Bimetallic thermal protector for small power motor

Abstract

The utility model discloses a bimetallic thermal protector for a small-power motor, and relates to the technical field of thermal protectors. The utility model comprises a motor body, a thermal protection device body and a protection device block, wherein a motor control board is fixedly mounted on the outside of the motor body, the thermal protection device body moves on the outside of the protection device block, and a metal thermal protection component is fixedly mounted on the outside of the thermal protection device body. In order to solve the problems that the existing circuit protector may be mistakenly triggered due to environmental conditions and power supply fluctuations, and the circuit protector itself may fail due to a fault, resulting in the inability to properly protect the electronic device, the metal thermal protection component is set. When the device is overheated due to overload, short circuit or other faults, the expansion speed of one of the metal sheets will far exceed that of the other metal sheet, causing the bimetallic sheet to bend or twist, so that it does not rely on complex electronic components or control systems, and thus has higher reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal protectors, in particular to a bimetallic thermal protector for low-power motors. Background Art

[0002] A circuit protector is a key device used to protect circuits and electrical equipment. Its background technology involves fields such as electrical engineering, electronics, and materials science. Overload is one of the common problems in circuits, which may cause overheating of wires, damage to equipment, and even fire. Circuit protectors can achieve overload protection by detecting whether the current exceeds the rated value. This can be achieved through current sensors, thermistors, or other technologies. Short circuits are another common problem in circuits, usually caused by direct contact between wires or failure of internal components of the device. Circuit protectors will detect short circuits and quickly cut off power to prevent excessive current from damaging equipment or causing fire.

[0003] Most of the existing circuit protection devices are circuit protectors, which may be falsely triggered by environmental conditions and power supply fluctuations, and the circuit protector itself may fail due to a fault, resulting in an inability to properly protect the electronic device. In response to the above problems, the applicant proposes a bimetallic thermal protector for small-power motors to solve the above problems. Utility Model Content

[0004] In order to solve the problem that existing circuit protectors may be falsely triggered due to environmental conditions and power fluctuations, and the circuit protector itself may fail due to faults, resulting in the inability to properly protect electronic devices, a metal thermal protection component is provided. When the device overheats due to overload, short circuit or other faults, the expansion speed of one of the metal sheets will far exceed that of the other metal sheet, causing the bimetallic sheet to bend or twist, making it independent of complex electronic components or control systems, and therefore having higher reliability.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a bimetallic thermal protector for a small power motor, comprising a motor body, a thermal protection device body and a protection device block, wherein a motor control board is fixedly installed on the outside of the motor body, the protection device block is fixedly installed on the outside of the motor control board, the thermal protection device body is movable on the outside of the protection device block, a metal thermal protection component is fixedly installed on the outside of the thermal protection device body, and the metal thermal protection component comprises a No. 1 thermal bending metal, a No. 2 thermal bending metal, a No. 1 fixing gasket, a No. 1 circular metal sheet, a No. 2 circular metal sheet and a metal fixing block;

[0006] A No. 1 metal rod is fixedly installed on the outside of the protection device block, and a quick-change assembly is movably connected to the outside of the No. 1 metal rod. The quick-change assembly includes a No. 2 slider, a sliding fixed block, a reset clamp and a pressure fixed block.

[0007] Preferably, the motor body is rotatably connected to a motor shaft externally, a connecting wire is fixedly installed externally on the motor control board, a connecting gasket is slidably connected externally on the No. 1 metal rod, and the connecting gasket is fixedly connected to the connecting wire.

[0008] Preferably, the metal fixing block is fixedly installed with the No. 1 hot-bent metal and the No. 2 hot-bent metal on the outside, the No. 1 hot-bent metal is fixedly installed with the No. 2 circular metal sheet on the outside, the No. 1 hot-bent metal is fixedly installed with the No. 1 circular metal sheet on the outside, and the No. 1 circular metal sheet and the No. 2 circular metal sheet are in contact with each other.

[0009] Preferably, a No. 1 fixed gasket is fixedly installed on the outside of the No. 1 metal rod, a sliding connecting rod is slidably connected to the outside of the No. 1 fixed gasket, a metal contact block is fixedly installed on the outside of the sliding connecting rod, and the metal contact block is in contact with the No. 2 hot-bent metal.

[0010] Preferably, a No. 1 spring is fixedly mounted on the outside of the metal contact block, and one end of the No. 1 spring away from the metal contact block is fixedly connected to the No. 1 fixing gasket.

[0011] Preferably, the second sliding block slides outside the first metal rod, and an interlocking fixing block is fixedly installed outside the second sliding block, and the interlocking fixing block is interlocked with the metal fixing block.

[0012] Preferably, the protection device block is slidably connected to a sliding fixed block on the outside, the sliding fixed block is slidably connected to the pressure fixed block, the pressure fixed block is fixedly installed with a No. 3 rotating shaft on the outside, the No. 3 rotating shaft is rotatably connected to the protection device block, a reset clamping spring is fixedly installed on the outside of the No. 3 rotating shaft, the end of the reset clamping spring away from the No. 3 rotating shaft is fixedly connected to the protection device block, and the pressure fixed block is fitted with the No. 2 sliding block.

[0013] Preferably, a threaded rod is fixedly installed at one end of the No. 1 metal rod away from the No. 1 fixing gasket, a gasket fixing screw is movably connected to the outside of the connecting gasket, the gasket fixing screw is fixedly connected to the No. 1 screw, and the No. 1 screw is threadedly connected to the No. 1 metal rod.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. In the utility model, by setting a metal thermal protection component, through the heat bending of the first heat bending metal and the second heat bending metal, when the equipment is overheated due to overload, short circuit or other faults, the first heat bending metal and the second heat bending metal bend in opposite directions, causing the bimetallic strip to bend and disconnect the circuit, so that it does not rely on complex electronic components or control systems, and thus has higher reliability;

[0016] 2. In the utility model, by setting up a quick replacement component, when the motor is protected by the protector due to overheating, the metal heat sink can be replaced quickly and conveniently. Since the metal heat sink is one of the main components of the protector, it is designed to be easy to replace, which can simplify the maintenance process and reduce maintenance costs and repair time. Overheating may cause safety risks such as equipment failure or fire. Timely replacement of the metal heat sink can reduce these risks and ensure the safety of personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 This is a cross-sectional view of the main structure of the thermal protection device of the utility model.

[0020] Figure 3 This is a schematic diagram of the main structure of the thermal protection device of the utility model.

[0021] Figure 4 This is a cross-sectional view of the protective device block structure of the utility model.

[0022] Figure 5 For this utility model Figure 3 A schematic diagram of the enlarged structure in the middle.

[0023] Figure 6 For this utility model Figure 4 Enlarged schematic diagram of the structure at point B in the middle.

[0024] In the figure: 1. Motor body; 101. Motor control board; 102. Motor shaft; 103. Connecting wires; 104. Connecting gasket; 2. Thermal protection device body; 201. No. 1 hot-bent metal; 202. No. 2 hot-bent metal; 203. Sliding connecting rod; 204. No. 1 spring; 205. No. 1 fixed gasket; 206. No. 1 metal rod; 207. Threaded rod; 208. Gasket fixing screw; 209. Metal fixing block; 210. No. 1 screw; 211. Metal contact block; 3. Protection device block; 301. No. 2 slider; 302. Pressure fixing block; 303. Reset retaining spring; 304. No. 3 shaft; 305. Sliding fixing block; 306. Engaging fixing block; 307. No. 1 round metal sheet; 308. No. 2 round metal sheet. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example: Figure 1-6 As shown, the utility model provides a bimetallic thermal protector for a small power motor, comprising a motor body 1, a thermal protection device body 2 and a protection device block 3, wherein a motor control board 101 is fixedly mounted on the outside of the motor body 1, the protection device block 3 is fixedly mounted on the outside of the motor control board 101, the thermal protection device body 2 is movable on the outside of the protection device block 3, a metal thermal protection component is fixedly mounted on the outside of the thermal protection device body 2, and the metal thermal protection component comprises a first heat-bent metal 201, a second heat-bent metal 202, a first fixing gasket 205, a first circular metal sheet 307, a second circular metal sheet 308 and a metal fixing block 209;

[0027] A No. 1 metal rod 206 is fixedly installed outside the protection device block 3, and a quick-change component is movably connected outside the No. 1 metal rod 206. The quick-change component includes a No. 2 slider 301, a sliding fixed block 305, a reset spring 303 and a pressure fixed block 302.

[0028] The motor body 1 is externally rotatably connected to the motor shaft 102, the motor control board 101 is externally fixedly installed with a connecting wire 103, the No. 1 metal rod 206 is externally slidably connected with a connecting gasket 104, the connecting gasket 104 is fixedly connected to the connecting wire 103, the metal fixing block 209 is externally fixedly installed with a No. 1 hot-bent metal 201 and a No. 2 hot-bent metal 202, the No. 1 hot-bent metal 201 is externally fixedly installed with a No. 2 circular metal sheet 308, the No. 2 hot-bent metal 202 is externally fixedly installed with a No. 1 circular metal sheet 307, and the No. 1 circular metal sheet 307 and the No. 2 circular metal sheet 308 are in close contact with each other.

[0029] By adopting the above technical solution, the first circular metal sheet 307 and the second circular metal sheet 308 are attached to each other, and the first heat-bending metal 201 and the second heat-bending metal 202 are bent by heat. When the device is overheated due to overload, short circuit or other faults, the first heat-bending metal 201 and the second heat-bending metal 202 are bent in opposite directions, causing the bimetallic strip to bend and disconnect the circuit, so that it does not rely on complex electronic components or control systems, and thus has higher reliability.

[0030] A No. 1 fixed gasket 205 is fixedly installed outside the No. 1 metal rod 206 , and a sliding connecting rod 203 is slidably connected outside the No. 1 fixed gasket 205 . A metal contact block 211 is fixedly installed outside the sliding connecting rod 203 , and the metal contact block 211 is in contact with the No. 2 hot-bent metal 202 .

[0031] By adopting the above technical solution, the metal contact block 211 is fitted with the second hot-bending metal 202, so that the current can be transferred to the second hot-bending metal 202 through the first metal rod 206. When the current flows to the first hot-bending metal 201 through the second hot-bending metal 202, the temperature of the first hot-bending metal 201 and the second hot-bending metal 202 can be increased.

[0032] A No. 1 spring 204 is fixedly mounted outside the metal contact block 211 , and one end of the No. 1 spring 204 away from the metal contact block 211 is fixedly connected to a No. 1 fixing gasket 205 .

[0033] By adopting the above technical solution, the end of the No. 1 spring 204 away from the metal contact block 211 is fixedly connected to the No. 1 fixed gasket 205, and the elastic force of the No. 1 spring 204 is released, so that the metal contact block 211 can always fit with the No. 2 hot-bent metal 202.

[0034] The second slide block 301 slides outside the first metal rod 206 , and an interlocking fixing block 306 is fixedly installed outside the second slide block 301 , and the interlocking fixing block 306 is interlocked with the metal fixing block 209 .

[0035] By adopting the above technical solution, the embedded fixing block 306 is embedded with the metal fixing block 209, and the embedded fixing block 306 can be used to limit the metal fixing block 209, so that the metal fixing block 209 can be fixed more stably.

[0036] The protection device block 3 is slidably connected to a sliding fixed block 305 on the outside, and the sliding fixed block 305 is slidably connected to the pressure fixed block 302. The pressure fixed block 302 is fixedly installed with a third rotating shaft 304 on the outside, and the third rotating shaft 304 is rotatably connected to the protection device block 3. A reset clamp 303 is fixedly installed on the outside of the third rotating shaft 304, and one end of the reset clamp 303 away from the third rotating shaft 304 is fixedly connected to the protection device block 3, and the pressure fixed block 302 is in contact with the second sliding block 301.

[0037] By adopting the above technical solution, the pressure fixing block 302 fits with the second slider 301 , so that the pressure fixing block 302 can drive the second slider 301 to move downward, and finally the second slider 301 fixes the metal fixing block 209 .

[0038] A threaded rod 207 is fixedly installed at one end of the No. 1 metal rod 206 away from the No. 1 fixed gasket 205, and a gasket fixing screw 208 is movably connected to the outside of the connecting gasket 104. The gasket fixing screw 208 is fixedly connected to the No. 1 screw 210, and the No. 1 screw 210 is threadedly connected to the No. 1 metal rod 206.

[0039] By adopting the above technical solution, the No. 1 screw 210 is threadedly connected to the No. 1 metal rod 206, and the washer fixing screw 208 can be used to fix the connection washer 104 and the No. 1 metal rod 206.

[0040] Working principle: When a bimetallic thermal protector is needed for a small-power motor, the protection device block 3 is fixedly installed on an outside, and the current flows to the second hot-bent metal 202 through the threaded rod 207, and then flows from the first hot-bent metal 201 to the first hot-bent metal 201, and finally flows to the motor through the connecting wire 103 to power it. When the equipment is overheated due to overload, short circuit or other faults, the first hot-bent metal 201 and the second hot-bent metal 202 bend in opposite directions, causing the bimetallic strip to bend and disconnect the circuit, thereby releasing the adhesion between the first circular metal sheet 307 and the second circular metal sheet 308, so that it does not rely on complex electronic components or control systems, and therefore has higher reliability;

[0041] When the thermal protection device body 2 needs to be replaced, slide the sliding fixed block 305, and move the pressure fixed block 302 upward through the third rotating shaft 304, so as to release the engagement between the engaging fixed block 306 and the metal fixed block 209, further replace the metal fixed block 209, and then push the sliding fixed block 305 to complete the replacement of the bimetallic thermal protector.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A bimetallic thermal protector for a low-power motor, comprising a motor body (1), a thermal protector body (2), a connecting gasket (104) and a protector block (3), characterized in that: A motor control board (101) is fixedly mounted on the outside of the motor body (1), the protection device block (3) is fixedly mounted on the outside of the motor control board (101), the thermal protection device body (2) is movable on the outside of the protection device block (3), and a metal thermal protection component is fixedly mounted on the outside of the thermal protection device body (2), the metal thermal protection component comprising a No. 1 thermally bent metal (201), a No. 1 screw (210), a metal contact block (211), a No. 2 thermally bent metal (202), a No. 1 fixing gasket (205), a No. 1 circular metal sheet (307), a No. 2 circular metal sheet (308) and a metal fixing block (209); A No. 1 metal rod (206) is fixedly mounted on the outside of the protection device block (3), and a quick-change assembly is movably connected to the outside of the No. 1 metal rod (206), wherein the quick-change assembly comprises a No. 2 sliding block (301), a sliding fixed block (305), a reset spring (303) and a pressure fixed block (302).

2. The bimetal thermal protector for a low-power motor according to claim 1, characterized in that: The motor body (1) is rotatably connected to a motor shaft (102) on the outside, the motor control board (101) is fixedly mounted with a connecting wire (103) on the outside, the No. 1 metal rod (206) is slidably connected to a connecting gasket (104) on the outside, and the connecting gasket (104) is fixedly connected to the connecting wire (103).

3. The bimetal thermal protector for a low-power motor according to claim 1, characterized in that: The first hot-bent metal (201) and the second hot-bent metal (202) are fixedly mounted on the outside of the metal fixing block (209), the second round metal sheet (308) is fixedly mounted on the outside of the first hot-bent metal (201), the first round metal sheet (307) is fixedly mounted on the outside of the second hot-bent metal (202), and the first round metal sheet (307) and the second round metal sheet (308) are fitted together.

4. The bimetal thermal protector for a low-power motor according to claim 1, characterized in that: A first fixed gasket (205) is fixedly mounted on the outside of the first metal rod (206), a sliding connecting rod (203) is slidably connected to the outside of the first fixed gasket (205), a metal contact block (211) is fixedly mounted on the outside of the sliding connecting rod (203), and the metal contact block (211) is in contact with the second hot-bent metal (202).

5. The bimetal thermal protector for a low-power motor according to claim 1, characterized in that: A No. 1 spring (204) is fixedly mounted on the outside of the metal contact block (211), and one end of the No. 1 spring (204) away from the metal contact block (211) is fixedly connected to the No. 1 fixing gasket (205).

6. The bimetal thermal protector for a low-power motor according to claim 1, characterized in that: The second sliding block (301) slides outside the first metal rod (206), and an interlocking fixing block (306) is fixedly installed outside the second sliding block (301), and the interlocking fixing block (306) is interlocked with the metal fixing block (209).

7. The bimetal thermal protector for a low-power motor according to claim 1, characterized in that: The protection device block (3) is slidably connected to a sliding fixed block (305) on the outside, and the sliding fixed block (305) is slidably connected to the pressure fixed block (302). The pressure fixed block (302) is fixedly installed with a third rotating shaft (304) on the outside, and the third rotating shaft (304) is rotatably connected to the protection device block (3). A reset clamping spring (303) is fixedly installed on the outside of the third rotating shaft (304), and one end of the reset clamping spring (303) away from the third rotating shaft (304) is fixedly connected to the protection device block (3), and the pressure fixed block (302) is in contact with the second sliding block (301).

8. The bimetal thermal protector for a low-power motor as claimed in claim 1, characterized in that: A threaded rod (207) is fixedly mounted on one end of the No. 1 metal rod (206) away from the No. 1 fixing gasket (205); a gasket fixing screw (208) is movably connected to the outside of the connecting gasket (104); the gasket fixing screw (208) is fixedly connected to the No. 1 screw (210); and the No. 1 screw (210) is threadedly connected to the No. 1 metal rod (206).

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