A resistor and a processing technology thereof

Abstract

This invention relates to the field of resistive devices, and more specifically to a resistor and its processing technology. A resistor includes a graphite rod with multiple annular grooves on both its left and right sides. Two portal frames are positioned left and right, and each portal frame has sliding posts slidably connected to its front and rear ends. Arc rods are fixed to the opposite ends of the two sliding posts, and the two arc rods are inserted into one of the annular grooves. A resistor processing technology includes the following steps: S1: Part prefabrication: Graphite rod processing: turning annular grooves, square holes, and a center hole; Metal parts: stamping or cutting portal frames and L-shaped frames, tapping the terminals; S2: Conductive component assembly: Arc rods are connected to the portal frames via sliding posts and springs, aligned with the annular grooves of the graphite rod and inserted; Sliding plates are fixed to the round rod, inserted into the center hole of the graphite rod, and connected to the spring and L-shaped frame; S3: Support structure installation: A square rod passes through the square hole of the graphite rod, with its lower end connected to a round seat and a crossbar; The portal frame is slidably attached to the crossbar and fixed with bolts.

Description

Technical Field

[0001] This invention relates to the field of resistive devices, and more specifically to a resistor and its processing technology. Background Technology

[0002] In electronic circuits, resistors are key components for current regulation and voltage division. Graphite-based resistors, due to their low cost and high-temperature resistance, are widely used in simple circuits and high-power applications. However, existing graphite-based resistors suffer from two major problems in practical use: First, the flexibility of resistance adjustment is insufficient. Traditional graphite resistors are mostly designed with fixed resistance values, predetermined by the length and cross-sectional area of ​​the graphite rod, making on-site adjustment impossible according to circuit requirements. While some adjustable resistors adjust resistance by changing the length of the graphite rod through sliding contacts, the contact position between the contacts and the graphite rod is easily affected by vibration and temperature changes, leading to resistance fluctuations and failing to meet the stability requirements of precision circuits. Second, the connection stability between the graphite rod and conductive metal components is poor. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a resistor and its processing technology, which has the advantages of allowing adjustment of the resistance value and ensuring a stable connection between the graphite rod and the conductive metal parts.

[0004] A resistor includes a graphite rod, the left and right sides of which are provided with multiple annular grooves, and two portal frames are arranged left and right. Each portal frame has a sliding column slidably connected to its front and rear ends, and an arc rod is fixed to the opposite end of the two sliding columns. The two arc rods are inserted into one of the annular grooves.

[0005] The outer end of the sliding column is fixed with a stop pin, and the outer side of each arc rod is fixed with a compression spring. The outer end of the compression spring is fixed to the corresponding portal frame.

[0006] An L-shaped frame is fixed to the outside of the portal frame, and a terminal block is fixed to the outer end of the L-shaped frame.

[0007] The graphite rod has a vertical square hole in the middle, and a square rod is inserted into the square hole. A round seat is fixed to the lower end of the square rod. A crossbar is fixed to both sides of the round seat. A boss is fixed to the lower side of the two portal frames. The two bosses are slidably connected to the two crossbars respectively. A fastening bolt is threaded onto the boss. The fastening bolt presses on the crossbar. A stop pin is fixed to the outer end of the two crossbars.

[0008] The graphite rod has a central hole on both the left and right sides. The lower ends of the two sliders are slidably connected to the two L-shaped frames, and the upper ends of the two sliders are fixed with round rods, which are inserted into the two central holes respectively.

[0009] A protrusion is fixed on the L-shaped frame, and a second compression spring is fixed on the protrusion. The other end of the second compression spring is fixed to the outside of the slide plate.

[0010] The outer end of the terminal block is provided with a wire hole, and a fastening bolt two is threadedly connected to the terminal block, with the end of the fastening bolt two inserted into the wire hole.

[0011] A threaded post is fixed to the lower side of the circular base. The middle part of the rotating plate is inserted into the threaded post. A nut is connected to the threaded post by thread. The nut presses on the lower side of the rotating plate. Hollow rods are fixed to both ends of the lower side of the rotating plate. Two solid rods are fixed on the base frame. The two solid rods are slidably connected to the two hollow rods respectively. The lower end of each hollow rod is connected to a fastening bolt three by thread. The two fastening bolts three press on the two solid rods respectively. Multiple screw holes are evenly distributed on the base frame.

[0012] It also includes an outer cover, which covers the outside of the graphite rod and avoids multiple annular grooves. A sliding sleeve is provided in the middle of the upper side of the outer cover. The sliding sleeve is inserted into the upper part of the square rod. Four fastening bolts are threadedly connected to the sliding sleeve and press the four fastening bolts on the square rod.

[0013] A resistor manufacturing process includes the following steps:

[0014] S1: Part prefabrication: Graphite rod machining: turning annular grooves, square holes and center holes; Metal parts: stamping or cutting gate brackets, L-shaped brackets, tapping terminal blocks;

[0015] S2: Assembling conductive components: The arc rod and the portal frame are connected by a sliding column and a spring, and inserted into the annular groove of the graphite rod; the slider is fixed to the round rod, inserted into the center hole of the graphite rod, and connected to the spring and the L-shaped frame;

[0016] S3: Support structure installation: The square rod is inserted into the square hole of the graphite rod, and the lower end is connected to the round seat and the crossbar; the portal frame slides on the crossbar and is fixed with bolts;

[0017] S4: Base and outer cover assembly: Install the rotating plate, hollow rod and base frame under the round base, and lock them after adjusting the height; the outer cover is put on the graphite rod and fixed on the square rod. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 A schematic diagram of the structure of a resistor. Figure 1 ;

[0020] Figure 2 A schematic diagram of the structure of a resistor. Figure 2 ;

[0021] Figure 3 A schematic diagram of the structure of a resistor. Figure 3 ;

[0022] Figure 4 Schematic diagram of graphite rod structure Figure 1 ;

[0023] Figure 5 Schematic diagram of graphite rod structure Figure 2 ;

[0024] Figure 6 Schematic diagram of portal frame and L-shaped frame Figure 1 ;

[0025] Figure 7 Schematic diagram of portal frame and L-shaped frame Figure 2 ;

[0026] Figure 8 Schematic diagram of the circular base Figure 1 ;

[0027] Figure 9 Schematic diagram of the circular base Figure 2 ;

[0028] Figure 10 This is a schematic diagram of the base frame structure;

[0029] Figure 11 Schematic diagram of the outer casing Figure 1 ;

[0030] Figure 12 Schematic diagram of the outer casing Figure 2 ;

[0031] In the figure: graphite rod 101; square hole 102; annular groove 103; central hole 104;

[0032] 201. Portal frame; 202. Socket; 203. Fastening bolt; 204. Arc rod; 205. Sliding column; 206. Stop pin; 207. Compression spring;

[0033] L-shaped bracket 301; protrusion 302; wire hole 303; fastening bolt 2 304; terminal block 305; compression spring 2 306; round rod 307; slider 308;

[0034] Round seat 401; Square rod 402; Stop pin 2 403; Crossbar 404; Nut 405; Threaded post 406;

[0035] Base frame 501; Fastening bolts 3 502; Solid rod 503; Hollow rod 504; Rotating piece 505;

[0036] Outer cover 601; sliding sleeve 602; fastening bolts four 603. Detailed Implementation

[0037] like Figure 4-7 As shown;

[0038] A resistor includes a graphite rod 101 with multiple annular grooves 103 on both its left and right sides. Two portal frames 201 are positioned to the left and right of each other. Each portal frame 201 has a sliding column 205 slidably connected to its front and rear ends. An arc rod 204 is fixed to the opposite end of each sliding column 205, and the two arc rods 204 are inserted into one of the annular grooves 103. The graphite rod 101 acts as a resistive element, and the multiple annular grooves 103 on its left and right sides are used to change the length of the graphite rod 101 connected to the circuit. By inserting the arc rods 204 into different annular grooves 103, the effective length of the graphite rod 101 between the two portal frames 201 can be adjusted, thereby changing the resistance value. The sliding connection between the sliding column 205 and the portal frame 201 ensures that the arc rod 204 can be stably inserted into the annular groove 103, achieving reliable contact with the graphite rod 101 and providing a path for current conduction.

[0039] like Figure 6-7 As shown;

[0040] Because a stop pin 206 is fixed to the outer end of the sliding column 205, and a compression spring 207 is fixed to the outer side of each arc rod 204, with the outer end of the compression spring 207 fixed to the corresponding portal frame 201, the stop pin 206 prevents the sliding column 205 from slipping out of the portal frame 201, ensuring structural integrity. The compression spring 207 always applies an inward elastic force to the arc rod 204, making the arc rod 204 tightly fit against the inner wall of the annular groove 103, avoiding loosening of contact due to vibration or other factors, ensuring stable electrical conductivity between the graphite rod 101 and the arc rod 204, and reducing contact resistance fluctuations.

[0041] like Figure 6-7 As shown;

[0042] Because an L-shaped frame 301 is fixed to the outside of the portal frame 201, and a terminal block 305 is fixed to the outer end of the L-shaped frame 301, the L-shaped frame 301 serves to connect the portal frame 201 and the terminal block 305, forming an intermediate path for current conduction. The terminal block 305 is used to connect external circuit wires, allowing the current conducted by the graphite rod 101 through the arc rod 204, portal frame 201, and L-shaped frame 301 to be introduced into or led out of the circuit, thus realizing the electrical connection between the resistor and the external circuit.

[0043] like Figure 4-9 As shown;

[0044] Because the graphite rod 101 has a vertical square hole 102 in the middle, the square rod 402 is inserted into the square hole 102. The lower end of the square rod 402 is fixed with a round seat 401. The left and right sides of the round seat 401 are both fixed with crossbars 404. The lower sides of the two portal frames 201 are both fixed with protrusions 202. The two protrusions 202 are slidably connected to the two crossbars 404 respectively. The protrusions 202 are connected with fastening bolts 203 by threads. The fastening bolts 203 press on the crossbars 404. The outer ends of the two crossbars 404 are both fixed with stop pins 403. The square rod 402 is inserted into the square hole 102 of the graphite rod 101 to achieve vertical positioning of the graphite rod 101 and prevent it from rotating. The round base 401 provides sliding support for the portal frame 201 via the crossbar 404. The protrusion 202 slides on the crossbar 404, which can drive the portal frame 201 and the arc rod 204 to move left and right, making it easy to select different annular grooves 103 to adjust the resistance. After tightening the first fastening bolt 203, the position of the protrusion 202 can be fixed, so that the arc rod 204 is stably in the selected annular groove 103; the second stop pin 403 prevents the protrusion 202 from slipping off the end of the crossbar 404.

[0045] like Figure 4-7 As shown;

[0046] Since the graphite rod 101 has a central hole 104 on both its left and right sides, the lower ends of the two sliders 308 are slidably connected to the two L-shaped frames 301, and the upper ends of the two sliders 308 are fixed with round rods 307, which are inserted into the two central holes 104 respectively. The round rods 307 are inserted into the central holes 104 of the graphite rod 101 and cooperate with the arc rod 204 to contact the graphite rod 101 from different positions, further enhancing the connection stability between the graphite rod 101 and the conductive component. The sliders 308 slide on the L-shaped frames 301, which can adapt to the left and right movement of the portal frame 201, ensuring that the round rods 307 always maintain cooperation with the central holes 104, helping to maintain the positional stability of the graphite rod 101 and reducing its deformation under stress.

[0047] like Figure 6-7 As shown;

[0048] Since a protrusion 302 is fixed on the L-shaped frame 301, and a compression spring 306 is fixed on the protrusion 302, with the other end of the compression spring 306 fixed to the outside of the slider 308; the compression spring 306 applies an inward elastic force to the slider 308, causing the round rod 307 to be tightly inserted into the center hole 104, preventing gaps between the round rod 307 and the center hole 104, and at the same time providing elastic buffer for the slider 308 when the portal frame 201 moves, ensuring that the round rod 307 adjusts its position synchronously with the portal frame 201 and maintains stable contact.

[0049] like Figure 6-7 As shown;

[0050] Since the outer end of the terminal 305 is provided with a wire hole 303, and a fastening bolt 304 is threadedly connected to the terminal 305, the end of the fastening bolt 304 is inserted into the wire hole 303; the wire hole 303 is used to insert an external wire, and after the fastening bolt 304 is tightened, the wire can be pressed into the wire hole 303, so as to realize a reliable connection between the wire and the terminal 305, avoid poor contact caused by loose wire, and ensure the stability of the current conduction path.

[0051] like Figure 8-10 As shown;

[0052] A threaded post 406 is fixed to the lower side of the circular base 401. The middle part of the rotating plate 505 is inserted into the threaded post 406. A nut 405 is threadedly connected to the threaded post 406, pressing against the lower side of the rotating plate 505. Hollow rods 504 are fixed to both ends of the lower side of the rotating plate 505. Two solid rods 503 are fixed on the base frame 501, and the two solid rods 503 are slidably connected to the two hollow rods 504 respectively. The lower end of each hollow rod 504 is threadedly connected to a fastening bolt 502, which presses against the two solid rods 503 respectively. Multiple screw holes are evenly distributed on the base frame 501. The threaded post 406 and the nut 405 cooperate to fix the angle of the rotating plate 505, realizing the overall rotation adjustment of the resistor. The sliding cooperation between the hollow rod 504 and the solid rod 503 can adjust the height of the resistor, and the fastening bolts 502 are used to lock the height position. The base frame 501 is fixed to the mounting surface by screw holes, providing stable support for the entire resistor and ensuring its position is fixed during operation.

[0053] like Figure 11-12 As shown;

[0054] Since the resistor also includes an outer cover 601, which covers the outside of the graphite rod 101 and avoids multiple annular grooves 103, a sliding sleeve 602 is provided in the upper middle part of the outer cover 601. The sliding sleeve 602 is inserted into the upper part of the square rod 402, and a fastening bolt 603 is threadedly connected to the sliding sleeve 602, pressing the fastening bolt 603 onto the square rod 402. The outer cover 601 can prevent dust, impurities, etc. from entering the surface of the graphite rod 101, protecting the graphite rod 101 from external environmental corrosion, and preventing accidental contact by personnel. The sliding sleeve 602 cooperates with the square rod 402 to position the outer cover 601, and the fastening bolt 603 can fix the position of the outer cover 601. Since the outer cover 601 avoids the annular grooves 103, it does not affect the selection and contact of the arc rod 204 with the annular grooves 103, ensuring that the resistance adjustment function is realized normally.

[0055] A resistor manufacturing process includes the following steps:

[0056] S1: Part prefabrication: Graphite rod machining: turning annular grooves, square holes and center holes; Metal parts: stamping or cutting gate brackets, L-shaped brackets, tapping terminal blocks;

[0057] S2: Assembling conductive components: The arc rod and the portal frame are connected by a sliding column and a spring, and inserted into the annular groove of the graphite rod; the slider is fixed to the round rod, inserted into the center hole of the graphite rod, and connected to the spring and the L-shaped frame;

[0058] S3: Support structure installation: The square rod is inserted into the square hole of the graphite rod, and the lower end is connected to the round seat and the crossbar; the portal frame slides on the crossbar and is fixed with bolts;

[0059] S4: Base and outer cover assembly: Install the rotating plate, hollow rod and base frame under the round base, and lock them after adjusting the height; the outer cover is put on the graphite rod and fixed on the square rod.

Claims

1. A resistor comprising a graphite rod (101), characterized in that: The graphite rod (101) has multiple annular grooves (103) on its left and right sides, and two portal frames (201) are arranged on the left and right sides. Each portal frame (201) has a sliding column (205) slidably connected to its front and rear ends. The opposite ends of the two sliding columns (205) are fixed with arc rods (204), and the two arc rods (204) are inserted into one of the annular grooves (103). The outer end of the sliding column (205) is fixed with a stop pin (206), and the outer side of each arc rod (204) is fixed with a compression spring (207), the outer end of the compression spring (207) is fixed to the corresponding portal frame (201). An L-shaped frame (301) is fixed to the outside of the gantry frame (201), and a terminal block (305) is fixed to the outer end of the L-shaped frame (301). The graphite rod (101) has a vertical square hole (102) in the middle. The square rod (402) is inserted into the square hole (102). The lower end of the square rod (402) is fixed with a round seat (401). The left and right sides of the round seat (401) are fixed with crossbars (404). The lower sides of the two portal frames (201) are fixed with protrusions (202). The two protrusions (202) are slidably connected to the two crossbars (404). The protrusions (202) are connected with fastening bolts (203) by threads. The fastening bolts (203) press on the crossbars (404). The outer ends of the two crossbars (404) are fixed with stop pins (403). The graphite rod (101) has a central hole (104) on both the left and right sides. The lower ends of the two sliders (308) are slidably connected to the two L-shaped frames (301). The upper ends of the two sliders (308) are fixed with round rods (307), and the two round rods (307) are inserted into the two central holes (104). The resistor manufacturing process. Includes the following steps: S1: Part prefabrication: Graphite rod machining: turning annular grooves, square holes and center holes; Metal parts: stamping or cutting of door-shaped brackets and L-shaped brackets; tapping of terminal blocks; S2: Assembling conductive components: The arc rod and the portal frame are connected by a sliding column and a spring, and inserted into the annular groove of the graphite rod; the slider is fixed to the round rod, inserted into the center hole of the graphite rod, and connected to the spring and the L-shaped frame; S3: Support structure installation: The square rod is inserted into the square hole of the graphite rod, and the lower end is connected to the round seat and the crossbar; the portal frame slides on the crossbar and is fixed with bolts; S4: Base and outer cover assembly: Install the rotating plate, hollow rod and base frame under the round base, and lock them after adjusting the height; the outer cover is put on the graphite rod and fixed on the square rod.

2. A resistor according to claim 1, characterized in that: A protrusion (302) is fixed on the L-shaped frame (301), and a compression spring (306) is fixed on the protrusion (302). The other end of the compression spring (306) is fixed on the outside of the slider (308).

3. A resistor according to claim 2, characterized in that: The outer end of the terminal block (305) is provided with a wire hole (303), and a fastening bolt (304) is threadedly connected to the terminal block (305). The end of the fastening bolt (304) is inserted into the wire hole (303).

4. A resistor according to claim 3, characterized in that: A threaded post (406) is fixed on the lower side of the round base (401). The middle part of the rotating plate (505) is inserted into the threaded post (406). A nut (405) is connected to the threaded post (406) by thread. The nut (405) presses on the lower side of the rotating plate (505). Hollow rods (504) are fixed at both ends of the lower side of the rotating plate (505). Two solid rods (503) are fixed on the base frame (501). The two solid rods (503) are slidably connected to the two hollow rods (504). The lower end of each hollow rod (504) is connected to a fastening bolt (502) by thread. The two fastening bolts (502) press on the two solid rods (503). Multiple screw holes are evenly distributed on the base frame (501).

5. A resistor according to claim 4, characterized in that: It also includes an outer cover (601), which covers the outside of the graphite rod (101) and avoids multiple annular grooves (103). A sliding sleeve (602) is provided in the middle of the upper side of the outer cover (601). The sliding sleeve (602) is inserted into the upper part of the square rod (402). A fastening bolt four (603) is threadedly connected to the sliding sleeve (602), and the fastening bolt four (603) presses on the square rod (402).

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