Connecting device of magnetic starter

Abstract

The utility model provides a connecting device of a magnetic starter, the magnetic starter comprises a shell and an upper cover arranged above the shell, the connecting device comprises a positioning rod inserted into a cover plate and a threaded rod inserted into the shell, the threaded rod can be inserted into the positioning rod and is in threaded connection with the positioning rod, and the upper cover is arranged above the shell. A thread extension part is arranged on the positioning rod, an insertion groove for the positioning rod to be inserted is formed in the shell, a thread groove matched with the thread extension part is formed in the insertion groove, and an abutting device used for fixing the position of the positioning rod is arranged between the thread extension part and the insertion groove. According to the connecting device, the defect that in the prior art, after the fastening nails are disassembled for multiple times, the connecting positions of the shell and the cover plate and the fastening nails are abraded, and therefore gaps are formed in the connecting positions of the shell and the cover plate can be overcome.

Description

Technical Field

[0001] This utility model relates to the field of magnetic starter technology, and specifically to a connection device for a magnetic starter. Background Technology

[0002] The magnetic starter achieves safe starting and stopping of the motor through electromagnetic control, and provides overload and undervoltage protection to ensure stable operation of the equipment. The magnetic starter includes a housing and a cover plate located on top of the housing. The housing and the cover plate are connected by fastening screws. In the prior art, after repeated disassembly and reassembly, the fastening screws will wear at the connection between the housing and the cover plate and the fastening screws, resulting in gaps at the connection between the housing and the cover plate. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defect in the prior art that the fastening nail will wear at the connection between the housing and the cover plate after multiple disassemblies, resulting in gaps at the connection between the housing and the cover plate, thereby providing a connection device for a magnetic starter with improved service life.

[0004] Therefore, this utility model provides a connecting device for a magnetic starter. The magnetic starter includes a housing and a top cover disposed on the top of the housing. The connecting device includes a positioning rod inserted into the top cover and a threaded rod inserted into the housing. The threaded rod can be inserted into the positioning rod and threadedly connected to the positioning rod. The positioning rod is provided with a threaded extension. The housing is provided with a slot for the positioning rod to be inserted. The slot has a threaded groove adapted to the threaded extension. An abutment device for fixing the position of the positioning rod is provided between the threaded extension and the slot.

[0005] Furthermore: the abutting device includes an abutting block disposed on one side of the threaded extension or slot and an extension post disposed on the other side that can abut against the abutting block, and the positioning rod has a first position where the abutting block abuts against the extension post and a second position where the abutting block is separated from the extension post.

[0006] Furthermore: the abutment block is located near the end of the threaded extension, and the extension post is located on the inner sidewall of the slot.

[0007] Furthermore, the slot sidewall is also provided with a clearance groove for avoiding the threaded extension.

[0008] Furthermore: a blind hole is provided above the positioning rod for inserting the threaded rod, the inner wall of the blind hole is provided with an internal thread, and the outer side of the threaded rod is provided with an external thread that matches the internal thread.

[0009] The technical solution of this utility model has the following advantages:

[0010] 1. The present invention provides a connecting device for a magnetic starter. During assembly, a positioning rod can be placed under the top cover, and then a threaded rod is threaded through the top cover and connected to the positioning rod below the top cover. When installing the top cover and the housing, the positioning rod is placed in the slot, and then a Phillips screwdriver is inserted into the Phillips groove at the upper end of the threaded rod. The threaded rod is turned with the Phillips screwdriver to screw it into the positioning rod, so that the threaded extension and the slot are positioned. In this way, the housing and the top cover are connected together. When it is necessary to separate the top cover and the housing, the screwdriver is used to remove the threaded rod from the positioning rod. The positioning rod loses the limitation of the threaded rod and can move in the slot, so that the threaded extension separates from the threaded groove and can move in the slot. In this way, the positioning rod can be quickly removed from the slot, and finally the top cover and the housing can be separated. This is superior to the prior art. During installation and disassembly, it is only necessary to unscrew the threaded rod from the positioning rod, and the positioning rod can be easily removed from the slot.

[0011] 1. The present invention provides a connecting device for a magnetic starter, such as... Figure 4 As shown, the abutment device includes an abutment block disposed at the end of the threaded extension and an extension post disposed on the inner side wall of the slot. The threaded extension is spirally upward, and the abutment block is disposed at the lower end of the threaded extension. When the positioning rod is placed into the slot, the Phillips screwdriver can rotate the threaded rod to drive the threaded extension to rotate along the thread groove until the abutment block abuts against the extension post. At this point, the positioning rod stops rotating, but the threaded rod will continue to rotate. During rotation, it will gradually screw into the positioning rod, thereby completing the connection between the housing and the top cover. When it is necessary to remove the top cover, the threaded rod is turned in the opposite direction, which will cause the threaded rod to come out of the positioning rod. After the positioning rod loses the limitation of the threaded rod, the positioning rod can move in the slot, so that the user can easily remove the positioning rod from the slot and finally open the top cover to inspect or replace the parts inside the housing. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is the front view of the magnetic starter;

[0014] Figure 2 This is a cross-sectional view of a magnetic starter.

[0015] Figure 3Another cross-sectional view of the magnetic starter;

[0016] Figure 4 This is a cross-sectional view of the connection structure between the positioning rod and the slot;

[0017] Figure 5 This is a schematic diagram of the connection structure between the positioning rod and the threaded rod.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Housing; 11. Slot; 12. Threaded groove; 2. Top cover; 3. Positioning rod; 4. Threaded rod; 41. Threaded extension; 5. Abutting device; 51. Abutting block; 52. Extension post; 6. Clearance groove; 7. Blind hole. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Example

[0025] This embodiment provides a connecting device for a magnetic starter. The magnetic starter includes a housing 1 and a top cover 2 disposed on the top of the housing 1. The connecting device includes a positioning rod 3 inserted into the top cover and a threaded rod 4 inserted into the housing 1. The threaded rod 4 can be inserted into the positioning rod 3 and threadedly connected to the positioning rod 3. The positioning rod 3 is provided with a threaded extension 41. The housing 1 is provided with a slot 11 for the positioning rod 3 to be inserted. The slot 11 has a threaded groove 12 adapted to the threaded extension 41. An abutment device 5 for fixing the position of the positioning rod 3 is provided between the threaded extension 41 and the slot 11.

[0026] The specific improvements mentioned above are as follows: Figures 1-3 As shown, during assembly, the positioning rod 3 can be placed below the upper cover 2, and then the threaded rod 4 can be threaded through the upper cover 2 and connected to the positioning rod 3 below the upper cover 2. When installing the upper cover 2 and the housing 1, the positioning rod 3 is placed into the slot 11, and then a Phillips screwdriver is inserted into the Phillips groove at the upper end of the threaded rod 4. The threaded rod 4 is turned with the Phillips screwdriver to screw it into the positioning rod 3, so that the threaded extension 41 and the slot 11 are positioned. In this way, the housing 1 and the upper cover 2 are connected together. When it is necessary to separate the upper cover 2 and the housing 1, the threaded rod 4 is removed from the positioning rod 3 with a screwdriver. The positioning rod 3 loses the limitation of the threaded rod 4 and can move in the slot 11, thereby opening the threaded extension. 41 separates from the threaded groove 12 and can move within the slot 11, thus allowing the positioning rod 3 to be quickly removed from the slot 11, ultimately separating the top cover 2 from the housing 1. This is superior to the prior art. During installation and disassembly, it is only necessary to unscrew the threaded rod 4 from the positioning rod 3, and the positioning rod 3 can be easily removed from the slot 11. Furthermore, compared to the prior art, when reinstalling after the fastener is removed, the housing 1 may be damaged if the fastener is forcibly screwed in because it does not fit properly with its corresponding groove. In this embodiment, the threaded rod 4 and the positioning rod 3 do not need to be completely removed. It is only necessary to screw the threaded rod 4 upwards a certain distance, and the positioning rod 3 can be pulled out from the slot 11.

[0027] Based on the above embodiments: the abutting device 5 includes an abutting block 51 disposed on one side of the threaded extension portion 41 or the slot 11 and an extension post 52 disposed on the other side and capable of abutting the abutting block 51. The positioning rod 3 has a first position where the abutting block 51 abuts the extension post 52 and a second position where the abutting block 51 is separated from the extension post 52.

[0028] Based on the above embodiments: the abutment block 51 is located near the end of the threaded extension 41, and the extension post is located on the inner sidewall of the slot 11.

[0029] The specific improvements mentioned above are as follows: Figure 4As shown, the abutting device 5 includes an abutting block 51 disposed at the end of the threaded extension 41 and an extension post disposed on the inner side wall of the slot 11. The threaded extension 41 is spirally upward, and the abutting block 51 is disposed at the lower end of the threaded extension 41. When the positioning rod 3 is placed in the slot 11, the Phillips screwdriver can rotate the threaded extension 41 along the threaded groove 12 when rotating the threaded rod 4 until the abutting block 51 abuts against the extension post 52. At this point, the positioning rod 3 stops rotating, but the threaded rod 4 continues to rotate. During rotation, it gradually screws into the positioning rod 3, thereby completing the connection between the housing 1 and the top cover 2. When it is necessary to remove the top cover 2, the threaded rod 4 is turned in the opposite direction, which will cause the threaded rod 4 to come out of the positioning rod 3. After the positioning rod 3 loses the limitation of the threaded rod 4, the positioning rod 3 can move in the slot 11, so that the user can easily remove the positioning rod 3 from the slot 11 and finally open the top cover 2 to inspect or replace the parts inside the housing 1.

[0030] Based on the above embodiments: the side wall of the slot 11 is also provided with a clearance groove 6 for avoiding the threaded extension 41.

[0031] The specific improvements mentioned above are as follows: Figure 3 As shown, the clearance groove 6 allows the operator to observe the current state of the positioning rod 3, and also allows the positioning rod 3 to be avoided, so that the positioning rod 3 can rotate within the slot 11 along the extension direction of the threaded groove 12.

[0032] Based on the above embodiments: a blind hole 7 is provided above the positioning rod 3 for inserting the threaded rod 4, the inner wall of the blind hole 7 is provided with an internal thread, and the outer side of the threaded rod 4 is provided with an external thread that matches the internal thread.

[0033] The specific improvements mentioned above are as follows: Figure 3 and Figure 5 As shown, a blind hole 7 is provided above the positioning rod 3. The blind hole 7 has an internal thread. During installation, the user can rotate the threaded rod 4 with a Phillips screwdriver so that the threaded rod 4 can be screwed into the blind hole 7 to complete the connection between the housing 1 and the top cover 2.

[0034] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A connecting device of a magnetic starter comprising a housing (1) and an upper cover (2) arranged above the housing (1), characterized in that: The connecting device comprises a positioning rod (3) inserted into the cover plate and a threaded rod (4) inserted into the shell (1), the threaded rod (4) can be inserted into and screwed with the positioning rod (3), the positioning rod (3) is provided with a threaded extension (41), the shell (1) is provided with a slot (11) for inserting the positioning rod (3), the slot (11) has a threaded groove (12) matched with the threaded extension (41), and the threaded extension (41) and the slot (11) are provided with abutting devices (5) for fixing the position of the positioning rod (3).

2. A coupling device for a magnetic starter according to claim 1, characterized in that: The abutting devices (5) comprise abutting blocks (51) arranged on one side of the threaded extension (41) or the slot (11) and extension columns (52) arranged on the other side and capable of abutting with the abutting blocks (51), the positioning rod (3) has a first position where the abutting blocks (51) and the extension columns (52) abut and a second position where the abutting blocks (51) and the extension columns (52) are separated.

3. A coupling device for a magnetic starter according to claim 2, characterized in that: The abutting blocks (51) are arranged at the position close to the end of the threaded extension (41), and the extension columns (52) are arranged on the inner side wall of the slot (11).

4. A coupling device for a magnetic starter according to claim 3, characterized in that: The side wall of the slot (11) is further provided with an avoiding groove (6) for avoiding the threaded extension (41).

5. A coupling device for a magnetic starter according to any one of claims 1-4, characterized in that: The positioning rod (3) is provided with a blind hole (7) for inserting the threaded rod (4), the inner side wall of the blind hole (7) is provided with an internal thread, and the outer side of the threaded rod (4) is provided with an external thread matched with the internal thread.

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