High-voltage direct-current relay
By introducing a limit structure into the high-voltage DC relay, the deflection problem of push rod components is solved, efficient assembly and smooth movement are achieved, auxiliary conductive interference is avoided, and the mechanical life and reliability of the product are improved.
Patent Information
- Application Number
- CN202422217513.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-09-11
AI Technical Summary
During the product suction and engagement process of high-voltage DC relay, the push rod component is easily deflected about its axial direction, causing the matching point between the moving contact and the static contact to change, affecting the smooth movement of the product, and may cause the auxiliary conductive parts to interfere or break with the insulating cover.
A limit structure is provided between the push rod component and the insulating base, including a limit projection and a limit groove, to limit the axial deflection of the push rod component about its axial direction during the axial movement. Through the design of multiple sets of limit components, the visual assembly and smooth movement of the push rod component and the insulating base are ensured.
Effectively prevent the push rod components from deflecting axially, improve assembly efficiency and reliability, avoid interference between auxiliary conductive parts and insulating cover, ensure smooth product movement, reduce limit friction, and improve mechanical life.
Smart Images
Figure CN223245502U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of relays, in particular to a high-voltage direct current relay. Background Art
[0002] A relay is an electronic control device that is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit.
[0003] A high-voltage DC relay is a type of relay with the following operating principle: When the coil assembly is operating, the moving iron core moves, driving the moving contact through the push rod component, causing the moving contacts at both ends of the moving contact to contact the two static contacts at the bottom of the two contacts, thereby achieving load circuit conduction. A reaction spring is usually provided between the push rod component and the moving iron core. During the product's attraction process, the push rod component will deflect around its axial direction, causing the mating point between the moving contact and the static contact to change. If the product has auxiliary contacts, it is also easy for the auxiliary conductive parts of the auxiliary contacts (which are usually provided on the push rod component) to interfere with the product's insulation cover, which is not conducive to the smooth operation of the product. It is even easy to cause the auxiliary conductive parts to break when the product undergoes mechanical life testing. Utility Model Content
[0004] The utility model aims at solving the technical problems in the prior art and provides a high-voltage DC relay, which can prevent a push rod component from deflecting.
[0005] The technical solution adopted by the utility model to solve its technical problems is: a high-voltage DC relay, including an insulating cover, a contact assembly, a push rod component and an insulating base, the contact assembly including a plurality of static contacts and a moving contact, the moving contact is arranged on the push rod component and located in the insulating cover, the push rod component is inserted into a clearance through hole provided in the insulating base; each static contact is partially located in the insulating cover and cooperates with the moving contact; a limiting structure is cooperated between the push rod component and the insulating base, and the limiting structure limits the push rod component from deflecting around its axial direction during axial movement.
[0006] Furthermore, the limiting structure includes at least one group of limiting components, and the limiting components include paired limiting protrusions and limiting grooves, one of the limiting protrusions and the limiting grooves is provided on the pushing rod component, and the other of the limiting protrusions and the limiting grooves is provided on the insulating base, and the limiting protrusion enters the limiting groove.
[0007] Furthermore, the size of the limiting protrusion or the limiting groove provided on the insulating base in the axial direction of the pushing rod component is greater than or equal to the movement stroke of the pushing rod component in its axial direction.
[0008] Furthermore, the limiting protrusion and the limiting groove are in clearance fit before the push rod component is deflected, and the limiting protrusion and the limiting groove are in contact fit when the push rod component is deflected.
[0009] Furthermore, the limiting protrusion and the limiting groove form a line-surface contact fit when the push rod component is deflected.
[0010] Furthermore, the cross-sections of the two opposite inner side surfaces of the limiting groove of at least one group of limiting components are in an eight-shape, and the interval between the ends of the two inner side surfaces with a larger distance between them constitutes a notch of the limiting groove, and the tail end face of the limiting protrusion corresponding to the limiting groove is an outwardly convex arc surface, or, the corners of the tail end of the limiting protrusion corresponding to the limiting groove are respectively set as rounded corners.
[0011] Furthermore, the two opposite inner side surfaces of the limiting groove of at least one group of limiting components are respectively outwardly convex arc surfaces, and the parts where the limiting protrusions cooperate with the arc surfaces are straight surfaces.
[0012] Furthermore, a side of the insulating base facing the moving contact is provided with a frame structure located at the periphery of the push rod component, and the frame structure is provided with the limiting groove or limiting protrusion.
[0013] Furthermore, the limiting groove is formed by the gap between two ribs disposed opposite each other on an inner side surface of the frame structure, or the limiting groove is formed by a notch provided on the frame structure; the limiting protrusion is provided on the outer side surface of the push rod component. Furthermore, the limiting components are provided in multiple groups, and the multiple groups of limiting components are located on different sides of the push rod component.
[0014] Furthermore, the pushing rod component forms a group of the limiting components between the insulating base and the two sides in the width direction of the moving contact; and also includes an auxiliary contact component, which includes an auxiliary conductive part and two auxiliary lead-out terminals arranged on the insulating cover, wherein a group of the limiting assemblies has a limiting protrusion provided with a supporting part, the auxiliary conductive part is provided on the supporting part, and the two ends of the auxiliary conductive part are respectively matched with the two auxiliary lead-out terminals, and the limiting protrusion provided with the supporting part is provided on the outer side surface of the pushing rod component.
[0015] Furthermore, the push rod component includes a spring seat, a push rod and a bracket, one end of the push rod is fixed to the spring seat, the bracket is arranged on the spring seat, the moving contact can be arranged in the bracket so as to move up and down, and a contact spring is cooperated between the moving contact and the spring seat; the outer side surface of the spring seat is provided with the limiting protrusion or the limiting groove.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] 1. Since a limiting structure is provided between the push rod component and the insulating base, the limiting structure limits the push rod component from deflecting around its axial direction during the up and down movement, so that the push rod component of the utility model will not deflect around its axial direction during the product suction process. In addition, the limiting structure is formed between the push rod component and the insulating base, so that the utility model can realize the visualization of the assembly of the push rod component and the insulating base, which not only greatly improves the assembly efficiency and assembly reliability, but also allows to observe whether there is interference between the push rod component and the limiting structure during movement, thereby facilitating the adjustment of the limiting structure to the optimal state through structural improvement.
[0018] 2. The limiting protrusion and limiting groove only come into contact when the push rod is deflected, ensuring that the push rod does not interfere with the insulating base during assembly and allowing for smoother operation in the non-deflected state. In particular, the limiting protrusion and limiting groove form a linear and surface contact when the push rod is deflected, further reducing contact friction between the limiting protrusion and the limiting groove, thereby further improving the smoothness of the product's operation.
[0019] 3. The number of the limiting assemblies is multiple, which can greatly improve the effect of limiting the deflection of the push rod component. In particular, when the present invention also includes an auxiliary contact assembly, the auxiliary conductive member of the auxiliary contact assembly is disposed on the support portion provided with the limiting protrusion of one set of the limiting assemblies. This allows one of the limiting protrusions of the present invention to both limit the push rod component and provide support for the auxiliary conductive member, thereby eliminating the need for an additional mounting carrier for the auxiliary conductive member.
[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the high-voltage DC relay of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a cross-sectional view of the utility model Figure 1 ;
[0022] Figure 2 This is a cross-sectional view of the utility model Figure 2 ;
[0023] Figure 3 It is an exploded schematic diagram of the local structure of the utility model;
[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the push rod component of the utility model (excluding the push rod);
[0025] Figure 5 This is a top view of the push rod component of the utility model (excluding the push rod);
[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the push rod component of the utility model;
[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the insulating base of the utility model;
[0028] Figure 8 It is a top view of the insulating base of the utility model;
[0029] Figure 9 This is a schematic diagram of the three-dimensional structure of the push rod component and the insulating base in the combined state of the utility model;
[0030] Figure 10 This is a top view of the push rod component and the insulating base of the utility model in the assembled state;
[0031] In the figure, 1. insulating cover, 2. static contact, 3. moving contact, 4. push rod component, 41. spring seat, 411. first limiting protrusion, 412. second limiting protrusion, 413. support part, 42. bracket, 43. push rod, 44. contact spring, 5. insulating base, 51. give way through hole, 52. first limiting groove, 53. second limiting groove, 54. rib, 55. frame structure, 6. upper iron cup, 7. lower iron cup, 8. coil assembly, 9. moving iron core, 10. reaction spring, 20. shell, 30. epoxy glue, 40. auxiliary conductive part, 50. auxiliary lead-out terminal. DETAILED DESCRIPTION
[0032] In the present invention, the terms "first," "second," and the like are used only to distinguish similar objects, and are not used to describe a specific order or precedence, nor should they be understood as indicating or implying relative importance. The use of terms such as "upper," "lower," "inner," "outer," and "top / bottom" to indicate positions or location relationships in the description is based on the positions or location relationships shown in the accompanying drawings and is intended solely to facilitate the description of the present invention. They are not intended to indicate or imply that the devices referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be understood as limiting the scope of protection of the present invention. A person of ordinary skill in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0033] In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more, "multiple groups" means two or more, and "at least one group" means one or more. In the description of the present invention, unless otherwise specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.
[0034] See Figures 1-10 As shown, a high-voltage DC relay of the present invention includes an insulating cover 1, a contact assembly, a push rod component 4 and an insulating base 5. The bottom of the insulating cover 1 is connected to the insulating base 5, and the two form a accommodating cavity. The contact assembly includes a plurality of static contacts 2 and a moving contact 3. The moving contact 3 is arranged on the push rod component 4 and is located in the accommodating cavity. The push rod component 4 is inserted into the clearance hole 51 provided in the middle of the insulating base 5. The number of static contacts 2 is specifically two, and each static contact 2 is respectively arranged at the top of the insulating cover 1, and each static contact 2 partially enters the accommodating cavity and cooperates with the two ends of the moving contact 3 respectively. A limiting structure is provided between the push rod component 4 and the insulating base 5, and the limiting structure limits the push rod component 4 from deflecting around its axial direction during axial movement.
[0035] The limiting structure includes multiple groups of limiting components, but is not limited thereto. In other embodiments, the limiting structure includes one group of limiting components. Each group of limiting components includes a pair of matching limiting protrusions and limiting grooves. One of the limiting protrusions and limiting grooves is provided on the outer side of the push rod component 4, and the other of the limiting protrusions and limiting grooves is provided on the insulating base 5, with the limiting protrusions entering the limiting grooves. The limiting protrusions and limiting grooves of each group of limiting components form a clearance fit before the push rod component 4 deflects. The limiting protrusions and limiting grooves of each group of limiting components form a contact fit when the push rod component 4 deflects, thereby limiting the push rod component 4 from further deflecting. Specifically, the limiting protrusions and limiting grooves of each group of limiting components form a line-surface contact fit when the push rod component 4 deflects, which can reduce the contact friction between the limiting protrusions and the limiting grooves, thereby improving the smoothness of the product movement. The size of the limiting protrusion or limiting groove provided on the insulating base 5 in the axial direction of the push rod component 4 is greater than or equal to the movement stroke of the push rod component 4 in the axial direction, so that the push rod component 4 is limited during the movement to prevent deflection.
[0036] In this embodiment, the number of limiter assemblies is described as two sets. The two sets of limiter assemblies are located on either side of the push rod component 4 in the width direction of the movable contact 3, and the two sets of limiter assemblies are arranged along the width direction of the movable contact 3, but the arrangement is not limited to this. For ease of distinction, the limiter protrusion and limiter groove of one set of limiter assemblies are named the first limiter protrusion 411 and the first limiter groove 52, respectively, and the limiter protrusion and limiter groove of the other set of limiter assemblies are named the second limiter protrusion 412 and the second limiter groove 53, respectively.
[0037] In this embodiment, the cross-sections of the two opposing inner surfaces of the first limiting groove 52 are shaped like a figure eight, and the gap between the ends of the two inner surfaces with the larger spacing forms the notch of the first limiting groove 52. This ensures that the first limiting groove 52 and the first limiting protrusion 411 meet the requirement of a clearance fit while also reducing friction. The tail end surface of the first limiting protrusion 411 is an outwardly convex arc surface, or the corners of the tail end of the first limiting protrusion 411 are rounded. This ensures that the first limiting groove 52 and the first limiting protrusion 411 form a linear contact fit when the push rod component 4 deflects, further reducing the contact friction between the first limiting protrusion 411 and the first limiting groove 52, thereby preventing the scraping of plastic chips that may affect the normal operation of the product. The tail end of the first limiting protrusion 411 refers to the end of the first limiting protrusion 411 located within the first limiting groove 52. The two opposite inner side surfaces of the second limiting groove 53 are respectively convex arc surfaces, and the part where the second limiting protrusion 412 cooperates with the arc surface is a straight surface, so that the second limiting groove 53 and the second limiting protrusion 412 form a line-surface contact when the push rod component 4 is deflected.
[0038] In this embodiment, the side of the insulating base 5 facing the movable contact 3 is provided with a frame structure 55 positioned around the push rod component 4. The retaining groove is formed by the space between two opposing ribs on the inner side of the frame structure 55, or alternatively, by a notch provided in the frame structure 55. Specifically, in this embodiment, the first retaining groove 52 is formed by the space between two opposing ribs 54 on the inner side of the frame structure 55. Because the opposing inner sides of the first retaining groove 52 have an "e" shape in cross-section, the two ribs 54 are shaped outwards in an "e" shape. This prevents the gap from being too small when the straight edges are joined together, minimizes the deflection of the push rod component 4, and ensures line-to-surface contact. Furthermore, the outwards "e" design of the two ribs 54 enhances their strength and facilitates demolding during injection molding. The second retaining groove 53 is formed by a notch provided in the frame structure 55. The first limiting protrusion 411 and the second limiting protrusion 412 are respectively provided on two outer side surfaces of the push rod component 4 in the width direction of the moving contact 3 , and the connecting line of the first limiting protrusion 411 and the second limiting protrusion 412 passes through the central axis of the push rod component 4 .
[0039] In this embodiment, the utility model also includes an auxiliary contact assembly, which includes an auxiliary conductive part 40 and two auxiliary lead-out terminals 50 arranged on the top of the insulating cover 1. The second limiting protrusion 412 is provided with a support portion 413. The auxiliary conductive part 40 is in a cross shape and is composed of a spring leaf. The auxiliary conductive part 40 is arranged on the support portion 413, and the two ends of the auxiliary conductive part 40 are respectively matched with the two auxiliary lead-out terminals 50.
[0040] In this embodiment, the push rod component 4 includes a spring seat 41, a push rod 43, and a bracket 42. The upper end of the push rod 43 is fixed to the spring seat 41, and the lower end of the push rod 43 extends through the clearance hole 51 of the insulating base 5. The bracket 42 is provided on the spring seat 41. The movable contact 3 is disposed in the bracket 42 so as to be movable up and down. A contact spring 44 is engaged between the movable contact 3 and the spring seat 41. The outer side of the spring seat 41 is provided with the first limiting protrusion 411 and the second limiting protrusion 412, and the spring seat 41 is engaged within the frame structure 55 of the insulating base 5.
[0041] In this embodiment, the present invention further includes a housing 20, an upper iron cup 6, a lower iron cup 7, a coil assembly 8, a movable iron core 9, and a reaction spring 10. The insulating cover 1 and the insulating base 5 are disposed within the upper iron cup 6, the lower iron cup 7 is located below the upper iron cup 6, the coil assembly 8 is disposed within the lower iron cup 7, and the movable iron core 9 is disposed in a through hole in the center of the coil assembly 8, which can move up and down. The lower end of the push rod 43 passes through the bottom wall of the upper iron cup 6 and connects to the movable iron core 9. The reaction spring 10 is sleeved outside the push rod 43 and extends between the upper iron cup 6 and the movable iron core 9. The upper iron cup 6 and the lower iron cup 7 are respectively installed in the housing 20, and the space between the top of the housing 20 and the top of the upper iron cup 6 and the top of the insulating cover 1 is filled with epoxy glue 30. Therefore, the present invention constitutes an epoxy-sealed high-voltage DC relay.
[0042] The present invention relates to a high-voltage DC relay in which, before the static contact 2 and the moving contact 3 are engaged, each limiting protrusion forms a clearance fit with the corresponding limiting groove. When the coil of the coil assembly 8 is energized, the moving iron core 9 moves upward under the action of the magnetic field, compressing the reaction spring 10 and driving the push rod component 4 upward. As the push rod component 4 moves upward, the moving contact 3 moves upward with it until it contacts the bottoms of the two static contacts 2, and the contact spring 44 is compressed. The auxiliary conductive member 40 also moves upward with the push rod component 4 until it contacts the two auxiliary lead terminals 50 and outputs a monitoring signal. During this process, the push rod component 4 tends to deflect around its axial direction under the action of the reaction spring 10, so that each limiting protrusion is in line-surface contact with an inner side surface of the corresponding limiting groove, thereby limiting the deflection of the push rod component 4, avoiding the change of the contact point between the moving contact 3 and the static contact, and avoiding the interference between the auxiliary conductive part 40 and the part of the insulating cover 1 where the auxiliary lead-out terminal 50 is fixed, ensuring smooth operation of the product, and avoiding the auxiliary conductive part 40 from breaking due to interference with the insulating cover 1 during the mechanical life test of the product.
[0043] The utility model provides a high-voltage DC relay, which adopts an insulating base 5 and a push rod component 4 to cooperate to form the limiting structure, so that the push rod component 4 will not deflect around its axial direction during the product attraction process, and the utility model can realize the assembly visualization of the push rod component 4 and the insulating base 5, which not only greatly improves the assembly efficiency and assembly reliability, but also can observe whether there is interference between the push rod component 4 and the limiting structure during movement, thereby facilitating the adjustment of the limiting structure to the optimal state through structural improvement.
[0044] The utility model provides a high-voltage DC relay, and the unrelated parts are the same as those in the prior art or can be implemented by using the prior art.
[0045] The above embodiments are only used to further illustrate a high-voltage DC relay of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the technical solution of the present invention.
Claims
1. A high-voltage DC relay, comprising an insulating cover, a contact assembly, a push rod component, and an insulating base, wherein the contact assembly includes a plurality of stationary contacts and a movable contact, the movable contact being disposed on the push rod component and positioned within the insulating cover, the push rod component being inserted through a clearance hole provided in the insulating base; each stationary contact being partially positioned within the insulating cover and cooperating with the movable contact; characterized in that: A limiting structure is provided between the push rod component and the insulating base, and the limiting structure limits the push rod component from deflecting around its axial direction during axial movement.
2. The high-voltage DC relay according to claim 1, wherein: The limiting structure includes at least one group of limiting components, and the limiting components include paired limiting protrusions and limiting grooves. One of the limiting protrusions and limiting grooves is provided on the pushing rod component, and the other of the limiting protrusions and limiting grooves is provided on the insulating base, and the limiting protrusion enters the limiting groove.
3. The high-voltage DC relay according to claim 2, wherein: The size of the limiting protrusion or the limiting groove provided on the insulating base in the axial direction of the pushing rod component is greater than or equal to the movement stroke of the pushing rod component in the axial direction.
4. The high-voltage DC relay according to claim 2, wherein: The limiting protrusion and the limiting groove are in clearance fit before the push rod component is deflected, and the limiting protrusion and the limiting groove are in contact fit when the push rod component is deflected.
5. The high-voltage DC relay according to claim 4, characterized in that: The limiting protrusion and the limiting groove form a line-surface contact fit when the push rod component is deflected.
6. The high-voltage DC relay according to claim 5, characterized in that: The cross-sections of the two opposite inner side surfaces of the limiting groove of at least one group of limiting components are in an eight-shape, and the interval between the ends of the two inner side surfaces with a larger distance between them constitutes a notch of the limiting groove. The end face of the tail end of the limiting protrusion corresponding to the limiting groove is an outwardly convex arc surface, or the corners of the tail end of the limiting protrusion corresponding to the limiting groove are respectively set as rounded corners.
7. The high-voltage DC relay according to claim 5, characterized in that: The two opposite inner side surfaces of the limiting groove of at least one group of limiting components are respectively outwardly convex arc surfaces, and the parts where the limiting protrusions cooperate with the arc surfaces are straight surfaces.
8. The high-voltage DC relay according to claim 2, wherein: A side of the insulating base facing the moving contact is provided with a frame structure located at the periphery of the push rod component, and the frame structure is provided with the limiting groove or the limiting protrusion.
9. The high-voltage DC relay according to claim 8, characterized in that: The limiting groove is formed by the interval between two ribs arranged opposite to each other on an inner side surface of the frame structure, or the limiting groove is formed by a notch groove arranged on the frame structure; the limiting protrusion is arranged on the outer side surface of the push rod component.
10. The high-voltage DC relay according to any one of claims 2 to 9, characterized in that: There are multiple groups of the limiting components, and the multiple groups of the limiting components are located on different sides of the pushing rod component.
11. The high-voltage DC relay according to claim 10, characterized in that: The pushing rod component forms a group of limiting components between the insulating base and the two sides of the moving contact in the width direction; it also includes an auxiliary contact component, which includes an auxiliary conductive part and two auxiliary lead-out terminals arranged on the insulating cover, wherein a group of limiting assemblies has a limiting protrusion provided with a supporting part, the auxiliary conductive part is provided on the supporting part, and the two ends of the auxiliary conductive part are respectively matched with the two auxiliary lead-out terminals, and the limiting protrusion provided with the supporting part is provided on the outer side surface of the pushing rod component.
12. The high-voltage DC relay according to any one of claims 2 to 9 or claim 11, wherein: The push rod component includes a spring seat, a push rod and a bracket. One end of the push rod is fixed to the spring seat. The bracket is arranged on the spring seat. The moving contact is arranged in the bracket so as to be movable up and down. A contact spring is cooperated between the moving contact and the spring seat. The outer side surface of the spring seat is provided with the limiting protrusion or the limiting groove.