliding member (23). The gripping component (22) includes a base (221) and at least three feeding claws (222). The at least three feeding claws (222) are disposed on the base (221). The at least three feeding claws (222) correspond one-to-one with the at least three transfer claws (32). The feeding claws (222) grip the first conductive plate (101) of the thermal element (100) on the tray mechanism (1). The first sliding member (23) is configured to drive the base (221) to move so that the feeding claws (222) deliver the gripped thermal element (100) to the transfer area.

3. The assembly equipment for the thermal relay according to claim 2, characterized in that, At least three of the aforementioned rotating grippers (32) are arranged in sequence, and at least three of the aforementioned loading grippers (222) are arranged in sequence on the base (221); The gripping component (22) further includes a first driving unit (223), which drives the base (221) to rotate so that the arrangement direction of the loading gripper (222) located in the transfer area is consistent with the arrangement direction of the transfer gripper (32).

4. The assembly equipment for the thermal relay according to claim 3, characterized in that, At least three of the feeding grippers (222) are arranged in sequence along the direction of arrangement, including a first feeding gripper (222a), a second feeding gripper (222b) and a third feeding gripper (222c); The gripping assembly (22) further includes an adjusting member, which is used to adjust the distance between the second feeding gripper (222b) and the third feeding gripper (222c) and the first feeding gripper (222a), respectively; Alternatively, the adjusting member is used to adjust the spacing between two adjacent pairs of the first feeding jaw (222a), the second feeding jaw (222b), and the third feeding jaw (222c).

5. The assembly equipment for the thermal relay according to claim 4, characterized in that, The first feeding claw (222a) is fixedly connected to the base (221), and the second feeding claw (222b) and the third feeding claw (222c) are respectively slidably engaged with the base (221); The adjusting component includes a cylinder (224), a connecting rod (225), and a drive pin (226). One end of the connecting rod (225) is fixedly connected to the second feeding jaw (222b), and the other end of the connecting rod (225) is provided with a first waist-shaped hole (2251) along the sliding direction of the third feeding jaw (222c). The drive pin (226) passes through the first waist-shaped hole (2251) and is fixedly mounted on the third feeding jaw (222c). The cylinder (224) drives the second feeding jaw (222b) or the third feeding jaw (222c) to slide relative to the base (221).

6. The assembly equipment for the thermal relay according to any one of claims 1-4, characterized in that, The adjuster (31) includes a support (311) and an adjusting component. At least three rotating jaws (32) include a first rotating jaw (32a), a second rotating jaw (32b), and a third rotating jaw (32c) arranged in sequence. The second rotating jaw (32b) is fixed to the support (311). The first rotating jaw (32a) and the third rotating jaw (32c) are slidably engaged with the support (311). The adjusting component drives the first rotating jaw (32a) and the third rotating jaw (32c) to slide relative to the support (311).

7. The assembly equipment for the thermal relay according to claim 6, characterized in that, The adjustment assembly includes a timing belt (3124), which includes an upper belt (3125) and a lower belt (3126). The first rotating jaw (32a) is fixedly connected to the upper belt (3125), and the third rotating jaw (32c) is fixedly connected to the lower belt (3126).

8. The assembly equipment for the thermal relay according to claim 4, characterized in that, The thermal element (100) further includes a second conductive plate (102) and a third conductive plate (103); The rotating gripper (32) includes a support frame (321), a second drive unit (322), and a first clamping unit (3231). The first clamping unit (3231) is used to clamp the second conductive plate (102) of the thermal element (100) on the corresponding first loading gripper (222). The second drive unit (322) is disposed on the support frame (321) and is configured to drive the first clamping unit (3231) to rotate so as to send the thermal element (100) on the first clamping unit (3231) to the clamping area. The assembly assembly (42) includes an assembly gripper (423) for holding the third conductive plate (103) of the thermal element (100) in the clamping region.

9. The assembly equipment for the thermal relay according to claim 8, characterized in that, The thermal element (100) also includes a conductive rod (104); The rotating gripper (32) further includes a second clamping part (3232), the first clamping part (3231) and the second clamping part (3232) are fixedly connected to each other, and the second clamping part (3232) is used to clamp the conductive rod (104).

10. The assembly equipment for the thermal relay according to claim 8, characterized in that, The assembly assembly (42) further includes a second sliding member (422) configured to drive the assembly gripper (423) to move so as to insert the first conductive plate (101) of the thermal element (100) on the assembly gripper (423) into the mounting slot (431) of the corresponding carrier (43).

11. The assembly equipment for the thermal relay according to claim 10, characterized in that, The assembly gripper (423) includes a third clamping part (4231) and an auxiliary pressing block (4232). The auxiliary pressing block (4232) is fixed to the third clamping part (4231). The third clamping part (4231) is used to clamp the third conductive plate (103) of the thermal element (100) on the rotating gripper (32). The auxiliary pressing block (4232) is used to abut against the first conductive plate (101). The second sliding member (422) drives the auxiliary pressing block (4232) to press the first conductive plate (101) into the mounting groove (431) of the carrier (43).

12. The assembly equipment for the thermal relay according to claim 10, characterized in that, The conveying assembly (41) includes a conveyor belt (411) located below the second sliding member (422), and the conveyor belt (411) drives at least three of the vehicles (43) to move synchronously. The assembly assembly (42) further includes a lifter for positioning the carrier (43) corresponding to the assembly gripper (423) in a first position and a second position, wherein in the first position the carrier (43) is located on the conveyor belt (411) and in the second position the carrier (43) is spaced apart from the conveyor belt (411).

13. The assembly equipment for the thermal relay according to claim 12, characterized in that, The carrier (43) is provided with lifting ears (432) on both sides respectively, and the two lifting ears (432) extend out of the conveyor belt (411); The lifter includes a first drive member (4241) and two support plates (4243). The two support plates (4243) are disposed on both sides of the conveyor belt (411). The two support plates (4243) are respectively opposite to the two lifting ears (432) in the vertical direction (Z). The first drive member (4241) simultaneously drives the two support plates (4243) to move in the vertical direction (Z) so that the vehicle (43) switches between the first position and the second position.

14. The assembly equipment for the thermal relay according to claim 13, characterized in that, One of the lifting ears (432) is provided with a round hole (4321), and the other lifting ear (432) is provided with a second waist-shaped hole (4322). The length direction of the second waist-shaped hole (4322) is consistent with the spacing direction of the two support plates (4243). The two support plates (4243) are respectively provided with limit pins. The two support plates (4243) abut against the two lifting ears (432) respectively, so that the two limit pins are respectively inserted into the round hole (4321) and the second waist-shaped hole (4322).

15. The assembly equipment for the thermal relay according to claim 13, characterized in that, The lifter also includes a second drive member (4245) and two front limit plates (4247). The two front limit plates (4247) are disposed on both sides of the conveyor belt (411). The second drive member (4245) simultaneously drives the two front limit plates (4247) to move along the vertical direction (Z). One end of the two front limit plates (4247) is higher than the conveyor belt (411) along the vertical direction (Z), so that the two front limit plates (4247) respectively abut against one side of the two lifting ears (432) along the moving direction of the vehicle (43). And / or, the lifter further includes a third drive (4248) and a rear limit plate (4250), the third drive (4248) driving the rear limit plate (4250) to move along the vertical direction (Z), one end of the rear limit plate (4250) being higher than the conveyor belt (411) along the vertical direction (Z), so that the rear limit plate (4250) abuts against the lifting lug (432) on the other side of the conveying direction of the carrier (43).

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