Enhanced Transmission Mechanism of Non-sealed DC Contactor

Abstract

The present invention provides an enhanced drive mechanism for a non-sealed DC contactor; it includes a housing, an end cover, a coil, a coil bobbin, an upper yoke, a lower yoke, terminals, a moving iron core and a spring; a cavity is provided inside the housing, the end cover is arranged at the opening of the housing, the coil bobbin is placed inside the cavity, the coil is wound around the side wall of the coil bobbin, and an installation through hole is formed inside the coil bobbin; the upper yoke is arranged above the coil bobbin, the lower end of the upper yoke extends into the installation through hole of the coil bobbin, a two-stage stepped hole is formed inside the upper yoke, and the second-stage hole at the lower side position of the two-stage stepped hole cooperates with the terminal; the lower yoke is arranged below the coil bobbin, the upper end of the lower yoke extends into the installation through hole of the coil bobbin, the moving iron core extends into the installation through hole of the coil bobbin, and the spring abuts against the terminal and the moving iron core respectively. This drive mechanism is applicable to non-sealed explosion-proof DC contactors, and can ensure the firmness and mechanical strength of its overall structure while ensuring the overall performance indicators of the product.

Description

Technical Field

[0001] The present invention relates to an enhanced drive mechanism for a non-sealed DC contactor. Background Art

[0002] In recent years, the country has strongly advocated the development of new energy vehicles. Batteries, electronic controls, and corresponding supporting parts have developed rapidly, and the development of DC contactors has been particularly prominent. Currently, there are mainly two types of products on the market: Tyco epoxy seals and Panasonic ceramic seals, both of which are sealed structures. However, the sealed structure has complex processes, requires a lot of production equipment, high production costs, and there are potential safety hazards such as explosions. At present, there is no DC contactor with a non-sealed structure, nor a dedicated drive mechanism for non-sealed DC contactors. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an enhanced drive mechanism for a non-sealed DC contactor that enhances the firmness and mechanical strength of the product.

[0004] To solve the above technical problem, the present invention provides an enhanced drive mechanism for a non-sealed DC contactor;

[0005] It includes a housing, an end cover, a coil, a coil bobbin, an upper yoke, a lower yoke, a terminal, a moving iron core, and a spring;

[0006] A cavity is provided inside the housing, the upper end of the housing is open, the end cover is provided at the opening of the housing, the coil bobbin is placed inside the cavity, the coil is wound around the side wall of the coil bobbin, and an installation through hole penetrating the upper and lower end faces thereof is opened inside the coil bobbin;

[0007] The upper yoke is provided above the coil bobbin, the upper end face of the upper yoke penetrates the end cover and extends to the upper end face of the end cover, the lower end of the upper yoke extends into the installation through hole of the coil bobbin, a two-stage stepped hole penetrating the upper and lower end faces thereof is opened inside the upper yoke, the two-stage stepped hole includes a first-stage hole and a second-stage hole, the second-stage hole at the lower side is matched with the terminal, the second-stage hole allows the terminal to move up and down reciprocally, and the diameter of the first-stage hole is smaller than the maximum diameter of the terminal;

[0008] The lower yoke is provided below the coil bobbin, the lower end face of the lower yoke penetrates the housing and extends to the lower end face of the housing, the upper end of the lower yoke extends into the installation through hole of the coil bobbin, the moving iron core penetrates the lower yoke and extends into the installation through hole of the coil bobbin, the upper end of the spring abuts against the terminal, and the lower end of the spring abuts against the moving iron core.

[0009] After adopting such a structure, the enhanced drive mechanism of the non-sealed DC contactor of the present invention is applicable to non-sealed explosion-proof DC contactors, and while ensuring the overall performance indicators of the product, it can also ensure the firmness and mechanical strength of its overall structure.

[0010] To better understand the technical content of the present invention, hereinafter, the enhanced drive mechanism of this unsealed DC contactor will be simply referred to as this drive mechanism.

[0011] On the upper end face of the coil bobbin of this drive mechanism, several first bobbin bosses extend, and the first bobbin bosses abut against the upper yoke; on the lower end face of the coil bobbin, several second bobbin bosses extend, and the second bobbin bosses abut against the lower yoke; after adopting such a structure, by increasing the first bobbin bosses and the second bobbin bosses to control the height of the coil bobbin, on the premise of ensuring the indexes such as the stroke, spacing, and overtravel of this drive mechanism, the firmness and mechanical strength of the product are increased, the failure rate of the product is reduced, the qualified rate of the product is improved, the production cost is reduced compared with the traditional contactor, the processes are reduced, and the process equipment is reduced.

[0012] On the side wall of the installation through hole of this drive mechanism, a limiting boss extends inward, the length direction of the limiting boss is consistent with the axial direction of the installation through hole, and a limiting groove matching with the limiting boss is opened on the outer wall of the upper yoke; after adopting such a structure, the limiting boss and the limiting groove cooperate to prevent the relative circumferential rotation between the upper yoke and the coil bobbin bracket. Description of the Drawings

[0013] Figure 1 is the use state of the embodiment of this drive mechanism.

[0014] Figure 2 is the cross-sectional view of the front view of the embodiment of this drive mechanism.

[0015] Figure 3 is the three-dimensional view of the coil bobbin of the embodiment of this drive mechanism.

[0016] Figure 4 is the cross-sectional view of the front view of the coil bobbin of the embodiment of this drive mechanism. Detailed Embodiment

[0017] As Figures 1 to 4 shown (in order to more clearly show the technical content of this application, Figure 1 and Figure 2 the coil is omitted).

[0018] This drive mechanism includes a housing 1, an end cover 2, a coil, a coil bobbin 3, an upper yoke 4, a lower yoke 5, terminals 61, a moving iron core 62, and a spring 63.

[0019] The housing 1 is generally rectangular parallelepiped-shaped. A cavity 11 is provided inside the housing 1. The upper end of the housing 1 is open, and an end cover 2 is arranged at the opening of the housing 1. A coil bobbin 3 is placed inside the cavity 11. A notch 35 for cooperating with the coil is formed on the side wall of the coil bobbin 3, and the coil is wound inside the notch 35 of the coil bobbin 3. An installation through hole 31 penetrating the upper and lower end faces thereof is formed inside the coil bobbin 3, and grooves for cooperating with an upper yoke 4 and a lower yoke 5 are respectively formed on the upper and lower end faces of the coil bobbin 3.

[0020] The upper yoke 4 is arranged above the coil bobbin 3. The upper end face of the upper yoke 4 penetrates through the end cover 2 and extends to the upper end face of the end cover 2. The middle part of the upper yoke 4 is placed in the groove on the upper end face of the coil bobbin 3, and the lower end of the upper yoke 4 extends into the installation through hole 31 of the coil bobbin 3. A two-stage stepped hole penetrating its upper and lower end faces is formed inside the upper yoke 4. The two-stage stepped hole includes a first-stage hole 41 and a second-stage hole 42. The second-stage hole 42 at the lower side cooperates with a terminal 61, and the second-stage hole 42 allows the terminal 61 to move up and down reciprocally. The aperture of the first-stage hole 41 is smaller than the maximum diameter of the terminal 61.

[0021] The lower yoke 5 is arranged below the coil bobbin 3. The lower end face of the lower yoke 5 penetrates through the housing 1 and extends to the lower end face of the housing 1. The middle part of the lower yoke 5 is placed in the groove on the lower end face of the coil bobbin 3, and the upper end of the lower yoke 5 extends into the installation through hole 31 of the coil bobbin 3. A moving iron core 62 penetrates through the lower yoke 5 and extends into the installation through hole 31 of the coil bobbin 3. The upper end of a spring 63 abuts against the terminal 61, and the lower end of the spring 63 abuts against the moving iron core 62.

[0022] Three first bobbin bosses 32 extend from the upper end face of the coil bobbin 3, and the first bobbin bosses 32 abut against the upper yoke 4. Three second bobbin bosses 33 extend from the lower end face of the coil bobbin 3, and the second bobbin bosses 33 abut against the lower yoke 5.

[0023] A limiting boss 34 extends inward from the side wall of the installation through hole 31. The length direction of the limiting boss 34 is consistent with the axial direction of the installation through hole 31. A limiting groove (not shown in the figure) for cooperating with the limiting boss 34 is formed on the outer wall of the upper yoke 4.

[0024] After assembly, each component such as the housing 1, the end cover 2, the coil, the coil bobbin 3, the upper yoke 4, and the lower yoke 5 is fixed. The mounting base 7 of the DC contactor is pressed and fixed in place against this transmission mechanism by a hand press.

[0025] During this process, the first bobbin bosses 32 and the second bobbin bosses 33 of the coil bobbin 3 are forced to contact the upper yoke 4 and the lower yoke 5, and the first bobbin bosses 32 and the second bobbin bosses 33 are squeezed and deformed to control the height of the coil bobbin 3, thereby increasing the firmness and mechanical strength of the product on the premise of ensuring indexes such as the stroke, spacing, and overtravel of this transmission mechanism.

[0026] Due to the first frame boss 32 and the second frame boss 33 of the coil frame 3, the distance between the buckle of the shell 1 and the mounting seat 7 of the DC contactor will be increased, which not only ensures the design of the total stroke, spacing, and overtravel of the product, but also ensures the overall strength of the product. If the coil frame 3 does not have such a structural design, and the mounting seat 7 of the DC contactor is an injection molded part, it is very difficult to ensure its tolerance. The shell 1 of this transmission mechanism is a stamping part of DT4C material and is very easy to deform. When the production of one part of the shell 1 of this transmission mechanism and the mounting seat 7 of the DC contactor is biased, or the cumulative error is biased, the overall assembly of the product will cause the coil frame 3 to be suspended, unable to be fixed, and shake. At the same time, the stroke, overtravel, and spacing of the entire product will deviate from the designed tolerance range, and the overall product indicators will be seriously affected.

[0027] The above is only one embodiment of the present invention. It should be pointed out that a person skilled in the art may make several modifications and improvements without departing from the principle of the present invention, and these should also be regarded as falling within the scope of protection of the present invention.

Claims

1. An enhanced drive mechanism for a non-sealed DC contactor, characterized in that: It includes a housing, an end cover, a coil, a coil bobbin, an upper yoke, a lower yoke, terminals, a moving iron core and a spring; A cavity is provided inside the housing, the upper end of the housing is open, the end cover is arranged at the opening of the housing, the coil bobbin is placed inside the cavity, the coil is wound on the side wall of the coil bobbin, and an installation through hole penetrating its upper and lower end faces is opened inside the coil bobbin; The upper yoke is arranged above the coil bobbin, the upper end face of the upper yoke penetrates the end cover and extends to the upper end face of the end cover, the lower end of the upper yoke extends into the installation through hole of the coil bobbin, a two-stage stepped hole penetrating its upper and lower end faces is opened inside the upper yoke, the two-stage stepped hole includes a first-stage hole and a second-stage hole, the second-stage hole at the lower side is matched with the terminal, the second-stage hole allows the terminal to move up and down reciprocally, and the aperture of the first-stage hole is smaller than the maximum diameter of the terminal; The lower yoke is arranged below the coil bobbin, the lower end face of the lower yoke penetrates the housing and extends to the lower end face of the housing, the upper end of the lower yoke extends into the installation through hole of the coil bobbin, the moving iron core penetrates the lower yoke and extends into the installation through hole of the coil bobbin, the upper end of the spring abuts against the terminal, and the lower end of the spring abuts against the moving iron core; A plurality of first bobbin bosses extend from the upper end face of the coil bobbin, and the first bobbin bosses abut against the upper yoke; a plurality of second bobbin bosses extend from the lower end face of the coil bobbin, and the second bobbin bosses abut against the lower yoke; A limiting boss extends from the side wall of the installation through hole towards the inner side, the length direction of the limiting boss is consistent with the axial direction of the installation through hole, and a limiting groove matched with the limiting boss is opened on the outer wall of the upper yoke.

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