High-low gear current regulation limiting device of motor protector and motor protector

Abstract

The utility model provides a motor protector and a high-low gear current regulation limiting device thereof, the high-low gear current regulation limiting device comprises a first limiting piece and a second limiting piece which are arranged on a shell; the flow adjusting knob is rotationally installed on the shell, a gear block is arranged on the flow adjusting knob and rotates between the first limiting piece and the second limiting piece, a first gear face and a second gear face are arranged on the two sides of the gear block respectively, and when the first gear face of the gear block abuts against the first limiting piece, the second gear face of the gear block abuts against the second limiting piece. The rotating position of the current adjusting knob corresponds to the low-level current value mark; when the second gear face abuts against the second limiting piece, the rotating position of the current adjusting knob corresponds to the high-position current value mark. The structure can ensure that the current adjusting knob rotates within a determined range, so that the situation that the current adjusting knob rotates excessively due to misoperation of a user is avoided, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor protectors, in particular to a high-low gear current regulating and limiting device of a motor protector and a motor protector. Background Art

[0002] When an overload current occurs in the motor protector, the bimetallic strip of its thermal deformation device will heat up and deform, and then drive the switch to trip and disconnect, thereby protecting the motor. Before the product leaves the factory, the motor protector must be tested to determine the current corresponding to the thermal deformation of the thermal deformation device, and the corresponding current mark must be printed or engraved on the outer shell, so that the user can set the corresponding current by turning the current adjustment knob when using it. However, in actual use, the user may improperly operate the current adjustment knob and over-rotate it, resulting in the following situations: 1) If the current set by the motor protector is greater than the motor current, when the motor has an abnormal current, the motor protector cannot cut off the power, which may lead to serious consequences such as motor burning; 2) If the current set by the motor protector is less than the motor current, at this time, although the current does not exceed the motor current, the motor is forced to stop normal operation due to the disconnection of the motor protector. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defect in the prior art that users are prone to over-rotate the flow regulating knob due to improper operation, thereby causing the motor to burn out or the motor to stop working when it is working normally, thereby providing a high and low-speed flow regulating limit device and a motor protector that prevents misoperation and has high reliability.

[0004] To this end, the utility model provides a high and low gear current regulating limit device of a motor protector, comprising: a first limit member and a second limit member, which are arranged on a shell; a current regulating knob, which is rotatably installed on the shell, and a stop block is provided on the current regulating knob, and the stop block rotates between the first limit member and the second limit member, and has a first stop surface and a second stop surface on both sides thereof, respectively, wherein when the first stop surface of the stop block abuts against the first limit member, the rotation position of the current regulating knob corresponds to a low current value mark; when the second stop surface abuts against the second limit member, the rotation position of the current regulating knob corresponds to a high current value mark.

[0005] The shell is formed with two through holes for the first limiting member and the second limiting member to be inserted into.

[0006] After the first limiting member and the second limiting member are inserted into the corresponding through holes, they are fixed to the shell by glue.

[0007] The current regulating knob is provided with an indication mark corresponding to the current mark.

[0008] A slot for inserting a screwdriver is provided on the top of the flow regulating knob.

[0009] The utility model also provides a motor protector, comprising the high and low gear current regulating and limiting device of the motor protector as described above.

[0010] The technical solution of the utility model has the following advantages:

[0011] 1. The high and low gear current regulating limit device of the motor protector provided by the utility model has a stop block on the current regulating knob, and the two sides thereof have a first stop surface and a second stop surface respectively, and the housing is provided with a first stop piece and a second stop piece, and the stop block rotates between the first stop piece and the second stop piece, wherein when the first stop surface of the stop block abuts against the first stop piece, the rotation position of the current regulating knob corresponds to the current mark of the low current value mark; when the second stop surface abuts against the second stop piece, the rotation position of the current regulating knob corresponds to the current mark of the high current value mark. The above structure can ensure that the current regulating knob rotates within a certain range, thereby avoiding the situation where the current regulating knob is excessively rotated due to user misoperation, and improving reliability.

[0012] 2. The high- and low-speed current regulating limit device of the motor protector provided by the utility model has a shell formed with two through holes for inserting the first limit piece and the second limit piece. After the first limit piece and the second limit piece are inserted into the corresponding through holes, they are fixed to the shell by glue to prevent the first limit piece and the second limit piece from being withdrawn due to vibration and the like during use, thereby improving reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is a schematic diagram of the structure of the motor protector of the utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0016] Figure 3 It is a structural schematic diagram of a high-low-speed flow regulating and limiting device;

[0017] Figure 4 It is a three-dimensional diagram of the flow regulating knob, the first limiting member, and the second limiting member;

[0018] Figure 5It is a three-dimensional diagram of a motor protector;

[0019] Figure 6 A perspective view of the shell.

[0020] Explanation of the accompanying drawings: 1. First limit member; 2. Second limit member; 3. Shell; 4. Current adjustment knob; 5. Shift block; 6. First shift surface; 7. Second shift surface; 8. Low current value mark; 9. High current value mark; 10. Perforation; 11. Indication mark; 12. Slot. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Example

[0026] This embodiment provides a motor protector, such as Figure 3 As shown, it includes a shell 3 and a high-low-speed flow regulating limit device arranged on the shell 3, and the high-low-speed flow regulating limit device includes a flow regulating knob 4, a first limit member 1 and a second limit member 2.

[0027] The first stopper 1 and the second stopper 2 are fixedly arranged on the side plate of the housing 3. Figure 3 ,like Figure 5 and Figure 6 As shown, the shell 3 is formed with two through holes 10 for inserting the first limit member 1 and the second limit member 2. During assembly, the corresponding positions of the low current value and the high current value of the current regulating knob 4 are first tested and marked, and then the first limit member 1 and the second limit member 2 are inserted into the corresponding through holes 10, and are respectively abutted against the current regulating knob 4 at the marks of the low current value and the high current value, and then fixed to the shell 3 by glue.

[0028] The flow regulating knob 4 is rotatably mounted on the housing 3. Figure 4 As shown, a stop block 5 is provided on the outer wall of the stem of the flow regulating knob 4. The stop block 5 rotates between the first stop member 1 and the second stop member 2. In this embodiment, the stop block 5 is a fan-shaped structure, and has a first stop surface 6 and a second stop surface 7 on both sides. Figure 1 and Figure 2 As shown, when the current regulating knob 4 is rotated counterclockwise until the first stop surface 6 of the stop block 5 abuts against the first limiter 1, the rotation position of the current regulating knob 4 corresponds to the low current value mark 8; when the current regulating knob 4 is rotated clockwise until the second stop surface 7 abuts against the second limiter 2, the rotation position of the current regulating knob 4 corresponds to the high current value mark 9. In this embodiment, the current regulating knob 4 is provided with an indication mark 11 corresponding to the current mark, and the top of the current regulating knob 4 is provided with a slot 12 for inserting a screwdriver. The screwdriver is inserted into the slot 12 to adjust the current regulating knob 4 to adjust the appropriate current value between the low current value mark 8 and the high current value mark 9.

[0029] The high and low gear current regulating limit device of the motor protector provided by the utility model is provided with a stop block 5, a first limit piece 1 and a second limit piece 2, and the stop block 5 rotates between the first limit piece 1 and the second limit piece 2, wherein when the first stop surface 6 of the stop block 5 abuts against the first limit piece 1, the rotation position of the current regulating knob 4 corresponds to the current mark of the low current value mark 8; when the second stop surface 7 abuts against the second limit piece 2, the rotation position of the current regulating knob 4 corresponds to the current mark of the high current value mark 9. The above structure can ensure that the current regulating knob 4 rotates within a certain range, thereby avoiding the situation where the current regulating knob 4 rotates excessively due to user's misoperation, and improving reliability.

[0030] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A high-low-speed current regulating and limiting device for a motor protector, characterized in that: include: A first limiting member (1) and a second limiting member (2) are arranged on the housing (3); A flow regulating knob (4) is rotatably mounted on the housing (3), and a stop block (5) is provided on the flow regulating knob (4). The stop block (5) is rotated between the first limit member (1) and the second limit member (2), and has a first stop surface (6) and a second stop surface (7) on both sides thereof, respectively, wherein when the first stop surface (6) of the stop block (5) abuts against the first limit member (1), the rotation position of the flow regulating knob (4) corresponds to a low current value mark (8); and when the second stop surface (7) abuts against the second limit member (2), the rotation position of the flow regulating knob (4) corresponds to a high current value mark (9).

2. The high and low gear current regulating and limiting device of the motor protector according to claim 1 is characterized in that: The housing (3) is formed with two through holes (10) for inserting the first limiting member (1) and the second limiting member (2).

3. The high and low gear current regulating and limiting device of the motor protector according to claim 2 is characterized in that: After the first limiting member (1) and the second limiting member (2) are inserted into the corresponding through-holes (10), they are fixed to the housing (3) by glue.

4. The high and low gear current regulating and limiting device of the motor protector according to claim 1 is characterized in that: The current regulating knob (4) is provided with an indication mark (11) arranged corresponding to the current mark.

5. The high and low gear current regulating and limiting device of the motor protector according to claim 1 is characterized in that: A slot (12) for inserting a screwdriver is provided on the top of the flow regulating knob (4).

6. A motor protector, characterized in that: It comprises a high and low gear current regulating and limiting device of a motor protector as described in any one of claims 1 to 5.

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