PLC (Programmable Logic Controller) convenient for disassembly and assembly of expanded circuit board

Abstract

The utility model relates to the technical field of PLC controllers, and discloses a PLC controller convenient for dismounting and mounting an expanded circuit board, the PLC controller comprises a housing, a spring positioning mechanism and a heat dissipation mechanism, the housing comprises a connecting shell, and four corners of the outer wall of one side, adjacent to the connecting shell, of the housing are fixedly connected with mounting blocks; the mounting blocks are in threaded connection through fastening bolts, and the spring positioning mechanism comprises a movable block and a limiting block. When the PLC is used, the servo motor is started to drive the driving rod to rotate, the transmission gear and the rack are driven to rotate at the same time, then the driving rod and the rotating rod are driven to rotate together, the multiple heat dissipation fan blades are driven to rotate at the same time, the rotation of the heat dissipation fan blades can effectively push air to flow, forced convection is formed, and the heat dissipation efficiency is improved. The heat exchange efficiency is improved, heat is discharged in time, and the working temperature of components in the PLC can be kept within a safe range.

Description

TECHNICAL FIELD

[0001] The utility model relates to PLC controller technical field especially relates to a kind of PLC controller of circuit board dismounting of being convenient to expand. BACKGROUND

[0002] It is known that PLC (Programmable Logic Controller) is an electronic device for automation control, which realizes the control of industrial processes, mechanical equipment or production lines through programming. It can receive input signals from sensors, process these signals, and generate control outputs according to preset logic or programs, thus achieving automatic operation of devices. PLC is widely used in various industrial fields such as manufacturing, transportation, energy, etc. to improve production efficiency and system reliability. The built-in input / output (I / O) quantity of PLC controller is usually limited, and by connecting extension circuit boards internally, additional input and output channels can be added to monitor more sensors or control more actuators.

[0003] However, traditional PLC controllers are usually sealed, which leads to poor air circulation and poor heat dissipation. Especially when PLC works under high load, the heat generated by internal components will increase, and in the case of long-term operation, the gradually accumulated heat will cause high internal temperature, which may cause internal component damage. Therefore, technical improvement is urgently needed. SUMMARY

[0004] The utility model aims at solving the shortcomings in the prior art and provides a PLC controller for easy disassembly and expansion of circuit boards. When the PLC controller is in use, the servo motor drives the main rod to rotate, which in turn drives the transmission gear and rack to rotate. The main rod and rotating rod rotate together, driving multiple cooling fan blades to rotate. The rotation of the cooling fan blades effectively promotes air flow, forms forced convection, improves heat exchange efficiency, and promptly discharges heat, helping to keep the working temperature of the internal components of the PLC controller within a safe range.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A PLC controller for easy disassembly and expansion of circuit boards, comprising a housing, a spring positioning mechanism and a cooling mechanism. The housing includes a connecting shell. Four corners of the adjacent side walls of the housing and the connecting shell are fixedly connected with mounting blocks. The mounting blocks are connected by fastening bolts.

[0007] The spring positioning mechanism comprises a movable block and a limiting block, the upper end and the lower end of the inner wall of the movable block near the middle part are fixedly connected with placing blocks, one end of the placing blocks away from the center of the movable block is fixedly connected with a reset spring, one end of the reset spring away from the center of the movable block is fixedly connected with a pull rod, and the bottom surface and the top surface of the limiting block are provided with positioning grooves.

[0008] The heat dissipation mechanism comprises a storage groove, one side of the inner wall of the rear end of the storage groove is rotationally connected with a rotating rod, the other side of the inner wall of the rear end of the storage groove is fixedly connected with a servo motor, and the output end of the servo motor is fixedly connected with a driving rod.

[0009] Compared with the existing PLC controller, when the PLC controller is used, the reset spring is compressed by the action force of the pull rod on both sides, the reset spring is limited by the sliding of the limiting block in the limiting groove, the reset spring is prevented from deviating, the shell is attached to the connecting shell, the pull rod is released at this time, the reset spring releases the action force to drive the pull rod to rebound, so that the pull rod is firmly clamped in the positioning groove, and the shell and the connecting shell are limited, the fastening bolt is used for secondary limiting, the PLC controller is convenient to disassemble and install, the internal circuit board is convenient to replace or maintain, and the practicality is high.

[0010] Further, the upper part and the lower part of the outer wall of the front end of the shell are provided with a plurality of wiring terminals.

[0011] Through the above technical scheme, the wiring terminals are convenient for connecting the cables.

[0012] Further, the rear end of the upper surface of the connecting shell and the middle part of the rear end outer wall are provided with a plurality of ventilation openings, and the outer wall of the front end of the connecting shell is provided with a circuit board.

[0013] Through the above technical scheme, the ventilation openings are convenient for promoting the internal air circulation.

[0014] Further, the two sides of the outer wall of the pull rod are fixedly connected with sliding blocks, the two sides of the inner wall of the movable block are provided with sliding grooves, and the sliding blocks are slidably connected in the sliding grooves.

[0015] Through the above technical scheme, the sliding blocks are slidably connected in the sliding grooves, and the pull rod is limited.

[0016] Further, the rear end of the pull rod is clamped and matched with the inner wall of the positioning groove.

[0017] Through the above technical scheme, the rear end of the pull rod is clamped and matched with the inner wall of the positioning groove, and the movable block and the limiting block are limited.

[0018] Further, the outer wall of the rotating rod and the driving rod is sleeved with a transmission gear, and the outer wall of the transmission gear is engaged with a rack;

[0019] Through the above technical scheme, the outer wall of the transmission gear is engaged with the rack, so that the rotating rod and the driving rod rotate together.

[0020] Further, the front end of the driving rod and the rotating rod is fixedly connected with a plurality of heat dissipation fan blades;

[0021] Through the above technical scheme, the heat dissipation fan blades facilitate the acceleration of the internal air circulation to heat dissipate the circuit board.

[0022] The utility model has the following beneficial effects:

[0023] 1. The utility model discloses a PLC controller convenient for expanding circuit board disassembly, compared with the existing PLC controller, when the PLC controller is used, the driving rod is driven to rotate through the starting servo motor, and the transmission gear and the rack are driven to rotate at the same time, the driving rod and the rotating rod are driven to rotate at the same time, and a plurality of heat dissipation fan blades are driven to rotate, the rotation of the heat dissipation fan blades can effectively promote air flow, form forced convection, improve heat exchange efficiency, discharge heat in time, and help to keep the working temperature of the internal components of the PLC controller within a safe range.

[0024] 2. The utility model discloses a PLC controller convenient for expanding circuit board disassembly, compared with the existing PLC controller, when the PLC controller is used, the driving rod is driven to rotate through the starting servo motor, and the transmission gear and the rack are driven to rotate at the same time, the driving rod and the rotating rod are driven to rotate at the same time, and a plurality of heat dissipation fan blades are driven to rotate, the rotation of the heat dissipation fan blades can effectively promote air flow, form forced convection, improve heat exchange efficiency, discharge heat in time, and help to keep the working temperature of the internal components of the PLC controller within a safe range.

[0025] The reset spring is limited, offset of the reset spring is prevented, the shell and the connecting shell are attached, the pull rod is loosened at this time, the reset spring releases the acting force and drives the pull rod to rebound, so that the pull rod is clamped in the positioning groove firmly, and then the shell and the connecting shell are limited, the fastening bolt is convenient for secondary limiting, the PLC controller is convenient for dismounting and installing, so that the internal circuit board is replaced or repaired, and the practicality is high. ACCURACY

[0026] Fig. 1 is an axonometric view of the utility model discloses a kind of PLC controller convenient for expanding circuit board disassembly;

[0027] Fig. 2 is the explosion schematic view of the utility model discloses a kind of PLC controller convenient for expanding circuit board disassembly;

[0028] Figure 3 is a partial sectional view of the movable block and the limiting block of the PLC controller convenient for expanding circuit board disassembly provided by the utility model;

[0029] Figure 4 is Figure 3 An enlarged view of the A part in Figure 3;

[0030] Figure 5 is an exploded schematic view of the storage slot of the PLC controller convenient for expanding circuit board disassembly provided by the utility model;

[0031] Figure 6 is Figure 5 An enlarged view of the B part in Figure 5.

[0032] Legend:

[0033] 1, shell; 101, connecting shell; 102, mounting block; 103, fastening bolt; 104, terminal; 105, vent; 106, circuit board;

[0034] 2, spring positioning mechanism; 201, movable block; 202, limiting block; 203, positioning groove; 204, limiting block; 205, return spring; 206, pull rod; 207, sliding block; 208, sliding slot;

[0035] 3, heat dissipation mechanism; 301, storage slot; 302, rotating rod; 303, servo motor; 304, driving rod; 305, heat dissipation fan blade; 306, transmission gear; 307, rack. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0037] With reference to Figures 1, 2 and 5, one embodiment provided by the utility model is: a PLC controller convenient for expanding circuit board disassembly, comprising a shell 1, a spring positioning mechanism 2 and a heat dissipation mechanism 3, the shell 1 comprises a connecting shell 101, four corners of the adjacent side walls of the shell 1 and the connecting shell 101 are fixedly connected with mounting blocks 102, and the mounting blocks 102 are screw-connected by fastening bolts 103;

[0038] The spring positioning mechanism 2 comprises a movable block 201 and a limiting block 202, the inner wall of the movable block 201 is fixedly connected with a placing block 204 at the upper end and the lower end close to the middle part, one end of the placing block 204 away from the center of the movable block 201 is fixedly connected with a reset spring 205, one end of the reset spring 205 away from the center of the movable block 201 is fixedly connected with a pull rod 206, and the bottom surface and the top surface of the limiting block 202 are both provided with a positioning groove 203.

[0039] The heat dissipation mechanism 3 comprises a storage groove 301, one side of the rear end inner wall of the storage groove 301 is rotationally connected with a rotating rod 302, the other side of the rear end inner wall of the storage groove 301 is fixedly connected with a servo motor 303, and the output end of the servo motor 303 is fixedly connected with a driving rod 304.

[0040] Compared with the existing PLC controller, when the PLC controller is used, the reset spring is compressed by giving an acting force through pressing the pull rod on both sides, the reset spring is limited by the sliding of the limiting block in the limiting groove, so as to prevent the reset spring from deviating, the shell is attached to the connecting shell, the pull rod is released at this time, the reset spring releases the acting force to drive the pull rod to rebound, so that the pull rod is firmly clamped in the positioning groove, thereby limiting the shell and the connecting shell, the fastening bolt is used for secondary limiting, the PLC controller is convenient to disassemble and install, so that the internal circuit board is replaced or repaired, and the utility

[0041] The performance is higher.

[0042] Referring to FIG. 2, FIG. 4 and Figure 6The upper portion and the lower portion of the front end outer wall of the shell 1 are provided with a plurality of terminal blocks 104, and the terminal blocks 104 are convenient for connecting cables; the rear end of the upper surface of the connecting shell 101 and the middle portion of the rear end outer wall are provided with a plurality of air vents 105; the outer wall of the front end of the connecting shell 101 is provided with a circuit board 106; the air vents 105 are convenient for promoting internal air circulation; the outer walls of the two sides of the pull rod 206 are fixedly connected with sliding blocks 207; the inner walls of the two sides of the movable block 201 are provided with sliding grooves 208; the sliding blocks 207 are slidably connected in the sliding grooves 208; the sliding blocks 207 are slidably connected in the sliding grooves 208, which is convenient for limiting the pull rod; the rear ends of the pull rods 206 are clamped and matched with the inner walls of the positioning grooves 203, which is convenient for limiting the movable block 201 and the limiting block 202; the outer walls of the rotating rod 302 and the driving rod 304 are sleeved with transmission gears 306; the outer walls of the transmission gears 306 are engaged with racks 307, which is convenient for rotating the rotating rod 302 and the driving rod 304 together; the front ends of the driving rod 304 and the rotating rod 302 are fixedly connected with a plurality of heat dissipation fan blades 305, which is convenient for accelerating internal air circulation to heat dissipation the circuit board.

[0043] Working principle: when in use, first, press the two pull rods 206 in the movable block 201 of the spring positioning mechanism 2, so that the pull rods 206 compress the connected return springs 205, the sliding blocks 207 slide along the sliding grooves 208 in the inner walls of the movable blocks 201, the pull rods 206 are limited, then the shell 1 is attached to the connecting shell 101, the pull rods 206 are loosened, the return springs 205 release the driving force to make the pull rods 206 rebound, so that the rear ends of the pull rods 206 are clamped into the positioning grooves 203 of the limiting blocks 202, the preliminary limiting of the shell 1 and the connecting shell 101 is realized, then the fastening bolts 103 on the corner mounting blocks 102 of the two are fixed again, which is convenient for subsequent disassembly of the shell 1 to replace or repair the circuit board 106 at the front end of the connecting shell 101; at the same time, the terminal blocks 104 on the upper and lower portions of the front end of the shell 1 can conveniently connect cables; after the servo motor 303 in the heat dissipation mechanism 3 is started, the output end drives the driving rod 304 to rotate, the transmission gear 306 on the outer wall of the driving rod 304 drives the rotating rod 302 to rotate, and the heat dissipation fan blades 305 on the front ends of the driving rod 304 and the rotating rod 302 rotate to accelerate internal air circulation and heat dissipation of the circuit board 106.

[0044] The transmission gear 306 is engaged with the rack 307 to drive the rotating rod 302 to rotate synchronously, the driving rod 304 and the multiple heat dissipation fan blades 305 at the front end of the rotating rod 302 rotate, the multiple air vents 105 on the upper surface of the connecting shell 101 and the rear end outer wall cooperate to accelerate the air circulation in the controller, thereby dissipating heat for the circuit board 106.

[0045] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A PLC controller facilitating disassembly of an expansion circuit board, comprising a shell (1), a spring positioning mechanism (2) and a heat dissipation mechanism (3), characterized in that: The shell (1) includes a connecting shell (101), and mounting blocks (102) are fixedly connected to four corners of the outer wall of the side adjacent to the connecting shell (101). The spring positioning mechanism (2) includes movable blocks (201) and limiting blocks (202), the inner wall of the movable block (201) is fixedly connected with placing blocks (204) at the upper end and the lower end close to the middle part, the end away from the center of the placing block (204) is fixedly connected with return springs (205), the end away from the center of the return spring (205) is fixedly connected with pull rods (206), and the bottom surface and the top surface of the limiting block (202) are provided with positioning grooves (203). The heat dissipation mechanism (3) includes a storage groove (301), the inner wall of the rear end of the storage groove (301) is rotatably connected with a rotating rod (302), the other side of the rear end of the inner wall of the storage groove (301) is fixedly connected with a servo motor (303), and the output end of the servo motor (303) is fixedly connected with a driving rod (304).

2. The PLC controller of claim 1, wherein: The upper part and the lower part of the front end outer wall of the shell (1) are provided with a plurality of wiring terminals (104).

3. The PLC controller of claim 1, wherein: The rear end of the upper surface of the connecting shell (101) and the middle part of the rear end outer wall are provided with a plurality of ventilation holes (105), and the outer wall of the front end of the connecting shell (101) is provided with a circuit board (106).

4. The PLC controller of claim 1, wherein: The outer wall of the pull rod (206) is fixedly connected with a sliding block (207) on both sides, and the inner wall of the movable block (201) is provided with a sliding groove (208) on both sides.

5. The PLC controller of claim 1, wherein: The rear end of the pull rod (206) is clamped and matched with the inner wall of the positioning groove (203).

6. The PLC controller of claim 1, wherein: The outer wall of the rotating rod (302) and the driving rod (304) is sleeved with a transmission gear (306), and the outer wall of the transmission gear (306) is engaged with a rack (307).

7. The PLC controller of claim 1, wherein: The front end of the driving rod (304) and the rotating rod (302) is fixedly connected with a plurality of heat dissipation fan blades (305).

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