Segmented adjustable air gap resistor

Abstract

The utility model discloses segmented adjustable air gap's resistor, including resistor and fixed frame, be equipped with multiple groups equidistance distribution's adjusting frame on the fixed frame, multiple groups adjusting frame are corresponded to set with resistor, the fixed frame is slidably installed with two groups symmetrical distribution's guide frame, fixed mounting has the mounting rod in the fixed frame, the first telescopic link of two groups symmetrical distribution is slidably installed in the mounting rod, the second telescopic link is slidably installed in two groups first telescopic link, through the equidistance adjusting structure between multiple groups adjusting frame, has realized the nimble accurate control of resistor air gap, through the motor drive second bevel gear rotation in the mounting rod, drive first bevel gear and bidirectional screw rod rotation, utilize the sliding fit relation of key groove and key block, drive two groups screw pipe synchronous rotation, and then make first telescopic link and second telescopic link coordinated telescopic, promote both sides guide frame along fixed frame sliding, realize the synchronous, equidistance change of multiple groups adjusting frame between interval finally.

Description

Technical Field

[0001] This utility model relates to the field of resistor technology, specifically to a segmented adjustable air gap resistor. Background Technology

[0002] As a key basic component in circuit systems, resistors directly affect the efficiency of power conversion, the accuracy of signal conditioning, and the stability of system operation. In fields such as power electronic equipment, industrial automation control, new energy power generation systems, and precision instruments, resistors undertake important functions such as current limiting, voltage division, energy dissipation, and signal matching. With the development of modern electronic technology towards higher frequencies and higher power, the working environment of resistors is becoming increasingly harsh, placing higher demands on their electrical performance, thermal stability, and mechanical reliability.

[0003] Traditional resistors typically have a fixed air gap structure. The inability to adjust the air gap limits the range of resistance value variation, making it difficult to meet the requirements of precision control. Furthermore, the fixed air gap has low heat dissipation efficiency. In high-voltage, high-current, or frequently changing load applications, the fixed air gap structure is prone to problems such as excessive local temperature rise and thermal stress concentration, which not only reduces energy efficiency but also shortens the life of the device. Summary of the Invention

[0004] The purpose of this invention is to provide a segmented adjustable air gap resistor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a segmented adjustable air gap resistor, including a resistor and a fixing frame. The fixing frame is provided with multiple sets of equidistantly distributed adjusting frames, each set corresponding to the resistor. Two sets of symmetrically distributed guide frames are slidably mounted on the fixing frame. An installation rod is fixedly mounted inside the fixing frame. Two sets of symmetrically distributed first telescopic rods slide within the installation rod. A second telescopic rod is slidably mounted within each of the two sets of first telescopic rods. The end of the second telescopic rod furthest from the installation rod is fixedly connected to a corresponding guide frame. The two outer sets of adjusting frames are fixedly connected to two corresponding guide frames. Multiple inner sets of adjusting frames are slidably connected to the fixing frame and guide frames. Two sets of intersecting first connecting frames and two sets of intersecting second connecting frames are provided between adjacent sets of adjusting frames.

[0006] As a further preferred embodiment of this technical solution, the two sets of first connecting frames are rotatably connected to the two corresponding sets of second connecting frames via rotating shafts. The left ends of the two sets of first connecting frames are rotatably connected via rotating shafts, and the right ends of the two sets of first connecting frames are rotatably mounted with sliders. The sliders are slidably connected to the corresponding set of adjusting frames.

[0007] As a further preferred embodiment of this technical solution, the right ends of the two sets of second connecting frames are rotatably connected by a rotating shaft, and the left ends of the two sets of second connecting frames are rotatably connected to the corresponding adjusting frame by a rotating shaft.

[0008] As a further preferred embodiment of this technical solution, a bidirectional screw is rotatably installed inside the mounting rod, a first bevel gear is sleeved on the bidirectional screw, and a second bevel gear is rotatably installed inside the mounting rod. The second bevel gear meshes with the first bevel gear. A screw tube is rotatably installed inside each of the two sets of first telescopic rods. The two ends of the bidirectional screw pass through the two sets of first telescopic rods respectively and are threadedly connected to the two sets of first telescopic rods respectively. The two sets of screw tubes pass through the corresponding second telescopic rods respectively and are threadedly connected to the corresponding second telescopic rods.

[0009] As a further preferred embodiment of this technical solution, the bidirectional screw is provided with two sets of symmetrically distributed keyways, and the spiral tube is provided with two sets of symmetrically distributed key blocks. The key blocks and keyways are correspondingly arranged, and the spiral tube is slidably sleeved with the bidirectional screw through the key blocks and keyways.

[0010] As a further preferred embodiment of this technical solution, each of the multiple sets of adjustment frames is fixedly installed with a positioning seat, an installation ring is rotatably installed inside the positioning seat, a toothed ring is sleeved on the installation ring, and multiple sets of annularly distributed limiting plates are provided inside the positioning seat. Each of the multiple sets of limiting plates is rotatably connected to the positioning seat through an installation shaft, and a torsion spring is sleeved on each of the multiple sets of installation shafts. The two ends of the torsion spring are fixedly connected to the limiting plate and the positioning seat, respectively.

[0011] As a further preferred embodiment of this technical solution, multiple sets of mounting shafts are distributed in a ring around the mounting ring, and gears are sleeved on each set of mounting shafts, with each set of gears meshing with the gear ring.

[0012] This invention provides a segmented adjustable air gap resistor, which has the following advantages: (1) This utility model achieves flexible and precise control of the air gap of the resistor through the equidistant adjustment structure between multiple sets of adjustment frames. The motor inside the mounting rod drives the second bevel gear to rotate, which in turn drives the first bevel gear and the bidirectional screw to rotate. By utilizing the sliding fit between the keyway and the key block, the two sets of solenoids are driven to rotate synchronously, thereby enabling the first telescopic rod and the second telescopic rod to extend and retract in coordination, pushing the guide frames on both sides to slide along the fixed frame. Finally, the synchronous and equidistant change of the distance between multiple sets of adjustment frames is achieved. This structure not only significantly expands the adjustable range of the resistance value and meets the requirements of precision control, but also effectively improves the heat dissipation conditions by uniformly adjusting the air gap, avoiding the problems of excessive local temperature rise and thermal stress concentration, and improving the operational reliability and service life of the device under high voltage, high current and frequent load changes.

[0013] (2) This utility model has a positioning seat structure on the adjustment frame specifically for installing and fixing resistors, which realizes the quick, flexible installation and stable fixing of resistors. The rotation of a set of mounting shafts in the positioning seat drives the gears on it to rotate. The gears mesh with the gear ring to drive the rotation of multiple sets of ring-shaped limiting plates, thereby clamping or releasing the resistors in coordination. The clamping mechanism is easy to operate and has a uniform and reliable clamping force. It not only ensures the stability of the resistors during the adjustment process, but also facilitates their maintenance and replacement, further improving the practicality and maintainability of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the structural separation of the fixing frame and the adjusting frame of this utility model; Figure 3 For the present utility model Figure 2 Enlarged view of the structure at point A; Figure 4 This is a schematic diagram of the positioning seat of this utility model; Figure 5 For the present utility model Figure 4 Enlarged view of the structure at point -B; In the diagram: 1. Resistor; 2. Fixing frame; 3. Adjusting frame; 4. Positioning seat; 5. Guide frame; 6. Mounting rod; 7. First telescopic rod; 8. Second telescopic rod; 9. Bidirectional screw; 10. First bevel gear; 11. Second bevel gear; 12. Keyway; 13. Screw tube; 14. Key block; 15. Second connecting frame; 16. Mounting ring; 17. Gear ring; 18. Limiting plate; 19. Mounting shaft; 20. Gear; 21. Torsion spring; 22. First connecting frame; 23. Slider. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] This utility model provides a technical solution: such as Figure 1 , Figure 2 and Figure 3As shown, in this embodiment, the segmented adjustable air gap resistor includes a resistor 1 and a fixing frame 2. The fixing frame 2 has multiple sets of equidistantly distributed adjusting frames 3, each corresponding to the resistor 1. Two sets of symmetrically distributed guide frames 5 are slidably mounted on the fixing frame 2. An installation rod 6 is fixedly mounted inside the fixing frame 2. Two sets of symmetrically distributed first telescopic rods 7 slide within the installation rod 6. Second telescopic rods 8 are slidably mounted within each of the two sets of first telescopic rods 7. The end of the second telescopic rod 8 furthest from the installation rod 6 is fixedly connected to the corresponding guide frame 5. The two outer sets of adjusting frames 3 are fixedly connected to the two corresponding guide frames 5. The multiple inner sets of adjusting frames 3 are slidably connected to the fixing frame 2 and the guide frames 5. A space is provided between adjacent sets of adjusting frames 3. Two sets of intersecting first connecting frames 22 and two sets of intersecting second connecting frames 15 are provided. The two sets of first connecting frames 22 are rotatably connected to the corresponding two sets of second connecting frames 15 via rotating shafts. The left ends of the two sets of first connecting frames 22 are rotatably connected via rotating shafts. The right ends of the two sets of first connecting frames 22 are rotatably mounted with sliders 23, which are slidably connected to the corresponding set of adjusting frames 3. The right ends of the two sets of second connecting frames 15 are rotatably connected via rotating shafts. The left ends of the two sets of second connecting frames 15 are rotatably connected to the corresponding adjusting frames 3 via rotating shafts. A bidirectional screw 9 is rotatably mounted inside the mounting rod 6. A first bevel gear 10 is sleeved on the bidirectional screw 9. A second bevel gear 11 is rotatably mounted inside the mounting rod 6, and the second bevel gear 11 meshes with the first bevel gear 10. Next, each of the two sets of first telescopic rods 7 has a screw tube 13 rotatably installed inside. The two ends of the bidirectional screw 9 pass through the two sets of first telescopic rods 7 and are threadedly connected to the two sets of first telescopic rods 7 respectively. The two sets of screw tubes 13 pass through the corresponding second telescopic rods 8 and are threadedly connected to the corresponding second telescopic rods 8. The bidirectional screw 9 has two sets of symmetrically distributed keyways 12. The screw tubes 13 have two sets of symmetrically distributed key blocks 14. The key blocks 14 and keyways 12 are correspondingly arranged. The screw tubes 13 are slidably sleeved with the bidirectional screw 9 through the key blocks 14 and keyways 12. The drive motor in the mounting rod 6 drives the second bevel gear 11 to rotate, and the first bevel gear 10 meshing with it rotates accordingly, driving the bidirectional screw 9 to rotate around its own axis. Because the two ends of the bidirectional screw 9 are threaded... The spirals are opposite in direction and slide with the key block 14 inside the screw tube 13 through the keyway 12. The two sets of screw tubes 13 rotate synchronously with the bidirectional screw 9. The rotation of the bidirectional screw 9 and the screw tube 13 is further transmitted through the threaded transmission, causing the two-stage telescopic mechanism composed of the first telescopic rod 7 and the second telescopic rod 8 to produce a coordinated telescopic movement. The end of the second telescopic rod 8 is fixedly connected to the guide frame 5, thereby pushing the guide frames 5 on both sides to slide in opposite directions along the fixed frame 2. This movement is transmitted evenly to all the adjusting frames 3 through a linkage mechanism composed of the first connecting frame 22, the second connecting frame 15 and the slider 23, thereby realizing the equidistant expansion or contraction of the air gap between all adjacent adjusting frames 3, thus accurately adjusting the resistance value and optimizing the heat dissipation path.

[0017] like Figure 4 and Figure 5 As shown, each of the multiple sets of adjusting frames 3 is fixedly mounted with a positioning seat 4. An installation ring 16 is rotatably mounted inside the positioning seat 4. A gear ring 17 is sleeved on the installation ring 16. The positioning seat 4 is provided with multiple sets of annularly distributed limiting plates 18. The multiple sets of limiting plates 18 are rotatably connected to the positioning seat 4 through the mounting shaft 19. Each set of mounting shaft 19 is sleeved with a torsion spring 21. The two ends of the torsion spring 21 are fixedly connected to the limiting plate 18 and the positioning seat 4, respectively. The multiple sets of mounting shaft 19 are annularly distributed around the mounting ring 16. Each set of mounting shaft 19 is sleeved with a gear 20. The multiple sets of gears 20 are meshed with the gear ring 17. When the resistor 1 is installed on the adjusting frame 3, one set of mounting shaft 19 is manually rotated. The gear 20 on the mounting shaft 19 rotates accordingly. Since all gears 20 are meshed with the central gear ring 17, the rotation of a single gear 20 will drive the gear ring 17 to rotate. The rotation of the gear ring 17 synchronously drives all the circumferentially distributed gears 20 and their mounting shafts 19 to rotate together, thereby causing the limiting plates 18 fixed on each mounting shaft 19 to swing outwards simultaneously, inserting the cylindrical resistor 1 into the mounting ring 16 of the positioning seat 4. After the mounting shaft 19 is released, multiple sets of limiting plates 18 rotate inwards synchronously under the action of the torsion spring 21, forming a uniform annular enclosure and clamping of the resistor 1. The preload provided by the torsion spring 21 ensures the self-locking and reliability of the clamping. When disassembling, simply turn the mounting shaft 19 in the opposite direction to make all the limiting plates 18 open synchronously, releasing the resistor 1, thus realizing the rapid, flexible installation and stable fixation of the resistor 1.

[0018] This utility model provides a segmented adjustable air gap resistor. Its specific working principle is as follows: The drive motor inside the mounting rod 6 drives the second bevel gear 11 to rotate, and the first bevel gear 10 meshing with it rotates accordingly, driving the bidirectional screw 9 to rotate around its own axis. Since the threads at both ends of the bidirectional screw 9 have opposite directions of rotation, and are slidably engaged with the key block 14 inside the screw tube 13 via the keyway 12, the two sets of screw tubes 13 rotate synchronously with the bidirectional screw 9. The rotation of the bidirectional screw 9 and the screw tubes 13 is further transmitted through the threaded transmission, causing the two-stage telescopic mechanism composed of the first telescopic rod 7 and the second telescopic rod 8 to produce a coordinated telescopic movement. The end of the second telescopic rod 8 is connected to the guide... The frame 5 is fixedly connected, thereby pushing the guide frames 5 on both sides to slide towards or away from each other along the fixed frame 2. This movement is transmitted evenly to all the adjusting frames 3 through a linkage mechanism consisting of the first connecting frame 22, the second connecting frame 15 and the slider 23. This achieves the equal expansion or contraction of the air gap between all adjacent adjusting frames 3, thereby accurately adjusting the resistance value and optimizing the heat dissipation path. When the resistor 1 is installed on the adjusting frame 3, one set of mounting shafts 19 is manually rotated. The gear 20 on the mounting shaft 19 rotates accordingly. Since all gears 20 mesh with the central gear ring 17, the rotation of a single gear 20 will drive the gear ring 17 to rotate. The rotation of the gear ring 17 synchronously drives all the circumferentially distributed gears 20 and their mounting shafts 19 to rotate together, thereby causing the limiting plates 18 fixed on each mounting shaft 19 to swing outwards simultaneously, inserting the cylindrical resistor 1 into the mounting ring 16 of the positioning seat 4. After the mounting shaft 19 is released, multiple sets of limiting plates 18 rotate inwards synchronously under the action of the torsion spring 21, forming a uniform annular enclosure and clamping of the resistor 1. The preload provided by the torsion spring 21 ensures the self-locking and reliability of the clamping. When disassembling, simply turn the mounting shaft 19 in the opposite direction to make all the limiting plates 18 open synchronously, releasing the resistor 1, thus realizing the rapid, flexible installation and stable fixation of the resistor 1.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A segmented adjustable air gap resistor, comprising a resistor (1) and a mounting bracket (2), characterized in that: The fixed frame (2) is provided with multiple sets of equidistantly distributed adjustment frames (3), and the multiple sets of adjustment frames (3) are correspondingly arranged with resistors (1). Two sets of symmetrically distributed guide frames (5) are slidably installed on the fixed frame (2). An installation rod (6) is fixedly installed inside the fixed frame (2). Two sets of symmetrically distributed first telescopic rods (7) slide inside the installation rod (6). A second telescopic rod (8) is slidably installed inside each of the two sets of first telescopic rods (7). The end of the second telescopic rod (8) away from the installation rod (6) is fixedly connected to the corresponding guide frame (5). The two sets of adjustment frames (3) on the outer side are fixedly connected to the two sets of corresponding guide frames (5). The multiple sets of adjustment frames (3) on the inner side are slidably connected to the fixed frame (2) and the guide frame (5). Two sets of cross-distributed first connecting frames (22) and two sets of cross-distributed second connecting frames (15) are provided between two adjacent sets of adjustment frames (3).

2. The segmented adjustable air gap resistor according to claim 1, characterized in that: The two sets of first connecting frames (22) are rotatably connected to the two sets of second connecting frames (15) via rotating shafts. The left ends of the two sets of first connecting frames (22) are rotatably connected via rotating shafts. The right ends of the two sets of first connecting frames (22) are rotatably mounted with sliders (23). The sliders (23) are slidably connected to the corresponding set of adjusting frames (3).

3. The segmented adjustable air gap resistor according to claim 1, characterized in that: The right ends of the two sets of second connecting frames (15) are rotatably connected by a rotating shaft, and the left ends of the two sets of second connecting frames (15) are rotatably connected to the corresponding adjusting frame (3) by a rotating shaft.

4. The segmented adjustable air gap resistor according to claim 1, characterized in that: A bidirectional screw (9) is rotatably installed inside the mounting rod (6). A first bevel gear (10) is sleeved on the bidirectional screw (9). A second bevel gear (11) is rotatably installed inside the mounting rod (6). The second bevel gear (11) meshes with the first bevel gear (10). A screw tube (13) is rotatably installed inside each of the two sets of first telescopic rods (7). The two ends of the bidirectional screw (9) pass through the two sets of first telescopic rods (7) and are threadedly connected to the two sets of first telescopic rods (7). The two sets of screw tubes (13) pass through the corresponding second telescopic rods (8) and are threadedly connected to the corresponding second telescopic rods (8).

5. The segmented adjustable air gap resistor according to claim 4, characterized in that: The bidirectional screw (9) has two sets of symmetrically distributed keyways (12), and the solenoid (13) has two sets of symmetrically distributed key blocks (14). The key blocks (14) and keyways (12) are arranged correspondingly, and the solenoid (13) is slidably connected to the bidirectional screw (9) through the key blocks (14) and keyways (12).

6. The segmented adjustable air gap resistor according to claim 1, characterized in that: Each of the multiple sets of adjustment frames (3) is fixedly installed with a positioning seat (4). An installation ring (16) is rotatably installed inside the positioning seat (4). A toothed ring (17) is sleeved on the installation ring (16). Multiple sets of annularly distributed limiting plates (18) are provided inside the positioning seat (4). The multiple sets of limiting plates (18) are rotatably connected to the positioning seat (4) through the installation shaft (19). A torsion spring (21) is sleeved on each of the multiple sets of installation shafts (19). The two ends of the torsion spring (21) are fixedly connected to the limiting plate (18) and the positioning seat (4) respectively.

7. The segmented adjustable air gap resistor according to claim 6, characterized in that: Multiple sets of mounting shafts (19) are distributed in a ring around the mounting ring (16), and gears (20) are sleeved on each set of mounting shafts (19). Each set of gears (20) is meshed with a gear ring (17).

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