A power switch for a retarder

Abstract

This application relates to a retarder power master switch, comprising a housing and a bracket. The housing is hollow, forming a receiving cavity. Two stationary contacts are disposed on the bottom wall of the receiving cavity, extending out of the housing as a first contact and a second contact. The housing is fixedly connected to the bracket, which has a fixing block. A fuse and a protective shell are mounted on the fixing block, and multiple spare fuses are disposed on the protective shell. A third contact and a fourth contact are disposed on the fixing block, with both ends of the fuse fixedly connected to the third and fourth contacts. A power line is disposed between the first and third contacts. The fourth contact is used for a secure connection to the positive or negative terminal of the battery, and the second contact is used for connection to the main circuit of automotive electrical equipment or a relay control terminal. This application effectively solves the problem of the vehicle's electrical system being unable to quickly restore power after a traditional power master switch fuse blows, through the use of a protective shell and spare fuses.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and specifically to a retarder power switch. Background Technology

[0002] The main power switch plays a crucial role in a vehicle's electrical system. Its primary function is to control the connection between the power source and electrical equipment, ensuring the safe operation of the vehicle's electrical system. However, traditional automotive main power switches have several problems.

[0003] Currently, cars, trucks, vans, and buses are all equipped with a main power switch. This switch controls the on / off power supply to the entire vehicle. When not in use, disconnecting the power supply via the main power switch effectively prevents the battery from continuously discharging due to dark current in the electrical system while the vehicle is parked, preventing battery depletion and extending its lifespan. Simultaneously, during vehicle maintenance, repairs, or in the event of an electrical fault, the power can be quickly disconnected, putting the vehicle's electrical system in a de-energized state. This prevents electric shock accidents caused by accidental contact with live parts and also prevents serious safety hazards such as fires caused by short circuits during operation. However, existing main power switches often lack comprehensive circuit protection mechanisms. When the vehicle's electrical system experiences overload, short circuits, or other abnormal conditions, excessive current can cause serious damage to the vehicle's electrical equipment and wiring, and may even lead to fires or other safety accidents. While existing main power switches are equipped with fuses, in the event of overload, short circuits, or other abnormal conditions, the excessive current causes the fuse to blow, preventing damage to the vehicle's electrical equipment and wiring. However, once the fuse blows, the vehicle's electrical system will be without power and cannot be quickly restored. When this happens while the vehicle is in motion, the driver can only wait for roadside assistance or find a way to purchase insurance. This not only causes the vehicle to be unable to operate normally for an extended period, affecting travel efficiency, but may also lead to secondary accidents due to the vehicle being stopped in a dangerous area. Utility Model Content

[0004] In view of the above-mentioned prior art, in order to solve the problem that the vehicle electrical system will be in a power-off state after the fuse blows and the power supply cannot be quickly restored, this application proposes a retarder power master switch.

[0005] This application provides a main power switch for a retarder, which adopts the following technical solution:

[0006] A retarder power switch, characterized in that it comprises a housing and a bracket, the housing being hollow and forming a receiving cavity, the bottom wall of the receiving cavity having two stationary contacts, the two stationary contacts extending out of the housing having a first contact and a second contact; the housing being fixedly connected to the bracket, the bracket having a fixing block, the fixing block having a fuse and a protective shell mounted on it, the protective shell having multiple spare fuses; the fixing block having a third contact and a fourth contact, the two ends of the fuse being fixedly connected to the third contact and the fourth contact; a power line being provided between the first contact and the third contact, the fourth contact being used for a secure connection to the positive or negative terminal of the vehicle's battery, the second contact being used for connection to the vehicle's main electrical circuit or relay control terminal; when the fuse blows, the spare fuse can be connected to the third contact and the fourth contact.

[0007] By adopting the above technical solution and integrating a spare fuse into the protective housing, the cumbersome process of finding external replacement parts for traditional switches is avoided, enabling rapid restoration of power after a power outage. The fuse, as an overload protection element, conducts current during normal operation. When an overload or short circuit causes the fuse to blow, the operator can directly remove the spare fuse from the protective housing and quickly complete the electrical connection through the third and fourth contacts. The circuit can be restored in a short time without tools, solving the problem of waiting for rescue or purchasing external parts after a traditional switch fuse blows, and improving the emergency handling capability of the vehicle's electrical system.

[0008] Preferably, the top of the housing has a mounting hole, a rotating shaft passes through the mounting hole, a knob is provided at the mounting hole on the housing, one end of the rotating shaft is fixedly connected to the knob, the end of the rotating shaft away from the knob is located in the receiving cavity, and the end is provided with a contact piece for contacting the stationary contact.

[0009] By adopting the above technical solution, the operator can rotate the knob to drive the shaft to rotate, thereby making contact or separation between the contact piece and the stationary contact, thus controlling the on / off of the main power switch. The operation is convenient and the structure is stable.

[0010] Preferably, the outer wall of the rotating shaft is provided with a positioning pin, and the inner wall of the accommodating cavity is provided with a first positioning groove and a second positioning groove. The first positioning groove and the second positioning groove are connected by a slide rail, and the positioning pin is slidably disposed in the slide rail.

[0011] By adopting the above technical solution, the positioning pin, positioning groove, and slide rail cooperate to form a mechanical limiting structure: when the knob is in the initial position, the positioning pin is located in the first positioning groove, and the contact piece is separated from the stationary contact (disconnected state); when the knob is rotated to make the positioning pin slide into the second positioning groove, the contact piece is tightly engaged with the stationary contact (conductive state), ensuring the stability of the switch state and avoiding accidental contact due to vibration and other factors.

[0012] Preferably, two clamping plates are sleeved on the rotating shaft, and the two clamping plates are respectively located on both sides of the contact plate.

[0013] By adopting the above technical solution, the clamping plate fixes the position of the contact piece on the rotating shaft by axial limiting, preventing the contact piece from moving axially during rotation, ensuring that the contact position between the contact piece and the stationary contact is accurate each time the circuit is turned on, and improving the reliability and contact stability of the switch.

[0014] Preferably, a positioning ring is provided on the rotating shaft along the circumferential direction, and a positioning spring abuts against the positioning ring and the contact piece.

[0015] By adopting the above technical solution, the positioning spring presses the contact piece tightly onto the stationary contact point through elastic force, compensating for the mechanical wear gap caused by long-term use, ensuring that the contact piece and the stationary contact point always maintain a tight electrical connection, reducing contact resistance, and avoiding circuit failure caused by poor contact.

[0016] Preferably, the housing is provided with positioning platforms on both sides, and the positioning platforms are provided with connecting holes. The bracket includes a horizontal plate and a vertical plate. The horizontal plate is provided with threaded connecting holes that are adapted to the connecting holes. The positioning platforms are fixedly connected to the horizontal plate by bolts. There are two vertical plates, which are provided on both sides of the horizontal plate. The fixing blocks are fixedly installed on the vertical plates.

[0017] By adopting the above technical solution, the positioning platform and the horizontal plate are connected by bolts to form a rigid fixed structure, ensuring the connection strength between the shell and the bracket; the double vertical plate design enhances the lateral stability of the bracket, and the fixing block is installed on the vertical plate, so that the safety plate assembly and the shell form an independent modular structure, which is convenient for disassembly and maintenance.

[0018] Preferably, a protective pad is provided between the fixing block and the vertical plate.

[0019] By adopting the above technical solution, the protective pad is made of insulating and wear-resistant materials, which can buffer the vibration and friction between the fixing block and the vertical plate, reduce mechanical wear, and avoid electrochemical corrosion caused by direct contact between metal parts, thus extending the overall service life of the switch.

[0020] Preferably, the protective shell is provided with a snap-fit ​​block, the fixing block has a snap-fit ​​groove, the protective shell is snapped and fixed by the snap-fit ​​block and the snap-fit ​​groove, the protective shell has a snap-fit ​​hole, a buckle is snapped in the snap-fit ​​hole, and the spare safety piece is fixed on the protective shell by the buckle.

[0021] By adopting the above technical solution, the protective shell can be quickly installed on the fixing block through a snap-fit ​​structure, which facilitates the removal and replacement of the fuse. The spare fuse is fixed to the surface of the protective shell by a snap-fit, forming a standardized storage and retrieval structure. Operators can complete the picking and putting actions with one hand, which improves the efficiency of emergency replacement. At the same time, the protective shell can isolate external impurities such as dust and moisture, and protect the electrical connection performance of the fuse and the contacts.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By integrating a spare fuse into the protective housing, the cumbersome process of finding replacement parts externally is avoided, which is necessary for traditional switches, and power can be quickly restored after a power outage. The fuse acts as an overload protection element and conducts current when it is working normally. When an overload or short circuit causes the fuse to blow, the operator can directly remove the spare fuse from the protective housing and quickly complete the electrical connection through the third and fourth contacts. The circuit can be restored in a short time without tools, which solves the problem of waiting for rescue or purchasing external parts after the fuse of a traditional switch blows, and improves the emergency handling capability of the vehicle's electrical system.

[0024] 2. The positioning spring presses the contact piece against the stationary contact point with its elastic force, compensating for the mechanical wear gap caused by long-term use, ensuring that the contact piece and the stationary contact point always maintain a tight electrical connection, reducing contact resistance, and avoiding circuit failure caused by poor contact;

[0025] 3. The protective housing is quickly installed on the fixing block via a snap-fit ​​structure, facilitating the removal and replacement of the fuse. The spare fuse is fixed to the surface of the protective housing via a snap-fit, forming a standardized storage and retrieval structure. Operators can complete the retrieval and placement actions with one hand, improving emergency replacement efficiency. At the same time, the protective housing can isolate external impurities such as dust and moisture, protecting the electrical connection performance of the fuse and contacts. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 yes Figure 1 Cross-sectional view at point AA;

[0028] Figure 3 yes Figure 1 Cross-sectional view at point BB;

[0029] Figure 4 This is an exploded view of this utility model;

[0030] Figure 5 This is a schematic diagram illustrating the first and second tentacles of this utility model;

[0031] Figure 6This is a schematic diagram illustrating the third contact, fourth contact, fixing block, and protective shell of this utility model.

[0032] Reference numerals: 1. Housing; 2. Bracket; 21. Horizontal plate; 211. Positioning hole; 22. Vertical plate; 3. Mounting hole; 4. Receiving cavity; 5. Knob; 6. Rotating shaft; 7. Return spring; 8. Stationary contact; 9. Contact piece; 10. Positioning pin; 11. First positioning groove; 12. Second positioning groove; 13. Slide rail; 14. Clamping piece; 15. Positioning ring; 16. Positioning spring; 17. Positioning platform; 18. Threaded connection hole; 19. First contact foot; 20. Second contact foot; 23. Fixing plate; 231. Fixing hole; 24. Fixing block; 241. Snap-fit ​​groove; 25. Third contact foot; 26. Fourth contact foot; 27. Power cord; 28. Safety piece; 29. ​​Protective pad; 30. Protective shell; 301. Snap-fit ​​block; 31. Snap-fit ​​hole; 32. Buckle. Detailed Implementation

[0033] This application discloses a retarder power master switch.

[0034] A retarder main power switch, as shown in the reference Figure 1 and Figure 2 The device includes a housing 1 and a bracket 2, with the housing 1 and bracket 2 bolted together. The top of the housing 1 has a mounting hole 3. The housing 1 is hollow and has an internal cavity 4. The mounting hole 3 is connected to the cavity 4. A knob is rotatably mounted on the housing 1. A rotating shaft 6 passes through the mounting hole 3. One end of the rotating shaft 6 is fixedly connected to the knob 5. The end of the rotating shaft 6 away from the knob passes through the mounting hole 3 and is located in the cavity 4. A return spring 7 is provided between the knob 5 and the outer wall of the housing 1. A stationary contact 8 is provided on the bottom wall of the accommodating cavity 4. The stationary contact 8 extends outward from the housing 1 with a contact foot. A contact piece 9 for contacting the contact to conduct the circuit is provided at the end of the rotating shaft 6 away from the knob 5. A positioning pin 10 is provided on the outer wall of the rotating shaft 6. The positioning pin 10 is located in the accommodating cavity 4. A first positioning groove 11 and a second positioning groove 12 for limiting the sliding of the positioning pin 10 are provided on the inner wall of the accommodating cavity 4. The first positioning groove 11 and the second positioning groove 12 are connected by a smooth slide 13, and the positioning pin 10 is slidably disposed in the slide 13.

[0035] When knob 5 is in its initial position, the positioning pin 10 is located in the first positioning groove 11, and the contact piece 9 is separated from the stationary contact 8. In use, the operator rotates knob 5, which drives the rotating shaft 6 to rotate. Since the positioning pin 10 on the outer wall of the rotating shaft 6 is located in the slide rail 13 on the inner wall of the accommodating cavity 4, the positioning pin 10 slides along the slide rail 13 between the first positioning groove 11 and the second positioning groove 12 as knob 5 rotates. During this process, the rotating shaft 6 drives the contact piece 9 to rotate synchronously. When knob 5 rotates to a certain angle, the positioning pin 10 slides into the second positioning groove 12, and the contact piece 9 rotates with the rotating shaft 6 until it contacts the stationary contact 8.

[0036] Reference Figure 3 and Figure 4 Furthermore, the end of the rotating shaft 6 away from the knob 5 passes through the contact piece 9. Two clamping pieces 14 are sleeved on the rotating shaft 6. The two clamping pieces 14 are respectively located at the two ends of the contact piece 9 near and away from the knob 5, forming a clamping and positioning of the contact piece 9. This ensures that the contact piece 9 is accurately positioned on the rotating shaft 6. Each time the rotating shaft 6 is rotated, the contact piece 9 can contact the stationary contact 8 at a consistent angle and position, ensuring the stable and reliable performance of the main power switch.

[0037] A positioning ring 15 is provided circumferentially on the rotating shaft 6. A positioning spring 16 for pressing the contact piece 9 is also provided between the positioning ring 15 and the contact piece 9. By providing the positioning spring 16, the contact piece 9 can be effectively pressed, ensuring that when the rotating shaft 6 moves close to the stationary contact point 8 and the positioning pin 10 is engaged in the second positioning groove 12, the contact piece 9 can effectively abut against the stationary contact point 8.

[0038] Furthermore, positioning platforms 17 are provided on both sides of the housing 1, and connecting holes are provided on both positioning platforms 17. Bolts are inserted into the connecting holes. Threaded connecting holes 18 that are compatible with the bolts on the positioning platforms 17 are provided on the bracket 2, and the positioning platforms 17 are threadedly fixedly connected to the threaded connecting holes 18 of the bracket 2 by bolts.

[0039] Reference Figure 5 and Figure 6 Specifically, there are two stationary contacts 8, which in turn have two contact feet: a first contact foot 19 and a second contact foot 20. Both the first contact foot 19 and the second contact foot 20 pass through the bracket 2. The bracket 2 includes a horizontal plate 21 and a vertical plate 22. The horizontal plate 21 is located at the bottom of the housing 1, and the positioning platform 17 is bolted to the horizontal plate 21. There are two vertical plates 22, which are located on both sides of the horizontal plate 21. The horizontal plate 21 has positioning holes 211 for the contact feet to pass through. During installation, the positioning platform 17 is bolted to the horizontal plate 21, at which time the first contact foot 19 and the second contact foot 20 pass through the positioning holes 211 respectively.

[0040] Both vertical plates 22 on both sides are provided with fixing plates 23. The fixing plates 23 are located at the ends of the vertical plates 22 away from the horizontal plates 21, and the fixing plates 23 have fixing holes 231 for connecting with external mechanisms. A fixing block 24 is provided on one side of the vertical plate 22. The two ends of the fixing block 24 are fixedly connected to the vertical plate 22 by bolts. The side of the fixing block 24 away from the vertical plate 22 is provided with a third contact 25 and a fourth contact 26. In this embodiment, the contacts are all threaded rods.

[0041] Furthermore, two nuts are provided on each of the first contact 19, the second contact, the third contact, and the fourth contact, with a washer placed between the two nuts. A power line 27 is provided between the first contact 19 and the third contact 25. The power line 27 has ring terminals at both ends. The power line 27 is sleeved on the first contact 19 and the third contact 25 through the ring terminals at both ends, and the ring terminals are located between the two nuts and are clamped and fixed by the two nuts. A fuse 28 is provided between the third contact 25 and the fourth contact 26. The fuse 28 has ring structures at both ends. The fuse 28 is sleeved on the third contact 25 and the fourth contact 26 through the ring structures at both ends and is clamped and fixed by the two nuts. The end of the fuse 28 closest to the third contact 25 abuts against the ring terminal of the power line 27.

[0042] A protective pad 29 is provided between the fixing block 24 and the vertical plate 22 to prevent the fixing block 24 and the vertical plate 22 from directly contacting each other and causing friction and wear, thus extending the service life of both.

[0043] Furthermore, the fourth contact 26 is used to connect to the positive or negative terminal of the vehicle's battery, and the second contact is used to connect to the main circuit or relay control terminal of the vehicle's electrical equipment, which can directly cut off the current loop of the entire vehicle's circuit. In use, first, firmly connect the fourth contact 26 to the positive or negative terminal of the vehicle's battery, and reliably connect the second contact 20 to the main circuit or relay control terminal of the vehicle's electrical equipment, thus constructing a complete circuit infrastructure. The operator rotates the knob 5 clockwise, causing the rotating shaft 6 to rotate. The positioning pin 10 slides along the slide rail 13 from the first positioning groove 11 to the second positioning groove 12, and the contact piece 9 rotates with the rotating shaft 6 until it is tightly fitted with the stationary contact 8. At this time, current flows from the battery through the fourth contact 26, is conducted through the fuse 28, the third contact 25, and the power line 27 to the first contact 19, and then through the second contact 20 to the vehicle's electrical equipment, ensuring smooth operation of the entire vehicle's circuit and normal operation of all electrical equipment.

[0044] Specifically, the fixing block 24 is provided with a protective shell 30, and the fixing block 24 is provided with a snap-fit ​​groove 241. The protective shell 30 is provided with a snap-fit ​​block 301 for snap-fitting and fixing with the snap-fit ​​groove 241. The protective shell 30 covers the fixing block 24, completely enclosing the fuse 28, power cord 27, third contact 25 and fourth contact 26, and isolating them from external environmental interference in all directions.

[0045] The protective housing 30 is also equipped with multiple spare fuses 28. Each fuse 28 has a corresponding annular opening 31 at both ends, with a latch 32 secured within the opening. The spare fuses 28 are fixed to the protective housing 30 via the latches 32. The spare fuses 28 can be activated promptly in case of fuse 28 blowing, preventing overloads, short circuits, or other problems that could occur due to lack of protection, thus protecting the vehicle's electrical system from further damage and potential accidents.

[0046] The implementation principle of the application embodiment is as follows: by rotating the knob 5, the rotating shaft 6 is driven to rotate, causing the positioning pin 10 to slide in the slide rail 13, thereby realizing the contact piece 9 and the stationary contact 8 to contact or separate, thereby controlling the on and off of the main power switch; when the vehicle is running, the fuse 28 protects the circuit, and after it blows, the spare fuse 28 can be quickly replaced to restore power supply; in addition, the cooperation between various components, such as the clamping piece 14 positioning the contact piece 9, the positioning spring 16 ensuring good electrical contact, the positioning platform 17 and the positioning hole 211 ensuring structural stability, the protective pad 29 reducing friction and wear, the return spring 7 facilitating operation and preventing misoperation, and the protective shell 30 isolating external impurities, together ensure the stable and reliable operation of the main power switch and meet the usage requirements of the vehicle's electrical system.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A main power switch for a retarder, characterized in that, The device includes a housing (1) and a support (2). The housing (1) is hollow and has a cavity (4). The bottom wall of the cavity (4) has two stationary contacts (8). The two stationary contacts (8) extend out of the housing (1) and are provided with a first contact (19) and a second contact (20). The housing (1) is fixedly connected to the support (2). The support (2) has a fixing block (24). A safety plate (28) is installed on the fixing block (24). A protective shell (30) is provided on the fixing block (24). A plurality of spare safety plates (28) are provided on the protective shell (30). The fixing block (24) is provided with a third contact (25) and a fourth contact (26). The two ends of the fuse (28) are fixedly connected to the third contact (25) and the fourth contact (26). A power line (27) is provided between the first contact (19) and the third contact (25). The fourth contact (26) is used to be stably connected to the positive or negative terminal of the car battery. The second contact (20) is used to be connected to the main circuit of the car electrical equipment or the relay control terminal. When the fuse (28) blows, the spare fuse (28) can be connected to the third contact (25) and the fourth contact (26).

2. A power supply master switch for a retarder according to claim 1, wherein The top of the housing (1) is provided with a mounting hole (3), and a rotating shaft (6) is inserted through the mounting hole (3). A knob (5) is provided on the housing (1) at the mounting hole (3). One end of the rotating shaft (6) is fixedly connected to the knob (5). The end of the rotating shaft (6) away from the knob (5) is located in the accommodating cavity (4), and the end is provided with a contact piece (9) for contacting the stationary contact (8).

3. A power supply master switch for a retarder according to claim 2, wherein The outer wall of the rotating shaft (6) is provided with a positioning pin (10), and the inner wall of the accommodating cavity (4) is provided with a first positioning groove (11) and a second positioning groove (12). The first positioning groove (11) and the second positioning groove (12) are connected through a slide rail (13), and the positioning pin (10) is slidably disposed in the slide rail (13).

4. A power supply master switch for a retarder according to claim 2, wherein Two clamping pieces (14) are fitted on the rotating shaft (6), and the two clamping pieces (14) are located on both sides of the contact piece (9).

5. A power supply master switch for a retarder according to claim 2, wherein A positioning ring (15) is provided circumferentially on the rotating shaft (6), and a positioning spring (16) abuts against the positioning ring (15) and the contact piece (9).

6. A power supply master switch for a retarder according to claim 1, wherein The housing (1) is provided with positioning platforms (17) on both sides. The positioning platforms (17) are provided with connecting holes. The bracket (2) includes a horizontal plate (21) and a vertical plate (22). The horizontal plate (21) is provided with a threaded connecting hole (18) that matches the connecting hole. The positioning platform (17) is fixedly connected to the horizontal plate (21) by bolts. There are two vertical plates (22). The two vertical plates (22) are provided on both sides of the horizontal plate (21). The fixing block (24) is fixedly installed on the vertical plate (22).

7. A power supply master switch for a retarder according to claim 6, wherein A protective pad (29) is provided between the fixing block (24) and the vertical plate (22).

8. A power supply master switch for a retarder according to claim 1, wherein, The protective shell (30) is provided with a snap-fit ​​block (301), and the fixing block (24) is provided with a snap-fit ​​groove (241). The protective shell (30) is snapped and fixed by the snap-fit ​​block (301) and the snap-fit ​​groove (241). The protective shell (30) is provided with a snap-fit ​​hole (31), and a buckle (32) is snapped into the snap-fit ​​hole (31). The spare safety piece (28) is fixed to the protective shell (30) by the buckle (32).

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