Contactor static contact and fixed connection structure thereof

Abstract

The utility model discloses a contactor static contact and a fixed connection structure thereof, the contactor static contact comprises a static contact body, the top of the static contact body is provided with a threaded connection part used for being fixedly connected with an external fastener, one end of the static contact body surrounding the threaded connection part is provided with an overflow groove, and the overflow groove is provided with an overflow hole. And the overflow groove is used for accommodating the thread glue extruded when the fastener is connected with the thread connecting part. According to the utility model, the overflow groove distributed around one end of the threaded connection part is arranged on the static contact body, when a fastener is in threaded connection with the threaded connection part, the threaded glue is extruded and overflows outwards, and the overflow groove is used for accommodating the extruded and overflowed threaded glue, so that the threaded glue is prevented from overflowing to the contact surface of the static contact body, and the service life of the static contact body is prolonged. The contact reliability of the static contact body and the electric connecting piece is ensured; and meanwhile, the fastener is bonded and fixed with the static contact body through the thread glue, so that the problem that the fastener is easy to loosen is effectively solved, and the risk of electrical accidents is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a static contact of a contactor and a fixed connection structure thereof. Background Art

[0002] With the rapid development of new energy electric vehicles, the market demand for the rated voltage and current of high-voltage DC contactors is getting higher and higher. Similarly, the connection requirements between the static contacts of high-voltage DC contactors and electrical connectors such as copper busbars are also getting higher and higher. It is necessary to ensure the reliability of the connection between the static contacts and electrical connectors.

[0003] In current high-voltage DC contactors, the static contact is usually provided with a threaded hole or a threaded column, and the static contact and the electrical connector are locked and fixed by screws or nuts. Since the contactor is subject to long-term vibration during vehicle operation, the screws or nuts are prone to loosening, resulting in unstable connection and even electrical accidents. In order to solve this technical problem, the existing practice is generally to spray thread glue on the surface of the static contact or the screw or nut first, and after the screw or nut is locked with the static contact, it is further bonded and fixed by the solidified thread glue to prevent loosening. However, during the locking process of the screw or nut and the static contact, the thread glue will overflow outward due to squeezing. Once the thread glue overflows between the static contact and the electrical connector, it will cause unreliable contact. Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. Utility Model Content

[0004] The problem to be solved by the utility model is to provide a contactor static contact and a fixed connection structure thereof, so as to overcome the defect that the static contact and the electrical connector are unreliably contacted because the conventional static contact is bonded with a thread glue and a fastener.

[0005] The utility model adopts the following technical solution to solve the technical problem: a contactor static contact, comprising: a static contact body, a top of the static contact body is provided with a threaded connection part for fixed connection with an external fastener, the static contact body is provided with an overflow groove around one end of the threaded connection part, and the overflow groove is used to receive the thread glue squeezed out when the fastener is connected to the threaded connection part.

[0006] As a further improvement of the utility model, the threaded connection portion is a threaded hole recessed at the top of the stationary contact body, and the overflow groove is located at the upper end of the threaded hole.

[0007] As a further improvement of the present invention, the threaded hole is provided with a chamfer along its top edge.

[0008] As a further improvement of the utility model, the threaded connection portion is a threaded column protruding from the top of the static contact body, and the overflow groove is located at the lower end of the threaded column.

[0009] As a further improvement of the present invention, the threaded column and the static contact body are integrally formed.

[0010] As a further improvement of the present invention, the threaded column and the stationary contact body are separately processed and formed, and the threaded column is fixedly connected to the stationary contact body.

[0011] As a further improvement of the present invention, the overflow groove is annular, and its size is larger than that of the threaded connection portion.

[0012] The utility model also provides a contactor static contact fixed connection structure, comprising: an electrical connector, a fastener and the static contact body mentioned above, wherein the electrical connector is overlapped on the top of the static contact body, and the fastener is fixedly connected to the threaded connection part of the static contact body and presses the electrical connector;

[0013] Wherein, thread glue is coated on the surface of the fastener and / or the threaded connection part, and when the fastener is connected to the threaded connection part, the thread glue can be squeezed out and flow into the overflow groove of the static contact body.

[0014] As a further improvement of the utility model, the threaded connection portion is a threaded hole recessed at the top of the static contact body, and the overflow groove is located at the upper end of the threaded hole; the fastener includes a screw, which passes through the electrical connector and is fixedly connected in the threaded hole.

[0015] As a further improvement of the utility model, the threaded connection portion is a threaded column protruding from the top of the static contact body, the overflow groove is located at the lower end of the threaded column, and the electrical connector is sleeved on the threaded column; the fastener includes a nut, and the nut is fixedly connected to the threaded column.

[0016] The beneficial effects of the utility model are as follows: the utility model provides a contactor static contact and a fixed connection structure thereof, wherein an overflow groove is provided on the static contact body and is distributed around one end of the threaded connection part. When the fastener is threadedly connected to the threaded connection part, the thread glue will be squeezed and overflow outward, and the overflowing thread glue is received by the overflow groove, thereby preventing the thread glue from overflowing onto the contact surface of the static contact body, thereby ensuring the reliability of the contact between the static contact body and the electrical connection part; at the same time, the fastener is bonded and fixed to the static contact body by the thread glue, thereby effectively solving the problem of the fastener being easy to loosen and reducing the risk of electrical accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the first embodiment of the static contact of the contactor of the utility model;

[0018] Figure 2 It is a cross-sectional view of the first embodiment of the static contact of the contactor of the utility model;

[0019] Figure 3 It is a three-dimensional diagram of the second embodiment of the static contact of the contactor of the utility model;

[0020] Figure 4 It is a cross-sectional view of the second embodiment of the static contact of the contactor of the utility model;

[0021] Figure 5 It is a three-dimensional diagram of the third embodiment of the fixed connection structure of the contactor static contact of the utility model;

[0022] Figure 6 It is a cross-sectional view of the third embodiment of the fixed connection structure of the contactor static contact of the utility model;

[0023] Figure 7 It is a three-dimensional diagram of the fourth embodiment of the fixed connection structure of the contactor static contact of the utility model;

[0024] Figure 8 It is a cross-sectional view of the fourth embodiment of the fixed connection structure of the contactor static contact of the utility model.

[0025] Combined with the accompanying drawings, the following description is given:

[0026] 1. Static contact body; 101. Overflow groove; 102. Threaded hole; 1021. Chamfer; 103. Threaded column; 2. Electrical connector; 3. Screw; 4. Nut; 5. Ceramic cover. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] Embodiment 1

[0029] See also Figure 1 and Figure 2 The utility model provides a contactor static contact and a fixed connection structure thereof, comprising: a static contact body 1, the static contact body 1 can be but not limited to a cylindrical structure, and its top is exposed upward from the contactor. A threaded connection portion is provided at the top of the static contact body 1, and the threaded connection portion is used to be fixedly connected with an external fastener to achieve locking and fixing of the external electrical connector on the static contact body 1.

[0030] Furthermore, an overflow groove 101 is provided around one end of the threaded connection portion of the stationary contact body 1 .

[0031] The threaded surface of the threaded connection part and / or the fastener in the utility model is coated with thread glue. When the fastener is threadedly connected to the threaded connection part, the thread glue will be squeezed and overflow outward. The overflow groove 101 is used to receive the thread glue that is squeezed and overflowed when the fastener is connected to the threaded connection part, thereby preventing the thread glue from overflowing to the contact surface of the static contact body 1 (i.e., the top surface of the static contact body 1), thereby ensuring the reliability of the contact between the static contact body 1 and the external electrical connection. At the same time, the fastener is bonded and fixed to the static contact body 1 by the thread glue, which also effectively solves the problem of the fastener being easy to loosen and reduces the risk of electrical accidents.

[0032] In this embodiment, the threaded connection portion is specifically a threaded hole 102 recessed downwardly along the middle position of the top of the stationary contact body 1 , the lower end of the threaded hole 102 does not penetrate the stationary contact body 1 , and the overflow groove 101 is located at the upper end of the threaded hole 102 .

[0033] The overflow groove 101 is in a circular shape, and the diameter of the overflow groove 101 is larger than the diameter of the threaded hole 102 , so that the overflow groove 101 and the threaded hole 102 form a stepped hole as a whole.

[0034] See also Figure 2 The threaded hole 102 is provided with a chamfer 1021 along its top edge to serve as a guide when assembling the fastener.

[0035] Embodiment 2

[0036] The difference between this embodiment and the first embodiment is that the threaded connection part is different.

[0037] like Figure 3 and Figure 4 As shown, the threaded connection portion of the present embodiment is specifically a threaded column 103 protruding upward along the middle position of the top of the static contact body 1; the overflow groove 101 is specifically formed by a downward concave arrangement of the static contact body 1 along the top, and the overflow groove 101 is in a circular ring shape, which is distributed around the lower end of the threaded column 103 and is used to receive the threaded adhesive squeezed out when the fastener is connected to the threaded column 103, thereby preventing the threaded adhesive from overflowing onto the contact surface of the static contact body 1, thereby ensuring the reliability of the contact between the static contact body 1 and the external electrical connector.

[0038] Preferably, the outer diameter of the overflow groove 101 is greater than the outer diameter of the threaded column 103 , and the inner diameter of the overflow groove 101 is the same as the outer diameter of the threaded column 103 , so that the extruded thread glue can flow directly downward into the overflow groove 101 .

[0039] The threaded column 103 can be integrally formed with the stationary contact body 1; the threaded column 103 can also be separately formed with the stationary contact body 1, and then the threaded column 103 is fixedly connected to the stationary contact body 1, and the fixing connection method is not limited, such as brazing.

[0040] Embodiment 3

[0041] See also Figure 5 and Figure 6 The utility model also provides a fixed connection structure of a contactor static contact, comprising: an electrical connector 2, a fastener, and a static contact body 1 as described in the first embodiment. The static contact body 1 is welded to the top of the ceramic cover 5 of the contactor, and the top of the static contact body 1 is exposed upward from the ceramic cover 5; the electrical connector 2 is overlapped on the top of the static contact body 1, and the fastener is fixedly connected to the threaded connection portion of the static contact body 1 and presses the electrical connector 2.

[0042] Similarly, in this embodiment, the threaded connection portion is specifically a threaded hole 102 recessed downwardly along the middle position of the top of the static contact body 1, the lower end of the threaded hole 102 does not penetrate the static contact body 1, and the overflow groove 101 is located at the upper end of the threaded hole 102. Correspondingly, the fastener is a screw 3 matching the threaded hole 102, and the screw 3 passes through the through hole of the electrical connector 2 and is fixedly connected in the threaded hole 102.

[0043] Before assembly, first apply thread glue on the thread surface of the screw 3 or the threaded hole 102. The coating method is not limited, such as spraying; the thread glue spraying position is preferably sprayed in the middle of the thread, and the spraying method can be any one of half a circle, opposite sides, and full circumference. After the thread glue is applied, the electrical connector 2 is placed on the static contact body 1, and the electrical connector 2 and the static contact body 1 are locked and fixed by the screw 3. In this process, the thread glue is squeezed out and flows upward to the overflow groove 101 of the static contact body 1, so as to prevent the thread glue from overflowing to the contact surface of the static contact body 1, thereby ensuring the reliability of the contact between the static contact body 1 and the electrical connector 2.

[0044] Among them, thread glue can be selected from physical glue or chemical glue. Physical glue includes but is not limited to epoxy thread glue, methacrylate thread glue, etc. During the locking process, physical glue is used to fill the gap between screw threads to reduce material creep or material dynamic strain effect, thereby achieving the purpose of preventing loosening; chemical glue includes but is not limited to single-component anaerobic adhesives, etc., which are in the shape of tiny capsules. In an anaerobic environment, the capsules are broken during the locking process and the glue liquid is mixed and solidified to achieve bonding.

[0045] Embodiment 4

[0046] See also Figure 7 and Figure 8 The utility model also provides a contactor static contact fixed connection structure, comprising: an electrical connector 2, a fastener, and a static contact body 1 as described in the second embodiment. The static contact body 1 is welded to the top of the ceramic cover 5 of the contactor, and the top of the static contact body 1 is exposed upward from the ceramic cover 5.

[0047] Similarly, in this embodiment, the threaded connection part is specifically a threaded column 103 protruding upward along the middle position of the top of the static contact body 1; the overflow groove 101 is specifically formed by the static contact body 1 being concave downward along the top, and the overflow groove 101 is annular, which is distributed around the lower end of the threaded column 103 and is used to receive the thread glue that is squeezed and overflowed when the fastener is connected to the threaded column 103. Correspondingly, the fastener adopts a nut 4 that matches the threaded column 103. A through hole is provided on the electrical connector 2, and the electrical connector 2 is overlapped on the top of the static contact body 1 and is sleeved on the threaded column 103, and the nut 4 is fixedly connected to the threaded column 103 and presses the electrical connector 2.

[0048] Similar to the third embodiment, before assembly, the thread glue is first applied on the thread surface of the nut 4 or the threaded column 103; after the coating is completed, the electrical connector 2 is sleeved on the threaded column 103 and locked by the nut 4 to achieve the fixation of the electrical connector 2 and the static contact body 1. In this process, the thread glue is squeezed out by the nut 4 and the threaded column 103 and flows downward into the overflow groove 101 of the static contact body 1, thereby preventing the thread glue from overflowing onto the contact surface of the static contact body 1, and ensuring the reliability of the contact between the static contact body 1 and the electrical connector 2.

[0049] The electrical connector 2 in the present invention can be selected from but not limited to copper bars.

[0050] It can be seen that the static contact of the contactor and its fixed connection structure of the utility model are provided with an overflow groove distributed around one end of the threaded connection part on the static contact body 1. When the fastener is threadedly connected to the threaded connection part, the thread glue will be squeezed and overflow outward. The overflow groove 101 is used to receive the squeezed overflowing thread glue, thereby preventing the thread glue from overflowing onto the contact surface of the static contact body 1, thereby ensuring the reliability of the contact between the static contact body 1 and the electrical connector; at the same time, the fastener is bonded and fixed to the static contact body 1 by the thread glue, which also effectively solves the problem of the fastener being easy to loosen and reduces the risk of electrical accidents.

[0051] In the above description, many specific details are described to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person familiar with the technical field can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A contactor static contact, comprising a static contact body (1), wherein the top of the static contact body (1) is provided with a threaded connection portion for fixed connection with an external fastener, characterized in that: The static contact body (1) is provided with an overflow groove (101) around one end of the threaded connection portion, and the overflow groove (101) is used to receive thread glue squeezed out when the fastener is connected to the threaded connection portion.

2. The contactor static contact according to claim 1, characterized in that: The threaded connection portion is a threaded hole (102) recessed at the top of the stationary contact body (1), and the overflow groove (101) is located at the upper end of the threaded hole (102).

3. The contactor static contact according to claim 2, characterized in that: The threaded hole (102) is provided with a chamfer (1021) along its top edge.

4. The contactor static contact according to claim 1, characterized in that: The threaded connection portion is a threaded column (103) protruding from the top of the stationary contact body (1), and the overflow groove (101) is located at the lower end of the threaded column (103).

5. The contactor static contact according to claim 4, characterized in that: The threaded column (103) and the stationary contact body (1) are integrally formed.

6. The contactor static contact according to claim 4, characterized in that: The threaded column (103) and the stationary contact body (1) are separately processed and formed, and the threaded column (103) is fixedly connected to the stationary contact body (1).

7. The contactor static contact according to claim 1, characterized in that: The overflow groove (101) is annular, and its size is larger than that of the threaded connection portion.

8. A contactor fixed contact connection structure, characterized in that: include: An electrical connector (2), a fastener, and a stationary contact body (1) as claimed in claim 1, wherein the electrical connector (2) is overlapped on the top of the stationary contact body (1), and the fastener is fixedly connected to the threaded connection portion of the stationary contact body (1) and presses the electrical connector (2); Wherein, thread glue is coated on the surface of the fastener and / or the threaded connection part, and when the fastener is connected to the threaded connection part, the thread glue can be squeezed out and flow into the overflow groove (101) of the static contact body (1).

9. The contactor static contact fixed connection structure according to claim 8, characterized in that: The threaded connection portion is a threaded hole (102) recessed in the top of the stationary contact body (1), and the overflow groove (101) is located at the upper end of the threaded hole (102); the fastener comprises a screw (3), and the screw (3) passes through the electrical connector (2) and is fixedly connected in the threaded hole (102).

10. The contactor static contact fixed connection structure according to claim 8, characterized in that: The threaded connection portion is a threaded column (103) protruding from the top of the static contact body (1); the overflow groove (101) is located at the lower end of the threaded column (103); the electrical connector (2) is sleeved on the threaded column (103); the fastener comprises a nut (4), and the nut (4) is fixedly connected to the threaded column (103).

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