Electromagnetic relay
By setting multiple convex parts as sliding contact positions on the armature part of the electromagnetic relay and setting a give way block on the plastic part, the problems of friction lag and burrs falling off during the rotation of the armature part are solved, and the sliding smoothness and reliability of the relay are improved.
Patent Information
- Application Number
- CN202421305227.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-06-07
AI Technical Summary
In existing electromagnetic relays, the armature part is prone to slanting during rotation, causing contact friction, and the burrs of injection-molded plastic parts may fall off to form free plastic chips, affecting the normal operation of the relay.
By providing a plurality of protrusions on the first and second outer surfaces of the armature part as sliding contact positions during rotation, and a give way blocks are provided on the parting surface of the plastic part to avoid falling off.
It reduces frictional stuttering of the armature part during rotation, reduces the risk of burrs falling off of plastic parts, and improves the sliding smoothness and reliability of the relay.
Smart Images
Figure CN222785221U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of relays, in particular to an electromagnetic relay. Background Art
[0002] An electromagnetic relay in the prior art has an armature whose middle part is rotatably connected between a base and a housing, and in order to ensure the flexible rotation of the armature, the armature is fitted with a clearance between the housing and the base in the direction of the rotation axis. When the armature is subjected to the combined action of multiple forces during the rotation process, it is easy to cause a certain angle of yaw motion, which causes the outer surface of the armature in the direction of its rotation axis to be easily in contact and rub against the housing and / or the base. Since the armature includes an armature and a plastic part, the armature and the plastic part are integrally insert-molded, and the plastic part, as an injection-molded part, will inevitably have burrs on its parting surface. The protruding burrs may be higher than the outer surface. The protruding burrs are more likely to generate free plastic chips when rubbed against the housing and / or the base during the rotation of the armature, and the plastic chips may be free to the contact position, thereby causing the relay to fail. In addition, the armature of the armature part is a metal workpiece, and it is difficult to avoid corner collapse and a punching fracture zone during the punching process, and there may be defects such as bruises and curling during the electroplating process. Utility Model Content
[0003] The utility model mainly aims at the technical problem that the raised burrs on the parting surface of the plastic part are prone to generate free plastic chips during the rotation of the armature part, and provides an electromagnetic relay which, through structural improvement, makes the sliding friction of the armature part smoother during the rotation process, thereby reducing the risk of free plastic chips forming from the burrs of the plastic part.
[0004] The technical solution adopted by the utility model to solve its technical problems is: an electromagnetic relay, the armature part is located in the shell part, and the middle part of the armature part is rotatably connected to the shell part, and the armature part has a first outer surface and a second outer surface arranged opposite to each other in the direction of its rotation axis; the first outer surface and / or the second outer surface are protruded outwardly with one or more protrusions, and the protrusions serve as sliding contact positions for the armature part to cooperate with the shell part during rotation.
[0005] Furthermore, the armature part includes an armature and a plastic part, the armature and the plastic part are integrally insert-molded together, and the protrusion is arranged on the plastic part; the first outer surface and the second outer surface are respectively provided with the multiple protrusions, and the protrusions on the first outer surface and / or the protrusions on the second outer surface are clearance-fitted with the shell part when the armature part is in a stationary state.
[0006] Furthermore, the convex portion has a smooth outer surface; the convex portion is a convex bud structure, and its surface is an arc spherical surface.
[0007] Furthermore, the shell component includes a base and a shell, the shell is connected to the base, the armature part is rotatably connected between the base and the shell, and the protrusion arranged on the first outer surface serves as a sliding contact position for the armature part to cooperate with the shell during rotation, and the protrusion arranged on the second outer surface serves as a sliding contact position for the armature part to cooperate with the base during rotation.
[0008] Furthermore, the base is provided with a rotating shaft, and the armature part is provided with an axial hole corresponding to the rotating shaft, the rotating shaft is passed through the axial hole, and the two are clearance-fitted so that the armature part rotates around the rotating shaft; the inner top surface of the outer shell is provided with a limiting boss corresponding to the rotating shaft, and the limiting boss abuts against the tail end of the rotating shaft, or the limiting boss and the tail end of the rotating shaft are clearance-fitted.
[0009] Furthermore, the base is provided with a circle of supporting bosses at the root of the rotating shaft, and the second outer surface of the armature part contacts the supporting bosses.
[0010] Furthermore, the first outer surface is provided with a circle of recessed grooves leading to the shaft hole around the shaft hole, and the limiting boss enters the recessed groove. During the rotation of the armature part, the bottom surface of the recessed groove cooperates with the bottom end of the limiting boss to limit.
[0011] Furthermore, the armature has two oppositely arranged pole shoe surfaces at both ends in its length direction, and the two pole shoe surfaces are respectively parallel to the rotation axis; the plastic part forms a groove between the two pole shoe surfaces, and the two pole shoe surfaces are respectively exposed outside the two opposite side surfaces of the groove, and the two opposite side surfaces of the groove are respectively provided with a yielding platform surrounding the pole shoe surface on the periphery of the pole shoe surface.
[0012] Furthermore, the two pole shoe surfaces are one larger than the other, and the armature part presents a centrally symmetrical structure.
[0013] Furthermore, the multiple convex portions on the first outer surface and / or the second outer surface are at least two groups, each group includes at least two convex portions distributed along the width direction of the armature part, and the at least two groups of convex portions are distributed along the length direction of the armature part, and the rotation axis is located between the at least two groups of convex portions; the rotation axis is located in the thickness direction of the armature part.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1. Since the first outer surface and / or the second outer surface of the armature part are provided with one or more protrusions protruding outward, the protrusions serve as the sliding contact positions of the armature part during the rotation process, so that the sliding contact area of the armature part of the utility model can avoid injection molding burrs, prevent the injection molding burrs from causing jamming interference when contacting the housing parts during the rotation of the armature part, make the sliding friction smoother, and reduce the risk of injection molding burrs falling off due to friction to form free plastic chips.
[0016] 2. The convex part has a smooth outer surface. In particular, the convex part is a convex bud structure, and its surface is an arc spherical surface, so that the contact area between the armature part and the adjacent parts during the rotation process is small, further improving the sliding smoothness of the armature part.
[0017] 3. The first outer surface is provided with a circle of recessed grooves leading to the shaft hole around the shaft hole, and the limiting boss enters the recessed groove. During the rotation of the armature part, the bottom surface of the recessed groove cooperates with the bottom end of the limiting boss to limit the rotation, so that the rotation of the armature part is more reliable.
[0018] 4. The setting of the give-way sink makes the pole shoe surface of the armature protrude a certain distance from the plastic part, and the parting surface position of the plastic part can form an avoidance area by utilizing the give-way sink, so as to avoid the stamping defect position of the metal part (such as collapsed angle deformation, local damage to the fracture zone, etc.), reduce the generation of burrs of the plastic parts during the injection molding process, and prevent burrs from being generated on the mating surface of the armature and the iron core of the coil part, thereby affecting the magnetic contact.
[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the electromagnetic relay of the utility model is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is an exploded schematic diagram of the utility model;
[0021] Figure 2 This is a three-dimensional structure diagram of the armature part of the utility model. Figure 1 ;
[0022] Figure 3 This is a three-dimensional structure diagram of the armature part of the utility model. Figure 2 ;
[0023] Figure 4 It is a three-dimensional structural schematic diagram of the base of the utility model;
[0024] Figure 5 It is a three-dimensional structural schematic diagram of the shell of the utility model;
[0025] Figure 6 It is a three-dimensional structural schematic diagram of the utility model (excluding the housing);
[0026] Figure 7 It is the front view of the utility model;
[0027] Figure 8 It is the AA cross-sectional view of the utility model;
[0028] Fig. 9 It is a BB cross-sectional view of the utility model; Fig.10 yes Fig. 9 A magnified schematic diagram of part A;
[0029] Fig.11 yes Fig. 9 A magnified schematic diagram of part B;
[0030] Fig.12 yes Fig. 9 A magnified schematic diagram of part C;
[0031] Fig.13 is a cross-sectional view of another embodiment of the utility model;
[0032] Fig.14 yes Fig.13 The enlarged schematic diagram of the D part;
[0033] In the figure, 1, armature part, 11 / 12, convex part, 13, pole shoe surface, 14, groove, 141, yielding sink platform, 15, shaft hole, 16, sink groove, 2, base, 21, rotating shaft, 22, supporting boss, 3, shell, 31, limiting boss, 4, coil part, 5, push card, 6, contact part. DETAILED DESCRIPTION
[0034] In the present utility model, the terms "first", "second", etc. are only used to distinguish similar objects, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present utility model, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previously associated objects are in an "or" relationship.
[0035] See also Figure 1-Figure 12As shown, an electromagnetic relay of the utility model includes a housing component and an armature part 1, wherein the armature part 1 is located in the housing component, and the middle part of the armature part 1 is rotatably connected to the housing component, and the armature part 1 uses the center axis in the thickness direction as the rotation axis. The armature part 1 has a first outer surface and a second outer surface that are arranged opposite to each other in the direction where its rotation axis is located, and the first outer surface and / or the second outer surface are provided with one or more protrusions 11 / 12 protruding outwardly, and the protrusions 11 / 12 serve as sliding contact positions for the armature part 1 to cooperate with the housing component during rotation. The armature part 1 specifically includes an armature and a plastic part, and the armature and the plastic part are integrally insert-molded, and the protrusions 11 / 12 are provided on the plastic part. Specifically, in the present embodiment, the first outer surface and the second outer surface are respectively provided with protrusions 11 / 12, and the number of the protrusions 11 / 12 is multiple, but not limited to this. In other embodiments, the number of the protrusions 11 / 12 is one. When the armature part 1 is stationary, the protrusions 11 / 12 are clearance-fitted with the housing component, such as Fig. 9 , Fig.10 , Fig.11 shown.
[0036] The convex parts 11 / 12 have a smooth outer surface. Preferably, the convex parts 11 / 12 are convex bud structures, and their surfaces are arc spherical surfaces, but not limited thereto. In other embodiments, the convex parts 11 / 12 are convex rib structures, etc. The multiple convex parts 11 on the first outer surface are respectively divided into at least two groups, each group includes two convex parts 11 distributed along the width direction of the armature part 1, and the at least two groups are distributed along the length direction of the armature part 1 and are evenly distributed on both sides of the axis of the armature part 1, such as Figure 2 Similarly, the plurality of protrusions 12 on the second outer surface are also arranged in this manner, such as Figure 3 Specifically, four convex portions 11 / 12 are respectively provided on the first outer surface and the second outer surface, but the present invention is not limited thereto. Figure 2 As shown, the length direction of the armature part 1 is Figure 2 The direction of the X-axis in the three-dimensional coordinate system is the width direction of the armature part 1. Figure 2 The direction of the Y axis in the three-dimensional coordinate system, the thickness direction of the armature part 1 can also be called the height direction, is Figure 2 The direction of the Z axis in the three-dimensional coordinate system.
[0037] In this embodiment, the armature has two oppositely disposed pole shoe surfaces 13 at both ends in the length direction thereof, the two pole shoe surfaces 13 are respectively parallel to the rotation axis of the armature part 1, and the two pole shoe surfaces 13 are one large and one small, and the armature part 1 is in a centrally symmetrical structure. The plastic part forms a groove 14 between the two pole shoe surfaces 13, the two pole shoe surfaces 13 are respectively exposed outside the two opposite side surfaces of the groove 14, and the two opposite side surfaces of the groove 14 are respectively provided with a yielding platform 141 surrounding the pole shoe surface 13 on the outer periphery of the pole shoe surface 13.
[0038] In this embodiment, the shell component also includes a base 2 and a shell 3, the shell 3 is connected to the base 2, the armature part 1 is rotatably connected between the base 2 and the shell 3, and the protrusion 11 arranged on the first outer surface serves as a sliding contact position for the armature part 1 to cooperate with the shell 3 during the rotation process, and the protrusion 12 arranged on the second outer surface serves as a sliding contact position for the armature part 1 to cooperate with the base 2 during the rotation process.
[0039] like Figure 4 As shown, the base 2 is provided with a rotating shaft 21, and the armature part 1 is provided with an axial hole 15 corresponding to the rotating shaft 21, and the rotating shaft 21 is passed through the axial hole 15 so that the armature part 1 rotates around the rotating shaft 21. Figure 5 As shown, the inner top surface of the housing 3 is provided with a limiting boss 31 corresponding to the rotating shaft 21, and the limiting boss 31 and the rear end of the rotating shaft 21 are clearance-matched, as shown in FIG. Fig. 9 , Fig.12 As shown, but not limited to this, in other embodiments, the limiting boss 31 abuts against the rear end of the rotating shaft 21, such as Fig.13 , Fig.14 shown.
[0040] like Figure 4 As shown, the base 2 is provided with a circle of supporting bosses 22 at the root of the rotating shaft 21 , and the second outer surface of the armature part 1 is in contact with the supporting bosses 22 at a portion corresponding to the supporting bosses 22 .
[0041] like Figure 2 As shown, the first outer surface is provided with a circle of recessed grooves 16 leading to the shaft hole 15 around the shaft hole 15, and the limiting boss 31 on the top surface of the shell 3 enters the recessed groove 16. During the rotation of the armature part 1, the bottom surface of the recessed groove 16 cooperates with the bottom end of the limiting boss 31 to limit, so that the rotation of the armature part 1 is more reliable.
[0042] In this embodiment, the utility model further includes a coil part 4, a contact part 6 and four push cards 5. The coil part 4 is installed in the base 2 from the opening provided at the bottom end of the base 2, and the two ends of the iron core of the coil part 4 are respectively matched between the two pole shoe surfaces 13 at the two ends of the armature part 1. The contact part 6 includes four groups of contact units, which are respectively mounted on the base 2. One end of the armature part 1 in the length direction is matched between two of the groups of contact units, and the other end of the armature part 1 in the length direction is matched between the remaining two groups of contact units. The movable spring part of each contact unit is matched with the armature part 1 through the push card 5, so that the armature part 1 pushes each push card 5 to move by rotating to control the corresponding contact unit to close or open.
[0043] The utility model provides an electromagnetic relay, in which convex portions 11 / 12 are respectively provided on the first outer surface and the second outer surface of the armature part 1, and the convex portions 11 / 12 can be used as the sliding contact position of the armature part 1 to the outside during the rotation process, so that the sliding contact area of the armature part 1 can avoid injection molding burrs, and prevent the injection molding burrs from causing jamming interference when the armature part 1 contacts the housing 3 and the base 2 during the rotation process of the armature part 1, thereby making the sliding friction of the armature part 1 smoother and reducing the risk of the injection molding burrs falling off due to friction to form free plastic chips.
[0044] The plastic part of the utility model is respectively provided with a yielding platform 141 corresponding to each pole shoe surface 13 of the armature, so that the pole shoe surface 13 of the armature protrudes a certain distance from the plastic part, and the parting surface position of the plastic part can form an escape area by utilizing the yielding platform, so as to avoid the stamping defect position of the metal part (such as collapsed angle deformation, local damage of the fracture zone, etc.), reduce the generation of burrs of the plastic part during the injection molding process, and further prevent the generation of burrs on the mating surface of the armature and the iron core of the coil part 4, thereby preventing the magnetic contact from being affected.
[0045] The utility model provides an electromagnetic relay, and the unrelated parts are the same as those in the prior art or can be implemented by using the prior art.
[0046] The above embodiments are only used to further illustrate an electromagnetic relay of the utility model, but the utility model 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 utility model fall within the protection scope of the technical solution of the utility model.
Claims
1. An electromagnetic relay, comprising a housing component and an armature part, wherein the armature part is located in the housing component, and the middle part of the armature part is rotatably connected to the housing component, and the armature part has a first outer surface and a second outer surface disposed opposite to each other in the direction of its rotation axis; characterized in that: The first outer surface and / or the second outer surface is / are provided with one or more protrusions protruding outwardly, and the protrusions serve as sliding contact positions for the armature part to cooperate with the housing component during the rotation process.
2. The electromagnetic relay according to claim 1, characterized in that: The armature part includes an armature and a plastic part, which are integrally insert-molded together, and the convex portion is arranged on the plastic part; the first outer surface and the second outer surface are respectively provided with the convex portion, and the convex portion on the first outer surface and / or the convex portion on the second outer surface are clearance-fitted with the shell part when the armature part is in a stationary state.
3. The electromagnetic relay according to claim 1, characterized in that: The convex part has a smooth outer surface; the convex part is a convex bud structure, and its surface is an arc spherical surface.
4. The electromagnetic relay according to any one of claims 1 to 3, characterized in that: The shell component includes a base and a shell, the shell is connected to the base, the armature part is rotatably connected between the base and the shell, and the protrusion arranged on the first outer surface serves as a sliding contact position for the armature part to cooperate with the shell during rotation, and the protrusion arranged on the second outer surface serves as a sliding contact position for the armature part to cooperate with the base during rotation.
5. The electromagnetic relay according to claim 4, characterized in that: The base is provided with a rotating shaft, and the armature part is provided with an axial hole corresponding to the rotating shaft. The rotating shaft is inserted into the axial hole, and the two are clearance-fitted so that the armature part rotates around the rotating shaft; the inner top surface of the outer shell is provided with a limiting boss corresponding to the rotating shaft, and the limiting boss abuts against the tail end of the rotating shaft, or the limiting boss and the tail end of the rotating shaft are clearance-fitted.
6. The electromagnetic relay according to claim 5, characterized in that: The base is provided with a circle of supporting bosses at the root of the rotating shaft, and the second outer surface of the armature part contacts the supporting bosses.
7. The electromagnetic relay according to claim 5, characterized in that: The first outer surface is provided with a circle of recessed grooves leading to the shaft hole around the shaft hole, and the limiting boss enters the recessed groove. During the rotation of the armature part, the bottom surface of the recessed groove cooperates with the bottom end of the limiting boss to limit.
8. The electromagnetic relay according to claim 2, characterized in that: The armature has two oppositely arranged pole shoe surfaces at both ends in its length direction, and the two pole shoe surfaces are parallel to the rotation axis respectively; the plastic part forms a groove between the two pole shoe surfaces, and the two pole shoe surfaces are exposed outside the two opposite side surfaces of the groove respectively, and the two opposite side surfaces of the groove are respectively provided with a yielding platform surrounding the pole shoe surface on the periphery of the pole shoe surface.
9. The electromagnetic relay according to claim 8, characterized in that: The two pole shoe surfaces are one large and one small, and the armature part is of a centrally symmetrical structure.
10. The electromagnetic relay according to claim 1, characterized in that: The multiple convex portions on the first outer surface and / or the second outer surface are at least two groups, each group includes at least two convex portions distributed along the width direction of the armature part, and the at least two groups of convex portions are distributed along the length direction of the armature part, and the rotation axis is located between the at least two groups of convex portions; the rotation axis is located in the thickness direction of the armature part.