Motor overload thermal protector

Abstract

The utility model relates to the technical field of motor overload thermal protection, and discloses a motor overload thermal protector which is composed of a protector front cover, a rear cover and a top cover, an overload protection mechanism is arranged in the protector, a reset operation mechanism is arranged on the surface of the top cover, and the overload protection mechanism comprises a heating copper sheet, a binding post, a shifting fork and the like. Current is transmitted to the heating copper sheet through the binding post. When overload occurs, current is increased, so that heat of a heating copper sheet is increased, the heat is transmitted to a deformation copper sheet to deform the deformation copper sheet, related parts are driven to act, a shifting fork pushes a reset copper sheet to trigger a protection mechanism to cut off a circuit, response is rapid, and the safety coefficient is high; a current protection threshold can be set, normal reset and forced reset can be realized, and compared with the prior art, the protector effectively solves the problems of slow overheat detection response, untimely protection mechanism triggering and the like, and can better protect the safe operation of the motor.

Description

Technical Field

[0001] This utility model relates to the field of motor overload thermal protection technology, specifically to a motor overload thermal protector. Background Technology

[0002] Motors are widely used in industrial production, home appliances and other fields. During operation, motors often experience overload due to sudden load changes, abnormal voltage and other reasons, which causes the winding temperature to rise sharply. If not protected in time, it will accelerate the aging of insulation and even cause serious accidents such as short circuits and fires. Traditional thermal protectors have problems such as slow response and insufficient accuracy, which make it difficult to meet the modern demand for efficient and safe electricity. Therefore, it is urgent to develop more reliable motor overload thermal protectors.

[0003] According to a patent application published on the internet (authorization announcement number: CN218631813U), "This utility model discloses a motor overload thermal protector, including a protector body, a PTC chip mounted on the bottom surface of the protector body, a stationary contact provided on the top surface of the protector body, and a housing mounted on the protector body. A metal part is provided on the inner side of the housing, and a moving contact is mounted on one end of the metal part, with the stationary contact in contact with the moving contact. A wire output terminal is connected to the housing, and a wire input terminal is connected to the protector body. Adhesive-insulated paper is fixed between the protector body and the housing with glue, and a glue-permeable groove is provided on the housing to collect melted glue. This application has the advantage of good sealing performance."

[0004] Based on the above, the applicant believes the following deficiencies exist:

[0005] Existing devices may have the following drawbacks: slow circuit cut-off response after overheating detection, failing to protect the motor in time; ineffective triggering of protection mechanisms during overload, easily leading to motor damage; low overall safety factor, lack of reliable protection measures; poor coordination between components, unable to quickly drive related components to move, and unable to efficiently deal with motor overload problems. Utility Model Content

[0006] The purpose of this invention is to provide a motor overload thermal protector to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a motor overload thermal protector, including a front cover of the protector, a rear cover of the protector installed on the back of the front cover of the protector, a top cover installed on the top of the front cover and the rear cover of the protector, an overload protection mechanism provided inside the front cover and the rear cover of the protector, and a reset operation mechanism provided on the surface of the top cover.

[0008] The overload protection mechanism includes a heating copper sheet installed at the bottom front end of the inside of the protector's front cover. A terminal block is mounted on the surface of the heating copper sheet. A fork is installed at the bottom rear end of the inside of the protector's rear cover. A correction shaft is installed at the bottom middle section of the inside of the protector's rear cover. A reset copper sheet is installed at the left end of the middle section of the inside of the protector's rear cover. A reset plate is installed at the left end of the reset copper sheet. A connector is installed at the top left end of the inside of the top cover. A reset connector is installed at the bottom end of the connector. A component connector is installed inside the top cover, and a deformable copper sheet is mounted on the surface of the component connector. When the motor is running normally, the current is conducted to the heating copper sheet through the terminals. Once the motor is overloaded, the current increases, and the heat generated by the heating copper sheet increases accordingly. The heat is transferred to the deformable copper sheet, causing it to deform due to heat. The deformed copper sheet changes position, which drives the relevant components to move through the reset plate and connector. At the same time, the shift fork, under the action of the straightening shaft, pushes the reset copper sheet, triggering the protection mechanism to cut off the motor circuit and prevent the motor from being damaged due to overload. This mechanism can quickly cut off the circuit when the device detects overheating, with a short overall response time and a high safety factor.

[0009] Preferably, the heating copper sheet and the terminal block are provided in three sets, the deformable copper sheet is provided in two sets, and the component connector is provided in two sets.

[0010] Preferably, the rear end of the heating copper sheet is in contact with the fork, the bottom end of the reset plate is in contact with the top end of the reset copper sheet, and the reset plate and the reset connector are connected together by a connector.

[0011] Preferably, the reset mechanism includes a control panel mounted on the top of the top cover. A current adjustment column is mounted on the front left side of the control panel, a debugging button is mounted in the middle section of the control panel, a reset button is mounted on the rear right side of the control panel, a stop button is mounted on the front right side of the control panel, a reset connecting piece is mounted on the top rear end inside the top cover, and a forced reset connecting piece is mounted on the bottom of the current adjustment column. After the motor fault is cleared, a reset operation is required to restart the motor. This is achieved by operating the reset mechanism. For example, pressing the reset button activates the reset connecting piece on the reset button, completing the reset action. In special circumstances such as debugging, a forced reset can also be performed using the forced reset connecting piece on the debugging button. Furthermore, the current adjustment column can be used to set the current protection threshold of the motor overload thermal protector, ensuring that protection and reset are triggered under appropriate current conditions.

[0012] Preferably, the overload protection mechanism includes a reset copper plate and a deformation copper plate, wherein the top end of the reset copper plate contacts the left end of the reset connecting plate, the top end of the deformation copper plate contacts the right end of the reset connecting plate, and the bottom of the rear end of the forced reset connecting plate contacts the reset connecting plate.

[0013] Preferably, a wiring port is installed at the front end of the top of the protector's front cover, and a heating element mounting port is installed in the middle section of the top of the protector's front cover.

[0014] Compared with the prior art, this utility model provides a motor overload thermal protector, which has the following beneficial effects:

[0015] This motor overload thermal protector is equipped with an overload protection mechanism. When the motor is running normally, the current is conducted to the heating copper sheet through the terminals. Once the motor is overloaded, the current increases, and the heat generated by the heating copper sheet increases accordingly. The heat is transferred to the deformable copper sheet, causing it to deform due to heat. The deformed copper sheet changes position, which drives the relevant components to move through the reset plate and connector. At the same time, the shift fork, under the action of the straightening shaft, pushes the reset copper sheet, triggering the protection mechanism, cutting off the motor circuit, and preventing the motor from being damaged due to overload. This mechanism can quickly cut off the circuit when the device detects overheating, with a short overall response time and a high safety factor.

[0016] This motor overload thermal protector is equipped with a reset mechanism. After the motor fault is cleared, a reset operation is required to restart the motor. This is achieved by operating the reset mechanism, such as pressing the reset button, which activates the reset connecting piece on the reset button to complete the reset action. In special circumstances such as debugging, a forced reset can also be performed using the forced reset connecting piece on the debugging button. In addition, the current adjustment column can set the current protection threshold of the motor overload thermal protector to ensure that protection and reset are triggered under appropriate current conditions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the overload protection mechanism of this utility model.

[0021] Figure 4 This is a schematic diagram of the structural reset mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the heating copper sheet of this utility model.

[0023] In the diagram: 1. Protector front cover; 2. Protector rear cover; 3. Top cover; 4. Wiring port; 5. Heating element mounting port; 6. Overload protection mechanism; 61. Heating copper sheet; 62. Terminal block; 63. Shift fork; 64. Correction shaft; 65. Reset copper sheet; 66. Deformation copper sheet; 661. Component connector; 67. Reset piece; 68. Connector; 69. Reset connector; 7. Reset operating mechanism; 71. Control panel; 72. Current adjustment column; 73. Debug button; 731. Forced reset connector; 74. Reset button; 741. Reset connector; 75. Stop button. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] This utility model provides the following technical solution: Example 1

[0027] Please see Figure 1-5 An overload thermal protector for motors includes a front cover 1, a rear cover 2 mounted on the back of the front cover 1, a top cover 3 mounted on the top of the front cover 1 and the rear cover 2, an overload protection mechanism 6 provided inside the front cover 1 and the rear cover 2, and a reset operation mechanism 7 provided on the surface of the top cover 3.

[0028] Overload protection mechanism 6 includes a heating copper sheet 61, which is installed at the bottom front of the inside of the front cover 1 of the protector. A terminal block 62 is mounted on the surface of the heating copper sheet 61. A fork 63 is installed at the bottom of the back of the inside of the rear cover 2 of the protector. A straightening shaft 64 is installed at the bottom of the middle section inside the rear cover 2 of the protector. A reset copper sheet 65 is installed at the left end of the middle section inside the rear cover 2 of the protector. A reset piece 67 is installed at the left end of the reset copper sheet 65. A connector 68 is installed at the top left end of the inside of the top cover 3. A reset connector 69 is installed at the bottom end of the connector 68. A component connector 661 is installed inside the top cover 3. A deformable copper sheet 66 is mounted on the surface of the component connector 661. When… When the motor is running normally, the current is conducted to the heating copper sheet 61 through the terminal 62. Once the motor is overloaded, the current increases, and the heat generated by the heating copper sheet 61 increases accordingly. The heat is transferred to the deformable copper sheet 66, causing it to deform due to heat. The deformed copper sheet 66 changes position, which drives the relevant components to move through the reset piece 67 and the connector 68. At the same time, the shift fork 63, under the action of the straightening shaft 64, pushes the reset copper sheet 65, triggering the protection mechanism to cut off the motor circuit and prevent the motor from being damaged due to overload. This mechanism can quickly cut off the circuit when the device detects overheating, with a short overall response time and a high safety factor.

[0029] There are three sets of heating copper sheets 61 and terminals 62, two sets of deformable copper sheets 66, and two sets of component connectors 661.

[0030] The rear end of the heating copper plate 61 is in contact with the shift fork 63, the bottom end of the reset plate 67 is in contact with the top end of the reset copper plate 65, and the reset plate 67 and the reset connector 69 are connected together by the connector 68. Example 2

[0031] Please see Figure 1-5 Based on Embodiment 1, the reset operation mechanism 7 further includes a control panel 71, which is mounted on the top of the top cover 3. A current adjustment column 72 is mounted on the front left side of the control panel 71, a debugging button 73 is mounted in the middle of the control panel 71, a reset button 74 is mounted on the rear right side of the control panel 71, a stop button 75 is mounted on the front right side of the control panel 71, a reset connecting piece 741 is mounted on the top rear end inside the top cover 3, and a forced reset connecting piece 731 is mounted on the bottom of the current adjustment column 72. After the motor fault is cleared, a reset operation is required to restart the motor. This is achieved by operating the reset operation mechanism 7. For example, pressing the reset button 74 will activate the reset connecting piece 741 on the reset button 74, completing the reset operation. In special circumstances such as debugging, a forced reset can also be performed through the forced reset connecting piece 731 on the debugging button 73. In addition, the current adjustment column 72 can set the current protection threshold of the motor overload thermal protector to ensure that protection and reset are triggered under appropriate current conditions.

[0032] The overload protection mechanism 6 includes a reset copper plate 65 and a deformation copper plate 66. The top end of the reset copper plate 65 contacts the left end of the reset connecting piece 741, the top end of the deformation copper plate 66 contacts the right end of the reset connecting piece 741, and the bottom of the rear end of the forced reset connecting piece 731 contacts the reset connecting piece 741.

[0033] The front end of the top of the protector cover 1 is equipped with a wiring port 4, and the middle section of the top of the protector cover 1 is equipped with a heating element mounting port 5.

[0034] In actual operation, when this device is in use, the heating element is installed inside the heating element mounting port 5, and the cable is connected to the wiring port 4. When the motor is running normally, the current is conducted to the heating copper sheet 61 through the terminal 62. Once the motor is overloaded, the current increases, and the heat generated by the heating copper sheet 61 increases accordingly. The heat is transferred to the deformable copper sheet 66, causing it to deform due to heat. The position of the deformed copper sheet 66 changes, and the reset piece 67 and the connector 68 drive the relevant components to move. At the same time, the shift fork 63, under the action of the straightening shaft 64, pushes the reset copper sheet 65, triggering the protection mechanism, cutting off the motor circuit, and preventing the motor from being damaged due to overload. The setting of this mechanism can quickly cut off the circuit when the device detects overheating, with a short overall response time and a high safety factor.

[0035] After troubleshooting the motor fault, a reset operation is required to restart the motor. This is achieved by operating the reset mechanism 7. For example, pressing the reset button 74 will activate the reset connecting piece 741 on the reset button 74, completing the reset operation. In special circumstances such as debugging, a forced reset can also be performed through the forced reset connecting piece 731 on the debugging button 73. In addition, the current adjustment column 72 can set the current protection threshold of the motor overload thermal protector to ensure that protection and reset are triggered under appropriate current conditions.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A motor overload thermal protector, comprising a front cover (1), characterized in that: The back of the protector front cover (1) is equipped with a protector rear cover (2), and the top of the protector front cover (1) and the protector rear cover (2) is equipped with a top cover (3). The protector front cover (1) and the protector rear cover (2) are provided with an overload protection mechanism (6), and the top cover (3) is provided with a reset operation mechanism (7). The overload protection mechanism (6) includes a heating copper sheet (61), which is installed at the bottom front end of the front cover (1) of the protector. A terminal block (62) is installed on the surface of the heating copper sheet (61). A fork (63) is installed at the bottom back end of the back cover (2) of the protector. A correction shaft (64) is installed at the bottom middle section of the back cover (2) of the protector. A reset copper sheet (65) is installed at the left end of the middle section of the back cover (2) of the protector. A reset piece (67) is installed at the left end of the reset copper sheet (65). A connector (68) is installed at the top left end of the top cover (3). A reset connector (69) is installed at the bottom end of the connector (68). A component connector (661) is installed inside the top cover (3). A deformable copper sheet (66) is installed on the surface of the component connector (661).

2. The motor overload thermal protector according to claim 1, characterized in that: The heating copper sheet (61) and the terminal block (62) are provided in three sets, the deformable copper sheet (66) is provided in two sets, and the component connector (661) is provided in two sets.

3. The motor overload thermal protector according to claim 1, characterized in that: The rear end of the heating copper sheet (61) is in contact with the fork (63), the bottom end of the reset piece (67) is in contact with the top end of the reset copper sheet (65), and the reset piece (67) and the reset connector (69) are connected together by the connector (68).

4. The motor overload thermal protector according to claim 1, characterized in that: The reset mechanism (7) includes a control panel (71), which is installed on the top of the top cover (3). A current adjustment column (72) is installed on the front left side of the control panel (71). A debugging button (73) is installed in the middle section of the control panel (71). A reset button (74) is installed at the rear right side of the control panel (71). A stop button (75) is installed at the front right side of the control panel (71). A reset connecting piece (741) is installed at the top rear end inside the top cover (3). A forced reset connecting piece (731) is installed at the bottom of the current adjustment column (72).

5. A motor overload thermal protector according to claim 4, characterized in that: The overload protection mechanism (6) includes a reset copper plate (65) and a deformation copper plate (66). The top end of the reset copper plate (65) is in contact with the left end of the reset connecting piece (741), the top end of the deformation copper plate (66) is in contact with the right end of the reset connecting piece (741), and the bottom of the rear end of the forced reset connecting piece (731) is in contact with the reset connecting piece (741).

6. The motor overload thermal protector according to claim 1, characterized in that: The front end of the protector front cover (1) is equipped with a wiring port (4), and the middle section of the front end of the protector front cover (1) is equipped with a heating element mounting port (5).

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