An electromagnetic starter

Abstract

This utility model belongs to the field of low-voltage electrical technology and discloses an electromagnetic starter, including a housing assembly, a stop operation button, a thermal relay, and a button assembly. The housing assembly has an installation space; the stop operation button is located on the housing assembly and is used to accept operation to stop the electromagnetic starter; the thermal relay is located in the installation space and has a stop button for stopping the thermal relay and a reset button for resetting the thermal relay; the button assembly is movably located on the housing assembly, with its first end for accepting a pressing operation, and its second end extending into the installation space and having a pushing part that can push against the stop button and the reset button. This electromagnetic starter can reduce the frequency of use of the button assembly for resetting and stopping the thermal relay, optimize the force condition of the button assembly when pressed, and improve the service life of the button assembly and the thermal relay.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to an electromagnetic starter. Background Technology

[0002] An electromagnetic starter is a type of starter composed of an electromagnetic contactor and overload protection components, also known as a magnetic starter. Because it directly applies the mains voltage to the stator windings of the motor, allowing the motor to start at full voltage, it is also called a direct starter. When the motor is overloaded or experiences a phase loss, the normally closed switch of the thermal relay inside the electromagnetic starter opens, disconnecting the control circuit to cut off the main circuit and stop the motor. After the normally closed switch of the thermal relay opens, the electromagnetic starter can only be used again by pressing the reset button on the thermal relay.

[0003] In existing electromagnetic starters, both the stop button (for stopping the starter) and the reset button (for resetting the thermal relay) are located on the thermal relay. When the starter's stop button needs to be activated, pressing the button simultaneously triggers both the stop and reset buttons. However, the frequency of needing to trigger the reset button to reset the thermal relay is low during the starter's operation. Stopping the starter usually doesn't require triggering the reset button to reset the thermal relay, leading to excessive wear and tear on the button's lifespan. Furthermore, the existing button structure includes a button body and a pressure plate connected to the button body. When force is applied to the button body, the end of the pressure plate furthest from the button body presses against the stop and reset buttons. This eccentric force on the pressure plate after prolonged use can easily cause it to break between itself and the button body, reducing the button structure's lifespan.

[0004] Therefore, there is an urgent need for an electromagnetic starter to solve the aforementioned technical problems in the existing technology. Utility Model Content

[0005] The purpose of this invention is to provide an electromagnetic starter that can reduce the frequency of use of the button structure used to reset the thermal relay, optimize the force condition of the button structure when pressed, and improve the service life of the button structure and the thermal relay.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electromagnetic starter is provided, comprising:

[0008] The housing assembly has an installation space.

[0009] A stop operation button, located on the housing assembly, is used to receive an operation to stop the electromagnetic starter;

[0010] A thermal relay is provided in the installation space, and the thermal relay is provided with a stop key for stopping the thermal relay and a reset key for resetting the thermal relay.

[0011] A button assembly is movably disposed on the housing assembly. A first end of the button assembly is used to receive a pressing operation, and a second end of the button assembly extends into the mounting space and is provided with a pushing part, which is used to push against the stop button and the reset button.

[0012] As a preferred embodiment of the electromagnetic starter provided by this utility model, the pushing part includes a first pressure rod, a second pressure rod, a first pushing plate and a second pushing plate;

[0013] The first pressure rod extends along the moving direction of the button assembly and is connected to the first push plate; both the first pressure rod and the first push plate are positioned directly opposite the second end.

[0014] The second pressure rod is set at an angle to the first pressure rod and is connected to the second push plate;

[0015] One of the first push plate and the second push plate is used to push the stop button, and the other is used to push the reset button.

[0016] As a preferred embodiment of the electromagnetic starter provided by this utility model, a connecting rib is provided between the first push plate and the second push plate;

[0017] There is one connecting rib; or, there are multiple connecting ribs spaced apart; or, there are multiple connecting ribs arranged at intersections.

[0018] As a preferred embodiment of the electromagnetic starter provided by this utility model, a first reinforcing rib is provided on the first pressure rod along its extension direction;

[0019] And / or, the second pressure bar is provided with a second reinforcing rib along its extension direction.

[0020] As a preferred embodiment of the electromagnetic starter provided by this utility model, the housing assembly is provided with mounting holes, and the button assembly includes:

[0021] A button is movably disposed within the mounting hole, and the first end of the button is used to receive a pressing operation;

[0022] The pusher includes a guide portion, a limiting portion, and the pusher portion connected in sequence; the guide portion extends movably into the mounting hole and is connected to the button; the limiting portion is located within the mounting space and is detachably abutted against the inner wall of the mounting space.

[0023] The elastic element has a compression limit located between the button and the bottom wall of the mounting hole.

[0024] As a preferred embodiment of the electromagnetic starter provided by this utility model, the button includes a pressing part and a connecting part connected together; the guiding part is provided with a connecting hole;

[0025] The connecting part passes through the connecting hole, the pressing part is located outside the connecting hole to receive the pressing operation, and the elastic element is sleeved outside the guiding part and abuts against the pressing part;

[0026] One of the connecting part and the guiding part is provided with a buckle structure, and the other is provided with a locking hole, wherein the buckle structure is engaged with the locking hole.

[0027] As a preferred embodiment of the electromagnetic starter provided by this utility model, one of the connecting part and the inner wall of the connecting hole is provided with a rib structure, and the other is provided with a limiting groove structure.

[0028] The rib structure is inserted into the limiting groove structure along the moving direction of the button assembly;

[0029] And / or,

[0030] The inner wall of the connecting hole is provided with a first arc surface and a first plane; the connecting part is provided with a second arc surface and a second plane;

[0031] The first arc surface mates with the second arc surface, and the first plane mates with the second plane;

[0032] And / or,

[0033] The pusher also includes a first sealing ring, and the button is provided with a first mounting groove, with the first sealing ring disposed in the first mounting groove; the first sealing ring is in sealing contact with both the inner wall of the first mounting groove and the inner wall of the mounting hole.

[0034] As a preferred embodiment of the electromagnetic starter provided by this utility model, the rib structure includes a first limiting rib and a second limiting rib; the limiting groove structure includes a first limiting groove and a second limiting groove;

[0035] The first limiting rib engages with the first limiting groove, and the second limiting rib engages with the second limiting groove;

[0036] The first limiting rib and the second limiting rib have different shapes and / or sizes; the first limiting groove and the second limiting groove have different shapes and / or sizes.

[0037] As a preferred embodiment of the electromagnetic starter provided by this utility model, the housing assembly includes an upper housing, a base, fasteners, and wiring pieces;

[0038] The upper shell and the base are interlocked to form the installation space. One end of the connector is connected to the base, and the fastener passes through the upper shell and is connected to the other end of the connector.

[0039] As a preferred embodiment of the electromagnetic starter provided by this utility model, the housing assembly further includes a second sealing ring; the upper housing is provided with a snap-fit ​​groove along the circumferential direction, the edge of the base is inserted into the snap-fit ​​groove, the second sealing ring is provided in the snap-fit ​​groove, and is in sealing contact with the inner wall of the snap-fit ​​groove and the base.

[0040] And / or, a third sealing ring is provided between the fastener and the upper shell;

[0041] And / or, the base is provided with a positioning part, the wiring piece is provided with a positioning hole, and the positioning part passes through the positioning hole;

[0042] And / or, the base is provided with a knock-off plate, the knock-off plate is configured to receive an external force to detach from the base, and a wiring hole is formed on the base, the wiring pieces being spaced apart on one side of the knock-off plate.

[0043] The beneficial effects of this utility model are:

[0044] This invention provides an electromagnetic starter. A button assembly on the housing allows for simultaneous activation of a stop and reset button on a thermal relay upon pressing, thus resetting and stopping the thermal relay. The stopping of the thermal relay, in turn, stops the electromagnetic starter. A stop button on the housing also stops the electromagnetic starter. Therefore, when only stopping the electromagnetic starter is required, only the stop button needs to be operated, eliminating the need to press the button assembly to trigger the stop and reset buttons on the thermal relay. This reduces the frequency of button assembly usage and thermal relay reset / stop operations, thus minimizing the lifespan of both the button assembly and the thermal relay.

[0045] In addition, since the push part at the second end of the button assembly can push the stop button and the reset button, the button assembly can reduce the off-center load on the push part when it is pressed, optimize the force condition on the push part when the button structure is pressed, and avoid problems such as breakage, misalignment and damage caused by the push part being subjected to eccentric pushing force for a long time, thus effectively improving the service life and pressing reliability of the button assembly. Attached Figure Description

[0046] Figure 1 This is an isometric view of the electromagnetic starter provided in a specific embodiment of this utility model;

[0047] Figure 2This is a cross-sectional view of the electromagnetic starter provided in a specific embodiment of this utility model;

[0048] Figure 3 This is a schematic diagram showing the interaction between the button assembly of the electromagnetic starter and the stop and reset buttons of the thermal relay provided in a specific embodiment of this utility model.

[0049] Figure 4 This is a structural schematic diagram of the button assembly provided in a specific embodiment of the present utility model;

[0050] Figure 5 This is a first cross-sectional view of the button assembly provided in a specific embodiment of this utility model;

[0051] Figure 6 This is a first exploded view of the button assembly provided in a specific embodiment of this utility model;

[0052] Figure 7 This is a second exploded view of the button assembly provided in a specific embodiment of this utility model;

[0053] Figure 8 This is a schematic diagram of the button structure of the button assembly provided in a specific embodiment of this utility model;

[0054] Figure 9 This is a second cross-sectional view of the button assembly provided in a specific embodiment of this utility model;

[0055] Figure 10 This is a cross-sectional view of the first sealing ring of the button assembly provided in a specific embodiment of this utility model;

[0056] Figure 11 This is a schematic diagram of the upper shell structure of the outer shell assembly provided in a specific embodiment of this utility model;

[0057] Figure 12 yes Figure 2 A partial view;

[0058] Figure 13 This is a schematic diagram of the circuit connection between the electromagnetic starter and the electric motor provided in a specific embodiment of this utility model.

[0059] In the picture:

[0060] 1. Housing assembly; 2. Stop operation button; 3. Thermal relay; 4. Button assembly; 5. Start operation button; 6. Contactor;

[0061] 10. Installation space; 11. Upper shell; 12. Base; 13. Fasteners; 14. Connecting piece; 15. Second sealing ring; 16. Third sealing ring;

[0062] 111. Mounting hole; 112. Through-hole; 113. Mounting cylinder; 114. Snap-fit ​​groove; 115. Receiving groove; 116. Countersunk groove; 117. Protruding column structure; 118. Third reinforcing rib;

[0063] 1121. Fourth arc surface; 1122. Fourth plane;

[0064] 121. Positioning part; 122. Knockout plate; 123. Wiring hole; 124. Positioning protrusion;

[0065] 141. Positioning hole;

[0066] 31. Stop button; 32. Reset button;

[0067] 41. Button; 42. Pushing element; 43. Elastic element; 44. First sealing ring;

[0068] 411. Pressing part; 412. Connecting part; 413. Limiting groove structure;

[0069] 4111, First mounting slot;

[0070] 4121. Snap-fit ​​structure; 4122. Second arc surface; 4123. Second plane;

[0071] 41211, Abutting the curved surface;

[0072] 4131, First limiting groove; 4132, Second limiting groove;

[0073] 421. Guide part; 422. Limiting part; 423. Pushing part; 424. Connecting hole; 425. Rib structure;

[0074] 4211, Slot; 4212, Third curved surface; 4213, Third plane;

[0075] 4231. First pressure bar; 4232. Second pressure bar; 4233. First push plate; 4234. Second push plate; 4235. Connecting rib; 4236. Notch; 4237. Recess; 4238. Rounded transition surface;

[0076] 42311, First reinforcing rib; 42321, Second reinforcing rib;

[0077] 4241. First arc surface; 4242. First plane;

[0078] 4251, First limiting reinforcement; 4252, Second limiting reinforcement;

[0079] 441. Matrix; 442. Inner sealing ring; 443. Outer sealing ring;

[0080] 4411, First sealing surface; 4431, Second sealing surface;

[0081] 100. Electric motor; 200. Main thermal relay; 300. Main contactor; 400. Main fuse. Detailed Implementation

[0082] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0083] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0084] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0085] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0086] like Figure 1 , Figure 2 as well as Figure 3As shown, this embodiment provides an electromagnetic starter, including a housing assembly 1, a stop operation button 2, a thermal relay 3, and a button assembly 4. The housing assembly 1 has an installation space 10. The stop operation button 2 is located in the housing assembly 1 and is used to receive an operation to stop the electromagnetic starter. The thermal relay 3 is located within the installation space 10 and has a stop button 31 for stopping the thermal relay and a reset button 32 for resetting the thermal relay 3. The button assembly 4 is movably located in the housing assembly 1. A first end of the button assembly 4 is used to receive a pressing operation, and a second end of the button assembly 4 extends into the installation space 10 and has a pushing part 423. The pushing part 423 is used to push the stop button 31 and the reset button 32. When the button assembly 4 is pressed to push the stop button 31 and the reset button 32 through the pushing part 423, the thermal relay 3 can be stopped and reset, thereby stopping the electromagnetic starter.

[0087] For example, the stop operation button 2 can be an electronic button that can be manually pressed or remotely controlled to stop the electromagnetic starter under the action of a stop command.

[0088] The electromagnetic starter provided in this embodiment, through the button assembly 4 provided on the housing, can push the stop button 31 and reset button 32 on the thermal relay 3 under pressing operation, so that the stop button 31 and reset button 32 are triggered simultaneously, synchronously realizing the reset and stop of the thermal relay 3. The stopping of the thermal relay 3 thereby stops the electromagnetic starter. The electromagnetic starter can be stopped by the stop operation button 2 provided on the housing. Therefore, when it is only necessary to stop the electromagnetic starter, only the stop operation button 2 needs to be operated, without pressing the button assembly 4 to trigger the stop button 31 and reset button 32 on the thermal relay 3. This reduces the frequency of use of the button assembly 4 and the frequency of resetting and stopping the thermal relay 3, and reduces the wear and tear on the button assembly 4 and the thermal relay 3.

[0089] In this embodiment, the pushing part 423 is at least partially positioned directly opposite one of the second end, the stop button 31, and the reset button 32 in the moving direction of the button assembly 4. This ensures that when the button assembly 4 is pressed, the pushing part 423 can directly push against either the stop button 31 or the reset button 32, reducing the off-center load on the pushing part 423, optimizing the force distribution on the pushing part 423 when the button is pressed, and preventing problems such as breakage, misalignment, and damage caused by prolonged eccentric pushing force on the pushing part 423. This effectively improves the service life and pressing reliability of the button assembly 4.

[0090] Furthermore, the electromagnetic starter also includes a start operation button 5 and a contactor 6. The start operation button 5 is used to accept operations to start the electromagnetic starter. For example, the start operation button 5 can be an electronic button, which can accept manual pressing and also realize remote control, starting the electromagnetic starter under the action of a start command. The contactor 6 is disposed in the installation space 10 and is electrically connected to the thermal contactor 3. At the same time, a mechanical connection structure is also provided between the contactor 6 and the thermal relay 3 for fixing the connection between the contactor 6 and the thermal relay 3. Optionally, the mechanical connection structure can be a mutually mating plate and slot, or a mutually mating hook and slot, etc., which is not limited here.

[0091] It is understandable that the direction of movement of button component 4 is the same as its pressing direction, specifically... Figure 3 and Figure 5 The direction shown is a. When a force is applied along direction a, the button assembly 4 can move along direction a, so that the push part 423 simultaneously triggers the stop button 31 and the reset button 32 along direction a. See also Figure 3 The push part 423 and the reset button 32 are positioned opposite each other along the moving direction (direction a) of the button assembly 4.

[0092] like Figure 4 and Figure 5 As shown, the push part 423 includes a first pressure rod 4231, a second pressure rod 4232, a first push plate 4233, and a second push plate 4234. The first pressure rod 4231 extends along the moving direction of the button assembly 4 and is connected to the first push plate 4233; both the first pressure rod 4231 and the first push plate 4233 are directly opposite the second end of the button assembly 4; the second pressure rod 4232 is angled to the first pressure rod 4231 and is connected to the second push plate 4234. One of the first push plate 4233 and the second push plate 4234 is used to push the stop button 31, and the other is used to push the reset button 32. Exemplarily, combined with... Figure 3 The first push plate 4233 is used to push the reset button 32, and the second push plate 4234 is used to push the stop button 31.

[0093] By setting the first pressure rod 4231 to extend along the moving direction of the button assembly 4, the first pressure rod 4231 and the first push plate 4233 can be directly aligned with the reset button 32. When the reset button 32 is triggered by pushing, the pushing force on the first pressure rod 4231 is along its own extension direction, with almost no off-center torque, thus optimizing the overall force distribution. The second pressure rod 4232 is set to be inclined relative to the first pressure rod 4231, that is, the second pressure rod 4232 is set at an angle to the direction a, so as to extend to the position of the stop button 31 on the side of the reset button 32. In addition, by pressing the stop button 31 and the reset button 32 with the first push plate 4233 and the second push plate 4234, the contact area with the stop button 31 and the reset button 32 can be effectively guaranteed, improving the stability and reliability of the pressing operation.

[0094] Furthermore, such as Figure 4 As shown, a connecting rib 4235 is provided between the first push plate 4233 and the second push plate 4234. The connecting rib 4235 improves the connection strength between the first push plate 4233 and the second push plate 4234, preventing the second pressure rod 4232 from moving away from the first pressure rod 4231. Simultaneously, the first pressure rod 4231, the second pressure rod 4232, the first push plate 4233, the second push plate 4234, and the connecting rib 4235 form a triangular structure, which enhances the strength and deformation resistance of the entire push part 423.

[0095] For example, a connecting rib 4235 may be provided, which can be connected between the first push plate 4233 and the second push plate 4234.

[0096] In some embodiments, multiple connecting ribs 4235 may be provided at intervals, with gaps between the multiple connecting ribs 4235, and their two ends are respectively connected to the first push plate 4233 and the second push plate 4234.

[0097] In other embodiments, multiple connecting ribs 4235 may be arranged in a crisscross pattern. For example... Figure 4 As shown, the two connecting ribs 4235 are arranged in a cross shape, and their two ends are connected to the first push plate 4233 and the second push plate 4234 respectively, effectively improving the connection strength between the first push plate 4233 and the second push plate 4234. A notch 4237 is formed between the cross-shaped connecting ribs 4235, and a notch 4236 is formed at the connection position with the two push plates, so that the first push plate 4233, the second push plate 4234, and the two connecting ribs 4235 between them form a hollow structure. This saves material and reduces costs while ensuring strength and resistance to deformation.

[0098] Furthermore, an arc transition surface 4238 is provided at the bottom wall of the notch 4237 to ensure the connection strength at the cross intersection between the two connecting ribs 4235 and to prevent breakage at this location.

[0099] Optionally, such as Figure 4 As shown, a first reinforcing rib 42311 is provided on the first pressure rod 4231 along its extension direction to improve the strength and deformation resistance of the first pressure rod 4231. And / or, a second reinforcing rib 42321 is provided on the second pressure rod 4232 along its extension direction to improve the strength and deformation resistance of the second pressure rod 4232, thereby increasing the service life of the entire button assembly 4.

[0100] In this embodiment, the cross-sections of both the first pressure bar 4231 and the second pressure bar 4232 are cross-shaped, which ensures strength and saves material. In other embodiments, the cross-sections of the first pressure bar 4231 and the second pressure bar 4232 can also be any other arbitrary shape.

[0101] like Figure 5 As shown, the housing assembly 1 has mounting holes 111 for mounting the button assembly 4. (Combined with...) Figure 5 , Figure 6 as well as Figure 7 The button assembly 4 provided in this embodiment includes a button 41, a pusher 42, and an elastic member 43. The button 41 is movably disposed within the mounting hole 111, and its first end is used to receive a pressing operation. The pusher 42 includes a guide portion 421, a limiting portion 422, and the aforementioned pusher portion 423 connected in sequence. That is, the end face of the limiting portion 422 facing away from the button 41 is the second end of the button assembly 4. The guide portion 421 movably extends into the mounting hole 111 and connects to the button 41. The limiting portion 422 is located within the mounting space 10 and separably abuts against the inner wall of the mounting space 10. The elastic member 43 is compressed and limited between the button 41 and the bottom wall of the mounting hole 111.

[0102] When button 41 is pressed, button 41 drives the entire push member 42 to move along direction a via guide part 421, so that push part 423 simultaneously triggers stop button 31 and reset button 32. During this process, elastic member 43 is compressed by button 41. When the pressure on button 41 is released, elastic member 43 releases elastic potential energy, causing button 41 to spring back to its original position. Button 41 then drives push member 42 to reset until limit part 422 abuts against the inner wall of mounting space 10, preventing button 41 from dislodging from mounting hole 111. Because elastic member 43 is in a compressed state, limit part 422 can maintain contact with the inner wall of mounting space 10 under the elastic force of elastic member 43.

[0103] For example, the elastic element 43 is a spring, which is disposed in the mounting hole 111 and is telescopic.

[0104] Specifically, such as Figure 5 and Figure 7As shown, button 41 includes a pressing part 411 and a connecting part 412 connected together. A connecting part 421 is provided with a connecting hole 424; the connecting part 412 passes through the connecting hole 424, and the pressing part 411 is located outside the connecting hole 424 to receive pressing operations. An elastic member 43 is sleeved on the outside of the connecting part 421 and abuts against the pressing part 411, so that the elastic member 43 is compressed and limited between the pressing part 411 and the bottom wall of the mounting hole 111. One of the connecting part 412 and the connecting part 421 is provided with a snap-fit ​​structure 4121, and the other is provided with a locking hole 4211. The snap-fit ​​structure 4121 engages with the locking hole 4211, realizing a fixed connection between the connecting part 412 and the connecting part 421, so that when the pressing part 411 is pressed, it drives the entire pushing member 42 through the connecting part 421 to trigger the stop button 31 and the reset button 32. The snap-fit ​​structure 4121 and the locking hole 4211 ensure a secure connection between the button 41 and the pusher 42 while reducing assembly difficulty. In this embodiment, the snap-fit ​​structure 4121 is provided on the connecting part 412, and the locking hole 4211 is provided on the guide part 421.

[0105] See Figure 8 The connecting part 412 includes two cantilever arms spaced apart. One end of each cantilever arm is connected to the pressing part 411, and a latching structure 4121 is provided at the end of the cantilever arm away from the pressing part 411. Specifically, a latching structure 4121 is provided on the side of each cantilever arm facing away from each other. When the two cantilever arms enter the connecting hole 424, the latching structure 4121 slides in contact with the inner wall of the connecting hole 424, and the two cantilever arms deform towards each other under the action of extrusion force. After the latching structure 4121 is engaged in the latching hole 4211, the deformation is restored.

[0106] Furthermore, the snap-fit ​​structure 4121 is provided with an abutting arc surface 41211. When the connecting part 412 enters the connecting hole 424, the snap-fit ​​structure 4121 slides in contact with the inner wall of the connecting hole 424 through the abutting arc surface 41211, which can improve the smoothness of sliding and avoid scratching the inner wall of the connecting part 412, thus successfully realizing the snap-fit ​​structure 4121 and the snap-fit ​​hole 4211.

[0107] like Figure 7 , Figure 8 as well as Figure 9 As shown, a rib structure 425 is provided on one of the inner walls of the connecting part 412 and the connecting hole 424, and a limiting groove structure 413 is provided on the other. The rib structure 425 is inserted into the limiting groove structure 413 along the moving direction of the button assembly 4. The cooperation between the rib structure 425 and the limiting groove structure 413 can position the installation position of the button 41 relative to the guide part 421, improve the stability of the two after fixed connection, and prevent relative shaking after connection.

[0108] Specifically, such as Figure 7 , Figure 8 as well as Figure 9 As shown, the rib structure 425 includes a first limiting rib 4251 and a second limiting rib 4252. The limiting groove structure 413 includes a first limiting groove 4131 and a second limiting groove 4132. The first limiting rib 4251 engages with the first limiting groove 4131, and the second limiting rib 4252 engages with the second limiting groove 4132. The first limiting rib 4251 and the second limiting rib 4252 have different shapes and / or dimensions; the first limiting groove 4131 and the second limiting groove 4132 also have different shapes and / or dimensions. By setting first limiting ribs 4251 and second limiting ribs 4252 with different shapes and / or sizes, and first limiting grooves 4131 and second limiting grooves 4132 with different shapes and / or sizes, the first limiting rib 4251 can only engage with the first limiting groove 4131, and the second limiting rib 4252 can only engage with the second limiting groove 4132, which plays a foolproof role, prevents the button 41 from being installed in the wrong position, and ensures that the button 41 and the pusher 42 are correctly installed in place.

[0109] For example, the cross-section of the first limiting rib 4251 is approximately semi-elliptical, and the cross-section of the second limiting rib 4252 is approximately semi-circular, so that the widths of the first limiting rib 4251 and the second limiting rib 4252 are different. Correspondingly, the widths of the first limiting groove 4131 and the second limiting groove 4132 are different to accommodate the engagement of the corresponding first limiting rib 4251 and the second limiting rib 4252.

[0110] like Figure 7 and Figure 9 As shown, the inner wall of the connecting hole 424 is provided with a first arc surface 4241 and a first flat surface 4242; the connecting part 412 is provided with a second arc surface 4122 and a second flat surface 4123. The first arc surface 4241 and the second arc surface 4122 cooperate, and the first flat surface 4242 and the second flat surface 4123 cooperate, so that the cross-sectional shapes of the connecting part 412 and the connecting hole 424 are adapted to each other, which can improve the stability after insertion. At the same time, the inner wall surface of the connecting hole 424 formed by the first arc surface 4241 and the first flat surface 4242 has an anti-rotation function, preventing the connecting part 412 from rotating circumferentially within the connecting hole 424.

[0111] like Figure 5 , Figure 6 as well as Figure 7 As shown, the pusher 42 also includes a first sealing ring 44. A first mounting groove 4111 is provided around the pressing portion 411 of the button 41, and the first sealing ring 44 is disposed within the first mounting groove 4111 to improve the installation stability of the first sealing ring 44. The first sealing ring 44 makes sealing contact with both the inner wall of the first mounting groove 4111 and the inner wall of the mounting hole 111, improving the sealing performance between the button 41 and the inner wall of the mounting hole 111, and providing better waterproof and dustproof effects.

[0112] Specifically, such as Figure 10 As shown, the first sealing ring 44 includes a base 441 and an inner sealing ring 442 and an outer sealing ring 443 disposed on the base 441. The outer sealing ring 443 is disposed outside the inner sealing ring 442 and forms a certain angle with the inner sealing ring 442, so that the outer sealing ring 443 can deform relative to the inner sealing ring 442 to better fill the sealing gap. The inner wall surface of the inner sealing ring 442 is in sealing contact with the inner wall of the first mounting groove 4111. A first sealing surface 4411 is provided on the base 441. A second sealing surface 4431 is provided on the side of the outer sealing ring 443 facing away from the inner sealing ring 442. The first sealing surface 4411 is in sealing contact with the inner wall of the first mounting groove 4111, and the second sealing surface 4431 is in sealing contact with the inner wall of the mounting hole 111.

[0113] In this embodiment, see Figure 1 and Figure 2 The outer casing assembly 1 includes an upper casing 11 and a base 12. The upper casing 11 and the base 12 interlock to form the aforementioned mounting space 10. The contactor 6 and the thermal relay 3 are both mounted on the base 12, while the stop button 2, the button assembly 4, and the start button 5 are all mounted on the upper casing 11. Figure 2 As shown, multiple positioning protrusions 124 are provided on the inner wall of the base 12 for positioning the installation positions of the contactor 6 and the thermal relay 3.

[0114] See Figure 5 and Figure 11 A mounting hole 111 is provided on the upper shell 11. A mounting cylinder 113 protrudes from the upper shell 11 into the mounting space 10. The internal space of the mounting cylinder 113 defines the mounting hole 111. Further, a through-hole 112 is provided through the bottom wall of the mounting hole 111 for the guide portion 421 of the button assembly 4 to pass through. The inner diameter of the mounting hole 111 is larger than the inner diameter of the through-hole 112, so that a stepped surface is formed between them. This stepped surface is used to abut against the elastic member 43. Further, the limiting portion 422 abuts against the bottom surface of the mounting cylinder 113 under the elastic force of the elastic member 43.

[0115] like Figure 7 and Figure 9 As shown, the outer wall of the guide portion 421 has a third arcuate surface 4212 and a third flat surface 4213. (As...) Figure 11 As shown, the inner wall of the through-hole 112 has a fourth arc surface 1121 and a fourth plane 1122. When the guide part 421 passes through the through-hole 112, the third arc surface 4212 adapts to the fourth arc surface 1121, and the third plane 4213 adapts to the fourth plane 1122, thereby improving the installation stability of the guide part 421 in the mounting hole 111 and preventing the guide part 421 from rotating relative to the mounting hole 111.

[0116] like Figure 2 and Figure 12 As shown, the housing assembly 1 also includes a fastener 13 and a connector 14. After the upper housing 11 is engaged with the base 12, it is fixed by the fastener 13 and the connector 14. One end of the connector 14 is fixedly connected to the base 12, and the fastener 13 passes through the upper housing 11 and connects to the other end of the connector 14, thus fixing the upper housing 11 to the base 12. At the same time, the connector 14 can be installed, which is convenient for the user to connect the wires.

[0117] like Figure 12 As shown, the outer casing assembly 1 also includes a second sealing ring 15. The upper casing 11 has a circumferentially arranged fastening groove 114, and the edge of the base 12 is inserted into the fastening groove 114. The second sealing ring 15 is disposed within the fastening groove 114 and makes sealing contact with both the inner wall of the fastening groove 114 and the base 12. By providing the fastening groove 114 that engages with the edge of the base 12, the connection stability between the upper casing 11 and the base 12 can be improved. By providing the second sealing ring 15, the gap between the inner wall of the fastening groove 114 and the edge of the base 12 can be filled, ensuring the sealing between the upper casing 11 and the base 12.

[0118] like Figure 12 As shown, a third sealing ring 16 is provided between the fastener 13 and the upper shell 11 to improve the sealing performance of the connection between the fastener 13 and the upper shell 11 and prevent water and dust from entering the connection.

[0119] For example, the first sealing ring 44, the second sealing ring 15, and the third sealing ring 16 are all rubber sealing rings.

[0120] See Figure 1 , Figure 11 as well as Figure 12 The upper shell 11 has a recessed receiving groove 115 on its exterior, and a countersunk groove 116 is recessed on the inner wall of the receiving groove 115. A protruding post structure 117 is protruding from the inner wall of the upper shell 11. The fastener 13 is exemplarily a screw, the screw portion of which passes through a hole in the protruding post structure 117 and is threadedly connected to the connecting piece 14. Its stop head is located in the countersunk groove 116, and the aforementioned third sealing ring 16 is provided between the stop head and the bottom wall of the countersunk groove 116.

[0121] See Figure 12 The base 12 is provided with a positioning part 121, and the connector 14 is provided with a positioning hole 141. The positioning part 121 passes through the positioning hole 141 and can position the connector 14 on the base 12. At the same time, at the position where the positioning part 121 passes through the positioning hole 141, the welding process can be used to weld the base 12 and the connector 14.

[0122] See Figure 1 and Figure 12A knockdown plate 122 is provided on the base 12. The knockdown plate 122 is configured to accept external force to detach from the base 12 and forms a wiring hole 123 on the base 12. Specifically, the knockdown plate 122 is connected to the base 12 through a low-strength flange, which facilitates the formation of the wiring hole 123 after being knocked off by the user, making wiring operations convenient. Wiring tabs 14 are spaced apart on one side of the knockdown plate 122 and will not interfere with the knockdown plate 122.

[0123] Further, see Figure 11 Multiple third reinforcing ribs 118 are protruding from the inner wall of the upper shell 11 to improve the strength and deformation resistance of the upper shell 11.

[0124] The electromagnetic starter provided in this embodiment, when connected to the main circuit of the motor 100, causes the thermal relay 3, contactor 6, stop button 2, and start button 5 to operate in accordance with... Figure 13 Connect the wires according to the wiring diagram shown. The main circuit includes a motor 100, a main thermal relay 200, a main contactor 300, and a main fuse 400, etc. Connect them according to the wiring diagram. The wiring of the main circuit and starting circuit of the motor 100 is well known to those skilled in the art and will not be described here.

[0125] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electromagnetic starter, characterized in that, include: The housing assembly (1) has an installation space (10); A stop operation button (2) is provided on the housing assembly (1) for accepting an operation to stop the electromagnetic starter; A thermal relay (3) is provided in the installation space (10). The thermal relay (3) is provided with a stop key (31) for stopping the thermal relay (3) and a reset key (32) for resetting the thermal relay (3). A button assembly (4) is movably disposed on the housing assembly (1). The first end of the button assembly (4) is used to receive a pressing operation. The second end of the button assembly (4) extends into the mounting space (10) and is provided with a pushing part (423). The pushing part (423) is used to push against the stop button (31) and the reset button (32).

2. The electromagnetic starter according to claim 1, characterized in that, The pushing part (423) includes a first pressing rod (4231), a second pressing rod (4232), a first pushing plate (4233), and a second pushing plate (4234); The first pressure rod (4231) extends along the moving direction of the button assembly (4) and is connected to the first push plate (4233); both the first pressure rod (4231) and the first push plate (4233) are positioned directly opposite the second end; The second pressure rod (4232) is set at an angle to the first pressure rod (4231) and is connected to the second push plate (4234); One of the first push plate (4233) and the second push plate (4234) is used to push the stop button (31), and the other is used to push the reset button (32).

3. The electromagnetic starter according to claim 2, characterized in that, A connecting rib (4235) is provided between the first push plate (4233) and the second push plate (4234); There is one connecting rib (4235); or, there are multiple connecting ribs (4235) spaced apart; or, there are multiple connecting ribs (4235) arranged in a crisscross pattern.

4. The electromagnetic starter according to claim 2, characterized in that, The first pressure bar (4231) is provided with a first reinforcing rib (42311) along its extension direction; And / or, the second pressure bar (4232) is provided with a second reinforcing rib (42321) along its extension direction.

5. The electromagnetic starter according to claim 1, characterized in that, The housing assembly (1) is provided with a mounting hole (111), and the button assembly (4) includes: A button (41) is movably disposed in the mounting hole (111), and the first end of the button (41) is used to receive a pressing operation; The pusher (42) includes a guide (421), a limiting part (422), and the pusher (423) connected in sequence; the guide (421) extends movably into the mounting hole (111) and is connected to the button (41); the limiting part (422) is located in the mounting space (10) and abuts against the inner wall of the mounting space (10) in a separable manner. The elastic element (43) has a compression limit located between the button (41) and the bottom wall of the mounting hole (111).

6. The electromagnetic starter according to claim 5, characterized in that, The button (41) includes a pressing part (411) and a connecting part (412) connected together; the guide part (421) is provided with a connecting hole (424); The connecting part (412) passes through the connecting hole (424), the pressing part (411) is located outside the connecting hole (424) to receive pressing operation, and the elastic member (43) is sleeved outside the guiding part (421) and abuts against the pressing part (411); One of the connecting part (412) and the guiding part (421) is provided with a snap-fit ​​structure (4121), and the other is provided with a snap-fit ​​hole (4211). The snap-fit ​​structure (4121) is snapped into the snap-fit ​​hole (4211).

7. The electromagnetic starter according to claim 6, characterized in that, One of the inner walls of the connecting part (412) and the connecting hole (424) is provided with a rib structure (425), and the other is provided with a limiting groove structure (413). The rib structure (425) is inserted into the limiting groove structure (413) along the moving direction of the button assembly (4); And / or, The inner wall of the connecting hole (424) is provided with a first arc surface (4241) and a first plane (4242); the connecting part (412) is provided with a second arc surface (4122) and a second plane (4123); The first arc surface (4241) cooperates with the second arc surface (4122), and the first plane (4242) cooperates with the second plane (4123).

8. The electromagnetic starter according to claim 7, characterized in that, The convex rib structure (425) includes a first limiting rib (4251) and a second limiting rib (4252); the limiting groove structure (413) includes a first limiting groove (4131) and a second limiting groove (4132); The first limiting rib (4251) engages with the first limiting groove (4131), and the second limiting rib (4252) engages with the second limiting groove (4132); The first limiting rib (4251) and the second limiting rib (4252) have different shapes and / or sizes; the first limiting groove (4131) and the second limiting groove (4132) have different shapes and / or sizes.

9. The electromagnetic starter according to any one of claims 1-8, characterized in that, The outer casing assembly (1) includes an upper casing (11), a base (12), fasteners (13), and a connector (14); The upper shell (11) and the base (12) are interlocked to form the installation space (10). One end of the connector (14) is connected to the base (12), and the fastener (13) passes through the upper shell (11) and is connected to the other end of the connector (14).

10. The electromagnetic starter according to claim 9, characterized in that, The outer shell assembly (1) further includes a second sealing ring (15); the upper shell (11) is provided with a fastening groove (114) along the circumferential direction, the edge of the base (12) is inserted into the fastening groove (114), the second sealing ring (15) is provided in the fastening groove (114) and is in sealed contact with the inner wall of the fastening groove (114) and the base (12); And / or, a third sealing ring (16) is provided between the fastener (13) and the upper shell (11); And / or, the base (12) is provided with a positioning part (121), the wiring piece (14) is provided with a positioning hole (141), and the positioning part (121) passes through the positioning hole (141); And / or, the base (12) is provided with a knock-off plate (122), the knock-off plate (122) is configured to receive an external force to detach from the base (12), and a wiring hole (123) is formed on the base (12), and the wiring piece (14) is spaced apart on one side of the knock-off plate (122).

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