Contact assembly of direct current contactor

Abstract

The utility model relates to the technical field of direct current contactors, and particularly provides a direct current contactor contact assembly which comprises a static contact, a movable contact, an auxiliary reed and a shaft. Comprising a contact support, a contact pressure spring is arranged in the contact support, and a movable contact is arranged at the upper end of the contact pressure spring; the shaft is arranged at the lower end of the contact support; comprising an insulating base, and the auxiliary reed is arranged at the upper end of the insulating base; the upper end of the contact support is simultaneously provided with an inverted T-shaped groove and a circular groove. An inverted T-shaped table and a positioning column are arranged at the lower end of the insulating seat at the same time; the contact support structure of the contact assembly is optimally designed, assembling and splicing of metal parts are omitted, the contact support is designed to be of an integrated frame structure, the overall structure is simple, and use is convenient; and a boss and a raised line are arranged in the frame structure of the contact support to reliably assemble the contact pressure spring and the upper armature, so that the action reliability of the contact assembly is improved.

Description

Technical Field

[0001] This utility model relates to the field of DC contactor technology, and specifically to a DC contactor contact assembly. Background Technology

[0002] Auxiliary signal components, commonly referred to in the market as auxiliary contacts, auxiliary points, or auxiliary switches, are moving parts in a DC contactor. They move upward together with the moving contact. When the moving contact is connected to the stationary contact (i.e., the main circuit is connected), the auxiliary contact makes contact with the auxiliary connector to conduct, thus providing a feedback signal that the main circuit of the DC contactor is conducting.

[0003] Currently, the assembly structure of contact assemblies with auxiliary contacts on the market is relatively complex. Please refer to [link / reference]. Figure 2 The contact bracket is assembled from various metal and plastic parts by riveting and inserting, which is complicated to assemble and inconvenient to use. Furthermore, the insulating base mounted on the contact bracket will be in direct contact with the moving contact. When the DC contactor carries a large current for a long time, the heat generated by the moving contact will be directly conducted to the insulating base, causing damage to the auxiliary contacts and affecting their working performance and service life. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a DC contactor contact assembly to solve the problems of complex assembly of spliced ​​contact brackets and direct contact between the insulating base and the moving contact piece, which leads to heat transmission and damage to the auxiliary contacts in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides a DC contactor contact assembly, including a stationary contact, a moving contact, a contact spring, an auxiliary spring, and a shaft; it also includes a contact bracket and an insulating base, wherein the moving contact, the contact spring, and the shaft are all mounted on the contact bracket, and the auxiliary spring is mounted on the insulating base;

[0006] The contact support is designed as an integrated frame structure, with the contact spring installed in the contact support and the moving contact installed on the upper end of the contact spring. The upper end of the contact support is provided with a clearance hole and the lower end is provided with a mounting hole. The upper end of the shaft passes through the mounting hole and is fixed to the lower end of the contact support by riveting.

[0007] The upper end of the contact bracket is provided with an inverted T-shaped groove extending laterally and a circular groove extending longitudinally; the lower end of the insulating seat is provided with an inverted T-shaped platform and a positioning post. The insulating seat is inserted into the inverted T-shaped groove through the inverted T-shaped platform and the positioning post is pressed into the circular groove to assemble relative to the contact bracket.

[0008] In one embodiment of the present invention, a boss is provided at the lower inner end of the contact bracket, and the lower end of the contact compression spring is sleeved on the outer side of the boss.

[0009] In one embodiment of the present invention, a gasket is provided at the upper end of the boss.

[0010] In one embodiment of this utility model, the upper end of the moving contact is provided with an upper armature and the lower end is provided with a lower yoke.

[0011] In one embodiment of the present invention, the inner sides of the contact bracket are provided with protrusions, and a groove is formed between the protrusions and the upper end of the contact bracket, and the upper armature is inserted into the groove.

[0012] In one embodiment of this utility model, the lower yoke is configured as a straight line or a U-shape, and a circular groove is provided at the lower end of the lower yoke, with the upper end of the contact spring pressed into the circular groove.

[0013] In one embodiment of the present invention, two inverted T-shaped grooves are provided, the two inverted T-shaped grooves are symmetrically distributed, and a circular groove is provided between the two inverted T-shaped grooves.

[0014] In one embodiment of the present invention, the upper end of the contact support is further provided with guide ribs that extend laterally and are inclined from the outside to the inside. One end of the guide ribs extends to the upper edge of the contact support, and the other end extends to the circular groove.

[0015] As described above, the DC contactor contact assembly of this utility model has the following beneficial effects:

[0016] This invention designs the contact support as an integrated frame structure, with an inverted T-shaped groove at the top of the contact support and an inverted T-shaped platform at the bottom of the insulating base. The insulating base can be quickly assembled relative to the contact support by engaging the inverted T-shaped groove with the inverted T-shaped platform. After assembly, the insulating base is located at the upper end of the contact support and does not directly contact the moving contact. The insulating base and the contact support work together to isolate the electrical interference of the moving contact, improving the service life of the auxiliary spring. Furthermore, to prevent the insulating base and auxiliary spring from shifting after long-term operation, a positioning post is provided at the bottom of the insulating base. At the same time, a circular groove is opened at the corresponding position on the top of the contact support. After the insulating base is installed relative to the contact support, the positioning post falls into the circular groove along the guide rib, improving the reliability of the assembly of the insulating base relative to the contact support.

[0017] This invention optimizes the contact support structure of the contact assembly, eliminating the assembly and splicing of metal parts and designing the contact support as an integrated frame structure, which is simple in overall structure and easy to use; and by setting bosses and ridges in the frame structure of the contact support, the contact spring and upper armature are reliably assembled, thereby improving the reliability of the contact assembly operation. Attached Figure Description

[0018] Figure 1 The diagram shows the structure of this utility model without the upper armature, lower yoke, and contact spring.

[0019] Figure 2 The diagram shown is a structural schematic diagram disclosed in the prior art.

[0020] Figure 3 The diagram shown is a structural schematic of this utility model without the insulating base.

[0021] Figure 4 The diagram shown is a cross-sectional view of the present invention with the insulating base removed.

[0022] Figure 5 The diagram shown is an enlarged structural schematic of the contact support in this utility model.

[0023] Figure 6 The diagram shown is an enlarged structural schematic of the insulating base in this utility model.

[0024] Figure 7 Displayed as Figure 6 The main view.

[0025] Component designation explanation

[0026] 1. Static contact; 2. Moving contact; 3. Auxiliary spring; 4. Shaft; 5. Contact bracket; 51. Clearance hole; 52. Assembly hole; 53. Inverted T-slot; 54. Circular slot; 55. Boss; 56. Raised bar; 57. Guide rib; 6. Contact compression spring; 7. Insulating seat; 71. Inverted T-shaped platform; 72. Positioning post; 8. Washer; 9. Upper armature; 10. Lower yoke. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0028] Please see Figures 1 to 7 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0029] Please see Figure 1 , Figures 3-7This utility model provides a DC contactor contact assembly, including a stationary contact 1, a moving contact 2, a contact spring 6, an auxiliary spring 3, and a shaft 4; it also includes a contact support 5 and an insulating base 7. The moving contact 2, the contact spring 6, and the shaft 4 are all mounted on the contact support 5, and the auxiliary spring 3 is mounted on the insulating base 7. The insulating base 7 is mounted on the upper end of the contact support 5, and the moving contact 2 does not directly contact the insulating base 7. The insulating base 7 and the contact support 5 work together to isolate the electrical interference of the moving contact 2 and improve the service life of the auxiliary spring 3. In specific use, the shaft 4 is placed in the magnetic field surrounded by the coil in the DC contactor. When the coil is energized, the generated magnetic field causes the moving iron core to move upward, driving the shaft 4, the contact support 5, and the moving contact 2 to move and contact the stationary contact 1, and the contact closes. When the coil is de-energized, the magnetic field disappears, and under the action of the return spring, the moving iron core drives the shaft 4, the contact support 5, and the moving contact 2 to move downward, and the contact opens.

[0030] The contact support 5 is an integrated frame structure, with the contact spring 6 installed in the contact support 5 and the moving contact 2 installed on the upper end of the contact spring 6. The upper end of the contact support 5 is provided with a clearance hole 51 and the lower end is provided with a mounting hole 52. The upper end of the shaft 4 passes through the mounting hole 52 and is fixed to the lower end of the contact support 5 by riveting. The upper end of the moving contact 2 is provided with an upper armature 9 and the lower end is provided with a lower yoke 10. The lower yoke 10 is provided with a straight or U-shaped design, and the lower end of the lower yoke 10 is provided with a circular groove. The upper end of the contact spring 6 is pressed into the circular groove to ensure the stability of the movement of the moving contact 2. The two opposite ends of the inner side of the contact support 5 are provided with protrusions 56. The protrusions 56 and the upper end of the contact support 5 form a groove, and the upper armature 9 is inserted into the groove to improve the reliability of the upper armature 9 in the contact support 5.

[0031] The upper end of the contact support 5 is provided with an inverted T-shaped groove 53 extending laterally and a circular groove 54 extending longitudinally. The lower end of the insulating seat 7 is provided with an inverted T-shaped platform 71 and a positioning post 72. The insulating seat 7 is fitted into the inverted T-shaped groove 53 by the inverted T-shaped platform 71 and the positioning post 72 is pressed into the circular groove 54 to be assembled relative to the contact support 5. Specifically, two inverted T-shaped grooves 53 are provided, symmetrically distributed, and a circular groove 54 is provided between the two inverted T-shaped grooves 53; the lower end of the insulating base 7 is provided with both an inverted T-shaped platform 71 and a positioning post 72, the number of inverted T-shaped platforms 71 is the same as the number of inverted T-shaped grooves 53, and each inverted T-shaped platform 71 is inserted into one inverted T-shaped groove 53; the upper end of the contact support 5 is also provided with guide ribs 57 extending laterally and inclined from the outside to the inside, one end of the guide ribs 57 extending to the upper edge of the contact support 5 and the other end extending to the circular groove 54; the invention creates a contact The top of the bracket 5 is provided with an inverted T-shaped groove 53, and the bottom of the insulating seat 7 is provided with an inverted T-shaped platform 71. The insulating seat 7 can be quickly assembled relative to the contact bracket 5 by engaging the inverted T-shaped groove 53 with the inverted T-shaped platform 71. The assembly method is simple and convenient to use. In addition, to prevent the insulating seat 7 and the auxiliary spring 3 from shifting after long-term operation, a positioning post 72 is provided at the bottom of the insulating seat 7. At the same time, a circular groove 54 is opened at the corresponding position on the top of the contact bracket 5. After the insulating seat 7 is installed relative to the contact bracket 5, the positioning post 72 falls into the circular groove 54 along the guide rib 57, which improves the reliability of the assembly of the insulating seat 7 relative to the contact bracket 5.

[0032] The lower inner end of the contact bracket 5 is provided with a boss 55, and the upper end of the boss 55 is provided with a gasket 8; the lower end of the contact spring 6 is sleeved on the outer side of the boss 55; after the shaft 4 passes through the lower end of the contact bracket 5, the contact spring 6 is sleeved on the outer side of the boss 55, which can physically isolate the outer side and the inner side of the contact bracket 5, that is, physically isolate the high voltage and low voltage ends, prevent the high voltage end from transmitting destructive electrical signals to the low voltage end and damaging the coil assembly, and improve the safety of the contactor.

[0033] In summary, this invention optimizes the structure of the contact support 5 in the contact assembly, eliminating the assembly and splicing of metal parts and designing the contact support 5 as an integrated frame structure. This results in a simple overall structure that is easy to use. Furthermore, by setting bosses 55 and raised strips 56 within the frame structure of the contact support 5, the contact spring 6 and upper armature 9 are reliably assembled, improving the reliability of the contact assembly's operation. Therefore, this invention effectively overcomes the various shortcomings of the prior art and possesses high industrial applicability.

[0034] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A DC contactor contact assembly, including a stationary contact (1), a moving contact (2), a contact spring (6), an auxiliary spring (3), and a shaft (4); it also includes a contact bracket (5) and an insulating base (7), wherein the moving contact (2), the contact spring (6), and the shaft (4) are all mounted on the contact bracket (5), and the auxiliary spring (3) is mounted on the insulating base (7); Its features are: The contact support (5) is an integral frame structure, the contact spring (6) is installed in the contact support (5), and the moving contact (2) is installed on the upper end of the contact spring (6); the upper end of the contact support (5) is provided with a clearance hole (51) and the lower end is provided with an assembly hole (52). The upper end of the shaft (4) passes through the assembly hole (52) and is fixed to the lower end of the contact support (5) by riveting. The upper end of the contact support (5) is provided with an inverted T-shaped groove (53) extending laterally and a circular groove (54) extending longitudinally; the lower end of the insulating seat (7) is provided with an inverted T-shaped platform (71) and a positioning post (72). The insulating seat (7) is inserted into the inverted T-shaped groove (53) by the inverted T-shaped platform (71) and the positioning post (72) is pressed into the circular groove (54) to assemble relative to the contact support (5).

2. The DC contactor contact assembly according to claim 1, characterized in that: The lower inner end of the contact support (5) is provided with a boss (55), and the lower end of the contact spring (6) is sleeved on the outside of the boss (55).

3. The DC contactor contact assembly according to claim 2, characterized in that: The upper end of the boss (55) is provided with a gasket (8).

4. The DC contactor contact assembly according to claim 1, characterized in that: The moving contact (2) has an upper armature (9) at its upper end and a lower yoke (10) at its lower end.

5. The DC contactor contact assembly according to claim 4, characterized in that: The contact support (5) has protrusions (56) on both sides of its inner side. The protrusions (56) and the upper end of the contact support (5) form a groove, and the upper armature (9) is inserted into the groove.

6. The DC contactor contact assembly according to claim 4, characterized in that: The lower yoke (10) is designed in a straight line or a U-shape, and a circular groove is provided at the lower end of the lower yoke (10). The upper end of the contact spring (6) is pressed into the circular groove.

7. The DC contactor contact assembly according to claim 1, characterized in that: Two inverted T-shaped grooves (53) are provided, and the two inverted T-shaped grooves (53) are symmetrically distributed. A circular groove (54) is provided between the two inverted T-shaped grooves (53).

8. The DC contactor contact assembly according to claim 7, characterized in that: The upper end of the contact support (5) is also provided with guide ribs (57) that extend laterally and are inclined from the outside to the inside. One end of the guide ribs (57) extends to the upper edge of the contact support (5) and the other end extends to the circular groove (54).

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