stepper motor

Abstract

The utility model provides a kind of stepper motor: including coil assembly and wire cover plate, the side of coil assembly is equipped with multiple pin terminals, wire cover plate is connected with coil assembly, and cover is set on pin terminal;Wire cover plate includes cover plate body, first installation part is equipped on the both sides of cover plate body, for clamping on the coil assembly;Several through holes corresponding to pin terminal one by one are equipped on cover plate body, for pin terminal to pass through;Hollow slot is equipped on the side wall of cover plate body towards coil assembly, hollow slot is located above through hole, and extend along horizontal direction;The utility model sets hollow slot on the side wall of cover plate body towards coil assembly, removes certain material dosage, not only can save material cost, but also can relatively reduce the wall thickness of cover plate body, avoid the situation that wire cover plate appears uneven thickness after injection molding due to material shrinkage, guarantee the quality of wire cover plate, avoid affecting the subsequent assembly of wire cover plate.

Description

Technical Field

[0001] This utility model relates to the field of motor equipment technology, specifically to a stepper motor. Background Technology

[0002] A stepper motor is a device that converts electrical pulse signals into angular or linear displacement. It boasts advantages such as simple structure, high efficiency, and energy saving, and has been widely used in most technological fields. Existing stepper motors typically consist of a housing, a coil assembly housed within the housing, and a rotor. The coil assembly, as a crucial component of the stepper motor, plays a vital role in ensuring structural stability.

[0003] The coil assembly includes a mounting frame and a coil wound on the mounting frame. The coil is connected to the drive circuit via pin terminals. The mounting frame also features a wire guard plate, which protects the pin terminals and facilitates connection between the pin terminals and connectors on the drive circuit. Because the wire guard plate needs to have connector slots for connection, the material wall thickness above these slots will inevitably be larger. After injection molding, the shrinkage rate will increase, potentially leading to uneven thickness of the wire guard plate. This not only wastes material but also affects the quality of the wire guard plate, consequently impacting subsequent assembly.

[0004] In addition, since the cable cover is quickly connected by a slot at its upper end and a block on the mounting frame, the lower end of the cable cover will wobble after it is installed on the mounting frame, affecting the stability of the cable cover. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a stepper motor with stable structure and convenient assembly.

[0006] The technical solution of this utility model is to provide a stepper motor with the following structure: including a coil assembly and a wire guard plate, wherein the coil assembly is provided with a plurality of pin terminals on one side, the wire guard plate is connected to the coil assembly and covers the pin terminals; the wire guard plate includes a cover plate body, and the cover plate body is provided with first mounting parts on both sides for snapping onto the coil assembly; the cover plate body is provided with a plurality of through holes corresponding one-to-one with the pin terminals for the pin terminals to pass through; the cover plate body is provided with a hollow groove on the side wall facing the coil assembly, the hollow groove is located above the through holes and extends in the horizontal direction.

[0007] Preferably, the coil assembly includes a mounting frame and a coil wound on the mounting frame, and the pin terminal is disposed on the mounting frame, with one end of the pin terminal connected to the coil.

[0008] Preferably, the mounting frame has a second mounting portion on both sides of the pin terminal that matches the first mounting portion. The second mounting portion has a snap-fit ​​block, and the first mounting portion has a snap-fit ​​groove. The snap-fit ​​block snaps into the corresponding snap-fit ​​groove.

[0009] Preferably, the cover plate body has a downward-facing insertion groove on the side wall away from the coil assembly, and the through hole is connected to the insertion groove for the insertion end of the pin terminal to be accommodated in the insertion groove.

[0010] Preferably, the plug-in end includes a horizontally arranged guide portion and a vertically arranged plug-in portion; the inner top wall of the plug-in groove is provided with a guide groove flush with the top of the through hole, the guide portion is accommodated in the guide groove, and the plug-in portion is accommodated in the plug-in groove.

[0011] Preferably, the plug slot is detachably connected to a plug member, and the top of the plug member is provided with a plurality of pin holes corresponding one-to-one with the pin terminals, for the insertion of the plug part of the pin terminal.

[0012] Preferably, the cover plate body has an avoidance groove at the opening near the lower end of the insertion groove, and the side wall of the insertion member facing the cover plate body has a support protrusion that matches the avoidance groove, and the free end of the support protrusion abuts against the inner wall of the avoidance groove.

[0013] Preferably, the cover plate body has a recessed portion on one side wall facing the coil assembly, and two symmetrical support protrusions are provided on both sides of the lower end of the recessed portion. The free ends of the support protrusions are used to abut against the outer peripheral wall of the coil assembly.

[0014] After adopting the above structure, the stepper motor in this utility model has the following advantages compared with the prior art: 1. This utility model provides a hollow groove on the side wall of the cover plate body facing the coil assembly, which removes a certain amount of material. This not only saves material costs, but also reduces the wall thickness of the cover plate body. It avoids uneven thickness of the wire protection cover plate due to material shrinkage after injection molding, thus ensuring the quality of the wire protection cover plate and avoiding affecting the subsequent assembly of the wire protection cover plate.

[0015] 2. The guide groove on the top wall of the insertion slot can guide the guide part of the pin terminal to prevent displacement when the insertion part is inserted into the insertion slot, thereby preventing the connection of the connector from being affected.

[0016] 3. The clearance groove provides a certain clearance space for the insertion of the connector, making it easier for the connector to be inserted into the clearance groove. Since the connector is fastened to the clip on the cable cover plate by the buckle on the upper end of its outer wall, its lower end will wobble after the connector is assembled, which may lead to poor contact over time. Therefore, this utility model provides a supporting protrusion on the connector, which abuts against the inner wall of the clearance groove, lifts the lower end of the connector, and provides support, making the connection between the connector and the connector groove more secure.

[0017] 4. The cover plate body and the mounting frame are assembled by the engagement of the upper snap-fit ​​groove and snap-fit ​​block. Therefore, after the cover plate body is assembled, there will still be some wobbling space at the lower end, which may easily cause damage to the snap-fit ​​groove and snap-fit ​​block. Therefore, two symmetrical support protrusions are set on both sides of the lower end of the recess. The free end of the support protrusion abuts against the outer peripheral wall of the coil assembly, which can play a supporting role and prevent the cover plate body from shaking. Attached Figure Description

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

[0019] Figure 2 This is a half-sectional view of the present invention.

[0020] Figure 3 This is an exploded view of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the wire protection cover plate in this utility model.

[0022] Figure 5 This is a structural schematic diagram of the wire protection cover plate in another view of this utility model.

[0023] Figure 6 This is a schematic diagram of the connector structure in this utility model.

[0024] Figure 7 This is a structural schematic diagram of the connector in this utility model from another view perspective.

[0025] Explanation of reference numerals in the attached figures: 1. Coil assembly; 11. Pin terminal; 111. Plug-in end; 12. Mounting frame; 121. Second mounting part; 122. Snap-in block; 2. Wire protection cover; 21. Cover body; 211. Recessed part; 212. Supporting protrusion; 22. First mounting part; 221. Snap-in groove; 23. Through hole; 24. Hollowed-out groove; 25. Plug-in groove; 251. Guide groove; 26. Clearance groove; 27. Snap-in block; 3. Plug-in component; 31. Pin hole; 32. Supporting protrusion; 33. Buckle. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model. At the same time, the terms "first", "second", etc., are only used to distinguish the names of various components and do not have a primary or secondary relationship. Therefore, they should not be construed as limitations on this utility model.

[0028] like Figures 1-7 As shown, this utility model discloses a stepper motor: including a coil assembly 1 and a wire protection cover 2. The coil assembly 1 has a plurality of pin terminals 11 on one side. The wire protection cover 2 is connected to the coil assembly 1 and covers the pin terminals 11.

[0029] The cable guard cover 2 includes a cover body 21. The cover body 21 has first mounting parts 22 on both sides for snapping onto the coil assembly 1. The cover body 21 has a plurality of through holes 23 corresponding one-to-one with the pin terminals 11 for the pin terminals 11 to pass through. The cover body 21 has a hollow groove 24 on one side wall facing the coil assembly 1. The hollow groove 24 is located above the through holes 23 and extends in the horizontal direction.

[0030] This invention provides a hollow groove 24 on the side wall of the cover plate body 21 facing the coil assembly 1, which removes a certain amount of material. This not only saves material costs but also reduces the wall thickness of the cover plate body 21. This avoids uneven thickness of the wire protection cover plate due to material shrinkage after injection molding, ensuring the quality of the wire protection cover plate and preventing it from affecting the subsequent assembly of the wire protection cover plate.

[0031] like Figures 1-3 As shown, the coil assembly 1 includes a mounting frame 12 and a coil wound on the mounting frame 12. A pin terminal 11 is disposed on the mounting frame 12, and one end of the pin terminal is connected to the coil.

[0032] The mounting frame 12 has a second mounting part 121 on both sides of the pin terminal 11, which is matched with the first mounting part 22. The second mounting part 121 is provided with a snap-fit ​​block 122, and the first mounting part 22 is provided with a snap-fit ​​groove 221. The snap-fit ​​block 122 snaps into the corresponding snap-fit ​​groove 221.

[0033] like Figure 3 and Figure 5As shown, a downward-facing insertion groove 25 is provided on the side wall of the cover plate body 21 away from the coil assembly 1. The through hole 23 is connected to the insertion groove 25 and is used to accommodate the insertion end 111 of the pin terminal 11 in the insertion groove 25.

[0034] For example Figure 2 As shown, the plug-in end 111 includes a horizontally arranged guide part and a vertically arranged plug-in part; the inner top wall of the plug-in groove 25 is provided with a guide groove 251 that is flush with the top of the through hole 23, the guide part is accommodated in the guide groove 251, and the plug-in part is accommodated in the plug-in groove 25.

[0035] The guide groove 251 on the inner top wall of the insertion slot 25 can guide the guide portion of the pin terminal 11, preventing displacement when the insertion portion extends into the insertion slot 25, thereby preventing the connection of the connector 3 from being affected.

[0036] The connector 3 is detachably connected to the connector slot 25. The top of the connector 3 is provided with several pin holes 31 that correspond one-to-one with the pin terminals 11, for the insertion of the pin terminals 11.

[0037] An avoidance groove 26 is provided at the opening near the lower end of the insertion groove 25 on the cover plate body 21. A support protrusion 32 matching the avoidance groove 26 is provided on the side wall of the insertion member 3 facing the cover plate body 21. The free end of the support protrusion 32 abuts against the inner wall of the avoidance groove 26.

[0038] The clearance groove 26 provides a certain clearance space for the insertion of the connector 3, making it easier for the connector 3 to be inserted into the clearance groove 26. Since the connector 3 is fastened to the clip 27 of the wire protection cover plate 2 by the buckle 33 at the upper end of its outer side wall, its lower end will wobble after the connector 3 is assembled, which may lead to poor contact over time. Therefore, this utility model provides a supporting protrusion 32 on the connector 3, which abuts against the inner wall of the clearance groove 26, lifts the lower end of the connector 3, and provides support, making the connection between the connector 3 and the connector groove 25 more secure.

[0039] The cover plate body 21 and the mounting frame 12 are assembled by the cooperation of the upper snap-fit ​​groove 221 and snap-fit ​​block 122. Therefore, after the cover plate body 21 is assembled, there will still be a certain amount of shaking space at its lower end, which may easily cause damage to the snap-fit ​​groove 221 and snap-fit ​​block 122. Therefore, this utility model provides a recessed part 211 on the side wall of the cover plate body 21 facing the coil assembly 1, and provides two symmetrical support protrusions 212 on both sides of the lower end of the recessed part 211. The free end of the support protrusion 212 is used to abut against the outer peripheral wall of the coil assembly 1, which can play a supporting role and prevent the cover plate body 21 from shaking.

[0040] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A stepper motor, comprising a coil assembly (1) and a wire cover plate (2), wherein a plurality of pin terminals (11) are provided on one side of the coil assembly (1), and the wire cover plate (2) is connected to the coil assembly (1) and covers the pin terminals (11); characterized in that: The cable guard cover (2) includes a cover body (21), and the cover body (21) has a first mounting part (22) on both sides for snapping onto the coil assembly (1); the cover body (21) has a plurality of through holes (23) corresponding one-to-one with the pin terminals (11) for the pin terminals (11) to pass through; the cover body (21) has a hollow groove (24) on one side wall facing the coil assembly (1), the hollow groove (24) is located above the through holes (23) and extends in the horizontal direction.

2. The stepper motor according to claim 1, characterized in that: The coil assembly (1) includes a mounting frame (12) and a coil wound on the mounting frame (12). The pin terminal (11) is disposed on the mounting frame (12) and one end of it is connected to the coil.

3. The stepper motor according to claim 2, characterized in that: The mounting frame (12) has a second mounting part (121) on both sides of the pin terminal (11) that matches the first mounting part (22). The second mounting part (121) has a snap-fit ​​block (122), and the first mounting part (22) has a snap-fit ​​groove (221). The snap-fit ​​block (122) snaps into the corresponding snap-fit ​​groove (221).

4. The stepper motor according to claim 1, characterized in that: The cover plate body (21) has a downward-facing insertion groove (25) on one side wall away from the coil assembly (1). The through hole (23) is connected to the insertion groove (25) and is used to accommodate the insertion end (111) of the pin terminal (11) in the insertion groove (25).

5. The stepper motor according to claim 4, characterized in that: The plug end (111) includes a horizontally arranged guide part and a vertically arranged plug part; the inner top wall of the plug groove (25) is provided with a guide groove (251) that is flush with the top of the through hole (23), the guide part is accommodated in the guide groove (251), and the plug part is accommodated in the plug groove (25).

6. The stepper motor according to claim 4, characterized in that: The plug slot (25) is detachably connected to a plug member (3). The top of the plug member (3) is provided with several pin holes (31) corresponding to the pin terminals (11) for the insertion part of the pin terminals (11) to be inserted.

7. The stepper motor according to claim 6, characterized in that: The cover plate body (21) has an opening near the lower end of the insertion groove (25) with a relief groove (26). The insertion member (3) has a support protrusion (32) on one side wall facing the cover plate body (21) that matches the relief groove (26). The free end of the support protrusion (32) abuts against the inner wall of the relief groove (26).

8. The stepper motor according to claim 1, characterized in that: The cover plate body (21) has a recess (211) on one side wall facing the coil assembly (1). Two symmetrical support protrusions (212) are provided on both sides of the lower end of the recess (211). The free end of the support protrusion (212) is used to abut against the outer peripheral wall of the coil assembly (1).

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