Composite drive connecting mechanism meeting limit short-circuit working condition

Abstract

The invention provides a composite drive connecting mechanism meeting the limit short circuit working condition, and belongs to the technical field of electrical equipment. The first pull rod of the electromagnetic assembly is connected with the moving contact, and the two ends of the first pull rod respectively penetrate through the two ends of the electromagnetic seat, so that the two ends of the first pull rod are provided with guide points, the stability of the first pull rod during installation and movement is ensured, the coaxiality is ensured, and the use effect is improved; a plurality of auxiliary switches are further arranged on the electromagnetic base and located on the side of the first pull rod, and a lever stirring assembly is arranged between the first pull rod and each auxiliary switch, so that when the first pull rod acts, the corresponding auxiliary switch can be triggered through the lever stirring assembly, function expansion is achieved, the functions are more diversified, and the practicability is high. And the axial acting force of the first pull rod is converted into the radial acting force through the lever shifting assembly, so that the linear impact on the auxiliary switch can be reduced, the protection effect is improved, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and more specifically to a composite drive connection mechanism that meets the requirements of extreme short-circuit conditions. Background Technology

[0002] Contactors, as a commonly used control structure in circuit systems, can realize the connection or disconnection of circuits. In order to improve the performance reliability of contactors under extreme short-circuit conditions, contactors are usually equipped with a composite drive connection mechanism, which provides a stable closing holding force.

[0003] Currently, existing composite drive connection mechanisms on the market typically include a magnetic circuit assembly and a manual assembly. The pull rod of the magnetic circuit assembly is connected to the moving contact of the contactor, allowing the magnetic circuit assembly to drive the moving contact through the movement of its pull rod. Additionally, the pull rod of the magnetic circuit assembly is also connected to a manual assembly, which can also move the pull rod to drive the moving contact. For example, patent CN221327611U discloses a single-phase contactor with a manual adjustment mechanism. Its insulating rod has an electromagnetic control mechanism at its lower end that controls the contact or disconnection of the moving contact. The stationary iron core of the electromagnetic control mechanism is fixed inside the control box, and the moving iron core is located below the stationary iron core, with the two arranged opposite each other. A release spring is fitted between the moving and stationary iron cores, abutting against both. The insulating rod passes sequentially through the control box, the stationary iron core, and the moving iron core, with its lower end fixedly connected to the moving iron core. A coil frame is fixed to the lower end of the stationary iron core, and a coil is wound on the coil frame. When the coil is energized, it drives the moving iron core to move the insulating rod, thereby achieving the connection or disconnection of the moving and stationary contacts. Meanwhile, a manual adjustment mechanism is also provided inside the housing. This mechanism includes a pry bar, which is inserted through an adjustment hole and connected to the insulating rod. By pulling the pry bar up and down, the insulating rod slides up and down, thereby connecting or disconnecting the moving contact from the stationary contact. Although the above structure can meet the requirements of composite drive, the moving iron core of its electromagnetic control mechanism is connected to the insulating rod through a rod mounted on it. This means that one end of the rod needs to be connected to the stationary iron core, and only one end is guided by the fixed seat of the electromagnetic control mechanism. This poses a risk of rod tilting and cannot guarantee the coaxiality of the rod and the insulating rod, affecting the performance. In addition, both the electromagnetic control mechanism and the manual adjustment mechanism are only used as structures to drive the movement of the moving contact, which is relatively simple and not conducive to the widespread use of the product. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention aims to provide a composite drive connection mechanism that meets the requirements of extreme short-circuit conditions. The manual component is positioned on the side of the electromagnetic component away from the moving contact. Both ends of the first pull rod extend from the ends of the electromagnetic component's housing and are connected to the manual component and the moving contact, respectively. This ensures that both ends of the first pull rod are guided by the electromagnetic component's housing, guaranteeing stability and coaxiality after installation, resulting in better performance. Furthermore, several auxiliary switches are installed on the electromagnetic component's housing, located on the side where the manual component is located. The first pull rod is equipped with lever actuation components corresponding to the auxiliary switches. These lever actuation components trigger the auxiliary switches when the first pull rod is actuated, expanding functionality. The lever actuation components also change the direction of the force applied by the first pull rod, reducing the impact force on the auxiliary switches during triggering, thus providing structural protection and facilitating product adoption.

[0005] The specific technical solution is as follows: A composite drive connection mechanism that meets the ultimate short-circuit condition includes an electromagnetic component and a manual component. The electromagnetic component includes an electromagnetic base and a moving iron core located within the electromagnetic base and sliding within the electromagnetic base. One end of a first pull rod is connected to a moving contact, and the other end of the first pull rod passes through one end of the electromagnetic base and is fixedly connected to the moving iron core. The end of the first pull rod connected to the moving iron core continues to extend and pass through the other end of the electromagnetic base. The manual component is located on the side of the electromagnetic component away from the moving contact. The end of the first pull rod extending from the other end of the electromagnetic base is connected to the manual component. Several auxiliary switches are arranged on the other end of the electromagnetic base, beside the first pull rod, with the trigger head of each auxiliary switch facing the first pull rod. Several lever actuation components, each corresponding to one of the auxiliary switches, are arranged at the end of the first pull rod connected to the manual component. When the first pull rod is actuated, the lever actuation components selectively contact the corresponding auxiliary switch.

[0006] The aforementioned composite drive connection mechanism that meets the ultimate short-circuit condition has guide holes at both ends of the electromagnetic base, the middle part of the first pull rod is located inside the electromagnetic base and connected to the moving iron core inside the electromagnetic base, and the two ends of the first pull rod pass through the two guide holes respectively.

[0007] The aforementioned composite drive connection mechanism that meets the extreme short-circuit condition includes a lever actuation assembly comprising a trigger limit member, a lever seat, and a lever. The trigger limit member is fixedly sleeved on the first pull rod, the lever seat is mounted on the electromagnetic seat and located beside the first pull rod, the middle part of the lever is hinged to the lever seat, one end of the lever is connected to the trigger limit member, and the other end of the lever selectively contacts the trigger head of the auxiliary switch.

[0008] The aforementioned composite drive connection mechanism that meets the ultimate short-circuit condition includes auxiliary switches divided into several groups, each group comprising two auxiliary switches, with the two auxiliary switches in the same group symmetrically arranged on both sides of the first pull rod.

[0009] The aforementioned composite drive connection mechanism that satisfies the extreme short-circuit condition includes a trigger limit member having an annular structure, and an annular groove arranged circumferentially on the outer wall of the trigger limit member. One end of the lever is spherical or cylindrical and extends into the annular groove.

[0010] The aforementioned composite drive connection mechanism that meets the ultimate short-circuit condition is provided with a trigger ramp at the end where the lever selectively contacts the trigger head of the trigger switch.

[0011] The aforementioned composite drive connection mechanism that meets the ultimate short-circuit condition includes a support column on the side of the electromagnetic base away from the manual component. The support columns are arranged along the axial direction of the first pull rod, and one end of the support column is connected to the electromagnetic base.

[0012] The aforementioned composite drive connection mechanism that meets the ultimate short-circuit condition includes an insulating element provided between the first pull rod and the moving contact.

[0013] The aforementioned composite drive connection mechanism that meets the ultimate short-circuit condition includes an overtravel component between the insulating component and the first pull rod. The overtravel component includes a second pull rod, a spring, and a limiting component. One end of the first pull rod connected to the insulating component has a telescopic hole along its axial direction. One end of the second pull rod is inserted into the telescopic hole, and a protruding retaining edge is provided on the outer wall of the end of the second pull rod inserted into the telescopic hole. The spring is disposed in the telescopic hole and sleeved on the outside of the second pull rod. The two ends of the spring abut against the bottom of the telescopic hole and the retaining edge, respectively. A limiting component is provided at the opening of the telescopic hole. One end of the second pull rod passes through the limiting component and connects to the insulating component. The side of the retaining edge away from the spring abuts against the limiting component.

[0014] The positive effects of the above technical solution are: The aforementioned composite drive connection mechanism that meets the ultimate short-circuit condition ensures stability during installation and movement of the first pull rod by having both ends of the first pull rod connected to the moving contact pass through both ends of the electromagnetic base of the electromagnetic component, thus providing guide points at both ends of the first pull rod. This improves coaxiality and guarantees performance. Furthermore, several auxiliary switches are arranged on the electromagnetic base beside the first pull rod, and a lever actuation assembly is provided between the first pull rod and each auxiliary switch. This allows the corresponding auxiliary switch to be triggered by the lever actuation assembly when the first pull rod is activated, thereby expanding functionality and making it more versatile. Moreover, the lever actuation assembly converts the axial force of the first pull rod into a radial force, avoiding linear impact on the auxiliary switches, resulting in better protection and a longer service life. Attached Figure Description

[0015] Figure 1 This is a structural view of a composite drive connection mechanism that meets the ultimate short-circuit condition according to the present invention. Figure 2 This is a structural diagram from another perspective of a composite drive connection mechanism that meets the ultimate short-circuit condition according to the present invention. Figure 3 This is a schematic diagram of the installation of the first pull rod on the electromagnetic base according to a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of a lever actuation assembly according to a preferred embodiment of the present invention; Figure 5 This is a cross-sectional view of an overtravel component according to a preferred embodiment of the present invention.

[0016] In the attached diagram: 1. Electromagnetic component; 11. Electromagnetic base; 12. First pull rod; 111. Guide through hole; 121. Telescopic hole; 2. Manual component; 3. Auxiliary switch; 4. Lever actuation component; 41. Trigger limit component; 42. Lever base; 43. Lever; 411. Annular groove; 431. Trigger inclined surface; 5. Support column; 6. Overtravel component; 61. Second pull rod; 62. Spring; 63. Limit component; 611. Stop edge. Detailed Implementation

[0017] To make the technical means, creative features, objectives, and effects of this invention easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 To be continued Figure 5 The technical solutions provided by this invention are described in detail, but the following content is not intended to limit this invention.

[0018] Figure 1 This is a structural view of a composite drive connection mechanism that meets the ultimate short-circuit condition according to the present invention. Figure 2 This is a structural diagram from another perspective of a composite drive connection mechanism that meets the ultimate short-circuit condition according to the present invention. (See diagram below.) Figure 1 and Figure 2As shown, the composite drive connection mechanism that meets the ultimate short-circuit condition provided in this embodiment includes an electromagnetic component 1 and a manual component 2, which are used to connect with the moving contact to drive the moving contact. The electromagnetic component 1 further includes an electromagnetic base 11 and a moving iron core located within the electromagnetic base 11 and sliding within it. One end of the first pull rod 12 is connected to the moving contact, and the other end of the first pull rod 12 passes through one end of the electromagnetic base 11 and is fixedly connected to the moving iron core. This allows the moving iron core to drive the first pull rod 12 when the electromagnetic component 1 is energized, thereby realizing the movement of the moving contact. It is worth noting that since some contactors on the market already have an electromagnetic component 1, and the use of the moving iron core of the electromagnetic component 1 to drive the pull rod to operate the moving contact is a relatively mature technology, the specific structure of the electromagnetic component 1 and its connection with the pull rod will not be described in detail here.

[0019] Figure 3 This is a schematic diagram showing the installation of the first pull rod on the electromagnetic base according to a preferred embodiment of the present invention. Figures 1 to 3 As shown, the end of the first pull rod 12 connected to the moving iron core extends further and passes through the other end of the electromagnetic base 11, so that both ends of the first pull rod 12 are guided by the electromagnetic base 11. This ensures the stability of the first pull rod 12's movement while meeting the requirements for the coordinated movement of the first pull rod 12 and the moving iron core, preventing tilting and guaranteeing coaxiality for better performance. Furthermore, the manual component 2 is located on the side of the electromagnetic component 1 away from the moving contact. The end of the first pull rod 12 extending from the other end of the electromagnetic base 11 is connected to the manual component 2, allowing the manual component 2 to also operate the first pull rod 12, thereby driving the moving contact. Additionally, several auxiliary switches 3 are arranged on the other end of the electromagnetic base 11, beside the first pull rod 12, with the trigger head of each auxiliary switch 3 facing the first pull rod 12. This provides the conditions for triggering the auxiliary switches 3 when the first pull rod 12 moves, enabling functional expansion and diversification. In addition, a number of lever actuation components 4 corresponding to the auxiliary switches 3 are provided at the end of the first pull rod 12 connected to the manual component 2. When the first pull rod 12 is activated, the lever actuation component 4 selectively contacts the corresponding auxiliary switch 3. That is, when the first pull rod 12 is activated, the corresponding auxiliary switch 3 can be triggered by the lever actuation component 4, thereby expanding the function, diversifying the functions, and facilitating the promotion and use of the product.

[0020] More specifically, both ends of the electromagnetic base 11 are provided with guide holes 111. At this time, the middle part of the first pull rod 12 is located inside the electromagnetic base 11 and connected to the moving iron core inside the electromagnetic base 11. The two ends of the first pull rod 12 pass through the two guide holes 111 respectively. That is, the two guide holes 111 ensure that the first pull rod 12 has at least two guide points, thereby maintaining the stability of the first pull rod 12 during installation and movement, preventing tilting problems, and ensuring coaxiality.

[0021] Figure 4 This is a schematic diagram of a lever actuation assembly according to a preferred embodiment of the present invention. Figure 1 , Figure 2 as well as Figure 4 As shown, the lever actuation assembly 4 includes a trigger limiter 41, a lever seat 42, and a lever 43. The trigger limiter 41 is fixedly sleeved on the first pull rod 12. The lever seat 42 is mounted on the electromagnetic seat 11 and located beside the first pull rod 12. The middle part of the lever 43 is hinged to the lever seat 42. One end of the lever 43 is connected to the trigger limiter 41, and the other end of the lever 43 selectively contacts the trigger head of the auxiliary switch 3. This allows the first pull rod 12 to move when it is activated, causing the trigger limiter 41 to move, thereby deflecting the lever 43. This allows the other end of the lever 43 to trigger the trigger head of the corresponding auxiliary switch 3, thus triggering the auxiliary switch 3. Furthermore, the lever 43 converts the axial force of the first pull rod 12 into a radial force, avoiding a linear impact on the trigger head of the auxiliary switch 3 when the first pull rod 12 is activated. This results in better structural protection and a longer service life. It is worth noting that when the trigger limiting member 41 is sleeved on the first pull rod 12, it may include, but is not limited to, setting retaining rings at both ends of the trigger limiting member 41 to restrict the trigger limiting member 41 on the first pull rod 12. It is sufficient to limit the trigger limiting member 41 to a predetermined position on the first pull rod 12 and restrict its axial movement. Therefore, the specific installation structure of the trigger limiting member 41 on the first pull rod 12 will not be described in detail here.

[0022] More specifically, the auxiliary switches 3 are divided into several groups, and each group of auxiliary switches 3 includes two auxiliary switches 3. At this time, the two auxiliary switches 3 in the same group are symmetrically arranged on both sides of the first pull rod 12. The two auxiliary switches 3 in the same group form a staggered distribution, and when the two auxiliary switches 3 in the same group are used together, the reliability of the auxiliary switches 3 can be effectively improved, and the structural design is more reasonable.

[0023] More specifically, the trigger limiting member 41 installed on the first pull rod 12 is a ring structure, and a ring groove 411 arranged around its circumference is opened on the outer wall of the trigger limiting member 41. One end of the lever 43 is spherical or cylindrical and extends into the ring groove 411. This allows the two side walls of the ring groove 411 to push the end of the lever 43 to move, regardless of which side the trigger limiting member 41 moves along its axial direction when the first pull rod 12 drives it, thus achieving the deflection of the lever 43. This results in better structural adaptability.

[0024] More specifically, a triggering ramp 431 is provided at the end of the lever 43 that selectively contacts the trigger head of the trigger switch, so that the lever 43 can push the trigger head of the trigger switch through the triggering ramp 431. That is, when the lever 43 swings, the trigger head of the trigger switch can be gradually pushed by the inclined surface of the triggering ramp 431, which further avoids direct impact on the trigger head of the trigger switch and provides better protection.

[0025] More specifically, a support column 5 is provided on the side of the electromagnetic base 11 opposite to the manual assembly 2. Preferably, several support columns 5 are provided, spaced apart and arranged in parallel, so that a space can be formed between the support columns 5, providing installation space for the subsequent rear-end mechanism, including the vacuum interrupter. Furthermore, each support column 5 is arranged along the axial direction of the first tie rod 12, and one end of the support column 5 is connected to the electromagnetic base 11. The rear-end mechanism, including the vacuum interrupter, is installed through the support columns 5, so that the composite drive connection mechanism and the rear-end mechanism can be installed on the same structural component, thereby ensuring the coaxiality and parallelism between the composite drive connection mechanism and the rear-end mechanism, resulting in a more stable structure and better performance.

[0026] More specifically, an insulating component is provided between the first pull rod 12 and the moving contact, which achieves electrical isolation and ensures the safety of the composite drive connection mechanism during operation.

[0027] Figure 5 This is a cross-sectional view of an overtravel component according to a preferred embodiment of the present invention. Figure 1 , Figure 2 as well as Figure 5As shown, an overtravel assembly 6 is also provided between the insulating component and the first pull rod 12. The overtravel assembly 6 can prevent structural damage caused by excessive travel of the first pull rod 12 due to accidental mishaps in the composite drive connection mechanism, thus providing better safety protection. At this time, the overtravel assembly 6 includes a second pull rod 61, a spring 62, and a limiting component 63. The end of the first pull rod 12 connected to the insulating component has a telescopic hole 121 along its axial direction, providing installation and movement space for the subsequent second pull rod 61 and spring 62. At this time, one end of the second pull rod 61 is inserted into the telescopic hole 121, and a protruding retaining edge 611 is provided on the outer wall of the end of the second pull rod 61 inserted into the telescopic hole 121. The spring 62 is disposed in the telescopic hole 121 and sleeved on the outside of the second pull rod 61. The two ends of the spring 62 abut against the bottom of the telescopic hole 121 and the retaining edge 611, respectively. The spring 62 provides preload for the telescopic movement of the second pull rod 61 in the telescopic hole 121. When the first pull rod 12 drives the contact to move, if the first pull rod 12 moves excessively, the deformation of the spring 62 can adapt to it, thus avoiding damage to the structure. In addition, a limiting member 63 is provided at the opening of the telescopic hole 121. One end of the second pull rod 61 passes through the limiting member 63 and connects to the insulating component. Furthermore, the side of the retaining flange 611 facing away from the spring 62 abuts against the limiting member 63. That is, the limiting member 63 forms a limiting structure at the opening of the telescopic hole 121, reliably restricting the second pull rod 61 to the first pull rod 12, making the connection more reliable. In addition, the overtravel component 6 is built into the first pull rod 12, which realizes the hidden installation of the overtravel component 6 in the electromagnetic component 1, saving space and avoiding the problem of large volume and weight of the insulator caused by setting the overtravel structure in the existing insulator structure. It also reduces the distance between the first pull rod 12 and the moving contact, improving the closing speed. It is worth noting that the limiting member 63 is a slotted nut and is threaded to the opening of the telescopic hole 121, which facilitates disassembly and assembly and is beneficial for maintenance and repair.

[0028] The composite drive connection mechanism for meeting extreme short-circuit conditions provided in this embodiment includes an electromagnetic component 1, a manual component 2, auxiliary switches 3, and a lever actuation component 4. By connecting the first pull rod 12 of the electromagnetic component 1 to the moving contact, and with both ends of the first pull rod 12 passing through both ends of the electromagnetic base 11, both ends of the first pull rod 12 have guide points, thereby ensuring the stability of the first pull rod 12 during installation and movement, guaranteeing coaxiality, and improving the performance. At the same time, several auxiliary switches 3 are also provided on the electromagnetic base 11 and located beside the first pull rod 12, and a lever actuation component 4 is provided between the first pull rod 12 and each auxiliary switch 3, so that when the first pull rod 12 moves, it can trigger the corresponding auxiliary switch 3 through the lever actuation component 4, realizing functional expansion and making the functions more diverse. Furthermore, by converting the axial force of the first pull rod 12 into a radial force through the lever actuation component 4, the linear impact on the auxiliary switch 3 can be reduced, improving the protection effect and extending the service life.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite drive connection mechanism that meets the ultimate short-circuit condition, comprising an electromagnetic component and a manual component, wherein the electromagnetic component includes an electromagnetic base and a moving iron core located within the electromagnetic base and sliding within the electromagnetic base, one end of a first pull rod is connected to a moving contact, and the other end of the first pull rod passes through one end of the electromagnetic base and is fixedly connected to the moving iron core therein, characterized in that, The first pull rod extends from one end connected to the moving iron core and passes through the other end of the electromagnetic base. The manual component is located on the side of the electromagnetic component away from the moving contact. The end of the first pull rod extending from the other end of the electromagnetic base is connected to the manual component. Several auxiliary switches are provided on the other end of the electromagnetic base and next to the first pull rod. The trigger head of each auxiliary switch is arranged facing the first pull rod. Several lever actuation components corresponding to the auxiliary switches are provided at the end of the first pull rod connected to the manual component. When the first pull rod is moved, the lever actuation components selectively trigger the corresponding auxiliary switches.

2. The composite drive connection mechanism for meeting the ultimate short-circuit condition according to claim 1, characterized in that, Both ends of the electromagnetic base are provided with guide holes. The middle part of the first pull rod is located inside the electromagnetic base and is connected to the moving iron core inside the electromagnetic base. Both ends of the first pull rod pass through the two guide holes respectively.

3. The composite drive connection mechanism for meeting the ultimate short-circuit condition according to claim 1, characterized in that, The lever actuation assembly includes a trigger limiter, a lever seat, and a lever. The trigger limiter is fixedly sleeved on the first pull rod. The lever seat is installed on the electromagnetic seat and located beside the first pull rod. The middle part of the lever is hinged to the lever seat. One end of the lever is connected to the trigger limiter, and the other end of the lever selectively contacts the trigger head of the auxiliary switch.

4. The composite drive connection mechanism for meeting the ultimate short-circuit condition according to claim 1, characterized in that, The auxiliary switches are divided into several groups, each group including two auxiliary switches, and the two auxiliary switches in the same group are symmetrically arranged on both sides of the first pull rod.

5. The composite drive connection mechanism for meeting the ultimate short-circuit condition according to claim 3, characterized in that, The trigger limiting member is a ring structure, and a ring groove is formed on the outer wall of the trigger limiting member along its circumference. One end of the lever is spherical or cylindrical and extends into the ring groove.

6. The composite drive connection mechanism for meeting the ultimate short-circuit condition according to claim 3, characterized in that, The lever has a trigger ramp at one end that selectively contacts the trigger head of the trigger switch.

7. The composite drive connection mechanism for meeting the ultimate short-circuit condition according to claim 1, characterized in that, The electromagnetic base has a support column on the side opposite to the manual component. The support columns are all arranged along the axial direction of the first pull rod, and one end of the support column is connected to the electromagnetic base.

8. The composite drive connection mechanism for meeting the ultimate short-circuit condition according to claim 1, characterized in that, An insulating element is provided between the first pull rod and the moving contact.

9. The composite drive connection mechanism for meeting the ultimate short-circuit condition according to claim 1, characterized in that, An overtravel assembly is provided between the insulating component and the first pull rod. The overtravel assembly includes a second pull rod, a spring, and a limiting member. One end of the first pull rod connected to the insulating component has a telescopic hole along its axial direction. One end of the second pull rod is inserted into the telescopic hole, and a protruding retaining edge is provided on the outer wall of the end of the second pull rod inserted into the telescopic hole. The spring is disposed in the telescopic hole and sleeved on the outside of the second pull rod. The two ends of the spring abut against the bottom of the telescopic hole and the retaining edge, respectively. The limiting member is provided at the opening of the telescopic hole. One end of the second pull rod passes through the limiting member and connects to the insulating component. The side of the retaining edge away from the spring abuts against the limiting member.

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