A direct current power supply current protection device

Abstract

This utility model relates to the technical field of current protectors, and in particular to a DC power supply current protection device, including a housing with a door installed on the wider side of the housing. In this DC power supply current protection device, a drive motor rotates a cylindrical block. When the cylindrical block rotates, a spiral groove pushes a pressing column, causing a sliding plate to move downwards on a guide rod. This causes a connecting rod and a cleaning brush to move downwards to clean the first filter screen. When the cylindrical block continues to rotate a certain angle, the pushing effect of the spiral groove on the pressing column disappears, and the return spring returns to its original deformation, pushing the sliding plate upwards to reset. This process repeats, achieving reciprocating cleaning of the first filter screen by the cleaning brush. After being pressed by a trapezoidal block, an inclined block drives a limiting rod to overcome the spring force of the compression spring and move towards the mounting groove. The limiting rod embeds into a limiting hole on the limiting block, thus firmly installing the protector body on the mounting base, facilitating maintenance, disassembly, and assembly, and improving practicality.

Description

Technical Field

[0001] This utility model relates to the technical field of current protectors, and in particular to a DC power supply current protection device. Background Technology

[0002] A current protector is an important electrical device used to ensure the safe operation of a circuit. It plays a key role in the power system. Its main function is to quickly and reliably disconnect the circuit when abnormal current conditions such as overload, short circuit or leakage occur in the circuit, so as to prevent serious consequences such as equipment damage, electrical fire or even personal injury caused by abnormal current.

[0003] A power supply voltage and current protection device, disclosed on the Chinese Patent Network (publication number CN214850952U), includes a base, a protector body, and a fixing mechanism. The fixing plate is snapped into the housing, the clip is fixed to the protector housing, the conductive head is fixed to the protector housing, a limiting hole is formed in the fixing block, an inlet hole is formed in the fixing block, and a power connection hole is formed in the fixing block, communicating with the power connection hole. A first cavity is formed in the fixing block, one end of a first elastic element is fixed to the closed end of the first cavity, and the other end of the first elastic element is fixed to the arc-shaped limiting body. Clamping elements are disposed at the top and bottom ends of the fixing block. This design of the device is reasonable and easy to operate. It not only protects the voltage and current of the power supply but also saves time and effort in disassembling and assembling the power supply, and facilitates recycling and reuse.

[0004] The following problems also exist in this solution: The protector body is installed inside the housing. During long-term use, it will generate heat. If the heat dissipation is only carried out by the device itself, the heat dissipation effect is poor. Moreover, the internal temperature will be higher when the protector body is installed inside the housing in a closed state, which will easily cause the current protector to be damaged, thereby affecting the subsequent protection of DC power supply. Therefore, there are certain drawbacks.

[0005] Therefore, in order to solve the above problems, this utility model provides a DC power supply current protection device. Utility Model Content

[0006] The purpose of this invention is to provide a DC power supply current protection device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a DC power supply current protection device, comprising a housing, a door installed on the wider side of the housing, a first filter screen embedded on the narrower side of the housing, a second filter screen embedded on the side of the housing away from the first filter screen, an intake fan installed on the inner side wall of the housing and on the first filter screen, an exhaust fan installed on the outside of the housing and on the second filter screen, a support frame installed at the bottom of the inner side of the housing, a mounting seat provided on the outer side of the support frame, a protector body installed on the mounting seat, a support plate installed on the outside of the housing and above the first filter screen, guide rods symmetrically installed on both sides of the bottom end of the support plate, a sliding plate installed on the outer ring surface of the guide rods, a connecting rod installed at the bottom of the sliding plate, and a cleaning brush installed at the bottom of the connecting rod.

[0008] Preferably, limit blocks are symmetrically installed at both ends of the bottom of the protector body, and mounting grooves are symmetrically opened at both ends of the outer side of the mounting base, and the outer side dimensions of the limit blocks are adapted to the inner side wall dimensions of the mounting grooves.

[0009] Preferably, the mounting base has a mounting cavity inside and between the two mounting slots. A threaded rod is installed between the wider side walls of the mounting cavity. A trapezoidal block is installed on the outer ring surface of the threaded rod. The bottom of the trapezoidal block fits into the inner bottom of the mounting cavity. A throttle is installed outside the mounting base, and its shaft extends into the mounting cavity and connects to one end of the threaded rod.

[0010] Preferably, compression springs are installed on both narrower side walls inside the mounting cavity. A limit rod is provided inside the compression spring. One end of the limit rod is fitted with a wedge, and the bottom of the wedge is in contact with the bottom of the inner side of the mounting cavity. The end of the limit rod away from the wedge extends into the interior of the mounting groove.

[0011] Preferably, a limiting hole is provided on the outer side of the limiting block, the outer ring size of the limiting rod is adapted to the inner sidewall size of the limiting hole, and the limiting rod is simultaneously connected to the inside of the limiting hole when it extends into the mounting groove.

[0012] Preferably, a drive motor is installed at the bottom end of the support plate away from the two limiting rods, a cylindrical block is installed on the bottom output shaft of the drive motor, a spiral groove is formed on the outer ring surface of the cylindrical block, an extrusion column is installed on the outer side of the slide plate and inside the spiral groove, and a return spring is installed on the top of the slide plate and between the top of the slide plate and the bottom of the support plate.

[0013] In summary, this utility model has the following beneficial technical effects:

[0014] This DC power supply current protection device uses a drive motor to rotate a cylindrical block. As the block rotates, a spiral groove pushes a pressing column, causing a sliding plate to move downwards on a guide rod. This movement drives a connecting rod and a cleaning brush downwards to clean the first filter screen. After the cylindrical block rotates a certain angle, the pushing action of the spiral groove on the pressing column disappears, and the return spring recovers its deformation, pushing the sliding plate upwards to reset. This process repeats, allowing the cleaning brush to clean the first filter screen repeatedly. When squeezed by a trapezoidal block, an inclined block drives a limiting rod to overcome the spring force of the compression spring and move towards the mounting groove. The limiting rod then embeds into a limiting hole on the limiting block. The interaction between the limiting rod and the limiting hole further restricts the movement of the protector body in the direction perpendicular to the mounting surface, thus firmly mounting the protector body on the mounting base. This facilitates maintenance, disassembly, and installation, resulting in improved practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a utility model Figure 1 Partial structural diagram;

[0017] Figure 3 This is a utility model Figure 2 Partial structural layering diagram;

[0018] Figure 4 This is a utility model Figure 3 Partial internal structural diagram;

[0019] Figure 5 This is a utility model Figure 1 Partial structural diagram.

[0020] Explanation of reference numerals in the attached drawings: 1. Box body; 2. Box door; 3. First filter screen; 4. Second filter screen; 5. Suction fan; 6. Exhaust fan; 7. Support frame; 8. Mounting base; 801. Mounting cavity; 802. Mounting groove; 9. Protector body; 10. Support plate; 11. Guide rod; 12. Slide plate; 13. Connecting rod; 14. Cleaning brush; 15. Limiting block; 1501. Limiting hole; 16. Threaded rod; 17. Rotary handle; 18. Trapezoidal block; 19. Compression spring; 20. Limiting rod; 21. Inclined block; 22. Drive motor; 23. Cylindrical block; 2301. Spiral groove; 24. Extrusion column; 25. Return spring. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 - Figure 5 The present invention will be described in further detail below.

[0022] A DC power supply current protection device, as per reference Figure 1 - Figure 5 The device includes a housing 1, a door 2 installed on the wider side of the housing 1, a first filter 3 embedded on the narrower side of the housing 1, a second filter 4 embedded on the side of the housing 1 away from the first filter 3, an intake fan 5 installed on the inner side wall of the housing 1 and on the first filter 3, an exhaust fan 6 installed on the outside of the housing 1 and on the second filter 4, a support frame 7 installed on the inner bottom of the housing 1, a mounting base 8 provided on the outer side of the support frame 7, a protector body 9 installed on the mounting base 8, a support plate 10 installed on the outside of the housing 1 and above the first filter 3, guide rods 11 symmetrically installed on both sides of the bottom end of the support plate 10, a sliding plate 12 installed on the outer ring surface of the guide rods 11, a connecting rod 13 installed at the bottom of the sliding plate 12, and a cleaning brush 14 installed at the bottom of the connecting rod 13.

[0023] Reference Figure 2 - Figure 3 Limiting blocks 15 are symmetrically installed at both ends of the bottom of the protector body 9. Mounting grooves 802 are symmetrically opened at both ends of the outer side of the mounting base 8. The outer side dimension of the limiting block 15 is adapted to the inner side wall dimension of the mounting groove 802. When installing the protector body 9, the limiting block 15 at the bottom of the protector body 9 is aligned with the mounting groove 802 on the mounting base 8, so that the limiting block 15 is embedded in the mounting groove 802. Through the cooperation between the limiting block 15 and the mounting groove 802, the movement of the protector body 9 in the horizontal direction is initially restricted, and the protector body 9 is initially positioned on the mounting base 8.

[0024] Reference Figure 2 - Figure 4 An installation cavity 801 is formed inside the mounting base 8 and located between two mounting slots 802. A threaded rod 16 is installed between the wider side walls of the installation cavity 801. A trapezoidal block 18 is installed on the outer ring surface of the threaded rod 16, and the bottom of the trapezoidal block 18 fits against the inner bottom of the installation cavity 801. A throttle 17 is installed on the outside of the mounting base 8, and its shaft extends into the installation cavity 801 and connects to one end of the threaded rod 16. By rotating the throttle 17, the threaded rod 16 is rotated in the installation cavity 801. When the threaded rod 16 rotates, the trapezoidal block 18 moves along the axial direction of the threaded rod 16 in the installation cavity 801. The mounting cavity 801 has compression springs 19 installed on its narrow side walls. The compression springs 19 have limit rods 20 installed inside them. One end of the limit rod 20 is fitted with a wedge 21, and the bottom of the wedge 21 fits against the bottom of the inner side of the mounting cavity 801. The end of the limit rod 20 away from the wedge 21 extends into the mounting groove 802. When the trapezoidal block 18 moves in the mounting cavity 801, it will squeeze the wedge 21. Due to the inclined surface design of the wedge 21, after being squeezed by the trapezoidal block 18, the wedge 21 will drive the limit rod 20 to overcome the elastic force of the compression springs 19 and move towards the mounting groove 802.

[0025] Reference Figure 3 - Figure 4 A limiting hole 1501 is provided on the outer side of the limiting block 15. The outer ring size of the limiting rod 20 is adapted to the inner side wall size of the limiting hole 1501. When the limiting rod 20 extends into the interior of the mounting groove 802, it is simultaneously connected to the interior of the limiting hole 1501. When the limiting rod 20 moves towards the mounting groove 802 under the drive of the inclined block 21, the limiting rod 20 will be embedded in the limiting hole 1501 on the limiting block 15. Through the cooperation between the limiting rod 20 and the limiting hole 1501, the movement of the protector body 9 in the direction perpendicular to the mounting surface is further restricted, thereby firmly installing the protector body 9 on the mounting base 8.

[0026] Reference Figure 1 - Figure 5 A drive motor 22 is installed at the bottom of the support plate 10, away from the two limit rods 20. A cylindrical block 23 is installed on the bottom output shaft of the drive motor 22. A spiral groove 2301 is formed on the outer ring surface of the cylindrical block 23. An extrusion column 24 is installed on the outer side of the slide plate 12 and inside the spiral groove 2301. A return spring 25 is installed between the top of the slide plate 12 and the bottom of the support plate 10. When the drive motor 22 works, it drives the cylindrical block 23 to rotate. Because the extrusion column 24 is embedded in the cylindrical block... When the cylindrical block 23 rotates, the spiral groove 2301 on the cylindrical block 23 pushes the extrusion column 24, causing the slide plate 12 to move downward on the guide rod 11, which in turn drives the connecting rod 13 and the cleaning brush 14 to move downward to clean the first filter screen 3. When the cylindrical block 23 continues to rotate at a certain angle, the pushing effect of the spiral groove 2301 on the extrusion column 24 disappears and the return spring 25 returns to its original deformation, pushing the slide plate 12 upward to reset. This process is repeated to achieve the reciprocating cleaning of the first filter screen 3 by the cleaning brush 14.

[0027] The implementation principle of the DC power supply current protection device of this utility model embodiment is as follows: When the device is in use, the suction fan 5 operates to draw external air into the housing 1 through the first filter 3, and the exhaust fan 6 operates to exhaust the air inside the housing 1 through the second filter 4, forming air circulation to dissipate heat from the protector body 9. After long-term use, dust will stick to the first filter 3 outside the suction fan 5. The drive motor 22 operates to drive the cylindrical block 23 to rotate. Since the extrusion column 24 is embedded in the spiral groove 2301 on the cylindrical block 23, when the cylindrical block 23 rotates, the spiral groove 2301 will push the extrusion column to rotate. The column 24 causes the slide plate 12 to move downward on the guide rod 11, which in turn moves the connecting rod 13 and the cleaning brush 14 downward to clean the first filter screen 3. When the cylindrical block 23 continues to rotate a certain angle, the pushing effect of the spiral groove 2301 on the squeezing column 24 disappears and the return spring 25 returns to its original deformation, pushing the slide plate 12 upward to reset. This process is repeated to achieve the reciprocating cleaning of the first filter screen 3 by the cleaning brush 14. When installing the protector body 9, the limiting block 15 at the bottom of the protector body 9 is aligned with the mounting groove 802 on the mounting base 8, so that the limiting block 15 is embedded in the mounting groove 802. 5. The cooperation with the mounting groove 802 initially restricts the horizontal movement of the protector body 9, achieving initial positioning of the protector body 9 on the mounting base 8. By rotating the handle 17, the threaded rod 16 is driven to rotate within the mounting cavity 801. When the threaded rod 16 rotates, the trapezoidal block 18 moves axially along the threaded rod 16 within the mounting cavity 801. When the trapezoidal block 18 moves within the mounting cavity 801, it will press against the inclined block 21. Due to the inclined surface design of the inclined block 21, after being pressed by the trapezoidal block 18, the inclined block 21 will drive the limiting rod 20 to overcome the elastic force of the compression spring 19 and move towards the mounting groove 802. When the limiting rod 20 moves towards the mounting groove 802 under the drive of the inclined block 21, the limiting rod 20 will be embedded in the limiting hole 1501 on the limiting block 15. Through the cooperation between the limiting rod 20 and the limiting hole 1501, the movement of the protector body 9 in the direction perpendicular to the mounting surface is further restricted, thereby firmly installing the protector body 9 on the mounting base 8, which is convenient for maintenance, easy to disassemble and assemble, and more practical. The external helix opening angle of the threaded rod 16 is 20 degrees, and the thread self-locking condition meets the following formula calculation: self-locking condition = friction coefficient * tan (helix angle) ≥ 1.

[0028] Finally, the following points should be noted: First, in the description of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly, and can be mechanical connection or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0029] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0031] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A DC power supply current protection device, comprising a housing (1), characterized in that: A door (2) is installed on the wider side of the outer casing (1). A first filter (3) is embedded on the narrower side of the outer casing (1). A second filter (4) is embedded on the side of the outer casing (1) away from the first filter (3). An intake fan (5) is installed on one side wall of the inner casing (1) and on the first filter (3). An exhaust fan (6) is installed on the outer side of the casing (1) and on the second filter (4). A support frame (7) is installed on the bottom inner side of the casing (1). A mounting base (8) is provided on the outer side of the support frame (7), and a protector body (9) is installed on the mounting base (8). A support plate (10) is installed on the outside of the housing (1) and above the first filter screen (3). Guide rods (11) are symmetrically installed on both sides of the bottom end of the support plate (10). A sliding plate (12) is installed on the outer ring surface of the guide rods (11). A connecting rod (13) is installed at the bottom of the sliding plate (12). A cleaning brush (14) is installed at the bottom of the connecting rod (13).

2. The DC power supply current protection device according to claim 1, characterized in that: Limiting blocks (15) are symmetrically installed at both ends of the bottom of the protector body (9), and mounting grooves (802) are symmetrically opened at both ends of the outer side of the mounting base (8). The outer side dimensions of the limiting blocks (15) are adapted to the inner side wall dimensions of the mounting grooves (802).

3. A DC power supply current protection device according to claim 2, characterized in that: An installation cavity (801) is provided inside the mounting base (8) and located between the two mounting slots (802). A threaded rod (16) is installed between the wider side walls inside the installation cavity (801). A trapezoidal block (18) is installed on the outer ring surface of the threaded rod (16). The bottom of the trapezoidal block (18) fits against the inner bottom of the installation cavity (801). A throttle (17) is installed on the outside of the mounting base (8) and its shaft extends into the interior of the installation cavity (801) and connects to one end of the threaded rod (16).

4. A DC power supply current protection device according to claim 3, characterized in that: Compression springs (19) are installed on the narrow side walls inside the mounting cavity (801). A limit rod (20) is provided inside the compression spring (19). A wedge (21) is installed at one end of the limit rod (20), and the bottom of the wedge (21) is in contact with the bottom of the inner side of the mounting cavity (801). The end of the limit rod (20) away from the wedge (21) extends into the interior of the mounting groove (802).

5. A DC power supply current protection device according to claim 4, characterized in that: The limiting block (15) has a limiting hole (1501) on its outer side surface. The outer ring size of the limiting rod (20) is adapted to the inner side wall size of the limiting hole (1501). When the limiting rod (20) extends into the interior of the mounting groove (802), it is simultaneously connected to the interior of the limiting hole (1501).

6. A DC power supply current protection device according to claim 1, characterized in that: A drive motor (22) is installed at the bottom of the support plate (10) away from the two limit rods (20). A cylindrical block (23) is installed on the bottom output shaft of the drive motor (22). A spiral groove (2301) is opened on the outer ring surface of the cylindrical block (23). An extrusion column (24) is installed on the outside of the slide plate (12) and inside the spiral groove (2301). A return spring (25) is installed on the top of the slide plate (12) and between the top and the bottom of the support plate (10).

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