Compression spring installation system for direct current contactor

Abstract

A pressure spring installation system for a direct current contactor comprises an installation rack and a supporting frame, a direct current contactor containing groove is formed in the upper end of the installation rack, a moving contact assembly is placed in the direct current contactor containing groove, a first three-axis air cylinder is fixedly installed on the side face of the supporting frame, and the upper end of the first three-axis air cylinder is connected with an installation base through a piston rod. A second three-axis air cylinder is fixedly installed at the upper end of the installation base, the front side of the second three-axis air cylinder is connected with an L-shaped supporting rod through a piston rod, a spring pressing piece is fixedly installed at the lower end of the L-shaped supporting rod, and the spring pressing piece makes contact with a compressed spring in the moving contact assembly. According to the utility model, the defects in the prior art are overcome, the pressure spring can be rapidly and stably installed in place, the close fit between the moving contacts is ensured, the stability and reliability of the whole structure are improved, and the production working efficiency of the direct current contactor is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of DC contactor technology, and specifically to a spring mounting system for DC contactors. Background Technology

[0002] DC contactors are widely used in battery-powered vehicles to control various actions such as starting and speed regulation. A typical DC contactor consists of a coil and external magnetic circuit, an arc-extinguishing chamber, stationary contacts, moving contacts, movable components, a permanent magnet, and a plastic housing. They are primarily used in electric vehicles, charging stations, photovoltaic systems, and energy storage. Their working principle is as follows: when the contactor coil is energized, the coil generates a magnetic field that drives the moving iron core upwards. The moving iron core, through a push rod, causes the moving contact to move upwards synchronously, making contact with the stationary contact to achieve conductivity, thus enabling a small current to control a large current. The compression spring plays a crucial supporting role in the moving contact assembly, ensuring stable contact between the moving and stationary contacts and preventing poor contact due to vibration or current surges, thereby guaranteeing the reliability and safety of the DC contactor in various application scenarios.

[0003] Currently, the installation of pressure springs in DC contactors typically involves manually inserting the spring into the moving contact assembly and then manually adjusting it to the predetermined position. This process is prone to causing the spring to be improperly installed or tilted, affecting the normal operation of the contactor. Furthermore, it is time-consuming, labor-intensive, and inefficient. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a spring mounting system for DC contactors. It overcomes the deficiencies of existing technologies, has a reasonable design, and enables the spring to be installed quickly and stably, ensuring a tight fit between moving contacts, improving the stability and reliability of the overall structure, and thus effectively improving the production efficiency of DC contactors.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A DC contactor spring mounting system includes a mounting platform and a support frame. The upper end of the mounting platform has a DC contactor placement slot, in which a moving contact assembly is placed. A first three-axis cylinder is fixedly mounted on the side of the support frame. The upper end of the first three-axis cylinder is connected to a mounting base via a piston rod. A second three-axis cylinder is fixedly mounted on the upper end of the mounting base. The front side of the second three-axis cylinder is connected to an L-shaped support rod via a piston rod. A spring pressing plate is fixedly mounted on the lower end of the L-shaped support rod, and the spring pressing plate contacts the spring in the moving contact assembly.

[0007] Preferably, the moving contact assembly includes a push rod and a moving contact. The lower end of the push rod is connected to the moving iron core of the DC contactor. The moving iron core is movably installed inside the iron core sleeve, which is fixedly installed on the lower surface of the coil end cover. The upper end of the push rod passes through the coil end cover and is fixedly mounted with an insulating base. A contact clamp is fixedly installed on the insulating base. The insulating base and the contact clamp form a hollow mounting cavity with openings on both sides. The lower half of the two side walls of the contact clamp are configured as outwardly protruding arc-shaped tabs. A contact positioning component is installed inside the hollow mounting cavity. A compression spring is installed between the lower surface of the contact positioning component and the upper surface of the insulating base. An armature block is installed above the inner wall of the contact clamp. The moving contact is installed between the contact positioning component and the armature block. Contact blocks are provided on both the left and right sides of the upper surface of the contact positioning component. The upper surface of the contact block is in contact with the lower surface of the armature block. Both the contact positioning component and the armature block are metal parts. Insertion holes are opened on both sides of the contact clamp. The end of the spring pressing plate passes through the insertion hole and is in contact with the upper surface of the compression spring. The coil end cover is fixedly installed in the DC contactor placement slot.

[0008] Preferably, a positioning rod is fixedly installed on one side of the upper surface of the spring pressing piece, and arc surfaces are provided at both ends of the moving contact, with the positioning rod in contact with the arc surfaces.

[0009] Preferably, the lower surface of the moving contact is provided with positioning shafts on both the left and right sides, and the left and right sides of the contact positioning member are provided with positioning grooves at corresponding positions, and the positioning shafts match the positioning grooves; the upper surface of the armature block is provided with limiting shafts on both the left and right sides, and the upper surface of the contact clamp is provided with limiting holes at corresponding positions, and the limiting shafts and limiting holes are engaged and movably inserted.

[0010] This invention provides a system for installing a pressure spring in a DC contactor, offering the following advantages: A DC contactor placement slot is used to limit the position of the coil end cover. A first and second triaxial cylinder are controlled to insert the end of the spring pressing plate into the insertion hole and contact the upper surface of the pressure spring. The piston rod of the first triaxial cylinder retracts, causing the second triaxial cylinder and the L-shaped support rod to descend, pressing the spring pressing plate down on the pressure spring. This creates a space between the pressure spring and the upper surface of the contact clamp's inner cavity, allowing the moving contact to be inserted from the left or right opening of the contact clamp into the space above the pressure spring. The first triaxial cylinder then moves the spring pressing plate upwards, gradually resetting the pressure spring until its upper end abuts against a predetermined position. Finally, the piston rod of the second triaxial cylinder retracts, completing the precise positioning and installation of the pressure spring. This precise positioning and installation effectively ensures the stability of the pressure spring within the contact clamp's inner cavity, improving the contactor's operational reliability. Furthermore, the entire process only requires controlling the extension and retraction of the first and second three-axis cylinders, making it easy to operate, highly efficient, and ensuring precise coordination of all components to achieve optimal working conditions. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of the prior art will be briefly introduced below.

[0012] Figure 1 A schematic diagram of the structure of this utility model;

[0013] Figure 2 A schematic diagram of the mounting frame and support frame in this utility model;

[0014] Figure 3 A schematic diagram of the moving contact assembly in this utility model;

[0015] Figure 4 A schematic diagram of the cross-sectional structure of the moving contact assembly in this utility model;

[0016] Figure 5 A schematic diagram showing the unfolded structure of the contact clamp, armature block, moving contact, and contact positioning component in this utility model;

[0017] Explanation of the labels in the diagram:

[0018] 1. Mounting stand; 2. DC contactor placement slot; 3. Moving contact assembly; 4. First three-axis cylinder; 5. Mounting base; 6. Second three-axis cylinder; 7. L-shaped support rod; 8. Spring pressing plate; 9. Positioning rod; 10. Support frame; 31. Push rod; 32. Moving contact; 33. Insulating base; 34. Contact clamp; 35. Arc-shaped protrusion; 36. Contact positioning component; 37. Armature block; 38. Contact block; 39. Compression spring; 310. Core sleeve; 311. Coil end cover; 312. Insertion hole; 313. Positioning groove; 314. Limiting shaft; 315. Limiting hole. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0020] Example 1, as Figure 1-5As shown, a DC contactor spring mounting system includes a mounting frame 1 and a support frame 10. The upper end of the mounting frame 1 has a DC contactor placement slot 2, in which a moving contact assembly 3 is placed. A first three-axis cylinder 4 is fixedly mounted on the side of the support frame 10. The upper end of the first three-axis cylinder 4 is connected to a mounting base 5 via a piston rod. A second three-axis cylinder 6 is fixedly mounted on the upper end of the mounting base 5. The front side of the second three-axis cylinder 6 is connected to an L-shaped support rod 7 via a piston rod. A spring pressing plate 8 is fixedly mounted on the lower end of the L-shaped support rod 7. The spring pressing plate 8 contacts the spring in the moving contact assembly 3. Specifically, a strip-shaped pressing plate can be provided at the front end of the spring pressing plate 8, which extends into the moving contact assembly 3 and contacts the spring.

[0021] The moving contact assembly 3 includes a push rod 31 and a moving contact 32. The lower end of the push rod 31 is connected to the moving iron core of the DC contactor. The moving iron core is movably installed inside the iron core sleeve 310. The iron core sleeve 310 is fixedly installed on the lower surface of the coil end cover 311. The upper end of the push rod 31 passes through the coil end cover 311 and is fixedly installed with an insulating base 33. A contact clamp 34 is fixedly installed on the insulating base 33. The insulating base 33 and the contact clamp 34 form a hollow mounting cavity with openings on both sides. The lower half of the two side walls of the contact clamp 34 are set as outwardly protruding arc-shaped protrusions 35. A contact positioning component 36 is installed in the hollow mounting cavity. A compression spring 39 is installed between the lower surface of the positioning component 36 and the upper surface of the insulating base 33. An armature block 37 is installed above the inner wall of the contact clamp 34. The moving contact 32 is installed between the contact positioning component 36 and the armature block 37. Contact blocks 38 are provided on both the left and right sides of the upper surface of the contact positioning component 36. The upper surface of the contact block 38 is in contact with the lower surface of the armature block 37. Both the contact positioning component 36 and the armature block 37 are metal parts. Insertion holes 312 are opened on both sides of the contact clamp 34. The end of the spring pressing piece 8 passes through the insertion hole 312 and is in contact with the upper surface of the compression spring 39. The coil end cover 311 is fixedly installed in the DC contactor placement slot 2.

[0022] Working principle:

[0023] In actual use, firstly, the lower end of the push rod 31 is assembled with the moving iron core and then inserted into the iron core sleeve 310. Then, the iron core sleeve 310 is fixed to the lower surface of the coil end cover 311, and the upper end of the push rod 31 passes through the coil end cover 311 and is connected to the insulating base 33. Then, the contact clamp 34 is assembled on the upper part of the insulating base 33. Then, the compression spring 39 is installed in the hollow mounting cavity formed by the insulating base 33 and the contact clamp 34, and the lower end of the compression spring 39 is installed at the center of the upper surface of the insulating base 33. In this embodiment, a protrusion can be provided in the middle of the upper surface of the insulating base 33, so that the lower end of the compression spring 39 is sleeved on the outer surface of the protrusion, thereby achieving precise positioning of the compression spring 39 through the protrusion.

[0024] Next, the entire coil end cap 311 is placed into the DC contactor placement slot 2, which is used to limit the coil end cap 311. Then, the piston rod of the first three-axis cylinder 4 is controlled to extend and retract, thereby driving the entire second three-axis cylinder 6 and L-shaped support rod 7 to move up and down, so that the spring pressing plate 8 corresponds to the vertical position of the insertion hole 312. Then, the second three-axis cylinder 6 is activated, so that the piston rod of the second three-axis cylinder 6 drives the spring pressing plate 8 to extend forward until the end of the spring pressing plate 8 penetrates into the insertion hole 312 and contacts the upper surface of the compression spring 39. Then, the piston rod of the first three-axis cylinder 4 is controlled to retract, thereby driving the second three-axis cylinder 6 and L-shaped support rod 7 to descend, so that the spring pressing plate 8 presses down on the compression spring 39, thereby leaving a space between the compression spring 39 and the upper surface of the inner cavity of the contact clamp 34, so as to facilitate the subsequent installation of the moving contact 32.

[0025] After the moving contact 32 is installed in conjunction with the contact positioning component 36 and the armature block 37, the entire assembly is inserted from the left or right opening of the contact clamp 34 into the space reserved above the compression spring 39. The piston rod of the first three-axis cylinder 4 extends, causing the second three-axis cylinder 6 and the L-shaped support rod 7 to rise, moving the spring pressing plate 8 upwards. The compression spring 39 gradually returns to its original position, ultimately causing its upper end to abut against the predetermined position. Then, the piston rod of the second three-axis cylinder 6 retracts, disengaging the spring pressing plate 8 from the insertion hole 312, thus ensuring that the upper end of the compression spring 39 is in close contact with the center of the contact positioning component 36. This completes the precise positioning and installation of the compression spring 39. This precise positioning and installation effectively ensures the stability of the compression spring 39 within the contact clamp 34 cavity, improving the reliability of the contactor. Furthermore, the entire process only requires controlling the extension and retraction of the first three-axis cylinder 4 and the second three-axis cylinder 6, making operation simple, efficient, and ensuring precise coordination of all components to achieve optimal working condition.

[0026] In Example 2, as a further preferred embodiment of Example 1, a positioning rod 9 is fixedly installed on one side of the upper surface of the spring pressing plate 8. Both ends of the moving contact 32 have arc-shaped surfaces, and the positioning rod 9 contacts these arc-shaped surfaces. By setting the positioning rod 9 to cooperate with the end face of the moving contact 32, when the piston rod of the second three-axis cylinder 6 drives the spring pressing plate 8 to extend forward, the positioning rod 9 can precisely align with the end face of the moving contact 32, ensuring the stable position of the moving contact 32 during the extension of the spring pressing plate 8. This further optimizes the fitting accuracy between the compression spring 39 and the inner cavity of the contact clamp 34, improving the overall installation stability and the reliability of the contactor.

[0027] In Example 3, as a further preferred embodiment of Example 1, positioning shafts are provided on both the left and right sides of the lower surface of the moving contact 32, and positioning grooves 313 are provided on the corresponding positions on the left and right sides of the contact positioning component 36. The positioning shafts and positioning grooves 313 are matched. Limiting shafts 314 are provided on both the left and right sides of the upper surface of the armature block 37, and limiting holes 315 are provided on the corresponding positions on the left and right sides of the upper surface of the contact clamp 34. The limiting shafts 314 and limiting holes 315 are engaged and movably inserted. Therefore, the precise positioning of the moving contact 32 and the contact positioning component 36 can be achieved through the matching of the positioning shafts and positioning grooves 313. When the contact positioning component 36, the moving contact 32, and the armature block 37 are placed as a whole into the space reserved above the compression spring 39, the precise matching of the limiting shafts 314 and limiting holes 315 ensures the precise positioning of the entire assembly. This ensures that each component remains stable during installation, avoids poor contact caused by positional deviations, and further improves the service life and working efficiency of the contactor.

[0028] Example 3: This utility model also discloses a method for mounting a DC contactor spring, which utilizes the aforementioned DC contactor spring mounting system. Specifically, it includes the following steps:

[0029] Step S1: Assemble the push rod 31, moving iron core, iron core sleeve 310, coil end cover 311, insulating base 33 and contact clamp 34 in sequence to ensure that each component fits tightly; then install the compression spring 39 in the hollow mounting cavity formed by the insulating base 33 and the contact clamp 34, and install the lower end of the compression spring 39 at the designated position on the upper surface of the insulating base 33.

[0030] Step S2: Place the coil end cover 311 vertically into the DC contactor placement slot 2, and use the DC contactor placement slot 2 to limit and fix the coil end cover 311.

[0031] Step S3: Start the first three-axis cylinder 4 to drive the spring pressing plate 8 to move up and down, so that the spring pressing plate 8 corresponds to the upper and lower positions of the insertion hole 312. Then start the second three-axis cylinder 6 to drive the spring pressing plate 8 to extend forward through the piston rod of the second three-axis cylinder 6 until the end of the spring pressing plate 8 penetrates into the insertion hole 312 and contacts the upper surface of the compression spring 39.

[0032] Step S4: Restart the first three-axis cylinder 4 to drive the spring pressing plate 8 to move downward through the piston rod, so that the spring pressing plate 8 presses down the compression spring 39, leaving a space between the compression spring 39 and the upper surface of the inner cavity of the contact clamp 34;

[0033] Step S5: Install the moving contact 32 between the contact positioning member 36 and the armature block 37. Then, insert the installed contact positioning member 36, moving contact 32 and armature block 37 into the space reserved above the compression spring 39 from the left or right opening of the contact clamp 34, and limit the left and right positions.

[0034] Specifically, in this embodiment, positioning shafts are provided on both the left and right sides of the lower surface of the moving contact 32, and positioning grooves 313 are provided on the corresponding positions on the left and right sides of the contact positioning member 36. The positioning shafts and positioning grooves 313 are matched. Limiting shafts 314 are provided on both the left and right sides of the upper surface of the armature block 37, and limiting holes 315 are provided on the corresponding positions on the left and right sides of the upper surface of the contact clamp 34. The limiting shafts 314 and limiting holes 315 are engaged and movably inserted. Therefore, the precise positioning of the moving contact 32 and the contact positioning member 36 can be achieved by matching the positioning shafts and positioning grooves 313. When the contact positioning member 36, the moving contact 32, and the armature block 37 are placed as a whole in the space reserved above the compression spring 39, the precise engagement of the limiting shafts 314 and limiting holes 315 ensures the precise positioning of the entire assembly.

[0035] Step S6: Start the first three-axis cylinder 4 to drive the spring pressing plate 8 to move upward through the piston rod until the spring pressing plate 8 abuts the entire contact positioning member 36, the moving contact 32 and the armature block 37 against the designated position on the upper surface of the inner cavity of the contact clamp 34.

[0036] Step S7: Start the second three-axis cylinder 6 to retract its piston rod, which will drive the spring pressing plate 8 out of the insertion hole 312, so that the upper end of the compression spring 39 abuts against the lower surface of the contact positioning piece 36, thereby completing the installation and fixing of the compression spring 39;

[0037] Step S8: Remove the moving contact assembly 3 from the DC contactor placement slot 2 as a whole, check whether the connections of each component are secure, and ensure that the compression spring 39 is installed in the correct position.

[0038] The above installation method enables the compression spring 39 to be installed quickly and stably, ensuring a tight fit between the moving contact 32 and the contact positioning component 36, improving the stability and reliability of the overall structure, and thus effectively improving the production efficiency of the DC contactor.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A spring mounting system for a DC contactor, characterized in that: The device includes a mounting frame (1) and a support frame (10). The mounting frame (1) has a DC contactor placement slot (2) at its upper end. A moving contact assembly (3) is placed in the DC contactor placement slot (2). A first three-axis cylinder (4) is fixedly installed on the side of the support frame (10). The upper end of the first three-axis cylinder (4) is connected to the mounting base (5) through a piston rod. A second three-axis cylinder (6) is fixedly installed on the upper end of the mounting base (5). The front side of the second three-axis cylinder (6) is connected to an L-shaped support rod (7) through a piston rod. A spring pressing plate (8) is fixedly installed on the lower end of the L-shaped support rod (7). The spring pressing plate (8) contacts the compression spring in the moving contact assembly (3). The moving contact assembly (3) includes a push rod (31) and a moving contact (32). The lower end of the push rod (31) is connected to the moving iron core of the DC contactor. The moving iron core is movably installed inside the iron core sleeve (310). The iron core sleeve (310) is fixedly installed on the lower surface of the coil end cover (311). The upper end of the push rod (31) passes through the coil end cover (311) and is fixedly installed with an insulating base (33). A contact clamp (34) is fixedly installed on the insulating base (33). The insulating base (33) and the contact clamp (34) form a hollow mounting cavity with openings on both sides. The lower half of the two side walls of the contact clamp (34) is set as an outwardly protruding arc-shaped protrusion (35). A contact positioning component (36) is installed in the hollow mounting cavity. 36) A compression spring (39) is installed between the lower surface and the upper surface of the insulating base (33). An armature block (37) is installed above the inner wall of the contact clamp (34). The moving contact (32) is installed between the contact positioning member (36) and the armature block (37). Contact blocks (38) are provided on both the left and right sides of the upper surface of the contact positioning member (36). The upper surface of the contact block (38) is in contact with the lower surface of the armature block (37). The contact positioning member (36) and the armature block (37) are both metal parts. Insertion holes (312) are provided on both sides of the contact clamp (34). The end of the spring pressing piece (8) passes through the insertion hole (312) and is in contact with the upper surface of the compression spring (39). The coil end cover (311) is fixedly installed in the DC contactor placement slot (2).

2. The DC contactor spring mounting system according to claim 1, characterized in that: A positioning rod (9) is fixedly installed on one side of the upper surface of the spring pressing piece (8), and arc surfaces are provided at both ends of the moving contact (32), and the positioning rod (9) is in contact with the arc surfaces.

3. The DC contactor spring mounting system according to claim 1, characterized in that: The moving contact (32) has a positioning shaft on both the left and right sides of its lower surface, and the contact positioning member (36) has a positioning groove (313) on the left and right sides of its corresponding position. The positioning shaft matches the positioning groove (313). The armature block (37) has a limiting shaft (314) on both the left and right sides of its upper surface, and the contact clamp (34) has a limiting hole (315) on the left and right sides of its upper surface. The limiting shaft (314) and the limiting hole (315) are engaged and movably inserted.

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