Travel switch of contactor

Abstract

The utility model relates to a travel switch of a contactor. The travel switch comprises a shell and a switch assembly arranged in the shell. According to the utility model, the switch assembly is integrated in the shell, so that the structural compactness is realized, the size of the whole travel switch is reduced, the travel switch is convenient to install and use in a limited space, and the travel is effectively amplified through the combined design of the conversion lever and the conversion torsion spring, so that the travel switch is more compact. According to the utility model, the external force linear motion stroke is far smaller than the conversion support stroke, and the stroke ratio is controlled within the range of not more than 1 / 2, so that the contact can make sensitive response to the tiny stroke change of the iron core, thereby improving the response speed and accuracy of the switch; and due to the design of a switching support inner clamping groove and a switching reaction spring, the stability and reliability of the contacts in the contact and separation process are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a travel switch of a contactor. Background Art

[0002] As an important component in an electrical control system, contactors are widely used in various automation devices and circuits to achieve on-off control of circuits. As a type of contactor, a travel switch switches the circuit state through the contact and separation of mechanical contacts, and the stability and reliability of its performance are crucial for the operation of the entire electrical system. Inside the contactor, the exciting coil of the operating electromagnet is designed as two parts: a holding winding and an attracting winding. This distinction aims to optimize the working process of the electromagnet, ensure that current can be supplied as needed during the attracting and holding stages, thereby achieving energy conservation and efficiency improvement. However, with the small travel changes of the iron core during operation, the circuit control requirements of the two windings also change accordingly, which poses strict requirements on the accuracy of the control circuit. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a travel switch of a contactor with a compact structure, stable and reliable performance, and sensitive response.

[0004] To achieve the above purpose, the utility model adopts such a travel switch of a contactor, which includes a housing and a switch assembly arranged inside the housing. The switch assembly includes a switch housing, a conversion support arranged inside the switch housing, a moving contact assembly, and a static contact assembly. The static contact assemblies are respectively arranged on both sides of the conversion support. The moving contact assembly is arranged inside the conversion support, and both ends extend outward respectively to cooperate with the static contact assemblies to achieve on-off of the circuit. A clamping groove is opened at one end of the conversion support close to the moving contact assembly, and a conversion reaction spring is clamped in the clamping groove. One end of the conversion reaction spring abuts against the inside of the clamping groove, and the other end abuts against the switch housing. A conversion lever and a conversion torsion spring are arranged at one end of the conversion support far from the moving contact assembly.

[0005] The beneficial effects of the above structure are as follows: By integrating the switch assembly inside the housing, the compactness of the structure is achieved, which is beneficial to reducing the volume of the entire travel switch, facilitating installation and use in a limited space. And through the combined design of the conversion lever and the conversion torsion spring, the effective amplification of the travel is realized, making the linear action travel of the external force much smaller than the travel of the conversion support, and the travel ratio is controlled within a range not greater than 1 / 2, enabling the contact to respond sensitively to the small travel changes of the iron core, thereby improving the response speed and accuracy of the switch. The cooperation between the moving contact assembly and the static contact assembly, as well as the design of the clamping groove and the conversion reaction spring inside the conversion support, ensure the stability and reliability of the contacts during the contact and separation processes.

[0006] This utility model is further configured such that the switch assembly further includes a conversion dynamic pressure spring, which is disposed within the conversion support and has one end abutting against the moving contact assembly and the other end abutted against a positioning post provided on the conversion support. The conversion dynamic pressure spring provides additional support and stability for the moving contact assembly. During the operation of the contactor, the moving contact assembly needs to frequently perform contact and separation operations, and the presence of the conversion dynamic pressure spring can effectively reduce the position offset of the moving contact assembly caused by vibration or impact, thereby ensuring accurate contact of the contacts and reliable on / off of the circuit.

[0007] This utility model is further configured such that the moving contact assembly includes a moving contact and a moving contact plate connected to the moving contact. The moving contacts are respectively connected to both sides of the lower surface of the moving contact plate. By directly connecting the moving contacts to both sides of the lower surface of the moving contact plate, this layout enables the moving contacts to more stably contact the static contacts during the contact process, reducing electrical faults caused by contact position offset or poor contact.

[0008] This utility model is further configured such that the static contact assembly includes a static contact and a static contact plate connected to the static contact. The static contact plate is disposed on both sides of the conversion support, and the static contact is located on the upper surface of the static contact plate and is arranged corresponding to the moving contact. By using the static contact plate as the support structure for the static contact, it can ensure that the static contact maintains a stable position and shape during long-term use. This stability helps to reduce contact problems caused by contact position offset or deformation, thereby improving the on / off stability and reliability of the circuit. Moreover, the static contact and the moving contact are arranged corresponding to each other, which can ensure that the two can accurately contact and form a stable electrical connection when the contactor operates.

[0009] This utility model is further configured such that the conversion lever includes a shaft body portion connected to the switch housing, a touch portion extending out of the switch housing from one end of the shaft body portion, and a stroke portion extending into the switch housing from the other end of the shaft body portion and connected to the conversion support. A long waist-shaped slot that cooperates with the conversion torsion spring is provided on the stroke portion. The conversion torsion spring includes a spiral portion connected to the switch housing and spaced a certain distance from the shaft body portion of the conversion lever, a movable portion extending from one end of the spiral portion and inserted into the conversion lever, and a fixed portion extending from the other end of the spiral portion and fixedly connected inside the switch housing. Both the fixed portion and the stroke portion are rod-shaped structures. By extending the touch portion of the conversion lever outside the switch housing, it is convenient for users to directly operate. At the same time, the stroke portion of the conversion lever and the movable portion of the conversion torsion spring are cooperated through the long waist-shaped slot, enabling the conversion lever to quickly respond and rotate smoothly when subjected to an external force, thereby improving the response speed of the switch. The design of its long waist-shaped slot allows the movable portion of the conversion torsion spring to have a certain degree of freedom when the lever rotates, but can still maintain a stable cooperation relationship, avoiding failures caused by loosening or misalignment of mechanical components. At the same time, the mutual cooperation of the spiral portion, movable portion, and fixed portion of the conversion torsion spring provides a stable restoring force and necessary torque for the conversion lever, ensuring the accuracy of the switch in the closed and open states.

[0010] This utility model is further configured such that the switch housing includes a conversion base and a conversion cover covering the conversion base. A plurality of placement slots corresponding to the switch components are provided on the conversion base. By dividing the switch housing into two parts, namely the conversion base and the conversion cover, a modular design of the switch components is achieved. During assembly, each switch component can be first placed in the corresponding placement slot on the conversion base, and then the conversion cover can be covered, thereby simplifying the assembly process and improving the assembly efficiency. The design of the plurality of placement slots on the conversion base enables the switch components to be arranged orderly in a limited space, avoiding layout chaos or functional limitations caused by insufficient space. Description of the Drawings

[0011] Figure 1 is a schematic diagram of the housing structure of an embodiment of the present utility model.

[0012] Figure 2 is a schematic diagram of the switch component structure inside the housing of an embodiment of the present utility model.

[0013] Figure 3 is an exploded view of the conversion base and the conversion cover of an embodiment of the present utility model.

[0014] Figure 4 is a front view of the internal structure of the switch component of an embodiment of the present utility model.

[0015] Figure 5 is a schematic diagram of the moving contact component structure of an embodiment of the present utility model.

[0016] Figure 6 is a conversion support cross-sectional view of an embodiment of the present utility model.

[0017] Figure 7 is an assembly drawing of the conversion support inner conversion dynamic pressure spring of an embodiment of the present utility model.

[0018] Figure 8 is a front schematic view of the moving contact assembly and the static contact assembly of an embodiment of the present utility model.

[0019] Figure 9 is a combined schematic view of the conversion lever and the conversion torsion spring of an embodiment of the present utility model. Detailed implementation manners

[0020] As Figures 1 - 9 shown, an embodiment of the present utility model provides a travel switch of a contactor, which includes a housing 1 and a switch assembly 2 disposed inside the housing 1. The switch assembly 2, as the core part, is integrated inside the housing 1 and includes a switch housing 3, a conversion support 4, a moving contact assembly 5, a static contact assembly 6, a conversion reaction spring 7, a conversion dynamic pressure spring 8, and a combined mechanism of a conversion lever 9 and a conversion torsion spring 10. The switch housing 3 is divided into a conversion base 31 and a conversion cover 32 covering the conversion base 31. A plurality of placement grooves that perfectly fit the switch assembly 2 are arranged on the conversion base 31 to ensure the stable installation and precise positioning of each component. The conversion support 4 is installed inside the switch housing 3, and a static contact assembly 6 is respectively disposed on both sides thereof. The moving contact assembly 5 is disposed inside the conversion support 4, and both ends thereof extend outwards respectively to cooperate with the static contact assembly 6 to achieve the on-off of the circuit. One end of the conversion support 4 close to the moving contact assembly 5 is provided with a card slot 41 for installing the conversion reaction spring 7. One end of the conversion reaction spring 7 is closely attached inside the card slot 41, and the other end abuts against the switch housing 3 to provide a necessary reaction force for the reset of the moving contact assembly 5.

[0021] As Figure 5 shown, the moving contact assembly 5 is composed of two moving contact points 51 and a moving contact plate 52 connected to the two moving contact points 51. The two moving contact points 51 are respectively disposed on both sides of the lower surface of the moving contact plate 52.

[0022] As shown in FIGS. 6 and Figure 7 shown, a conversion dynamic pressure spring 8 is further disposed inside the conversion support 4. One end thereof is closely attached to the moving contact assembly 5, and the other end relies on a positioning post 42 on the conversion support 4 to provide a necessary supporting force for the reliable movement of the moving contact assembly 5. The conversion dynamic pressure spring 8 and the conversion reaction spring 7 are both simplified and described in a cylindrical shape.

[0023] As Figure 8 shown, the static contact assembly 6 is composed of a static contact point 61 and a static contact plate 62. The static contact plate 62 is installed on both sides of the conversion support 4, and the static contact point 61 is located on the upper surface of the static contact plate 62, corresponding to the position of the moving contact point 51 one by one to ensure the accuracy of the on-off of the circuit.

[0024] As Figure 9 shown, the conversion lever 9 is the core of the transmission mechanism. Its shaft body portion 91 is connected to the switch housing 3. The touch portion 92 extends out of the switch housing 3 from one end of the shaft body portion 91 for easy external operation. The stroke portion 93 extends into the switch housing 3 from the other end of the shaft body portion 91 and is connected to the conversion support 4. A long waist slot 931 is provided on the stroke portion 93 and is closely matched with the conversion torsion spring 10 to achieve effective conversion and amplification of the stroke. The spiral portion 101 of the conversion torsion spring 10 is fixed on the switch housing 3 and maintains a certain distance from the shaft body portion 91 of the conversion lever 9. Its movable portion 102 is inserted into the long waist slot 931 of the conversion lever 9, and the fixed portion 103 is connected inside the switch housing 3 to provide a stable force for the reset of the conversion lever 9.

[0025] Through the design and coordinated work of the above components of the entire switch assembly 2, when an external force acts on the touch portion 92 of the conversion lever 9, the conversion lever 9 rotates around its shaft body portion 91. Through the interaction between the long waist slot 931 on the stroke portion 93 and the movable portion 102 of the conversion torsion spring 10, linear motion is converted into rotational motion and the stroke is amplified. The spiral portion 101 of the conversion torsion spring 10 is fixed and provides a reset torque for the conversion lever 9 to ensure that it can automatically return to the initial position after the external force is removed.

[0026] Of course, in addition to the above embodiments, the present utility model can also have many other embodiments. Without departing from the essence of the technical solution of the present utility model, those skilled in the art can make various corresponding changes and deformations according to the present utility model. And if these changes or deformations are equivalent to the technical solutions in this patent, then these corresponding changes and deformations should all fall within the protection scope of the claims attached to the present utility model.

Claims

1. A travel switch of a contactor, comprising a housing and a switch assembly arranged in the housing, characterized in that: The switch assembly includes a switch housing, a conversion support arranged in the switch housing, a moving contact assembly and a static contact assembly, wherein the static contact assemblies are respectively arranged on both sides of the conversion support, the moving contact assembly is arranged in the conversion support, and both ends extend outwards respectively to cooperate with the static contact assembly to realize the on-off of the circuit, the conversion support is provided with a slot at one end close to the moving contact assembly, a conversion reaction spring is mounted in the slot, one end of the conversion reaction spring abuts in the slot, and the other end abuts on the switch housing, and the conversion support is provided with a conversion lever and a conversion torsion spring at one end away from the moving contact assembly.

2. The travel switch of the contactor according to claim 1, characterized in that: The switch assembly also includes a conversion dynamic pressure spring, which is arranged in the conversion support and has one end abutting against the dynamic contact assembly and the other end abutting against a positioning column provided on the conversion support.

3. The travel switch of the contactor according to claim 1 or 2, characterized in that: The moving contact assembly comprises a moving contact point and a moving touch plate connected to the moving contact point, and the moving contact point is respectively connected to two sides of the lower surface of the moving touch plate.

4. The travel switch of the contactor according to claim 3, characterized in that: The stationary contact assembly includes a stationary contact and a stationary contact plate connected to the stationary contact. The stationary contact plates are arranged on both sides of the conversion support. The stationary contact is located on the upper surface of the stationary contact plate and is arranged corresponding to the moving contact.

5. The travel switch of the contactor according to claim 1, characterized in that: The conversion lever includes an axial body portion connected to the switch housing, a touch portion extending from one end of the axial body portion to the outside of the switch housing, and a stroke portion extending from the other end of the axial body portion into the switch housing and connected to the conversion support, and the stroke portion is provided with a long waist groove that matches the conversion torsion spring. The conversion torsion spring includes a spiral portion connected to the switch housing and spaced a certain distance from the axial body portion of the conversion lever, a movable portion extending from one end of the spiral portion and inserted into the conversion lever, and a fixed portion extending from the other end of the spiral portion and fixedly connected to the switch housing, and the fixed portion and the stroke portion are both rod-shaped structures.

6. The travel switch of the contactor according to claim 1, characterized in that: The switch housing comprises a conversion seat and a conversion cover arranged on the conversion seat. The conversion seat is provided with a plurality of placement grooves corresponding to the switch components.

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