Chip built-in wire protection box and stepping motor thereof

Abstract

The utility model relates to the technical field of motors, in particular to a chip built-in type wire protection box and a stepping motor thereof, which comprise a chip, a wire protection box body fixed on a framework assembly and internally provided with an accommodating cavity, and a circuit board positioned in the accommodating cavity and integrated with the chip, a needle seat is formed on one side of the framework assembly, a contact pin is inserted into the needle seat, one end of the contact pin is connected with the circuit board, the other end of the contact pin is connected with a coil wound on the framework assembly, a lead is led out of the circuit board, and the lead extends out of the containing cavity; according to the utility model, the chip is integrated on the circuit board, the circuit board is installed in the wire protection box, the contact pin is electrically connected with the coil, a signal is led out through the lead, the chip adopts a built-in structure and is arranged in the wire protection box, and the protection box does not need to be independently adopted for installation, so that the installation space is saved, and the requirement of miniaturization of the motor is met.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a chip-embedded cable protection box and its stepper motor. Background Technology

[0002] In automotive systems, air conditioning typically uses stepper motors to control airflow. These motors are usually controlled by chips, which are typically independent modules installed in their corresponding protective boxes. The chips are then connected to the protective boxes via wires, which in turn connect to the motor coils extending into the protective boxes to drive the motor. In other words, the chips have an external structure, and the protective boxes for their installation require a large amount of space, which does not meet the current demand for miniaturized motors. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to solve the problem that the chip is an external structure in the prior art, and the protective box for its installation needs to occupy a large space, which does not meet the current demand for miniaturization of motors, a chip-in-place protective box and its stepper motor are provided.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: including a chip, a wire protection box body fixed on a skeleton assembly and having a receiving cavity inside, and a circuit board located in the receiving cavity and integrating the chip; a pin seat is formed on one side of the skeleton assembly, a pin is inserted on the pin seat, one end of the pin is connected to the circuit board, and the other end is connected to a coil wound on the skeleton assembly, and a lead wire is led out from the circuit board, the lead wire extending out of the receiving cavity.

[0005] Furthermore, there are several pins, which are divided into coil pins connected to the coil on the skeleton assembly and grounding pins for grounding. The circuit board is equipped with a busbar for inserting the pins. The busbar is provided with coil holes for inserting the coil pins and grounding holes for inserting the grounding pins.

[0006] Furthermore, the cable protection box includes a box body and a cover plate, one of which protrudes to form a snap-fit ​​protrusion, and the other is recessed to form a snap-fit ​​groove into which the snap-fit ​​protrusion engages.

[0007] Furthermore, the cable protection box includes a box body, and the side of the box body facing away from the skeleton assembly is sealed with adhesive.

[0008] Furthermore, the cavity wall of the receiving cavity protrudes to form a limiting step for limiting the circuit board.

[0009] Furthermore, the snap-fit ​​protrusion has a guide surface formed on it to guide it into the snap-fit ​​groove.

[0010] Furthermore, one end of the coil pin is a plug-in section that is plugged into the busbar, and the other end is a winding section for the coil to be wound on the skeleton assembly. A connecting section is provided between the plug-in section and the winding section, and several through holes are provided on the pin seat for the plug-in section to pass through.

[0011] Furthermore, the pin holder protrudes to the side away from the chip and forms several bumps, with a receiving groove formed between two adjacent bumps for accommodating the connecting segment.

[0012] A stepper motor includes a frame assembly, a coil wound on the frame assembly, and the aforementioned wire protection box. The frame assembly includes an upper frame and a lower frame that are fixedly connected, and an upper electrode plate is provided on the side of the upper frame away from the lower frame. A middle electrode plate is provided between the upper frame and the lower frame.

[0013] The beneficial effects of this utility model are as follows: This utility model integrates the chip on the circuit board and installs the circuit board in the cable protection box. It uses pins to electrically connect with the coil and leads out the signal through the lead wire. The chip adopts a built-in structure and is set in the cable protection box, so there is no need to use a separate protective box for its installation, which saves installation space and meets the needs of motor miniaturization. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention from a first-person perspective;

[0016] Figure 2 This is a three-dimensional schematic diagram of the present invention from a second perspective;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 This is a three-dimensional schematic diagram of the present invention after the cable protection box body has been removed;

[0019] Figure 5 This is a front view of the present invention after the cable protection box body has been removed;

[0020] Figure 6 This is a three-dimensional schematic diagram of the present invention after removing the cable protection box body and circuit board;

[0021] In the picture:

[0022] 1. Chip;

[0023] 2. Cable protection box body; 201. Receiving cavity; 202. Box body; 203. Cover plate; 204. Snap-fit ​​protrusion; 2041. Guide surface; 2042. Abutment surface; 205. Snap-fit ​​groove; 206. Limiting step;

[0024] 3. Circuit board;

[0025] 4. Skeleton assembly; 401. Pin holder; 4011. Perforation; 4012. Protrusion; 4013. Receiving groove; 4014. Connector; 402. Upper skeleton; 403. Lower skeleton;

[0026] 5. Pin; 501. Coil pin; 5011. Connecting section; 5012. Winding section; 5013. Connecting section; 502. Grounding pin;

[0027] 6. Lead wire;

[0028] 7. Busbar; 701. Coil hole; 702. Grounding hole;

[0029] 8. Upper electrode plate;

[0030] 9. Middle plate. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0032] like Figures 1-3 As shown, a chip-embedded cable guard box includes a chip 1, a cable guard box body 2 fixed on a frame assembly 4 and having a receiving cavity 201 inside, and a circuit board 3 located in the receiving cavity 201 and integrating the chip 1. The chip 1 adopts an embedded structure and is set in the cable guard box, eliminating the need for a separate protective box for its installation, saving installation space and meeting the requirements of motor miniaturization.

[0033] A needle holder 401 is formed on one side of the skeleton assembly 4. A needle 5 is inserted into the needle holder 401. One end of the needle 5 is connected to the circuit board 3, and the other end is connected to the coil wound on the skeleton assembly 4. A lead wire 6 extends out of the circuit board 3 and extends out of the receiving cavity 201. The lead wire 6 transmits the signal to the control system.

[0034] In some examples, there are several pins 5, which are spaced apart. The pins 5 are divided into coil pins 501 connected to the coil on the skeleton assembly 4 and grounding pins 502 for grounding. The circuit board 3 is equipped with a busbar 7 for inserting the pins 5. The busbar 7 is provided with a coil hole 701 for inserting the coil pin 501 and a grounding hole 702 for inserting the grounding pin 502. The grounding hole 702 and the grounding pin 502 are both reserved. When there is a grounding requirement, grounding is achieved by the cooperation of the grounding pin 502 and the grounding hole 702.

[0035] In some examples, the cable protection box body 2 includes a box body 202 and a cover plate 203. One of them protrudes to form a snap-fit ​​protrusion 204, and the other is recessed to form a snap-fit ​​groove 205 for the snap-fit ​​protrusion 204 to be snapped into. The box body 202 and the cover plate 203 are fixed by the cooperation of the snap-fit ​​protrusion 204 and the snap-fit ​​groove 205, thereby confining the chip 1 within the receiving cavity 201. The number of snap-fit ​​protrusions 204 is at least two.

[0036] In some examples, the cable protection box body 2 includes a box body 202, and the side of the box body 202 opposite to the skeleton assembly 4 is sealed with adhesive to confine the chip 1 within the receiving cavity 201.

[0037] In some examples, both the receiving cavity 201 and the circuit board 3 are generally rectangular. At least one side of the cavity wall of the receiving cavity 201 has a limiting step 206 for limiting the circuit board 3. The limiting step 206 can prevent the circuit board 3 from being misaligned when it is placed into the receiving cavity 201 and connected with the pin 5. When only one side of the cavity wall has the limiting step 206, the cavity wall is opposite to the pin seat 401 and away from the pin seat 401, thereby improving the accuracy of the insertion process. At the same time, the cavity wall of the receiving cavity 201 has a relief slope.

[0038] In some examples, the snap-fit ​​protrusion 204 has a guide surface 2041 for guiding it into the snap-fit ​​groove 205. The guide surface 2041 can be, but is not limited to, an arc surface or a slope. When the cover plate 203 is closed, the guide surface 2041 facilitates the snap-fit ​​protrusion 204 into the groove. The snap-fit ​​protrusion 204 has an abutting surface 2042 that abuts against the groove wall of the snap-fit ​​groove 205 to lock the box body 202 and the cover plate 203. The abutting surface 2042 is preferably a plane, which can improve the fixing effect of the box body 202 and the cover plate 203.

[0039] In some examples, the coil pin 501 has a bent structure, with one end being a plug-in section 5011 that plugs into the busbar 7, and the other end being a winding section 5012 for winding the coil on the skeleton assembly 4. A connecting section 5013 is provided between the plug-in section 5011 and the winding section 5012. The connecting section 5013 is formed by bending from the tail of the plug-in section 5011 at a bending angle of approximately 90°. The winding section 5012 is formed by bending from the tail of the connecting section 5013 at a bending angle of approximately 45°. The pin seat 401 has several through holes 4011 through which the plug-in section 5011 passes. Each through hole 4011 passes through its corresponding plug seat 4014, and a connecting bridge is provided between two adjacent plug seats 4014.

[0040] In some examples, the pin holder 401 protrudes to the side away from the chip 1 to form a plurality of bumps 4012, and a receiving groove 4013 for accommodating the connecting segment 5013 is formed between two adjacent bumps 4012. The plurality of receiving grooves 4013 correspond one-to-one with a plurality of through holes 4011 and each receiving groove 4013 is connected to its corresponding through hole 4011. The connecting segment 5013 formed by bending from the tail of the insertion segment 5011 is located in the receiving groove 4013.

[0041] A stepper motor includes a frame assembly 4, a coil wound on the frame assembly 4, and a wire guard box. The frame assembly 4 includes an upper frame 402 and a lower frame 403 fixedly connected. A pin seat 401 is located on the upper frame 402, and the upper frame 402 is bent to form a hook. The wire guard box has an insert hole on the side near the frame for the hook to be inserted to fix the upper frame 402 to the wire guard box body 2. An upper electrode plate 8 is provided on the side of the upper frame 402 away from the lower frame 403, and a middle electrode plate 9 is provided between the upper frame 402 and the lower frame 403.

[0042] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A chip-embedded cable protection box, characterized in that: The device includes a chip (1), a wire housing body (2) fixed on a frame assembly (4) and having a receiving cavity (201) inside, and a circuit board (3) located in the receiving cavity (201) and integrating the chip (1); a pin seat (401) is formed on one side of the frame assembly (4), and a pin (5) is inserted on the pin seat (401). One end of the pin (5) is connected to the circuit board (3), and the other end is connected to a coil wound on the frame assembly (4). A lead wire (6) is led out from the circuit board (3) and extends out of the receiving cavity (201).

2. The chip-embedded cable protection box according to claim 1, characterized in that: There are several pins (5), which are divided into coil pins (501) connected to the coil on the skeleton assembly (4) and grounding pins (502) for grounding. The circuit board (3) is equipped with a busbar (7) for inserting the pins (5). The busbar (7) is provided with a coil hole (701) for inserting the coil pin (501) and a grounding hole (702) for inserting the grounding pin (502).

3. The chip-embedded cable protection box according to claim 1, characterized in that: The cable protection box body (2) includes a box body (202) and a cover plate (203), one of which protrudes to form a snap-fit ​​protrusion (204), and the other is recessed to form a snap-fit ​​groove (205) into which the snap-fit ​​protrusion (204) is snapped.

4. The chip (1) built-in cable protection box according to claim 1, characterized in that: The cable protection box body (2) includes a box body (202), and the side of the box body (202) facing away from the skeleton assembly (4) is sealed with glue.

5. A chip-embedded cable protection box according to claim 1, characterized in that: The cavity wall of the receiving cavity (201) protrudes to form a limiting step (206) for limiting the circuit board (3).

6. A chip-embedded cable protection box according to claim 3, characterized in that: The snap-fit ​​protrusion (204) has a guide surface (2041) for guiding it into the snap-fit ​​groove (205).

7. A chip-embedded cable protection box according to claim 2, characterized in that: One end of the coil pin (501) is a plug-in section (5011) that is plugged into the busbar (7), and the other end is a winding section (5012) for the coil to be wound on the skeleton assembly (4). A connecting section (5013) is provided between the plug-in section (5011) and the winding section (5012).

8. A chip-embedded cable protection box according to claim 7, characterized in that: The pin holder (401) protrudes to the side away from the chip (1) and forms a plurality of bumps (4012), and a receiving groove (4013) for accommodating the connecting segment (5013) is formed between two adjacent bumps (4012).

9. A stepper motor, comprising a frame assembly (4), a coil wound on the frame assembly (4), and a chip-embedded cable guard as described in any one of claims 1-8, characterized in that: The skeleton assembly (4) includes an upper skeleton (402) and a lower skeleton (403) that are fixedly connected. An upper electrode plate (8) is provided on the side of the upper skeleton (402) that is away from the lower skeleton (403). A middle electrode plate (9) is provided between the upper skeleton (402) and the lower skeleton (403).

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