Contact arm of vacuum contactor

Abstract

The utility model relates to the field of vacuum contactors, in particular to a contact arm of a vacuum contactor, which comprises a first contact arm and a second contact arm. And the mounting plate is mounted at one end of the first contact arm and is used for being mounted with the vacuum contactor. According to the contact arm of the vacuum contactor, through the arrangement of the first contact arm, the second contact arm, the protection plate, the first heat dissipation holes, the first reinforcing frame, the adjusting mechanism and the second reinforcing frame, the overall hardness can be enhanced, the heat dissipation performance and the adjustability are also improved, the protection effect is achieved through the protection plate outside the first contact arm and the second contact arm, and the service life of the contact arm is prolonged. Meanwhile, the first reinforcing frame and the second reinforcing frame are installed in the first contact arm and the second contact arm, so that the overall strength is enhanced, bending or deformation in the using process is avoided, the first heat dissipation holes are formed in the outer portions of the first contact arm and the second contact arm, the heat dissipation effect of the first contact arm and the second contact arm can be improved, and the situation that the performance is affected due to electrification overheating is avoided.

Description

Technical Field

[0001] This utility model relates to the field of vacuum contactors, and specifically to a contact arm of a vacuum contactor. Background Technology

[0002] Vacuum contactors utilize vacuum interrupters to extinguish arcs and are used to frequently connect and disconnect normal operating currents. They are typically used for long-distance connection and disconnection of 6kV and 380V (660V, 1140V) AC motors that frequently start and stop at medium and low voltage. Vacuum contactor arms are widely used for the remote connection and disconnection of medium and low voltage motors that require frequent starting and stopping, as well as for the breaking of high-current, high-voltage circuits in power transmission and distribution systems.

[0003] The contact arms of existing vacuum contactors are mostly integrally welded, with a fixed connection distance. The contact arms can only be used in specific vacuum contactors. However, the existing contact arms themselves are not strong enough. When subjected to large mechanical stress or thermal stress generated by current, the contact arms may bend or deform. This will cause the contacts to fail to make accurate contact, increase contact resistance, affect conductivity, and also result in poor heat dissipation. When the heat dissipation is poor, the contact arms will generate a lot of heat during the energization process, which cannot be dissipated in time, causing the contact arm temperature to rise. High temperature will accelerate the oxidation and aging process of the contact arm material, leading to a decline in material performance, increased contact resistance, and further aggravating the heat generation problem.

[0004] Therefore, it is necessary to invent a contact arm for a vacuum contactor to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a contact arm for a vacuum contactor. The protective plates on the outer surfaces of the first and second contact arms not only provide protection but also enhance rigidity. Furthermore, both contact arms have internal first and second reinforcing frames, thereby strengthening the overall strength and preventing bending or deformation during use. Multiple heat dissipation holes on the outer surfaces of the first and second contact arms improve heat dissipation, preventing performance degradation due to overheating. The second contact arm slides and extends within the first contact arm via a fixed cylinder at one end, and is then fixed in place by a threaded rod and two sets of nuts. This design allows for adaptation to different working conditions and requirements, thus addressing the shortcomings of the aforementioned prior art. The existing vacuum contactors have contact arms that are mostly integrally welded, with a fixed connection distance. These contact arms can only be used with specific vacuum contactors. However, the existing contact arms themselves are not strong enough. When subjected to large mechanical stress or thermal stress generated by current, the contact arms may bend or deform. This will cause the contacts to fail to make accurate contact, increase contact resistance, and affect conductivity. At the same time, the heat dissipation effect is also poor. When the heat dissipation effect is poor, the contact arm will generate a lot of heat during the energization process, which cannot be dissipated in time, causing the contact arm temperature to rise. High temperature will accelerate the oxidation and aging process of the contact arm material, leading to a decline in material performance, increasing contact resistance, and further aggravating the heat generation problem.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a contact arm of a vacuum contactor, comprising a first contact arm and a second contact arm;

[0007] A mounting plate is installed at one end of the first contact arm for installation with the vacuum contactor. Protective plates are fixedly installed on the outside of both the first and second contact arms. Fixing blocks are fixedly connected to the lower two sides of the protective plates. First heat dissipation holes are opened on the outer surfaces of both the first and second contact arms. A first reinforcing frame is provided inside the first contact arm. Sliding grooves are opened on the inner two side surfaces of the first contact arm.

[0008] An adjustment mechanism is installed inside the first and second contact arms to adjust the length;

[0009] The second reinforcing bracket is installed inside the second contact arm to improve its strength. One end of the second contact arm has an external thread, and a mounting sleeve is connected to the external thread of the second contact arm. A contact is fixedly connected to one side of the mounting sleeve.

[0010] Preferably, the protective plate and the first heat dissipation holes are arranged in a ring array on the first contact arm and the second contact arm, and the first contact arm and the second contact arm are movably connected.

[0011] Preferably, the adjustment mechanism includes a first fixing sleeve, which is fixedly sleeved on the outside of one end of the first contact arm. A second fixing sleeve is fixedly connected to the outside end of the second contact arm. A fixing cylinder is fixedly connected inside the second fixing sleeve. Slider blocks are fixedly connected to both sides of the fixing cylinder. A second heat dissipation hole is provided on the outer surface of the fixing cylinder.

[0012] Preferably, a threaded rod is passed through the interior of both the first and second fixed sleeves, and a nut is fitted on the outer thread of the threaded rod. There are three sets of threaded rods, and two nuts are provided on the outer surface of each set of threaded rods.

[0013] Preferably, the fixed cylinder is slidably connected to the first contact arm via sliders on both sides, and the groove is used in conjunction with the sliders.

[0014] Preferably, the first reinforcing frame and the second reinforcing frame are a cross structure, and the first reinforcing frame and the second reinforcing frame and the first contact arm and the second contact arm are internally fixedly connected.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] This utility model, through the arrangement of a first contact arm, a second contact arm, a protective plate, a first heat dissipation hole, a first reinforcing frame, an adjustment mechanism, and a second reinforcing frame, not only enhances the overall rigidity but also improves heat dissipation and adjustability. The protective plate outside the first and second contact arms not only provides protection but also enhances rigidity. Furthermore, the first and second reinforcing frames are installed inside both arms, thereby strengthening the overall strength and preventing bending or deformation during use. Multiple first heat dissipation holes on the exterior of the first and second contact arms improve heat dissipation, preventing performance degradation due to overheating. The second contact arm is then extended and slidable within the first contact arm via a fixed cylinder at one end, and is then fixed in place by a threaded rod and two sets of nuts, adapting to different working conditions and requirements. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the first contact arm structure of this utility model;

[0020] Figure 3This is a schematic diagram of the adjustment mechanism structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the second contact arm structure of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. First contact arm; 2. Second contact arm; 3. Mounting plate; 4. Protective plate; 5. Fixing block; 6. First heat dissipation hole; 7. First reinforcing frame; 8. Slide groove; 9. Adjustment mechanism; 901. First fixing sleeve; 902. Second fixing sleeve; 903. Fixing cylinder; 904. Slider; 905. Second heat dissipation hole; 906. Threaded rod; 907. Nut; 10. Second reinforcing frame; 11. External thread; 12. Mounting sleeve; 13. Contact. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model provides, for example Figure 1-4 The shown is a contact arm of a vacuum contactor, including a first contact arm 1 and a second contact arm 2;

[0026] Mounting plate 3 is installed at one end of the first contact arm 1 for installation with the vacuum contactor. Protective plate 4 is fixedly installed on the outside of both the first contact arm 1 and the second contact arm 2. Fixing blocks 5 are fixedly connected to the lower two sides of the protective plate 4. First heat dissipation holes 6 are opened on the outer surface of both the first contact arm 1 and the second contact arm 2. A first reinforcing frame 7 is provided inside the first contact arm 1. Sliding grooves 8 are opened on the inner two sides of the first contact arm 1.

[0027] Adjustment mechanism 9 is installed inside the first contact arm 1 and the second contact arm 2, and is used to adjust the length;

[0028] The second reinforcing frame 10 is installed inside the second contact arm 2 to improve strength. One end of the second contact arm 2 has an external thread 11, and an installation sleeve 12 is connected to the external thread of the second contact arm 2. A contact 13 is fixedly connected to one side of the installation sleeve 12. The protective plate 4 outside the first contact arm 1 and the second contact arm 2 not only provides protection but also enhances the rigidity. At the same time, the first reinforcing frame 7 and the second reinforcing frame 10 are installed inside both, thereby strengthening the overall strength and preventing bending or deformation during use. The multiple first heat dissipation holes 6 on the outside of the first contact arm 1 and the second contact arm 2 can improve the heat dissipation effect of both and prevent performance from being affected by overheating due to power-on. Then, the fixed cylinder 903 at one end of the second contact arm 2 slides and extends within the first contact arm 1, and is then limited and fixed by the threaded rod 906 and two sets of nuts 907, which can adapt to different working conditions and needs.

[0029] like Figure 1 and Figure 2 As shown, the protective plate 4 and the first heat dissipation holes 6 are arranged in a ring array on the first contact arm 1 and the second contact arm 2. The first contact arm 1 and the second contact arm 2 are movably connected. The protective plate 4 outside the first contact arm 1 and the second contact arm 2 not only plays a protective role, but also enhances the hardness. The multiple first heat dissipation holes 6 on the outside of the first contact arm 1 and the second contact arm 2 prevent the performance from being affected by overheating due to power-on.

[0030] like Figure 1 and Figure 3 As shown, the adjustment mechanism 9 includes a first fixed sleeve 901, which is fixedly sleeved on the outside of one end of the first contact arm 1. A second fixed sleeve 902 is fixedly connected to the outside of the second contact arm 2. A fixed cylinder 903 is fixedly connected inside the second fixed sleeve 902. Slider blocks 904 are fixedly connected to both sides of the fixed cylinder 903. Second heat dissipation holes 905 are provided on the outer surface of the fixed cylinder 903. By using the fixed cylinder 903 inside the second contact arm 2 to slide within the first contact arm 1, the length between the first contact arm 1 and the second contact arm 2 can be adjusted, thereby adapting to different working conditions and needs.

[0031] like Figure 3 As shown, threaded rods 906 penetrate both the first fixed sleeve 901 and the second fixed sleeve 902. Nuts 907 are threadedly fitted onto the outside of the threaded rods 906. There are three sets of threaded rods 906, with two nuts 907 on the outside of each set. When the fixed cylinder 903 inside the second contact arm 2 is adjusted to a suitable position within the first contact arm 1, the three sets of threaded rods 906 are inserted into the first fixed sleeve 901 and the second fixed sleeve 902. One nut 907 is fitted inside the threaded rod 906 and the first fixed sleeve 901 to abut against it, while the other nut 907 is fitted outside one end of the threaded rod 906 for fixation and limitation. This can enhance the stability of the first contact arm 1 and the second contact arm 2 after adjustment.

[0032] like Figure 2 and Figure 3 As shown, the fixed cylinder 903 is slidably connected to the first contact arm 1 via the sliders 904 on both sides. The sliding groove 8 works in conjunction with the sliders 904. The fixed cylinder 903 is slidably connected to the sliding groove 8 in the first contact arm 1 via the sliders 904 on both sides, which improves the stability of the fixed cylinder 903 moving within the first contact arm 1.

[0033] like Figure 1 , Figure 2 and Figure 4As shown, the first reinforcing frame 7 and the second reinforcing frame 10 are cross structures. The first reinforcing frame 7 and the second reinforcing frame 10 are internally fixedly connected to the first contact arm 1 and the second contact arm 2. The first reinforcing frame 7 and the second reinforcing frame 10 reinforce the interior of the first contact arm 1 and the second contact arm 2, thereby improving their strength and hardness and preventing bending and deformation during use.

[0034] The working principle of this utility model is as follows: First, the mounting plate 3 at one end of the first contact arm 1 is threadedly fixed to the vacuum contactor. Then, to adapt to different working conditions and requirements, the extension and retraction between the first contact arm 1 and the second contact arm 2 needs to be adjusted. This is achieved by adjusting the extension and retraction of the second fixing sleeve 902 and the fixing cylinder 903 at one end of the second contact arm 2 within the sliding groove 8 inside the first contact arm 1. After adjusting to the appropriate position, three sets of threaded rods 906 are inserted through the first fixing sleeve 901 outside the first contact arm 1 and the second fixing sleeve 902 outside the second contact arm 2. One nut 907 is fitted inside the threaded rod 906 and the first fixing sleeve 901, while the other nut 907 is fitted outside one end of the threaded rod 906. Tightening the side to fix the limit position enhances the stability of the first contact arm 1 and the second contact arm 2 after adjustment. After adjustment, it can be powered on and started to work. The multiple sets of protective plates 4 set on the outside of the first contact arm 1 and the second contact arm 2 not only provide protection but also enhance the overall rigidity. At the same time, the first reinforcing frame 7 and the second reinforcing frame 10 are installed inside the first contact arm 1 and the second contact arm 2 to enhance the overall strength and prevent bending or deformation during use. The multiple first heat dissipation holes 6 on the outside of the first contact arm 1 and the second contact arm 2 can improve the heat dissipation effect and prevent performance from being affected by overheating when powered on. In this way, the use process of the vacuum contactor's contact arm is completed.

[0035] The above description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A contact arm of a vacuum contactor, characterized in that: Includes the first tentacle (1) and the second tentacle (2); Mounting plate (3) is installed at one end of the first contact arm (1) for installation with the vacuum contactor. Protective plate (4) is fixedly installed on the outside of the first contact arm (1) and the second contact arm (2). Fixing blocks (5) are fixedly connected on both sides below the protective plate (4). First heat dissipation holes (6) are opened on the outer surface of the first contact arm (1) and the second contact arm (2). A first reinforcing frame (7) is provided inside the first contact arm (1). Sliding grooves (8) are opened on both sides of the inner surface of the first contact arm (1). An adjustment mechanism (9) is installed inside the first contact arm (1) and the second contact arm (2) for adjusting the length; The second reinforcing frame (10) is set inside the second contact arm (2) to improve strength. One end of the second contact arm (2) is provided with an external thread (11). One end of the second contact arm (2) is connected to an mounting sleeve (12) by an external thread. One side of the mounting sleeve (12) is fixedly connected to a contact (13).

2. The contact arm of a vacuum contactor according to claim 1, characterized in that: The protective plate (4) and the first heat dissipation hole (6) are arranged in a ring array on the first contact arm (1) and the second contact arm (2), and the first contact arm (1) and the second contact arm (2) are movably connected.

3. The contact arm of a vacuum contactor according to claim 1, characterized in that: The adjustment mechanism (9) includes a first fixed sleeve (901), which is fixedly sleeved on the outside of one end of the first contact arm (1). A second fixed sleeve (902) is fixedly connected to the outside end of the second contact arm (2). A fixed cylinder (903) is fixedly connected inside the second fixed sleeve (902). Slider (904) is fixedly connected to both sides of the fixed cylinder (903). A second heat dissipation hole (905) is opened on the outer surface of the fixed cylinder (903).

4. The contact arm of a vacuum contactor according to claim 3, characterized in that: A threaded rod (906) is passed through the interior of both the first fixed sleeve (901) and the second fixed sleeve (902). The threaded rod (906) is fitted with a nut (907) on its outer thread. There are three sets of threaded rods (906), and each set of threaded rods (906) is fitted with two nuts (907).

5. The contact arm of a vacuum contactor according to claim 3, characterized in that: The fixed cylinder (903) is slidably connected to the first contact arm (1) via two side sliders (904), and the slide groove (8) is used in conjunction with the slider (904).

6. The contact arm of a vacuum contactor according to claim 1, characterized in that: The first reinforcing frame (7) and the second reinforcing frame (10) are cross structures, and the first reinforcing frame (7) and the second reinforcing frame (10) and the first contact arm (1) and the second contact arm (2) are internally fixedly connected.

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