Mounting structure of static iron core

Abstract

The mounting structure of the static iron core comprises the static iron core and a base and further comprises a buffer part, the buffer part is fixed to the outer side of the bottom edge of the static iron core, a supporting flange used for supporting the static iron core is arranged on the side, facing the static iron core, of the buffer part in a protruding mode, and a fixing groove is formed in a bottom plate of the base. The static iron core is fixed in the fixing groove in an interference mode through a buffer piece. According to the installation structure of the static iron core, the static iron core does not need to be in direct contact with the base, the buffer piece on the static iron core and the fixing groove of the base are mutually extruded and tightly matched, installation is more convenient, stability is high, the buffer piece plays a role in buffering and damping the static iron core, and the static iron core is prevented from shaking due to impact of the movable iron core.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus field, concretely relates to a static iron core's mounting structure. BACKGROUND

[0002] The electromagnetic system is the key part in low voltage electrical apparatus such as contactor, and is mainly used for controlling the opening and closing of contact, thereby realizing the on-off of control circuit. The static iron core in the existing electromagnetic system has the problems of inconvenient installation and instability. CONTENT OF UTILITY MODEL

[0003] The utility model discloses a static iron core's mounting structure.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The mounting structure of static iron core, including static iron core and base, still include buffer piece, the buffer piece is fixed on the bottom side outside of static iron core, the buffer piece is set up the support flange for supporting static iron core on the side of static iron core, the bottom plate of base is equipped with fixed slot, and static iron core is fixed in fixed slot through buffer piece.

[0006] Optionally, the buffer piece is connected with the buckle between the base, the fixed buckle is equipped on the side wall of fixed slot, the fixed buckle is equipped on the top surface of buffer piece and cooperates with the fixed buckle, and the fixed buckle is buckled in the fixed buckle.

[0007] Optionally, the top surface of fixed buckle is equipped with guide inclined plane, and the bottom surface of buffer piece is equipped with cooperation inclined plane opposite to fixed buckle and cooperating with guide inclined plane.

[0008] Optionally, two buffer pieces are arranged, and the two buffer pieces are symmetrically arranged on the two sides of static iron core.

[0009] Optionally, the static iron core is fixed with the buffer piece through the fixed shaft, and the fixed shaft is arranged through the bottom side of static iron core; and the fixed hole matched with the fixed shaft is arranged on the buffer piece.

[0010] Optionally, the buffer piece is straight block structure.

[0011] Optionally, the buffer piece is higher than the bottom side of static iron core, and the buffer piece top is equipped with the support plane for supporting coil framework.

[0012] Optionally, the static iron core is square frame structure, surrounds and forms mounting through cavity, and the top edge frame of static iron core is equipped with cavity mouth, so that the top edge frame of static iron core is divided into two limit parts on the two sides of cavity mouth, and the two limit parts are respectively protruded and extended from the two side top of static iron core to the inside of mounting through cavity and are spaced apart to form the cavity mouth.

[0013] The mounting structure of the static iron core of the utility model, the static iron core does not need to contact the base directly, through the buffer piece on the static iron core and the fixed slot of the base are extruded closely, install more convenient and high stability, the buffer piece plays the role of buffering and shock absorption to the static iron core, prevent the static iron core from shaking due to the impact of the moving iron core.

[0014] In addition, the buffer piece and the base are buckled, which is convenient to install and improves the stability of installation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the assembly drawing of the electromagnetic system and the base of the utility model;

[0016] Figure 2 It is the assembly drawing of the moving and static iron core, the buffer piece and the coil framework of the utility model;

[0017] Figure 3 It is the exploded view of the moving and static iron core, the buffer piece and the coil framework of the utility model;

[0018] Figure 4 It is the sectional view of the electromagnetic system and the base of the utility model;

[0019] Figure 5 It is another sectional view of the electromagnetic system and the base of the utility model;

[0020] Figure 6 It is the structural schematic view of the base of the utility model.

[0021] Circuit board 1;Switching switch 2;Fixed bolt 20;Top flange 21;Static iron core 3;Fixed shaft 30;Installation through cavity 31;Cavity mouth 32;Limiting part 33;Moving iron core 4;Coil 5;Coil framework 6;Through hole 61;Limiting boss 62;Insert slot 63;Wire outlet 64;Limiting recess 65;Buffer piece 7;Fixed clamping port 71;Matching inclined surface 72;Fixed hole 73;Support flange 74;Base 8;Fixed slot 81;Fixed buckle 82;Guide inclined surface 821;First limiting protrusion 83;Second limiting protrusion 84;Limiting column 85;Limiting slot 86;Reinforcing rib 87. DETAILED DESCRIPTION

[0022] The following embodiment is further illustrated in the drawings, and the specific implementation of the mounting structure of the static iron core of the utility model is described. The mounting structure of the static iron core of the utility model is not limited to the description of the following embodiment.

[0023] As Figure 1As shown, the low-voltage electric appliance usually comprises an electromagnetic system, and the low-voltage electric appliance can be a contactor or a circuit breaker. Taking the contactor as an example, the contactor usually comprises a shell, an electromagnetic system installed in the shell, a contact support and a normally open contact point, the normally open contact point comprises a movable contact and a fixed contact arranged oppositely, and the shell usually comprises a base 8, a base plate and an upper cover which are stacked in sequence and fixed together. The electromagnetic system comprises a circuit board 1, a change-over switch 2, a fixed core 3, a movable core 4, a coil 5 and a coil skeleton 6. The movable contact is installed on the contact support, and the contact support is connected with the movable core 4 and arranged to move synchronously. It should be noted that the working principle of the electromagnetic system is the prior art. The coil 5 comprises a starting winding and a holding winding, the circuit board 1 supplies power to the coil 5 through the change-over switch 2, and the movable core 4 triggers the change-over switch 2 to switch to supply power to only the holding winding of the coil 5 after being attracted to the fixed core 3, so as to reduce power consumption. When the circuit board 1 receives a voltage signal, the coil 5 is powered on, i.e. the starting winding is powered on or the starting winding and the holding winding are powered on at the same time, to drive the movable core 4 to move, so that the movable core 4 is attracted to the fixed core 3, thereby the contact support is synchronously driven by the movable core 4, so that the movable contact and the fixed contact are in contact, i.e. the normally open contact point is closed, and at the same time, the movable core 4 gradually presses the change-over switch 2 in the process of being attracted to the fixed core 3, and after being attracted to the fixed core 3, the movable core 4 triggers the change-over switch 2 to switch the starting winding to only the holding winding to be powered on, without supplying power to the starting winding, so as to reduce the power consumption of the electromagnetic system; when the coil 5 is powered off, the movable core 4 is repelled from the fixed core 3, thereby the contact support is synchronously driven by the movable core 4, so that the movable contact and the fixed contact are separated, i.e. the normally open contact point is opened. The contactor can also be provided with only a normally closed contact point, or can be provided with both the normally open contact point and the normally closed contact point, and the normally closed contact point refers to being opened when the coil 5 is powered on and being closed when the coil 5 is powered off, which is the prior art and will not be described here.

[0024] For example, as Figure 1 and Figure 2As shown, the circuit board 1, the changeover switch 2, and the stationary iron core 3 are sequentially fixed within the base 8 along its length. The circuit board 1 and the changeover switch 2 are vertically inserted into the base 8. The planes of the circuit board 1 and the changeover switch 2 are perpendicular to the bottom plate of the base 8 and parallel to the sidewalls of the base 8 in its width direction. The stationary iron core 3 has a mounting cavity 31, and the top wall of the mounting cavity 31 has an opening 32. The coil frame 6 is placed within the mounting cavity 31, and at least part of the coil frame 6 extends out of the mounting cavity 31 in the width direction of the base 8. The portion of the coil frame 6 extending out of the mounting cavity 31 is fitted with the base 8. The coil frame 6 has a through hole 61 extending through the coil frame 6 along the height direction of the base 8. The coil 5 is wound on the coil frame 6. The moving iron core 4 is positioned above the stationary iron core 3, and at least part of the moving iron core 4 extends into the through hole 61 of the coil frame 6 through the opening 32. It should be noted that the length direction of the base 8 refers to... Figure 4 The width direction of base 8 refers to the vertical direction of the drawing. Figure 4 The left-right direction, the height direction of base 8 refers to Figure 4 Up and down direction.

[0025] In this embodiment of the electromagnetic system, the vertical circuit board 1, the vertical changeover switch 2, and the stationary iron core 3 are sequentially fixed inside the base 8. The coil frame 6, with the coil 5 wound around it, is installed inside the stationary iron core 3 and is horizontally limited to the base 8. The moving iron core 4, located above the stationary iron core 3, extends into the coil frame 6. The structure is simple, the layout is compact and orderly, the overall size is small, there are fewer parts, and the installation is more convenient, which can reduce costs and enhance the convenience of use and the reliability of performance. Moreover, instead of the traditional circuit board 1 and changeover switch 2 being connected to the coil frame 6, the coil frame 6 in this embodiment is set separately from the circuit board 1 and changeover switch 2, which simplifies the structure of the coil frame 6, thereby achieving a smaller size and reducing weight.

[0026] like Figures 2-4 As shown, the mounting structure of the stationary iron core 3 in this embodiment also includes a buffer member 7. The buffer member 7 is fixed on the outer side of the bottom edge of the stationary iron core 3 (i.e., the bottom wall of the mounting cavity 31). The buffer member 7 has a protruding support flange 74 on the side facing the stationary iron core 3 for supporting the stationary iron core 3. The base plate of the base 8 has a fixing groove 81. The stationary iron core 3 is interference-fitted in the fixing groove 81 by the buffer member 7. The stationary iron core 3 does not need to be in direct contact with the base 8. The buffer member 7 on the stationary iron core 3 and the fixing groove 81 of the base 8 are pressed together tightly, making the installation more convenient and the stability higher. The buffer member 7 plays a role in buffering and shock absorption for the stationary iron core 3, preventing the stationary iron core 3 from shaking due to the impact of the moving iron core 4.

[0027] like Figures 2-4As shown, the buffer component 7 and the base 8 are connected by a snap-fit ​​connection. A fixing buckle 82 is provided on the side wall of the fixing groove 81, and a fixing slot 71 that mates with the fixing buckle 82 is provided on the top surface of the buffer component 7. The fixing buckle 82 of the base 8 is fastened into the fixing slot 71 of the buffer component 7, meaning the fixing buckle 82 acts as an upper limit for the buffer component 7. The snap-fit ​​connection between the buffer component 7 and the base 8 facilitates installation and improves installation stability. Of course, the fixing buckle 82 and the fixing slot 71 can also be an interference fit, a flexible snap-fit, etc.

[0028] Furthermore, the top surface of the fixing buckle 82 is provided with a guide slope 821, and the bottom surface of the buffer member 7 is provided with a mating slope 72 that is opposite to the fixing slot 71 and cooperates with the guide slope 821. The mating slope 72 on the bottom surface of the buffer member 7 cooperates with the guide slope 821 on the top surface of the fixing buckle 82, making it easier for the buffer member 7 to be installed into the fixing groove 81 of the base 8.

[0029] like Figure 2 and Figure 3 As shown in the figure, the fixing structure between the stationary iron core 3 and the buffer member 7 in this embodiment is such that the stationary iron core 3 is fixed to the buffer member 7 by a fixing shaft 30, which is arranged through the bottom edge of the stationary iron core 3 along the width direction of the base 8. The electromagnetic system is provided with two buffer members 7, which are symmetrically arranged on both sides of the stationary iron core 3. Each buffer member 7 has a fixing hole 73 that mates with the fixing shaft 30, and the end of the fixing shaft 30 is inserted into the fixing hole 73. The fixing shaft 30 mates with the fixing hole 73 of the buffer member 7, which serves as a guide for installation and also fixes the buffer member 7 to the stationary iron core 3, ensuring a tight fit with the base 8. In this embodiment, the fixing shaft 30 is an independent shaft. Of course, in other embodiments, the fixing shaft 30 can also be integrally set with the stationary iron core 3.

[0030] like Figure 3 As shown, the buffer 7 is a straight block structure extending along the length of the base 8. The buffer 7 has a simple structure and is easy to manufacture. Of course, as another embodiment, the buffer 7 can also be a U-shaped structure that wraps around the bottom edge of the stationary iron core 3.

[0031] like Figure 2 and Figure 3 As shown, the buffer 7 is higher than the bottom edge of the stationary iron core 3 (i.e., the bottom wall of the mounting cavity 31), and the top of the buffer 7 is provided with a supporting plane for supporting the coil frame 6. The buffer 7 acts as a lower limit for the coil frame 6, improving the installation stability of the coil frame 6.

[0032] like Figure 2As shown, the stationary iron core 3 has a square frame structure, forming the mounting cavity 31. The top wall of the mounting cavity 31 refers to the top edge of the stationary iron core 3, and the bottom wall refers to the bottom edge of the stationary iron core 3. The top edge of the stationary iron core 3 has an opening 32, dividing the top edge of the stationary iron core 3 into two limiting parts 33 located on both sides of the opening 32. That is, the two limiting parts 33 extend from the top of both sides of the stationary iron core 3 toward the inside of the mounting cavity 31 and are spaced apart to form the opening 32. The limiting parts 33 limit the top surface of the coil frame 6, and the top surface of the coil frame 6 has a limiting boss 62. The limiting boss 62 and the limiting part 33 are upper limit engaged in the width direction of the base 8. The limiting parts 33 of the stationary iron core 3 play the role of upper limit and horizontal limit for the coil frame 6, so that the coil frame 6 can be quickly and stably installed into the mounting cavity 31 of the stationary iron core 3.

[0033] like Figure 2 As shown, a slot 63 is horizontally provided on one side of the top of the coil frame 6, and a downwardly extending outlet 64 is provided on the side wall of the slot 63. Enamelled wire is wound around the coil frame 6 to form a coil 5. One end of the enamelled wire is located in the slot 63 through the outlet 64, so that the coil frame 6 and the circuit board 1 are connected by quick plug-in connection using terminals. At least part of the terminals can be inserted into the slot 63 to make contact with the coil 5 and achieve electrical connection. The terminals can be plate-shaped or needle-shaped. The enamelled wire extends out from the outlet 64 and is wound around the plate-shaped or needle-shaped terminals, and the terminals are inserted into the slot 63.

[0034] like Figure 2 As shown, the top surface of the coil frame 6 is provided with a limiting groove 65, the base is placed on the top surface of the coil frame 6, and the bottom surface of the base is provided with a limiting protrusion that cooperates with the limiting groove 65. The limiting groove 65 and the limiting protrusion cooperate to prevent the coil frame 6 from shaking up and down. For example, four limiting grooves 65 are provided, and the four limiting grooves 65 are distributed at four corners on the top surface of the coil frame 6; correspondingly, four limiting protrusions are provided.

[0035] like Figure 6As shown, in this embodiment, the horizontal limiting fit structure between the coil frame 6 and the base 8 has at least two first limiting protrusions 83 and at least two second limiting protrusions 84 protruding upwards from the bottom plate of the base 8. The two first limiting protrusions 83 are spaced apart and opposite to each other along the length direction of the base 8, and the two second limiting protrusions 84 are spaced apart and opposite to each other along the width direction of the base 8. The coil frame 6 is limited between the two first limiting protrusions 83 and the two second limiting protrusions 84. During installation, the coil frame 6 is first pressed tightly together with the buffer 7 below and the stationary iron core 3 limiting part 33 above by the buffer 7 below and the stationary iron core 3 above; then it is installed into the base 8 as a whole. The first limiting protrusion 83 and the second limiting protrusion 84 are set to prevent the coil frame 6 from shifting horizontally, thereby improving the installation stability of the coil frame 6 and ensuring that the coil frame 6 and the stationary iron core 3 are tightly assembled without loosening. Moreover, the coil frame 6 is limited in the horizontal direction by the limiting protrusion on the base 8. The coil frame 6 does not need to be set with a limiting structure. The coil frame 6 only has a simple winding post and a slot 63, which simplifies the structure.

[0036] Preferably, the first limiting protrusion 83 is a boss structure; the second limiting protrusion 84 is a column structure.

[0037] For example, the base plate of the base 8 is provided with four first limiting protrusions 83 and four second limiting protrusions 84 protruding upwards respectively. Every two first limiting protrusions 83 are arranged opposite each other at intervals along the length direction of the base 8, and every two second limiting protrusions 84 are arranged opposite each other at intervals along the width direction of the base 8.

[0038] like Figure 5 and Figure 6 As shown in the figure, the installation structure between the changeover switch 2 and the base 8 in this embodiment has two upward-protruding limiting posts 85 on the bottom plate of the base 8. The two limiting posts 85 are spaced apart and opposite to each other along the width direction of the base 8. The bottom of the changeover switch 2 is limited between the two limiting posts 85. The top center of the changeover switch 2 has a driving part. The top sides of the changeover switch 2 have top flanges 21 that protrude outwards away from the driving part. The top flanges 21 of the changeover switch 2 rest on the limiting posts 85. The moving iron core 4 presses down on the driving part of the changeover switch 2 to switch the signal of the changeover switch 2, switching from supplying power to the starting winding of the coil 5 to supplying power only to the holding winding, thereby reducing the power consumption of the electromagnetic system. The changeover switch 2 is easy to install and replace.

[0039] Furthermore, a limiting groove 86 is provided on the top surface of the limiting column 85, and the upper limit of the top flange 21 of the changeover switch 2 in the length direction of the base 8 is located within the limiting groove 86; the top flange 21 of the changeover switch 2 is fixed to the limiting column 85 by fixing bolts 20. The changeover switch 2 sits directly on the base 8 vertically through the limiting column 85, is positioned by the limiting groove 86, and is then tightened by the fixing bolts 20, improving the installation stability of the changeover switch 2. Of course, the changeover switch 2 can also be fixed by using limiting buckles and pressure plates. In this embodiment, the limiting and fixing structure between the changeover switch 2 and the base 8 can be a limiting groove 86 that cooperates with the limiting of the top flange 21, or a fixing bolt 20 that fixes the top flange 21 to the limiting column 85, or both a limiting groove 86 and a fixing bolt 20 can be provided.

[0040] Preferably, a reinforcing rib 87 is provided between the outer side of the limiting column 85 and the bottom plate of the base 8 to reinforce the limiting column 85 and prevent deformation. Of course, the reinforcing rib 87 can also be connected between the outer side of the limiting column 85 and the side wall of the base 8.

[0041] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0042] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An installation structure for a stationary iron core, comprising a stationary iron core (3) and a base (8), characterized in that: It also includes a buffer (7), which is fixed on the outer side of the bottom edge of the stationary iron core (3). The buffer (7) has a support flange (74) for supporting the stationary iron core (3) on the side facing the stationary iron core (3). The base plate of the base (8) is provided with a fixing groove (81), and the stationary iron core (3) is interference-fixed in the fixing groove (81) by the buffer (7).

2. The mounting structure of the stationary iron core according to claim 1, characterized in that: The buffer (7) is snapped together with the base (8). The side wall of the fixing groove (81) is provided with a fixing buckle (82). The top surface of the buffer (7) is provided with a fixing slot (71) that cooperates with the fixing buckle (82). The fixing buckle (82) is fastened in the fixing slot (71).

3. The mounting structure of the stationary iron core according to claim 2, characterized in that: The top surface of the fixing buckle (82) is provided with a guide slope (821), and the bottom surface of the buffer (7) is provided with a mating slope (72) that is opposite to the fixing buckle (71) and cooperates with the guide slope (821).

4. The mounting structure of the stationary iron core according to claim 1, characterized in that: Two buffer components (7) are provided, which are symmetrically arranged on both sides of the stationary iron core (3).

5. The mounting structure of the stationary iron core according to claim 4, characterized in that: The stationary iron core (3) is fixed to the buffer member (7) by a fixed shaft (30), and the fixed shaft (30) is provided through the bottom edge of the stationary iron core (3); the buffer member (7) is provided with a fixing hole (73) that cooperates with the fixed shaft (30).

6. The mounting structure of the stationary iron core according to claim 1, characterized in that: The buffer (7) has a straight block structure.

7. The mounting structure of the stationary iron core according to claim 1, characterized in that: The buffer (7) is higher than the bottom edge of the stationary iron core (3), and the top of the buffer (7) is provided with a support plane for supporting the coil frame (6).

8. The mounting structure of the stationary iron core according to claim 1, characterized in that: The stationary iron core (3) is a square frame structure that forms an installation cavity (31). The top edge of the stationary iron core (3) has an opening (32), which divides the top edge of the stationary iron core (3) into two limiting parts (33) located on both sides of the opening (32). The two limiting parts (33) extend from the top of both sides of the stationary iron core (3) toward the inside of the installation cavity (31) and are spaced apart to form the opening (32).

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