Overload protection switch terminal

Abstract

The utility model relates to the technical field of power protectors, and discloses an overload protection switch terminal which comprises a shell, a mounting mechanism is arranged on the shell, a piston seat is fixedly mounted on the inner wall of the left side of the shell, a piston cavity is formed in the piston seat, hydraulic oil is arranged in the piston cavity, a pushing mechanism is arranged in the piston cavity, and a wiring end is arranged on the left side of the shell. The overload protection device has the following advantages and effects that the pushing mechanism is arranged, the piston plate and the push rod can be pushed to move rightwards through heating expansion of hydraulic oil, the movable contact piece can be driven to be separated from the static contact, so that a circuit is cut off, and the purpose of an overload protection function can be achieved; according to the utility model, the spring can pull the push rod and the piston plate to reset leftwards through the resilience force of the spring, the movable contact piece can be contacted with the static contact again, the circuit can be recovered to the conducting state, and the purposes of automatically electrifying the switch terminal and being convenient to use can be further achieved.

Description

Technical Field

[0001] The present application relates to the technical field of power supply protectors, and in particular to an overload protection switch terminal. Background Art

[0002] The overload protection of a switch means that when a short circuit occurs inside the switch, the switch will automatically disconnect due to the overload protection device, thereby cutting off the connected power supply and protecting the powered devices from damage.

[0003] After searching, the patent document with authorization announcement number CN222088508U discloses an overload protection switch, the key points of its technical solution are that it includes a protective shell, a metal spring positioned in the protective shell, an action piece positioned in the protective shell and capable of conducting with the metal spring piece, a moving terminal electrically connected to the action piece, an N terminal partially extending out of the protective shell, an L terminal connected to the metal spring piece, a switch body for pressing down the metal spring piece, and a switch cap elastically connected to the protective shell and located outside the protective shell. It also includes a connection spring piece arranged opposite to the action piece and in a bent shape, and an adjusting screw threadedly connected to the protective shell, the adjusting screw is provided with an annular groove coaxial with the adjusting screw, a card slot is provided on the end of the action piece facing the connection spring piece, and both ends of the connection spring piece are respectively provided with a card foot that can be inserted into the annular groove and a card foot that engages with the card slot, thereby solving the problem of small application scope of the prior art.

[0004] It is found in actual use that the existing overload protection switch terminal needs to be manually operated to restore power, which makes it impossible to automatically power on the switch terminal, which in turn causes the problem of inconvenience in use. Therefore, we propose an overload protection switch terminal to solve the above problem. Summary of the invention

[0005] The purpose of the present application is to solve the disadvantage in the prior art that the switch terminal can be automatically energized, which leads to inconvenience in use, and to propose an overload protection switch terminal.

[0006] The above-mentioned technical purpose of the present application is achieved through the following technical scheme: an overload protection switch terminal, including a shell, a mounting mechanism is arranged on the shell, a piston seat is fixedly installed on the left inner wall of the shell, a piston cavity is opened in the piston seat, hydraulic oil is arranged in the piston cavity, a pushing mechanism is arranged in the piston cavity, a wiring terminal is arranged on the left side of the shell, the right end of the wiring terminal extends to the right side of the piston seat, and the wiring terminal is located outside the piston cavity; the top inner wall and the bottom inner wall of the shell are rotatably installed with the same rotating shaft, and an alarm mechanism is arranged between the rotating shaft and the shell.

[0007] The present application is further configured as follows: the mounting mechanism includes a mounting seat and screw holes, the mounting seats are fixedly mounted on the top and bottom of the shell, and the mounting seats are provided with screw holes.

[0008] By adopting the above technical solution and providing a mounting mechanism, bolts can be used to fix the mounting seat at a specified position through screw holes, thereby achieving the purpose of installing and fixing the shell.

[0009] The further configuration of the present application is: the pushing mechanism includes a piston plate push rod and a push plate, the piston plate is slidably installed in the piston cavity, the piston plate is located on the right side of the hydraulic oil, a push rod is fixedly installed on the right side of the piston plate, the right end of the push rod extends to the outside of the piston seat, a push plate is fixedly installed on the rear end of the push rod, a switch mechanism is arranged between the push rod and the wiring terminal, and a gear mechanism is arranged between the push plate and the rotating shaft.

[0010] By adopting the above technical solution and providing a pushing mechanism, the hydraulic oil can expand when heated, thereby achieving the purpose of pushing the piston plate and the push rod to move to the right.

[0011] The present application is further configured as follows: the switch mechanism includes a static contact and a moving contact piece, the static contact is arranged at the right end of the terminal, the moving contact piece is arranged at the right end of the push rod, and the moving contact piece is electrically connected to the static contact.

[0012] By adopting the above technical solution and providing a switch mechanism, electricity can be supplied when the static contact and the moving contact piece are in contact.

[0013] The present application is further configured as follows: the gear mechanism includes a rack plate and a gear, a rack plate is fixedly mounted on the right side of the push plate, a gear is fixedly sleeved on the rotating shaft, and the rack plate is meshed with the gear.

[0014] By adopting the above technical solution and providing a gear mechanism, the push plate can drive the rack plate to move left and right, thereby achieving the purpose of driving the rotating shaft to rotate through the rack plate and the gear.

[0015] The present application is further configured as follows: the alarm mechanism includes a cam and a metal sheet, a fixed sleeve on the rotating shaft is provided with a cam, the cam is located outside the gear, a metal sheet is provided on the right inner wall of the shell, and the cam is adapted to the metal sheet.

[0016] By adopting the above technical solution and providing an alarm mechanism, the rotating shaft can drive the cam to rotate, so that the cam can hit the metal sheet to make a sound, thereby achieving the purpose of power-off alarm.

[0017] The present application is further configured as follows: sound holes are provided on the top and the bottom of the shell, and the sound holes are adapted to the metal sheets.

[0018] By adopting the above technical solution and providing a sound hole, the impact sound of the cam and the metal sheet can be diffused through the sound hole, thereby achieving the purpose of amplifying the alarm sound.

[0019] The present application is further configured as follows: a spring is fixedly mounted on the right side of the piston seat, the spring is located between the wiring terminal and the push rod, and the right end of the spring is fixedly connected to the left side of the moving contact piece.

[0020] By adopting the above technical solution and providing a spring, the spring rebound force can drive the movable contact piece to reset, so that the movable contact piece can re-contact with the static contact point, and the circuit can be restored to the conductive state.

[0021] The beneficial effects of this application are:

[0022] (1) Through the cooperation of the piston plate, the push rod and the moving contact piece, when an overload fault occurs in the circuit, the abnormal increase in current at the terminal generates Joule heat, and the hydraulic oil expands due to heat, pushing the piston plate and the push rod to the right, which can drive the moving contact piece to separate from the static contact, thereby cutting off the circuit and achieving the purpose of the overload protection function;

[0023] (2) Through the cooperation of the push rod, the push plate, the rack plate, the gear, the rotating shaft, the cam and the metal sheet, the push rod can drive the cam to rotate, the cam can collide with the metal sheet, a sound signal can be generated, and the purpose of the overload alarm function can be achieved;

[0024] (3) Through the cooperation between the spring and the moving contact piece, the spring can pull the push rod and the piston plate to the left through its own rebound force, so that the moving contact piece can re-contact with the static contact point, and the circuit can be restored to the conductive state, thereby realizing the automatic power-on of the switch terminal, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a three-dimensional structural schematic diagram of an overload protection switch terminal of the present application;

[0027] Figure 2 This is a schematic diagram of the internal structure of a housing of an overload protection switch terminal of the present application;

[0028] Figure 3 This is a schematic diagram of the internal structure of a piston seat of an overload protection switch terminal of the present application;

[0029] Figure 4 This is a schematic diagram of the A structure of an overload protection switch terminal of the present application.

[0030] In the figure: 1. housing; 101. mounting seat; 2. piston seat; 201. piston plate; 202. push rod; 203. push plate; 3. terminal; 301. static contact; 302. moving contact piece; 4. rotating shaft; 401. cam; 402. metal sheet; 5. rack plate; 6. gear; 7. sound hole; 8. spring. DETAILED DESCRIPTION

[0031] The technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0032] See also Figure 1-Figure 4 The present application provides an overload protection switch terminal, including a shell 1, on which a mounting mechanism is arranged, a piston seat 2 is fixedly mounted on the left inner wall of the shell 1, a piston cavity is opened in the piston seat 2, hydraulic oil is arranged in the piston cavity, a pushing mechanism is arranged in the piston cavity, a terminal 3 is arranged on the left side of the shell 1, the right end of the terminal 3 extends to the right side of the piston seat 2, and the terminal 3 is located outside the piston cavity; the same rotating shaft 4 is rotatably mounted on the top inner wall and the bottom inner wall of the shell 1, and an alarm mechanism is arranged between the rotating shaft 4 and the shell 1.

[0033] Specifically, the mounting mechanism includes a mounting seat 101 and screw holes. The mounting seat 101 is fixedly mounted on the top and the bottom of the housing 1 , and the mounting seat 101 is provided with screw holes.

[0034] Specifically, the pushing mechanism includes a piston plate 201, a push rod 202 and a push plate 203. The piston plate 201 is slidably installed in the piston cavity. The piston plate 201 is located on the right side of the hydraulic oil. A push rod 202 is fixedly installed on the right side of the piston plate 201. The right end of the push rod 202 extends to the outside of the piston seat 2. A push plate 203 is fixedly installed on the rear end of the push rod 202. A switch mechanism is arranged between the push rod 202 and the terminal 3, and a gear mechanism is arranged between the push plate 203 and the rotating shaft 4.

[0035] Specifically, the switch mechanism includes a static contact 301 and a moving contact piece 302 . The static contact 301 is disposed at the right end of the terminal 3 , and the moving contact piece 302 is disposed at the right end of the push rod 202 . The moving contact piece 302 is electrically connected to the static contact 301 .

[0036] Specifically, the gear mechanism includes a rack plate 5 and a gear 6. The rack plate 5 is fixedly installed on the right side of the push plate 203. The gear 6 is fixedly sleeved on the rotating shaft 4. The rack plate 5 is meshed with the gear 6.

[0037] Specifically, the alarm mechanism includes a cam 401 and a metal sheet 402 . The cam 401 is fixedly sleeved on the rotating shaft 4 and is located outside the gear 6 . The metal sheet 402 is provided on the right inner wall of the housing 1 and the cam 401 and the metal sheet 402 are matched.

[0038] Specifically, the top and the bottom of the housing 1 are both provided with sound holes 7 , and the sound holes 7 are matched with the metal sheet 402 .

[0039] Specifically, a spring 8 is fixedly installed on the right side of the piston seat 2 , the spring 8 is located between the terminal 3 and the push rod 202 , and the right end of the spring 8 is fixedly connected to the left side of the moving contact piece 302 .

[0040] In the present application, when working, under normal operating conditions of the overload protection switch terminal, the terminal 3 carries current, and the moving contact 302 maintains an electrically connected state with the static contact 301 to ensure the conductivity of the circuit. When an overload fault occurs in the circuit, the terminal 3 generates Joule heat due to the abnormal increase in current. The heat is transferred to the hydraulic oil in the piston cavity in the piston seat 2 through heat conduction. According to the principle of thermal expansion and contraction, the hydraulic oil expands due to heat, and the pressure generated pushes the piston plate 201 to move linearly to the right along the piston cavity, and the piston The displacement of the plate 201 drives the push rod 202 connected thereto to move right synchronously. During the movement, the push rod 202 applies a tensile force to the spring 8, causing the spring 8 to undergo elastic deformation. At the same time, the push rod 202 drives the moving contact piece 302 to separate from the static contact 301, thereby cutting off the circuit and achieving the purpose of the overload protection function. When the push rod 202 moves right, the push plate 203 at its rear end moves in the same direction. The rack plate 5 on the right side of the push plate 203 and the gear 6 on the rotating shaft 4 form a gear rack transmission pair. The linear movement of the rack plate 5 The movement is converted into the circular rotation of the gear 6, which in turn drives the shaft 4 to rotate synchronously. The cam 401 installed on the shaft 4 rotates with the shaft 4. During the rotation process, the cam 401 can periodically contact and impact with the metal sheet 402 through the contour curve of the cam 401, which can cause the metal sheet 402 to vibrate mechanically, thereby generating a sound signal. The sound signal is transmitted outward through the sound holes 7 opened at the top and bottom of the shell 1, which can achieve the purpose of the overload alarm function. When the overload fault is eliminated, the hydraulic oil temperature gradually decreases, the volume shrinks, and the spring 8 shrinks through the rebound force, which can pull the push rod 202 and the piston plate 201 to reset to the left, and the moving contact piece 302 re-contacts with the static contact 301, which can realize the circuit restoration The conductive state, and then the switch terminal can be automatically energized for the purpose of facilitating use; at the same time, the push plate 203 and the rack plate 5 move left, driving the gear 6, the shaft 4 and the cam 401 to rotate in the opposite direction until each component returns to the initial position, preparing for the next possible overload protection action.

Claims

1. An overload protection switch terminal, characterized in that: The invention comprises a shell (1), wherein a mounting mechanism is arranged on the shell (1), a piston seat (2) is fixedly mounted on the left inner wall of the shell (1), a piston cavity is provided in the piston seat (2), hydraulic oil is arranged in the piston cavity, a pushing mechanism is arranged in the piston cavity, a wiring terminal (3) is arranged on the left side of the shell (1), the right end of the wiring terminal (3) extends to the right side of the piston seat (2), and the wiring terminal (3) is located outside the piston cavity; the top inner wall and the bottom inner wall of the shell (1) are rotatably mounted with the same rotating shaft (4), and an alarm mechanism is arranged between the rotating shaft (4) and the shell (1).

2. An overload protection switch terminal according to claim 1, characterized in that: The mounting mechanism comprises a mounting seat (101) and a screw hole; the mounting seat (101) is fixedly mounted on the top and the bottom of the housing (1); and the mounting seat (101) is provided with a screw hole.

3. The overload protection switch terminal according to claim 1, characterized in that: The pushing mechanism comprises a piston plate (201), a push rod (202) and a push plate (203); the piston plate (201) is slidably mounted in the piston cavity; the piston plate (201) is located on the right side of the hydraulic oil; a push rod (202) is fixedly mounted on the right side of the piston plate (201); the right end of the push rod (202) extends to the outside of the piston seat (2); a push plate (203) is fixedly mounted on the rear end of the push rod (202); a switch mechanism is arranged between the push rod (202) and the terminal (3); and a gear mechanism is arranged between the push plate (203) and the rotating shaft (4).

4. An overload protection switch terminal according to claim 3, characterized in that: The switch mechanism comprises a static contact (301) and a moving contact piece (302); the static contact (301) is arranged at the right end of the connection terminal (3); the moving contact piece (302) is arranged at the right end of the push rod (202); and the moving contact piece (302) is electrically connected to the static contact (301).

5. The overload protection switch terminal according to claim 3, characterized in that: The gear mechanism comprises a rack plate (5) and a gear (6); the rack plate (5) is fixedly mounted on the right side of the push plate (203); the gear (6) is fixedly sleeved on the rotating shaft (4); and the rack plate (5) is meshed with the gear (6).

6. The overload protection switch terminal according to claim 1, characterized in that: The alarm mechanism comprises a cam (401) and a metal sheet (402); a fixed sleeve on the rotating shaft (4) is provided with a cam (401); the cam (401) is located outside the gear (6); a metal sheet (402) is provided on the right inner wall of the housing (1); the cam (401) and the metal sheet (402) are matched.

7. The overload protection switch terminal according to claim 1, characterized in that: The top and bottom of the shell (1) are both provided with sound holes (7), and the sound holes (7) are compatible with the metal sheet (402).

8. The overload protection switch terminal according to claim 1, characterized in that: A spring (8) is fixedly mounted on the right side of the piston seat (2); the spring (8) is located between the wiring terminal (3) and the push rod (202); and the right end of the spring (8) is fixedly connected to the left side of the moving contact piece (302).

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