A DC contactor
By designing protective components and installation mechanisms in DC contactors, the problem of the lack of effective pressure relief mechanisms in existing DC contactors is solved, and the convenience of effective pressure release and metal film replacement when voltage is too high or short-circuit is achieved, which significantly reduces safety risks.
Patent Information
- Application Number
- CN202420747174.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-04-11
AI Technical Summary
The existing DC contactors lack effective protective pressure relief mechanisms, which leads to an increase in the air pressure in the protective case when the voltage is too high or short-circuited, which may cause damage or explosion of internal components of the contactor, posing a major safety hazard.
A DC contactor is designed, including a protective assembly and a mounting mechanism. The protective components include partitions, coils, tight springs, insulating layers and push rods. Through the cooperation of these components, the up and down movement of the dynamic touch bridge is realized, achieving the effect of opening and closing the circuit. At the same time, by setting a circular hole and a metal film at the bottom of the protective case, when the voltage is too high or short-circuited, the metal film can be broken, increasing the space of the contactor cavity, releasing pressure, and achieving a protective effect. The installation mechanism uses the ball head spring and ball head to facilitate replacement of damaged metal film.
It effectively prevents the problem of untimely release of pressure when the voltage is too high or short-circuited, avoids damage or explosion of internal components of the contactor, reduces safety risks, and simplifies the replacement process of metal film.
Smart Images
Figure CN222720316U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic components, in particular to a DC contactor. Background Art
[0002] A DC contactor is a contactor whose iron core is controlled by a DC coil. Its load can be DC or AC. The iron core of a DC contactor is different from that of an AC contactor. It has no eddy current, so it is generally made of soft steel or industrial pure iron in a round shape.
[0003] The working principle of the DC contactor is to realize its switching function through the closing and opening between the moving contact bridge and the terminal.
[0004] However, the current DC contactor lacks an effective protective pressure relief mechanism. When the voltage is too high or short-circuited, the air pressure in the protective shell will increase, causing damage to the internal components of the contactor, and in severe cases, causing them to explode and crack. If the pressure cannot be effectively relieved when a fault occurs, there will be great safety hazards. In view of this, we propose a DC contactor. Utility Model Content
[0005] The purpose of the utility model is to provide a DC contactor to solve the problems raised in the above background technology.
[0006] To achieve the above object, the utility model provides the following technical solution: a DC contactor, comprising a mounting base plate, the top of the mounting base plate is fixedly connected to the bottom of the base, a circular ring plate is fixedly installed on the arc-shaped inner wall of the base, a protective shell is clamped inside the base, a protective cover is clamped on the top of the protective shell, a terminal is fixedly installed inside the protective cover, a protective component is arranged inside the protective shell, and the protective component includes:
[0007] The arc-shaped inner wall of the protective shell is fixedly connected to the arc-shaped outer wall of the partition, and a push rod is slidably installed on the arc-shaped inner wall of the partition;
[0008] The coil is fixedly mounted on the bottom of the partition, a moving iron core is fixedly mounted on the arc-shaped outer wall at the bottom end of the push rod, and a tight spring is sleeved on the arc-shaped outer wall at the top end of the push rod;
[0009] Insulating layer, the top of the push rod is fixedly connected to the bottom of the insulating layer, and the top of the insulating layer is fixedly connected to the bottom of the moving contact bridge.
[0010] Preferably, a circular hole is opened at the center of the bottom of the protective shell, and a metal film is fixedly installed on the bottom of the protective shell, and the metal film is located directly below the circular hole, so that the circuit can be closed smoothly.
[0011] Preferably, there are two terminal posts, which are located directly above the moving contact bridge, and the partition divides the interior of the protective shell into two upper and lower cavities.
[0012] Preferably, the top of the clamping spring is fixedly connected to the bottom of the insulating layer, and the bottom of the clamping spring is fixedly connected to the top of the partition.
[0013] Preferably, a mounting mechanism is provided at the bottom of the protective shell, a cylinder is fixedly mounted on the inner wall of the bottom of the protective shell, the inner bottom surface of the cylinder is fixedly connected to the bottom of the ball head spring, and a ball head is fixedly mounted on the top of the ball head spring.
[0014] Preferably, a limiting hole is provided on the arc-shaped outer wall of the base, the diameter of the limiting hole is adapted to the outer diameter of the ball head, and two groups of the mounting mechanisms are arranged, which are mirrored with the vertical center line of the protective shell as the mirror axis to achieve a better limiting and fixing effect.
[0015] Compared with the prior art, the utility model provides a DC contactor with the following beneficial effects:
[0016] 1. In order to better protect the DC contactor, the DC contactor is provided with a protection component, which cooperates with a partition, a coil, a clamping spring, an insulating layer and a push rod, so that the moving contact bridge can move up and down, so that it can contact and separate with the terminal, thereby achieving the effect of opening and closing the circuit. Furthermore, with the circular hole and the metal film, when the voltage is too high or short-circuited, the air pressure in the protective shell increases, which can break the metal film, increase the inner cavity space of the entire DC contactor, release the pressure, and achieve the protection effect.
[0017] 2. In order to better replace the damaged metal film, the DC contactor is provided with an installation mechanism, which cooperates with the cylinder, the ball head spring and the ball head, so that the ball head can be stuck into the limit hole, so as to quickly install the protective shell and the base together, and also facilitate the subsequent disassembly and replacement of the metal film. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 It is a schematic diagram of a structural cross-sectional view of the utility model as a whole;
[0020] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of the middle A area;
[0021] Figure 4 It is a partial structural schematic diagram of the utility model;
[0022] Figure 5It is a schematic diagram of the partial structure explosion of the utility model.
[0023] In the figure: 1. Installation base plate; 2. Base; 3. Ring plate; 4. Protective shell; 5. Protective cover; 6. Terminal; 7. Protective assembly; 71. Partition; 72. Push rod; 73. Coil; 74. Moving iron core; 75. Clamping spring; 76. Insulating layer; 77. Moving contact bridge; 78. Round hole; 79. Metal film; 8. Installation mechanism; 81. Cylinder; 82. Ball head spring; 83. Ball head; 84. Limit hole. DETAILED DESCRIPTION
[0024] like Figure 1-5 As shown, the utility model provides a technical solution: a DC contactor, including a mounting base plate 1, the top of the mounting base plate 1 is fixedly connected to the bottom of a base 2, a circular ring plate 3 is fixedly installed on the arc-shaped inner wall of the base 2, a protective shell 4 is clamped inside the base 2, a protective cover 5 is clamped on the top of the protective shell 4, a terminal 6 is fixedly installed inside the protective cover 5, and a protective component 7 is arranged inside the protective shell 4.
[0025] In one embodiment of the present invention, the protection component 7 includes a partition 71, the arc-shaped inner wall of the protection shell 4 is fixedly connected to the arc-shaped outer wall of the partition 71, the arc-shaped inner wall of the partition 71 is slidably installed with a push rod 72, the bottom of the partition 71 is fixedly installed with a coil 73, the arc-shaped outer wall at the bottom end of the push rod 72 is fixedly installed with a moving iron core 74, and the arc-shaped outer wall at the top of the push rod 72 is sleeved with a clamping spring 75. When the coil 73 is started, the moving iron core 74 moves upward through the magnetic field, thereby driving the push rod 72 to move upward, and the top of the push rod 72 is fixedly connected to the bottom of the insulating layer 76, thereby driving the insulating layer 76 to move upward. At this time, the clamping spring 75 is stretched and deformed, and the top of the insulating layer 76 is fixedly connected to the bottom of the moving contact bridge 77, so that the moving contact bridge 77 moves upward, so that the moving contact bridge 77 can contact the terminal 6, achieving The protective shell 4 has the effect of opening the circuit. On the contrary, the moving contact bridge 77 moves downward to disconnect the circuit. A circular hole 78 is opened in the center of the bottom of the protective shell 4, and a metal film 79 is fixedly installed on the bottom of the protective shell 4. The metal film 79 is located directly below the circular hole 78, so that the circuit can be closed smoothly. There are two terminals 6, which are located directly above the moving contact bridge 77. The partition 71 divides the interior of the protective shell 4 into two upper and lower cavities. The bottom of the insulating layer 76 is fixedly connected to the top of the spring 75, and the top of the partition 71 is fixedly connected to the bottom of the spring 75. Furthermore, with the circular hole 78 and the metal film 79, when the voltage is too high or short-circuited, the air pressure in the protective shell 4 increases, which can break through the metal film 79, thereby increasing the inner cavity space of the entire DC contactor, releasing the pressure, and achieving the protection effect.
[0026] In one embodiment of the utility model, a mounting mechanism 8 is provided at the bottom of the protective shell 4, and a cylinder 81 is fixedly installed on the inner wall of the bottom of the protective shell 4. The inner bottom surface of the cylinder 81 is fixedly connected to the bottom of the ball head spring 82, and a ball head 83 is fixedly installed on the top of the ball head spring 82. When the ball head 83 is pressed inward, the ball head spring 82 is compressed and deformed, and a limiting hole 84 is provided on the arc-shaped outer wall of the base 2. The diameter of the limiting hole 84 is adapted to the outer diameter of the ball head 83. Two groups of mounting mechanisms 8 are provided, and the vertical center line of the protective shell 4 is used as the mirror axis for the mirror setting, so that the limiting fixing effect is better, so that the ball head 83 leaves the limiting hole 84, so that the protective shell 4 can be taken out, and the damaged metal film 79 can be replaced. Conversely, the protective shell 4 and the base 2 can be quickly fixed together.
[0027] Working principle: when the coil 73 is started, the moving iron core 74 moves upward through the magnetic field, thereby driving the push rod 72 to move upward, thereby driving the insulating layer 76 to move upward. At this time, the spring 75 is stretched and deformed, thereby causing the moving contact bridge 77 to move upward, so that the moving contact bridge 77 can contact the terminal 6, thereby achieving the effect of opening the circuit. Conversely, the moving contact bridge 77 moves downward to disconnect the circuit. Furthermore, in conjunction with the circular hole 78 and the metal film 79, when the voltage is too high or short-circuited, the air pressure in the protective shell 4 increases, and the metal film 79 can be broken, thereby increasing the inner cavity space of the entire DC contactor, releasing the pressure, and achieving the protection effect. When the ball head 83 is pressed inward, the ball head spring 82 is compressed and deformed, thereby causing the ball head 83 to leave the limiting hole 84, thereby allowing the protective shell 4 to be removed and the damaged metal film 79 to be replaced. Conversely, the protective shell 4 can be quickly fixed to the base 2.
[0028] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.
Claims
1. A DC contactor, comprising a mounting base plate (1), characterized in that: The top of the mounting base plate (1) is fixedly connected to the bottom of the base (2); a circular ring plate (3) is fixedly mounted on the arc-shaped inner wall of the base (2); a protective shell (4) is clamped inside the base (2); a protective cover (5) is clamped on the top of the protective shell (4); a terminal (6) is fixedly mounted inside the protective cover (5); a protective component (7) is arranged inside the protective shell (4); the protective component (7) comprises: A partition (71), the arc-shaped inner wall of the protective shell (4) is fixedly connected to the arc-shaped outer wall of the partition (71), and a push rod (72) is slidably mounted on the arc-shaped inner wall of the partition (71); A coil (73), the bottom of the partition (71) is fixedly mounted with the coil (73), the bottom arc-shaped outer wall of the push rod (72) is fixedly mounted with a moving iron core (74), and the top arc-shaped outer wall of the push rod (72) is sleeved with a clamping spring (75); The top of the push rod (72) is fixedly connected to the bottom of the insulating layer (76), and the top of the insulating layer (76) is fixedly connected to the bottom of the moving contact bridge (77).
2. A DC contactor according to claim 1, characterized in that: A circular hole (78) is provided at the centre of the bottom of the protective shell (4), and a metal film (79) is fixedly mounted on the bottom of the protective shell (4), wherein the metal film (79) is located directly below the circular hole (78).
3. A DC contactor according to claim 1, characterized in that: There are two terminal posts (6) located directly above the moving contact bridge (77), and the partition (71) divides the interior of the protective shell (4) into two upper and lower cavities.
4. A DC contactor according to claim 1, characterized in that: The top of the clinging spring (75) is fixedly connected to the bottom of the insulating layer (76), and the bottom of the clinging spring (75) is fixedly connected to the top of the partition (71).
5. A DC contactor according to claim 1, characterized in that: The bottom of the protective shell (4) is provided with a mounting mechanism (8), the inner wall of the bottom of the protective shell (4) is fixedly mounted with a cylinder (81), the inner bottom surface of the cylinder (81) is fixedly connected to the bottom of a ball head spring (82), and the top of the ball head spring (82) is fixedly mounted with a ball head (83).
6. A DC contactor according to claim 5, characterized in that: The arc-shaped outer wall of the base (2) is provided with a limiting hole (84), the diameter of the limiting hole (84) being compatible with the outer diameter of the ball head (83), and the mounting mechanism (8) is provided with two groups, and is mirror-imaged with the vertical center line of the protective shell (4) as the mirror axis.